can i have some help please uwu?
use the iterative rule to find the 8th term in the sequence
an= 25-3n
a8=___
thankyou! ~bangtanboys7
Answers
hope im right but i think it 1 sorry if im wrong
Plug in 1, 2, 3, ... up to 8 into our sequence an.
You really just need to plug in 8, but plug in lower numbers to see the sequence emerge.
For example:
a1 means n equals 1, so a1 = 25 - (3 * 1) = 25 - 3 = 22
a2 means n equals 2, so a2 = 25 - (3 * 2) = 25 - 6 = 19
...
a8 means n equals 8, so a8 = 25 - (3 * 8) = 25 - 24 = 1
I hope this helps you understand the problem.
EDIT: You can also graph your iterative rule an on a graph. The values on the x axis correspond to the value of n and the y-axis would then correspond to the value of the sequence. Notice that a8 = 1, as shown in the attached picture.
Related Questions
a 34 gram sample of a substance that's used to treat thyroid disorders has a k-value of 0.137. find the substance's half-life, in days. round to the nearest tenths.
Answers
Answer:
5.1 days
Step-by-step explanation:
Given in the question,
initial amount of substance = 34 grams
k-value = 0.137
To find the half life of this substance we will use following formula
[tex]N(0)/2 = N(0)e^{-kt}[/tex]
here N(0) is initial amount of substance
t is time in days
Plug values in the formula
[tex]34 /2 = 34e^{-0.137t}[/tex]
1/2 = e^{-0.137t}
Take logarithm on both sides
ln(1/2) = ln( e^{-0.137t})
ln(1/2) = -0.137t
t = ln(1/2) / -0.137
t = 5.059
t ≈ 5.1 days (nearest to tenths)
Evaluate 3^2+(6-2)•4-6/3
Answers
Answer:
23
Step-by-step explanation:
3^2+(6-2)•4-6/3
Order of operations:
= 9 + (4)•4 - 6/3
= 9 + 16 - 2
= 25 -2
= 23
32+(6−2)(4)− 6/3
your answer is =23
32+(6−2)(4)− 6/3
=9+(6−2)(4)− 6/3
=9+(4)(4)− 6/3
=9+16− 6/3
=25− 6/3
=25−2
=23
A survey found that women's heights are normally distributed with mean 63.9 in. and standard deviation 3.6 in. The survey also found that men's heights are normally distributed with mean 69.7 in. and standard deviation 3.6 in. Consider an executive jet that seats six with a doorway height of 55.9 in. Complete parts (a) through (c) below. a. What percentage of adult men can fit through the door without bending? The percentage of men who can fit without bending is 0.02%. (Round to two decimal places as needed.) b. Does the door design with a height of 55.9 in. appear to be adequate? Why didn't the engineers design a larger door?
Answers
Using the normal distribution, it is found that:
a) The percentage of men who can fit without bending is 0.02%.
b) A very small percentage of people can fit through the door, thus the dimensions are not adequate. Possible, the engineers did not design a large door because of engineering constraints.
In a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
It measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X.Item a:
Men have mean of 69.7 in, thus [tex]\mu = 69.7[/tex]Standard deviation of 3.6 in, thus [tex]\sigma = 3.6[/tex]The proportion is the p-value of Z when X = 55.9, thus:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{55.9 - 69.7}{3.6}[/tex]
[tex]Z = -3.83[/tex]
[tex]Z = -3.8[/tex] has a p-value of 0.0002.
0.0002 x 100% = 0.02%
The percentage of men who can fit without bending is 0.02%.
Item b:
A very small percentage of people can fit through the door, thus the dimensions are not adequate. Possible, the engineers did not design a large door because of engineering constraints.
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A square pyramid and a cone have the same base area. The volume of the cone is 100cm^3 , and the height of the cone is 15 cm. The height of the square pyramid is 24 cm. Find the volume of the square pyramid to the nearest whole unit.
