Joshua wrote 13 articles for the school newspaper this year. Paulette wrote 7 more articles than Joshua. Jeff wrote as many articles as Paulette. How many articles did they write in all?

Answer:

i believe  its  B

Step-by-step explanation:

Answer:

The answer is 8,9,10

Step-by-step explanation:

Answer:

The least value of (r+s) is (12+14)=26

Step-by-step explanation:

Well, first let us solve equation of 11(s-1)=13(r-1), which results in 11s-11=13r-13. Hence, 11s+2=13r. It is stated that r and s both are integers and greater than 1.

To make sure that r and s are integers, the least value of s must be equal to 14 (s=14) then the least value of r becomes 12 (r=12).

Finally, the least value of (r+s) is (12+14)=26.

Answer:The area of the reduced backyard is 112.5 square feet

Step-by-step explanation:

The initial length of the backyard is 40.5 feet long.

The initial width of the backyard is 25 feet wide.

In order to install a pool, the yard needs to be reduced by a scale of 1/3. This means that the new length of the backyard is would be

40.5 × 1/3 = 40.5/3 feet lonng

The new width of the backyard would be

25 × 1/3 = 25/3 feet wide

The backyard is rectangular in shape. Area of a rectangle is length × width. The area of the reduced backyard becomes

40.5/3 × 25/3 = 1012.5/9 = 112.5 square feet

Answer:

112.5 square feet... edg2020

Answer:

0.784

Step-by-step explanation:

Given that you are  analyzing the allele frequencies for fur color in a population of squirrels where black fur is dominant to red fur.

As part of your research, you collect the following data:

Total individuals: 1,000

Red fur individuals: 216

So black fur individuals = [tex]1000-216\\=784[/tex]

p2 = proportion of black fur individuals to total individuals

= [tex]\frac{784}{1000} \\=0.784[/tex]

Final answer:

The value of p2 in the population of squirrels is calculated using the homozygous recessive genotype for red fur (q2), which is found to be 0.216. We find q by taking the square root of q2 and then calculate p as 1 - q. The value of p2 is then p squared, resulting in approximately 0.286.

Explanation:

To determine the value of p2 in the population of squirrels for the trait of fur color, we first need to understand that red fur individuals represent the homozygous recessive genotype, which is indicated by q2 in Hardy-Weinberg equations. Since the total number of red fur individuals is given as 216 out of 1,000, we can calculate q2 by dividing the number of red fur individuals by the total number of individuals, which is 216/1000 = 0.216. To find the value of q, we need to take the square root of q2, so q = sqrt(0.216). Then, according to the Hardy-Weinberg principle, we know p + q = 1. Thus, we can calculate p by subtracting q from 1. Finally, to find p2, we just square the value of p.

The calculations are as follows:

Thus, the value of p2 in this population is approximately 0.286.

Answer:

B = 53°

C = 74°

The correct option for Suppose that we know that a=5cm, b=5cm, and angle A=53o in a certain triangle. According to the Law of Sines D. There is exactly one triangle that meets the criteria.

Given:

a = 5, b = 5,  A = 53°

⇒ a/sin A = b/sin B ⇒ Sin B = Sin A

                               ⇒ B = A (or) 180-A

                               ⇒ B = 53° (or) 127°

B = 53°:

           C = 180-A-B = 0 (not possible)

    ⇒ B = 53°, C = 74° ⇒ C = (Sin C)  (b/sin B) ≅ 6.02 cm

Generally, the law of sines is used to solve the triangle, when we know two angles and one side or two angles and one included side. It means that the law of sines can be used when we have ASA (Angle-Side-Angle) or AAS (Angle-Angle-Side) criteria.

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Answer:

Marcos Should invest with the first bank

Step-by-step explanation:

Formula for finding compound interest is: A = p(1+\frac{r}{n})^{nt}

where

A = the future value of the investment

P = the principal investment amount (the initial deposit)

r = the annual interest rate (decimal)

n = the number of times that interest is compounded per unit t

t = the time the money is invested

If marcos choose to invest with the first bank

A = 15000(1+\frac{0.025}{12})^{12*3} = £16166.81

If he choose to invest with the second bank

His principal become 15570 in the first year because of the 3.8% offer from the bank and t becomes 2.

A = 15570(1+\frac{0.01}{12})^{12*2} = £15884.27

Comparing the future value of his investment from both bank, Marcos will get more interest from investing with the first bank.

Answer:

Marco should choose the first bank to get the most interest over 3 years (£1153.36)

Step-by-step explanation:

According to the question, Marco is trying to invest his savings of £15,000 in a bank for three (3) years.

Two banks presented an offer with different interest rates. Bank 1 offers 2.5% interes rate per year while Bank 2 offers 3.8% interest rate for the 1st year and 1% interest rate for subsequent years.

In order to calculate the interest amount offered by both banks, we use the formula:

I = P × R × T ÷ 100

Where P= Principal amount to be invested

R = interest rate

T= Time in years

I = Interest amount

We will calculate the interest amount for each year, hence, T is 1 for each year.

Bank 1:

For 1st year;

P= £15,000 , R= 2.5%, T=1

I = 15000 × 2.5 × 1 ÷ 100

I = 375

To get the principal amount for year 2, we add 15000 + 375 = 15375

2nd year;

P= £15,375 , R= 2.5%, T=1

I = 15375 × 2.5 × 1 ÷ 100

I = 384.375

Principal amount for year3= 15375 + 384.375= 15759.38

3rd year;

P= £15,759.38 , R= 2.5%, T=1

I = 15759.38 × 2.5 × 1 ÷ 100

I = 393.98

Amount for three years = 15759.38 + 393.98= £16153.36

Hence, for the first bank, a total amount of £16153.36 was realized after three years with a total interest amount of £16153.36 - £15000 = £1153.36

Bank 2:

For 1st year;

P= £15,000 , R= 3.8%, T=1

I = 15000 × 3.8 × 1 ÷ 100

I = 570

To get the principal amount for year 2, we add 15000 + 570= 15570

N.B: The interest rate has been reduced for following years

2nd year;

P= £15,570 , R= 1%, T=1

I = 15570 × 1 × 1 ÷ 100

I = 155.7

Principal amount for year3= 15570 + 155.7 = 15725.7

3rd year;

P= £15,725.7 , R= 1%, T=1

I = 15725.7 × 1 × 1 ÷ 100

I = 157.257

Amount for three years = 15725.7 + 157.257 = £15882.95

Hence, for the second bank, a total amount of £15,882.95 was realized after three years with a total interest amount of £15882.95 - £15000 = £882.95

The interest amount of Bank 1 (£1153.36) after three years of investing £15000 will be more than the interest amount (£882.95) of Bank2 after investing the same amount for 3 years. Hence, Marco should choose Bank 1 to invest his savings.

Answer:

  2880

Step-by-step explanation:

Sunnyside has 3 of every 4 books, so has ...

  (3/4)(3840) = 2880 . . . books

Answer:

Random

Step-by-step explanation:

The sampling technique used in this scenario is A) cluster sampling.

Cluster sampling is a method where the population is divided into clusters or groups, and a random sample of these clusters is selected for analysis.

In this case, the population consists of 20 statistics classes at the local community college.

Instead of selecting individual students, the clusters (classes) are randomly selected.

Once the clusters are chosen, all the students from each selected class are interviewed.

This approach is different from other sampling techniques because it focuses on sampling groups rather than individuals within the population.

Hence, the most appropriate sampling technique in this scenario is cluster sampling (option A), where the classes were randomly selected as clusters, and all the students within each selected class were interviewed.

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Answer: On the 29th day

Step-by-step explanation:

According to this problem, no lilypad dies and the lilypads always reproduce, so we can apply the following reasoning.

On the first day there is only 1 lilypad in the pond. On the second day, the lilypad from the first reproduces, so there are 2 lilypads. On day 3, the 2 lilypads from the second day reproduce, so there are 2×2=4 lilypads. Similarly, on day 4 there are 8 lilypads. Following this pattern, on day 30 there are 2×N lilypads, where N is the number of lilypads on day 29.

The pond is full on the 30th day, when there are 2×N lilypads, so it is half-full when it has N lilypads, that is, on the 29th day. Actually, there are [tex]2^{30} [/tex] lilypads on the 30th, and [tex]2^{29}[/tex] lilypads on the 29th. This can be deduced multiplying succesively by 2.  

Answer:

[tex]z=\frac{395.2-400}{\frac{8}{\sqrt{16}}}=-2.4[/tex]  

[tex]p_v =2*P(Z<-2.4)=0.0164[/tex]  

If we compare the p value and the significance level given [tex]\alpha=0.05[/tex] we see that [tex]p_v<\alpha[/tex] so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is significantly different from 400.  