Answers
Answer:
160 cm³
Step-by-step explanation:
1. Calculate the base area of the cone
The volume for the volume (V) of a cone is
V = ⅓Ah
Data:
V = 100 cm³
h = 15 cm
Calculation:
100 = ⅓ A× 15
100 = 5A
A = 100/5 = 20 cm²
2. Volume of Pyramid.
The volume for the volume (V) of a square pyramid is
V = ⅓Ah
Data:
A = 20 cm²
h = 24 cm
Calculation:
V = ⅓× 20× 24 = 160 cm³
The volume of the square pyramid is 160 cm³.
Given a spherical weather balloon with a volume of 36π cubic feet. What is the diameter, in feet, of the weather balloon?
A) 3
B) 6
C) 9
D) 12
Answers
Answer:
option B [tex]D=6\ ft[/tex]
Step-by-step explanation:
we know that
The volume of the sphere is equal to
[tex]V=\frac{4}{3}\pi r^{3}[/tex]
In this problem we have
[tex]V=36\pi\ ft^{3}[/tex]
substitute and solve for r
[tex]36\pi=\frac{4}{3}\pi r^{3}[/tex]
simplify
[tex]27=r^{3}[/tex]
[tex]r=3\ ft[/tex]
Find the diameter
[tex]D=2r=2(3)=6\ ft[/tex]
Answer:
b)6
Step-by-step explanation:
Hank and Debra each one two milking cows. One day, they Milked their cows and compared the amount of milk the cows produced in that day
Answers
Answer:
it would be great if you provided a question here..!
Step-by-step explanation:
As an estimation we are told ?3 is €4. Convert €83.60 to pounds. Give your answer rounded to 2 DP.
Answers
Answer:
€83.60 = £62.70
Step-by-step explanation:
£3/€4 = £x/€ 83.60
¾ = x/83.60
Multiply each side by the lowest common denominator (4 × 83.60)
3 × 83.60 = 4x
Divide each side by 4
x = (3 × 83.60)/4 = £62.70
∴ €83.60 = £62.70
(The conversion factor is out of date. The current conversion factor is closer to £6 = €7.)
Using the given exchange rate, we set up a conversion equation and solve for the unknown variable. We find that €83.60 is roughly equivalent to 62.86 pounds.
Explanation:Based on the given exchange rate, 1 pound (£) is equivalent to 1.33 Euros (€). Therefore, to convert €83.60 to pounds, we should do the following:
Set up the conversion ratio: 1.33 €/£ = 83.60 €/x £To solve for x (the value in pounds), cross-multiply: 1.33x = 83.60Divide both sides by 1.33: x = 83.60/1.33Rounding off to two decimal places, x = 62.86 £Therefore, €83.60 is approximately equivalent to 62.86 pounds.
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A number from 8 to 15 is drawn at random. What is the probability that the number is an even number?
Answers
Answer:
The probability that the answer is an even number is 50%.
Step-by-step explanation:
There are 8 terms: 8, 9, 10, 11, 12, 13, 14, 15. Even numbers: 8, 10, 12, 14. So, 4 out of the 8 terms are even, which is equivalent to 50%.
The probability that the number is an even number is 1/2.
What is the probability?The probability is defined as the ratio of number of favourable outcomes and the the total number of possible outcome.
A number from 8 to 15 is drawn at random.
The number between 8 to 15 are 8, 9, 10, 11, 12, 13, 14, 15 = 8
Total even number = 8, 10, 12, 14 = 4
The probability that the number is an even number is;
[tex]\rm Probability =\dfrac{Total \ even \ number}{Total \ number}\\\\Probability =\dfrac{4}{8}\\\\Probability =\dfrac{1}{2}[/tex]
Hence, the probability that the number is an even number is 1/2.
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A shampoo company begins selling a new bottle of shampoo that is advertised as 25% more shampoo than the old bottle. If the new bottle holds 15 ounces of shampoo, how much did the old bottle hold?
Answers
15 - 25% = 14.47 ounces of shampoo
The original shampoo bottle held 12 ounces before the 25% increase to 15 ounces. For the tile cleanser, the percent by mass of HCl is calculated to be 14.84%. Discussions of consumer product concentrations, like laundry detergent costs per ounce, often involve linear relationships and predictive models.