[tex]395.2-1.96\frac{8}{\sqrt{16}}=391.28[/tex]    

[tex]395.2+1.96\frac{8}{\sqrt{16}}=399.12[/tex]

So on this case the 95% confidence interval would be given by (391.28;399.12)

Since the confidence interval not contains the value of 400 we can conclude that the true mean is different from 400 at 5% of significance.      

Step-by-step explanation:

1) Data given and notation  

[tex]\bar X=395.2[/tex] represent the sample mean  

[tex]\sigma=8[/tex] represent the population standard deviation  

[tex]n=16[/tex] sample size  

[tex]\mu_o =7.3[/tex] represent the value that we want to test  

[tex]\alpha=0.05[/tex] represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

[tex]p_v[/tex] represent the p value for the test (variable of interest)  

2) State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean pressure is different from 400, the system of hypothesis are :  

Null hypothesis:[tex]\mu = 400[/tex]  

Alternative hypothesis:[tex]\mu \neq 400[/tex]  

Since we know the population deviation, is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

[tex]z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}[/tex] (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

3) Calculate the statistic  

We can replace in formula (1) the info given like this:  

[tex]z=\frac{395.2-400}{\frac{8}{\sqrt{16}}}=-2.4[/tex]  

4) P-value  

Since is a two sided test the p value would given by:  

[tex]p_v =2*P(Z<-2.4)=0.0164[/tex]  

5) Conclusion  

If we compare the p value and the significance level given [tex]\alpha=0.05[/tex] we see that [tex]p_v<\alpha[/tex] so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is significantly different from 400.  

6) Confidence interval

The confidence interval for the mean is given by the following formula:

[tex]\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}[/tex]   (1)

Since the Confidence is 0.95 or 95%, the value of [tex]\alpha=0.05[/tex] and [tex]\alpha/2 =0.025[/tex], and we can use excel, a calculator or a tabel to find the critical value. The excel command would be: "=-NORM.INV(0.025,0,1)".And we see that [tex]z_{\alpha/2}=1.96[/tex]

Now we have everything in order to replace into formula (1):

[tex]395.2-1.96\frac{8}{\sqrt{16}}=391.28[/tex]    

[tex]395.2+1.96\frac{8}{\sqrt{16}}=399.12[/tex]

So on this case the 95% confidence interval would be given by (391.28;399.12)

Since the confidence interval not contains the value of 400 we can conclude that the true mean is different from 400 at 5% of significance.      

Answer:D no correlation

Step-by-step explanation:because if you were to draw a straight line, it wouldn’t be near all of the lines

Answer:

Compatible width of rectangular banquet hall could be 90 feet approximately.

Step-by-step explanation:

Given

Area of a rectangular banquet hall = 7400 square feet

Length of rectangular banquet hall = 82 feet

We need to calculate width of the rectangular banquet hall.

Now Area of rectangle is equal to length times width.

Framing in equation form we get;

[tex]Area\ of \ Rectangle= length \times width[/tex]

Substituting the given values we get;

[tex]82 \times width = 7400\\\\width = \frac{7400}{82} = 90.2439[/tex]

Now by definition of Compatible numbers which state that:

"Compatible numbers are the numbers that are easy to add, subtract, multiply, or divide mentally.  Compatible numbers are close in value to the actual numbers that make estimating the answer and computing problems easier."

Now By Using width as 90 feet and length as 82 feet we get area as 7380 sq ft. which is closet to actual area which is 7400 sq ft.

Hence we can say compatible width could be 90 feet approximately.

Answer:

the answer is option C. 0.3(x+8,000)=0.2x+12,000

Step-by-step explanation:

Assume;

Purchase cost of car = x

Purchase cost of truck = y = 8000 + x

Selling price of truck = a =12000+b

Selling price of car = b

Since profit for truck is 30%, therefore;

a = 30%*y

a = (30/100)*y

a = 0.3y

Since profit for car is 20%, therefore;

b = 20%*x

b = (20/100)*x

b = 0.2x

Now take;

A = 0.3y

12000 + b = 0.3 (8000+x)

12000 + 0.2x = 0.3(8000+x)

OR

0.3(8000+x) = 0.2x +12000

Question is Incomplete,Complete question is given Below.

Ben earns $9 per hour and $6 for each delivery he makes. he wants to earn more than $155 in an 8-hour workday. what is the least number of deliveries he must make to reach his goal?

Answer:

Ben must make at least 14 Deliveries to achieve his goal.

Step-by-step explanation:

Hourly Rate = $9 per hour

Cost of each Delivery = $6

Number of hours to be worked = 8 hours.

Money needs to be earned =$155

we need to find the number of deliveries he must make to reach his goal.

Solution :

Let number of deliveries be 'x'.

Now we can say that Hourly rate multiplied by number of hours of work plus Cost of each delivery multiplied by number of deliveries should be greater than or equal to Money needs to be earned.

Framing in equation form we get;

[tex]9\times8+6x\geq 155[/tex]

Solving the equation we get;

[tex]72+6x\geq 155[/tex]

Subtracting both side by 72 using Subtraction property of Inequality we get;

[tex]72+6x-72\geq 155-72\\\\6x\geq 83[/tex]

Now Dividing both side by 6 using Division Property we get;

[tex]\frac{6x}{6} \geq \frac{83}{6} \\\\x\geq 13.83[/tex]

Hence Ben must make at least 14 Deliveries to achieve his goal.

Answer:

6554 degres

Step-by-step explanation:

Answer:

She is absolutely correct!

Step-by-step explanation:

Let the total no. of stickers with Lena be x.

If she sticks 5 stickers per page, the number of pages she will use=[tex]\frac{x}{5}[/tex]

If she sticks 10 stickers per page, the number of pages she will use=[tex]\frac{x}{10}[/tex]

We all know, that the smaller the denominator the larger the number.

Therefore, [tex]\frac{x}{5} >\frac{x}{10}[/tex]

Condition being that x is a positive quantity which it automatically is.

So, Lena is right in her reasoning that she will use more no. of pages.

Yes, Lena is correct because placing a smaller number of stickers per page (5 instead of 10) will indeed result in the use of more pages overall, as this reduces the stickers-to-page ratio.

The question is asking if Lena will use more pages for her stickers if she places 5 stickers on a page instead of 10. We are working with a simple division concept here. When you have a fixed number of items (stickers, in this case) and you use fewer items per group (or page), you will end up with more groups (or pages).

If Lena puts 5 stickers on each page as opposed to 10 stickers on a page, she will indeed need more pages because she’s placing fewer stickers on each page. For instance, if she has 20 stickers: with 5 stickers per page, she will need 4 pages (20 stickers / 5 stickers per page = 4 pages). On the other hand, with 10 stickers per page, she will only need 2 pages (20 stickers / 10 stickers per page = 2 pages). Therefore, placing fewer stickers on a page results in more pages being used.

Answer:

[tex]10[/tex]

Step-by-step explanation:

Given that [tex]R,S,T[/tex] are mid points of the sides of the triangle [tex]ABC[/tex]

Perimeter of [tex]\Delta ABC=AB+AC+BC=20[/tex]

In the [tex]\Delta ARS\ and\ \Delta ABC[/tex]

[tex]\frac{AR}{AB}=\frac{1}{2} \ \ (as\ R\ is\ mid\ point\ of\ AB)[/tex]

[tex]\frac{AS}{AC}=\frac{1}{2} \ \ (as\ S\ is\ mid\ point\ of\ AC)[/tex]

[tex]\angle A=\angle A[/tex]

from [tex]SAS[/tex] these two triangles are similar

Hence

[tex]\frac{RS}{BC}=\frac{AR}{AB}=\frac{AS}{AC}=\frac{1}{2}[/tex]

[tex]RS=\frac{BC}{2}[/tex]

Similarly [tex]RT=\frac{AC}{2}\ and\ ST=\frac{AB}{2}[/tex]

[tex]Perimeter\ of \ \Delta RST=RS+ST+RT\\\\=\frac{BC}{2}+\frac{AR}{2}+\frac{AC}{2}   \\\\=\frac{AB+AC+BC}{2}\\\\=\frac{20}{2}\\\\ =10[/tex]

Answer:

[tex]z=\frac{0.0973 -0.1}{\sqrt{\frac{0.1(1-0.1)}{298}}}=-0.155[/tex]  

[tex]p_v =2*P(Z<-0.155)=0.877[/tex]  

And we can use excel to find the p value like this: "=2*NORM.DIST(-0.155;0;1;TRUE)"

So the p value obtained was a very high value and using the significance level given [tex]\alpha=0.05[/tex] we have [tex]p_v>\alpha[/tex] so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the proportion of interest is not significantly different from 0.1 .  