The question requires understanding percent increase and how to calculate the original amount given the increased quantity. To find the original volume of the shampoo bottle before the 25% increase, we set up the equation where the original volume (V) times 1.25 (to represent the 25% increase) equals the new volume of 15 ounces:
V x 1.25 = 15 ounces
To solve for V, we divide both sides of the equation by 1.25:
V = 15 ounces / 1.25
V = 12 ounces
Therefore, the old bottle held 12 ounces of shampoo.
To address another concept related to consumer products, the question on mass percentage, namely the percent by mass of HCl in a tile cleanser, also represents a common mathematical calculation in consumer product information. The calculation is as follows:
Percent by mass = (mass of solute / total mass of solution) x 100%
Percent by mass of HCl = (135 g / (135 g + 775 g)) x 100%
Percent by mass of HCl = (135 g / 910 g) x 100%
Percent by mass of HCl = 14.84%
Thus, the bottle of tile cleanser has 14.84% by mass of HCl.
When discussing the cost per ounce of laundry detergent in different sizes, such as a 40 oz. size or a 90 oz. size, the concept of linear relationships may be explored, as well as the possibility of identifying outliers or considering the validity of predictive models like the least-squares line.
1. Collin noticed that various combinations of nickels and dimes could add up to $0.65.
Let x equal the number of nickels
Let y equal the number of dimes
What is the domain where y is a function of x and the total value is $0.65?
A. (0,1,2,3,4,5,6,7,8,9,10,11,12,13)
B. (1,2,3,4,5,6,7,8,9,10,11,12,13)
C. (0,1,3,5,7,9,11,13)
D. (1,3,5,7,9,11,13)
Answers
Answer:
Step-by-step explanation:
dimes only cannot give total ending in 5 cents
so theres at least 1 nickel
n by the same reason, no.of nickels must be odd no.
most nickels is 0.65/0.05=13
combining the above, ans is D. (1,3,5,7,9,11,13)
Answer:
The Answer Is D (1,3,5,7,9,11,13)
Step-by-step explanation:
Which polynomial function has a leading coefficient of 1, roots –2 and 7 with multiplicity 1, and root 5 with multiplicity 2?
f(x) = 2(x + 7)(x + 5)(x – 2)
f(x) = 2(x – 7)(x – 5)(x + 2)
f(x) = (x + 7)(x + 5)(x + 5)(x – 2)
f(x) = (x – 7)(x – 5)(x – 5)(x + 2)
Answers
ANSWER
[tex]f(x) = (x -7)(x - 5) {(x - 5)}(x + 2)[/tex]
EXPLANATION
If the polynomial has a root -2, with multiplicity 1, then (x+2) is a factor.
If the polynomial has root, 7 with multiplicity 1, then (x-7) is a factor.
If the polynomial has root 5, with multiplicity 2, then (x-5)² is a factor of the polynomial.
The fully factored form of the polynomial is
[tex]f(x) =a (x + 2)(x - 7) {(x - 5)}^{2} [/tex]
It was given that the polynomial has a leading coefficient of 1.
Hence a=1.
This implies that,
[tex]f(x) =(x + 2)(x - 7) {(x - 5)}^{2}[/tex]
Or
[tex]f(x) = (x -7)(x - 5) {(x - 5)}(x + 2)[/tex]
Answer:
f(x) = (x -7)(x - 5) {(x - 5)}(x + 2) the answer is D
Step-by-step explanation:
Does the function satisfy the hypotheses of the Mean Value Theorem on the given interval? f(x) = 3x2 − 4x + 1, [0, 2] Yes, it does not matter if f is continuous or differentiable, every function satifies the Mean Value Theorem. Yes, f is continuous on [0, 2] and differentiable on (0, 2) since polynomials are continuous and differentiable on double-struck R. No, f is not continuous on [0, 2]. No, f is continuous on [0, 2] but not differentiable on (0, 2). There is not enough information to verify if this function satifies the Mean Value Theorem. If it satisfies the hypotheses, find all numbers c that satisfy the conclusion of the Mean Value Theorem. (Enter your answers as a comma-separated list. If it does not satisify the hypotheses, enter DNE). c =