Step-by-step explanation:

1) Data given and notation

n=298 represent the random sample taken

X=29 represent the events claimed

[tex]\hat p=\frac{29}{298}=0.0973[/tex] estimated proportion

[tex]p_o=0.1[/tex] is the value that we want to test

[tex]\alpha=0.05[/tex] represent the significance level

Confidence=95% or 0.95

z would represent the statistic (variable of interest)

[tex]p_v[/tex] represent the p value (variable of interest)  

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the proportion is 0.1 or no.:  

Null hypothesis:[tex]p=0.1[/tex]  

Alternative hypothesis:[tex]p \neq 0.1[/tex]  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

[tex]z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}[/tex] (1)  

The One-Sample Proportion Test is used to assess whether a population proportion [tex]\hat p[/tex] is significantly different from a hypothesized value [tex]p_o[/tex].

3) Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

[tex]z=\frac{0.0973 -0.1}{\sqrt{\frac{0.1(1-0.1)}{298}}}=-0.155[/tex]  

4) Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The next step would be calculate the p value for this test.  

Since is a bilateral test the p value would be:  

[tex]p_v =2*P(Z<-0.155)=0.877[/tex]  

And we can use excel to find the p value like this: "=2*NORM.DIST(-0.155;0;1;TRUE)"

So the p value obtained was a very high value and using the significance level given [tex]\alpha=0.05[/tex] we have [tex]p_v>\alpha[/tex] so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% of significance the proportion of interest is not significantly different from 0.1 .  

We can do the test also in R with the following code:

> prop.test(29,298,p=0.1,alternative = c("two.sided"),conf.level = 1-0.05,correct = FALSE)

Answer:

  60 m, 61 m

Step-by-step explanation:

If "a" and "b" represent the lengths of the sides adjacent to the right angle, the area is ...

  area = (1/2)ab

Filling in the given information, we can find the other side to be ...

  330 m² = (1/2)(11 m)b

  60 m = b  . . . . . . divide by the coefficient of b

Then the remaining side can be found from the Pythagorean theorem:

  c² = a² + b² = 11²  + 60² = 3721

  c = √3721 = 61 . . . meters

The lengths of the other two sides are 60 m and 61 m.

Answer:

New dimensions of the floor is approximately 301.25 ft by 181.25 ft

Step-by-step explanation:

The question is incomplete. The complete question should be:

Manufacture wants to enlarger it's floor area 1.5 times that of the current facility. The current facility is 260 ft by 140 ft. The manufacture wants to increase each dimension the same amount. Write the dimensions of the new floor.

Given:

Length of floor = 260 ft

Width of floor = 140 ft

The floor area is increased 1.5 times.

To find the new dimensions of the floor.

Solution:

Original area of the floor = [tex]length\times width= 260\times 140=36400\ ft^2[/tex]

New area = [tex]1.5\times Original\ Area = 1.5\times 36,400=54,600\ ft^2[/tex]

Let the length and width be increased by [tex]x[/tex] ft.

Thus, new length = [tex](260+x)\ ft[/tex]

New width = [tex](140+x)\ ft[/tex]

Area of the new floor can be given as:

⇒ [tex]new\ length\times new\ width[/tex]

⇒ [tex](260+x)(140+x)[/tex]

Multiplying using distribution.

⇒ [tex]x^2+260x+140x+36400[/tex]

⇒ [tex]x^2+400x+36400[/tex]

Thus we can equate this with new area to get the equation to find [tex]x[/tex]

[tex]x^2+400x+36400=54600[/tex]

subtracting both sides by 54600.