Answers
[tex]f(x)=3x^2-4x+1[/tex] is a polynomial and thus continuous everywhere and differentiable on any open interval. (second option)
The MVT then guarantees the existence of [tex]c\in(0,2)[/tex] such that
[tex]f'(c)=\dfrac{f(2)-f(0)}{2-0}=\dfrac{5-1}2=2[/tex]
We have
[tex]f'(x)=6x-4[/tex]
so
[tex]6c-4=2\implies6c=6\implies c=1[/tex]
The true statement is: (b) Yes, f is continuous on [0, 2] and differentiable on (0, 2) since polynomials are continuous and differentiable
Mean value theorem states that:
If [tex]\mathbf{f(x)\ is\ continuous}[/tex] [a,b] and
[tex]\mathbf{f(x)\ is\ differentiable}[/tex] on (a,b),
Then there is a point c in (a,b), such that: [tex]\mathbf{f'(c) = \frac{f(b) - f(a)}{b - a}}[/tex]
The function is given as:
[tex]\mathbf{f(x) = 3x^2 - 4x + 1}[/tex]
And the interval is: [tex]\mathbf{[0,2]}[/tex]
We have
[tex]\mathbf{f'(c) = \frac{f(b) - f(a)}{b - a}}[/tex]
This becomes
[tex]\mathbf{f'(c) = \frac{f(2) - f(0)}{2 - 0}}[/tex]
[tex]\mathbf{f'(c) = \frac{f(2) - f(0)}{2}}[/tex]
Calculate f(2) and f(0)
[tex]\mathbf{f(2) = 3\times 2^2 - 4\times 2 + 1 = 5}[/tex]
[tex]\mathbf{f(0) = 3\times 0^2 - 4\times 0 + 1 = 1}[/tex]
So, we have:
[tex]\mathbf{f'(c) = \frac{5-1}{2}}[/tex]
[tex]\mathbf{f'(c) = \frac{4}{2}}[/tex]
[tex]\mathbf{f'(c) = 2}[/tex]
Recall that:
[tex]\mathbf{f(x) = 3x^2 - 4x + 1}[/tex]
Differentiate
[tex]\mathbf{f'(x)= 6x - 4}[/tex]
Substitute c for x
[tex]\mathbf{f'(c)= 6c - 4}[/tex]
Substitute 2 for f'(c)
[tex]\mathbf{ 6c - 4 = 2}[/tex]
Collect like terms
[tex]\mathbf{ 6c = 4 + 2}[/tex]
[tex]\mathbf{ 6c = 6}[/tex]
Divide both sides by 6
[tex]\mathbf{c = 1}[/tex]
The interval is given as: [0,2]
The value of c is true for interval (0,2).
Hence, the true statement is:
(b) Yes, f is continuous on [0, 2] and differentiable on (0, 2) since polynomials are continuous and differentiable
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the area of the top face of a cube is 9 square meters. what is the volume of the cube
Answers
for a cube v=a^3, so 9^3= 729
-2(bx-5) = 16 the value of x in terms of b is the value of x when b is 3 is ????
Answers
Answer:
x = -3/bx = -1 when b=3Step-by-step explanation:
Eliminating parentheses, you get ...
-2bx +10 = 16
Subtract 10 and divide by -2b:
x = 6/(-2b)
x = -3/b
__
When b=3, you have ...
x = -3/3
x = -1
I need help with this problem
Answers
Answer:
h = 15Step-by-step explanation:
The formula of an area of a parallelogram:
[tex]A=bh[/tex]
b - side
h - height
We have b₁ = 18 and h₁ 10 and b₂ = 12.
[tex]b_1h_1=b_2h[/tex]
Substitute:
[tex]12h=(18)(10)[/tex]
[tex]12h=180[/tex] divide both sides by 12
[tex]h=15[/tex]
How do you do this problem? Simple and concise explanation please! TOP ANSWERERS!!!!
Answers
Answer:
Just B and C
Step-by-step explanation:
Reduce this to the lowest amount possible.
log(3abc/6a^2b) = 2
=================
log(c/2a) = 2
c/2a = 10^2
c = 2a * 100
c = 200a
This one is also correct.
=================
The rest are just incorrect.
There is only 1 answer that works and that is B.
C is close, but it is not correct.
D is backwards. B is the right way and D is the upside down of B.
E and F are just not the way to handle logs. Subtracting logs means division, not multiplication and not 1 log.
=================
Please answer this question, will give brainliest!
Answers
See the attached picture:
Estimate the circumference of the circle with the given radius or diameter. Use 3.14 for ?. Round to the nearest unit. (Half. 24in written inside the circle) 1. 27in. 2. 79in. 3. 1,809in. 4. 152in. Mathematics, Connexus. Rectangular prisms and volume Part 1, Math 6B, Unit 3: Geometry and Measurement.
Answers
Answer:
The perimeter of a circle can be found by using the followinfg expression
P = 2*π*r
where
π = 3.14
r = radius of the circle = half the diameter of the circle
In this case, if we are given the radius, we use
P = 2*π*r
If we are given the diameter, we use
P = 2*π*(D/2) = π*D
1) 27in
radius = 27in
P = 2*(3.14)*(27 in) = 169.56 in
diameter = 27 in
P = (3.14)*(27 in) = 84.78 in
2) 79 in
radius = 79 in
P = 2*(3.14)*(79 in) = 496.12 in
diameter = 79 in
P = (3.14)*(79 in) = 248.06 in
3) 1809 in
radius = 1809 in
P = 2*(3.14)*(1809 in) = 11360.52 in
diameter = 1809 in
P = (3.14)*(1809 in) = 5680.26 in
4) 152 in
radius = 152 in
P = 2*(3.14)*(152 in) = 954.56 in
diameter = 152 in
P = (3.14)*(152 in) = 477.28 in
Answer:
no
Step-by-step explanation:
Solve for y.
xy + p = 5
Answers
The value of y for the equation [tex]xy + p = 5[/tex].
What is equation?An equation is a statement of equality between two mathematical expressions containing one or more variables.
According to the given question.
We have a equation
[tex]xy + p = 5[/tex]
Solve the above the equation for y
[tex]xy +p - p = 5 -p[/tex] ( subtracting p both the sides)
[tex]\implies xy = 5-p[/tex]
[tex]\implies \frac{xy}{x} = \frac{5-p}{x}[/tex] (dividing both the sides by x)
[tex]\implies y = \frac{5-p}{x}[/tex]
Therefore, the value of y for the equation [tex]xy + p = 5[/tex].
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Which expression is equivalent to the fraction below?
5/8
A. 8 5
B. 8 • 8
C. 8 - 5
D. 8 + 5
E. 5 8
F. 5 • 5
Answers
5/8=expression is equivalent to
5 8
my mom tell me this its E oksy
the graph shows that lisa's earnings are proportional to the number of hours that she works.This relationship can be represented by an equation in the form y = kx. what is the value of k in the equation?
Answers
c. 25 because she gets $25 per hour
Please help, thanks a lot! :)
Match the stem and leaf plot to the correct set of data.
A.) 17, 17, 13, 28, 28, 26, 37, 35
B.) 7, 7, 3, 8, 8, 6, 7, 5
C.) 1.3, 1.7, 1.7, 2.6, 2.8, 2.8, 3.5, 3.7
D.) 1.3, 1.7, 1.7, 2.6, 2.8, 2.8, 3.5, 3.7, 3.7
Answers
Answer:
I believe the answer is A. 17, 17, 13, 28, 28, 26, 37, 35
The answer is C.
The stem, shows the number before the decimal point. The higher the number, the longer the stem goes down.
The leaf, shows the number after the decimal point. Each leaf is added to a row to match the stem of the original number.
1.3, 1.7, 1.7 all have a "1" before the decimal so they all go in the same row like this:
1 | 3 7 7
If we keep doing this, we see that C is the correct answer.
Best of Luck!
PLsss help 15 points!
In the figure below, △ABC ~ △PQR. If the Area of △ABC is 40 cm2, what is the area of △PQR? show your work.
Answers
Answer:
90 square cm.
Step-by-step explanation:
For similar figures, the length of corresponding sides are proportional.
So we can write 4k = 6 where k is the proportionality constant.
Note: In terms of area, the scale factor would be k^2 and in terms of volume, it would be k^3y
Solving 4k = 6, we see that k = 6/4 or 3/2
We need area, so we multiply area of ABC by k^2 to get area of PQR.