[tex]x^2+400x+36400-54600=54600-54600[/tex]

[tex]x^2+400x+18200=0[/tex]

Using quadratic formula:

For a quadratic equation [tex]ax^2+bx+c=0[/tex]

[tex]x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]

For the equation [tex]x^2+400x-18200=0[/tex]

[tex]x=\frac{-400\pm\sqrt{(400)^2-4(1)(-18200)}}{2(1)}[/tex]

[tex]x=\frac{-400\pm\sqrt{232800)}}{2}[/tex]

[tex]x=\frac{-400\pm482.49}{2}[/tex]

[tex]x=\frac{-400+482.49}{2} \ and\ x= \frac{-400-482.49}{2}[/tex]

∴ [tex]x\approx 41.25 \ and\ x\approx-441.25[/tex]

Since length is being increased, so we take [tex]x\approx41.25[/tex]

New dimensions are:

New length [tex]\approx 260\ ft + 41.25\ ft =301.25\ ft[/tex]

New width [tex]\approx 140\ ft + 41.25\ ft =181.25\ ft[/tex]

Answer:

 Roni did not make use of the equation for a proportional relationship.

Step-by-step explanation:

For some constant of proportionality k, y is proportional to x if x and y satisfy the equation ...

  y = kx

Roni knows k=7/25, but she did not use this equation. She added instead of multiplying, so did not end with an equation expressing a proportional relation.

___

  y = (7/25)x

Answer:

The Company made 6 Bradley hats and 12 Karli hats.

Step-by-step explanation:

Given,

Total Amount of leather = 100 yards

Total number of hats = 19

Solution,

Let the number of Bradley hat be x.

And also let the number of Karli hat be y.

Total number of hats = 19

[tex]\therefore x+y=19\ \ \ \ \ equation\ 1[/tex]

Now, Bradly hats requires 4 yards and Karli hats requires 6 yards of leather.

So framing the above sentence in equation form, we get;

[tex]4x+6y=100\ \ \ \ \ equation\ 2[/tex]

Now, multiplying equation 1 by 4, we get;

[tex]4(x+y)=19\times4\\\\4x+4y=76\ \ \ \ \ equation\ 3[/tex]

Now we subtract equation 3 from equation 2, we get;

[tex](4x+6y)-(4x+6y)=100-76\\\\4x+6y-4x-4y=24\\\\2y=24\\\\y=\frac{24}{2}=12[/tex]

[tex]y=12[/tex]

On substituting the value of y in equation 1, we get the value of x.

[tex]x+y=19\\\\x+12=19\\\\x=19-12=6[/tex]

Hence The Company made 6 Bradley hats and 12 Karli hats.

Answer:

The probability of a successful event is the ratio of the number of successful events to the total number of events. In this case, a successful event is selecting a red marble from the box. The total number of events is the total number of marbles in the box:

Red marbles/Total number of marbles

4/12 divide

=1/3

The probability of her selecting a red marble is 1/3

The distribution of the marbles is given as:

Red = 4

Green = 8

The probability of selecting a red marble is:

P(Red) =Red/Total

So, we have:

P(Red) = 4/(4 + 8)

Evaluate

P(Red) = 1/3

Hence, the probability of her selecting a red marble is 1/3

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Answer:

the answer is closest to option d) $2800

Step-by-step explanation:

Assume,

Cost per square meter = y = 92$

Step 1:

For Sphere 1:

Circumference = C1 = 5.5 m

Formula for Circumference is;

C = 6.2832(R)

Where R = radius of sphere

Therefore for radius;

C1 = 6.2832(R1)

5.5 = 6.2832(R1)

R1 = 5.5/6.2832

R1 = 0.87 m

Formula for Area;

A1 = 4π(R1)²

Since,  

π = 3.14

Therefore;

A1 = 4*3.14*(0.87)²

A1 = 9.51 m²

Cost of finishing for sphere 1 will be;

X1 = 92*A1

X1 = 92*9.51

X1 = $875

Step 2:

For Sphere 2:

Circumference = C2 = 7.85 m

Formula for Circumference is;

C = 6.2832(R)

Where R = radius of sphere

Therefore for radius;

C2 = 6.2832(R2)

7.85 = 6.2832(R2)

R2 = 7.85/6.2832

R2 = 1.25 m

Formula for Area;

A1 = 4π(R2)²

Since,  

π = 3.14

Therefore;

A1 = 4*3.14*(1.25)²

A1 = 19.63 m²

Cost of finishing for sphere 1 will be;

X2 = 92*A2

X2 = 92*19.63

X2 = $1,806

Step 3:

Now for total cost;

X = X1 + X2

X = 875 + 1806

X = $2,681

Answer:

Step-by-step explanation:

The diagram of triangle AMK is shown on the attached photo. To determine AM, we would apply trigonometric ratio since triangle AMP is a right angle triangle.