[tex]40(\frac{3}{2})^2\\=40(\frac{9}{4})\\=90[/tex]
Area of PQR = 90 cm^2
Answer:
The area of △PQR is [tex]90\ cm^{2}[/tex]
Step-by-step explanation:
step 1
Find the scale factor
we know that
If two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor
so
Let
z-----> the scale factor
x---> the corresponding side triangle PQR
y---> the corresponding side triangle ABC
[tex]z=\frac{x}{y}[/tex]
substitute the values
[tex]z=\frac{6}{4}=1.5[/tex]
step 2
Find the area of triangle PQR
we know that
If two figures are similar, then the ratio of its areas is equal to the scale factor squared
so
Let
z-----> the scale factor
x---> the area of triangle PQR
y---> the area of triangle ABC
[tex]z^{2} =\frac{x}{y}[/tex]
we have
[tex]z=1.5[/tex]
[tex]y=40\ cm^{2}[/tex]
substitute the values
[tex]1.5^{2} =\frac{x}{40}[/tex]
[tex]x=40(1.5^{2})=90\ cm^{2}[/tex]
Kendra's credit card is stolen. She calls the credit card company to report it and the company says there are three large purchases on her card. She tells the company she did not make those purchases. Why does the credit card company tell her she is only responsible for $50.00 of those charges?
A. Federal law regulates a consumer's liability for fraudulent charges.
B. Credit card companies do not penalize consumers in cases of fraud.
C. Credit card companies know when charges are not made by the consumer.
D. Federal law states that credit card companies must collect that amount from consumers.
Answers
Answer:
A
Step-by-step explanation:
Federal law regulates a consumer's liability for fraudulent charges. Is what I got.
Answer:
A. Federal law regulates a consumer's liability for fraudulent charges.
Step-by-step explanation:
Under FCBA rules if a client reports about the lost cred card befor eit is used by someone else then the owner of the card is not responsible for any charges. As per the rule Card holders liability for unauthorised use of their credit card ends at $50. FCBA is a federal law that was framed in 1974 and allows us to dispute charges and temporarily withhold payment without affecting credit score. It is because of FCBA that she would not be charges more than fifty dollars.
According to the Substitution Property of Equality: If y = -5 and 7x + y = 11, then _______ . Question 9 options: 7(-5) + y = 11 7x - 5 = 11 7x + 5 = 11 -5 + y = 11
Answers
Answer:
7x - 5 = 11
Step-by-step explanation:
To solve for x, substitute y = -5 into the equation 7x + y = 11.
This becomes 7x + (-5) = 11 or 7x - 5 = 11.
The Garcia family started the day with 2 gallons of milk. They drank 1 quart of milk for breakfast and 3 pints for lunch.How many pints of milk did the Garcia family have left after lunch.
Answers
Answer:
11 pt
Step-by-step explanation:
Convert all volumes to pints
Starting volume
2 gal × 4 qt/1 gal = 8 qt
8 qt × 2 pt/1 qt = 16 pt
Breakfast
1 qt × 2 pt/1 qt = 2 pt
Stating volume = 16 pt
Less breakfast = -2 pt
Less lunch = -3 pt
After lunch = 11 pt
The Garcia family had 11 pt of milk left after lunch.
While flying an aircraft, a pilot looks out to the horizon. The altitude of the plane is 9.4 km. Earth has an average radius of about 6378 km. How far away is the horizon to the nearest tenth of a kilometer?
Answers
Answer:
6387 km
Step-by-step explanation:
6378 km -9.4 km =
6386.6 km
Round to the nearest tenth: 63787 km
Hope I helped, sorry if not tho
It appears that people who are mildly obese are less active than leaner people. One study looked at the average number of minutes per day that people spend standing or walking. Among mildly obese people, the mean number of minutes of daily activity (standing or walking) is approximately Normally distributed with mean 371 minutes and standard deviation 65 minutes. The mean number of minutes of daily activity for lean people is approximately Normally distributed with mean 528 minutes and standard deviation 108 minutes. A researcher records the minutes of activity for an SRS of 6 mildly obese people and an SRS of 6 lean people.Use z-scores rounded to two decimal places to answer the following:What is the probability (Image for It appears that people who are mildly obese are less active than leaner people. One study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes? What is the probability (Image for It appears that people who are mildly obese are less active than leaner people. One study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes?