Sin# = opposite/hypotenuse

Sin 72 = 10/AM

AMSin72 = 10

AM = 10/Sin72 = 10/0.9511

AM = 10.51

To determine MK,

Cos# = adjacent/hypotenuse

Cos 50 = 10/MK

MKCos50 = 10

MK = 10/Cos50 = 10/0.6428

MK = 15.6

AK = AP + KP

Tan# = opposite/adjacent

Tan 72 = 10/AP

AP tan 72 = 10

AP =10/tan72 = 10/ 3.0777 = 3.25

Tan 50 = KP/10

KP = 10tan50

KP= 10× 1.1918 = 11.918

Therefore,

AK = 3.25 + 11.918 = 15.168

To find AM, MK, and AK in triangle AMK, use trigonometry and given angle measurements. Subtract the measure of angle PMK from 180 degrees to find the measure of angle A. Then, use the sine rule to find AK and AM.

To find the lengths of AM, MK, and AK, we can use trigonometry and the given angle measurements. Firstly, we can find MK by subtracting the measure of angle PMK from 180 degrees to find the measure of angle A. Then, we can use the sine rule to find the lengths of AK and AM. Using the given information, we can set up equations and solve for the unknown lengths.

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1/2 of a mile.

Step-by-step explanation:

He has already gone 4/8 of a mile (3/8 + 1/8) and he needs to go 8/8 of a mile. 8/8 - 4/8 = 4/8. You can simplify that to 1/2.

Answer:

1/2 a mile.

Step-by-step explanation:

He wants to walk 1 mile.

Distance left = 1 - 3/8 - 1/8

= 8/8 - 3/8 - 1/8

= 8/8 - 4/8

= 4/8

= 1/2 a mile.

Answer:

4.93 =< h =< 5.77

a) 90% woman (most of them) are within the height of 4.93 and 5.77 ft

b) not unusual since it is within the range

Note: for this answer, I'll use the following symbols:

=< as less or equal

=> as more or equal

Step-by-step explanation:

The inequality is

Abs[(h-5.35)/0.21)] = < 2

The absolute value sign will causes the value in the abs() bracket to be zero, whether the value is positive or negative

In other word, (h - 5.35)/0.21 could actually be a negative or positive

We consider both possibility

If it's positive: (h - 5.35)/0.21 =< 2

If it's negative: (h - 5.35)/0.21 => -2

Note that if we consider it as negative, the inequality sign change because at negative value, the order of magnitude is inverted to positive values.

Let's consider the positive first:

(h-5.35)/0.21 =< 2

h =< 2*0.21 +5.35

h =< 5.77

And then the negative

(h - 5.35)/0.21 => -2

h => -2*0.21 + 5.35

h => 4.93

From both calculation we can see that the range value of h is

4.93 =< h =< 5.77

a) this means that 90% of woman height is between 4.93 to 5.77 feet

b) 5'99'' = 5.75 ft

The height is within the range found from this calculation. So it's not that unusual.

Answer:

?

Step-by-step explanation:

Final answer:

The slope of the line passing through the points (9, 10) and (7, 2) is 4.

Explanation:

The slope of a line is a measure of how steep the line is and can be calculated using the formula slope = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are any two different points on the line.

Given two points (9, 10) and (7, 2), we can calculate the slope by subtracting the y-coordinate of the first point from the y-coordinate of the second point, and then dividing that number by the result of subtracting the x-coordinate of the first point from the x-coordinate of the second point.

So, the slope would be calculated as follows:

Slope = (10 - 2) / (9 - 7)

Slope = 8 / 2

Slope = 4

Therefore, the slope of the line passing through the points (9, 10) and (7, 2) is 4. This means there is a rise of 4 on the vertical axis for every increase of 1 on the horizontal axis.

Answer:

  H.  13

Step-by-step explanation:

Make use of the Pythagorean theorem twice. The first time, use it to find TS. The second time, use it to find QR.

  TS² + RT² = RS²

  TS² = RS² -RT² = 64 -48 = 16 . . . . subtract RT², fill in numbers

  TS = 4 . . . . . take the square root

Now, QT = QS -TS = 15 -4 = 11, so ...

  QR² = QT² +RT²

  QR² = 11² +(4√3)² = 121 +48 = 169

  QR = √169 = 13

The length of QR is 13.