Answers
Answer:
0.0322; 0.9929
Step-by-step explanation:
Since the data is normally distributed, we use z scores for these probabilities.
The formula for a z score of a sample mean is
[tex]z=\frac{\bar{X}-\mu}{\sigma \div \sqrt{n}}[/tex]
For the sample of mildly obese people, the mean, μ, is 371; the standard deviation, σ, is 65; and the sample size, n, is 6.
Using 420 for X,
z = (420-371)/(65÷√6) = 49/(65÷2.4495) = 49/26.5360 ≈ 1.85
Using a z table, we see that the area under the curve to the left of this is 0.9678. However, we want the area to the right, so we subtract from 1:
1-0.9678 = 0.0322
For the sample of lean people, the mean, μ, is 528; the standard deviation, σ, is 108; the sample size, n, is 6.
Using 420 for X, we have
z = (420-528)/(108÷√6) = -108/(108÷2.4495) = -108/44.0906 ≈ -2.45
Using a z table, we see that the area under the curve to the left of this is 0.0071. We want the area under the curve to the right, so we subtract from 1:
1-0.0071 = 0.9929
The probability that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes is about 3.2%. For the 6 lean people, this probability is approximately 0.7%.
Explanation:For this type of problems, we use the concept of z-scores in statistics. The z-score is a measure of how many standard deviations a data point is from the mean. In this case, we will first calculate the standard error by dividing the standard deviation by the square root of sample size and then find the z-score by dividing the value of interest (420 minutes) minus mean by the standard error.
For mildly obese people, mean = 371 min, standard deviation = 65 min, sample size = 6. So, standard error = 65/sqrt(6) ≈26.51. The z-score for 420 min = (420-371)/ 26.51 ≈1.85. This indicates 420 minutes is 1.85 standard deviations above the mean. The probability that z-score exceeds 1.85 (assuming a one-tailed test since we are looking for the mean to be more than 420 minutes) is 0.032 (approximately). Hence, the probability that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes is about 0.032 or 3.2%.
For lean people, mean = 528 min, standard deviation = 108 min, sample size = 6. Using the same approach, standard error = 44.11. The z-score for 420 min = (420-528)/44.11 ≈-2.45. This indicates 420 minutes is 2.45 standard deviations below the mean. The probability that z-score is less than -2.45 (assuming a one-tailed test for under 420 minutes) will be more than 99%. The probability that z-score exceeds -2.45 (420 min or more time) is about 1 - 0.993 = 0.007. Hence, the probability that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes is about 0.007 or 0.7%.
Learn more about Probability with z-scores here:https://brainly.com/question/33893818
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Tell which statement is the best estimate for the division problem 185 divide 61
Answers
Answer:
whichever is closest to 3.032787
plz help me
The table shows the change in the annual sales turnover of a company in millions of dollars, S(x), where x represents the years since the company was founded.
x S(x)
1 $495
3 $598.95
5 $724.73
7 $876.92
9 $1,061.08
What is the predicted average rate of change of the company's sales turnover, in millions of dollars, over the interval [9, 11]?
A.
$184.15 per year
B.
$111.42 per year
C.
$222.83 per year
D.
$92.08 per year
Answers
Answer:
its going to be d
Step-by-step explanation:
Answer:
The correct option is B.
Step-by-step explanation:
The general exponential regression model is
[tex]y=ab^x[/tex]
Using regression tool the exponential regression model for the given data is
[tex]S(x)=449.9999(1.09999)^x[/tex]
[tex]S(x)=450(1.1)^x[/tex]
The value of function at x=9 is
[tex]S(9)=450(1.1)^9=1061.07646[/tex]
The value of function at x=11 is
[tex]S(11)=450(1.1)^{11}=1283.90252[/tex]
The average rate of change of the company's sales turnover, in millions of dollars, over the interval [9, 11] is
[tex]m=\frac{S(11)-S(9)}{11-9}[/tex]
[tex]m=\frac{1283.90252-1061.07646-}{2}=111.413\approx 11.42[/tex]
The average rate of change of the company's sales turnover, in millions of dollars, over the interval [9, 11] is 11.42. Therefore the correct option is B.