Answer:
a) a continuous random variable; b) a discrete random variable; c) not a random variable; d) a discrete random variable; e) a discrete random variable; f) a discrete random variable
Step-by-step explanation:
A continuous random variable is one that can take multiple values between whole number values; for instance, fractions and decimals. Snowfall is a continuous random variable.
A discrete random variable is one that can only take whole number values. The number of bald eagles, the number of students reading a book, the number of people with blood type A, and the number of points scored in a basketball game are discrete random variables.
Gender of students is not a numerical value; this is not a random variable.
Here, we are required to determine whether the value a list of data sets are, discrete random variable, continuous random variable, or not a random variable.
Options B, D, E and F are examples of discrete random variable values.Option A is an example of a continuous random variable value.Option C is an example of a non-random variable value.First, it is important to know the characteristics of each type of value as follows;
A discrete random variable is one which usually (although not necessarily) are counts. The statement above means they may take on only a countable number of distinct values such as 0,1,2,3, and on. Put simply, they can take only a finite number of distinct values. Distinct in this case means whole number values. Examples are as follows;The number of bald eagles in a countryThe number of statistics students now reading a bookThe number of people with blood type A in a random sample of 18 peopleThe number of points scored during a basketball game
2. A continuous random variable is one which has an infinite number of possible values. This means that the value of a continuous variable is usually associated with fractions of whole numbers, i.e continuous random variables are used majorly for measurements such as length, height and so on. An example from the question above is;
The amount of snowfall in December in City3. A non-random variable is one whose values are definite. An example from above is;
The gender of college studentsRead more:
https://brainly.com/question/17751843
what is the solution to the equation below?
x - |-20| = |-34|
a· -54
b· -14
c· 14
d· 54
[tex]x - |-20| = |-34|\\x-20=34\\x=54[/tex]
A picture measuring 4" high by 6" wide is to be enlarged so that the width is now 9”. How tall will the picture be?
The original width was 6 inches, the new width is 9 inches.
Divide the new width by the original width to find the scale factor:
9/6 = 1.5
Now multiply the original height by the scale factor to find the new height:
4 x 1.5 = 6 inches.
Solve for x in the given interval.
sec x= -2√3/3, for π/2 ≤x≤π
Answer:
b. [tex]x=\frac{5\pi}{6}[/tex]
Step-by-step explanation:
The given function is
[tex]\sec x=-\frac{2\sqrt{3} }{3},\:\:for\:\:\frac{\pi}{2}\le x \le \pi[/tex]
Recall that the reciprocal of the cosine ratio is the secant ratio.
This implies that;
[tex]\frac{1}{\cos x}=-\frac{2\sqrt{3} }{3}[/tex]
[tex]\Rightarrow \cos x=-\frac{3}{2\sqrt{3} }[/tex]
[tex]\Rightarrow \cos x=-\frac{\sqrt{3}}{2}[/tex]
We take the inverse cosine of both sides to obtain;
[tex]x=\cos^{-1}(-\frac{\sqrt{3}}{2})[/tex]
[tex]x=\frac{5\pi}{6}[/tex]
Estimate the limit, if it exists.
Answer:
0
Step-by-step explanation:
The given limit is
[tex]\lim_{x \to \infty} \frac{x^2+x-22}{4x^3- 13}[/tex]
Divide both the numerator and the denominator by the highest power of x in the denominator.
[tex]=\lim_{x \to \infty} \frac{\frac{x^2}{x^3}+\frac{x}{x^3}-\frac{22}{x^3}}{\frac{4x^3}{x^3}- \frac{13}{x^3}}[/tex]
This simplifies to;
[tex]=\lim_{x \to \infty} \frac{\frac{1}{x}+\frac{1}{x^2}-\frac{22}{x^3}}{4- \frac{13}{x^3}}[/tex]
As [tex]x\to \infty, \frac{c}{x^n} \to 0[/tex]
[tex]=\lim_{x \to \infty} \frac{0+0-0}{4- 0}=0[/tex]
The limit is zero
PLZZZZZZ NEED HELP!!!!!!!!
ANSWER
5.5
EXPLANATION
We can use the cosine rule to find the missing side length.
The cosine rule is given as;
[tex] {a}^{2} = {b}^{2} + {c}^{2} - 2bc \cos( A) [/tex]
Let the missing side be "a".
Then,
[tex] {a}^{2} = {9}^{2} + {6}^{2} - 2 \times 9 \times 6 \cos(37 \degree) [/tex]
[tex] {a}^{2} = 81+ 36- 86.253[/tex]
[tex] {a}^{2} = 30.74736[/tex]
[tex]a = \sqrt{30.747} [/tex]
[tex]a \approx5.5[/tex]
Therefore the missing side length is approximately 5.5 units to the nearest tenth.
PLEASE HELP QUICK AND EXPLAIN. I'M OFFERING 20PTS (More than it's worth) AND BRAINLIEST ANSWSER
Answer:
Step-by-step explanation:
(a) when there is a negative in front of the leading coefficient (- x^2), that is a reflection over the x axis. a regular parabola opens up. In this case, the negative in front of the first term makes it open downward.
-f(x) is a reflection so -2x^2 would open downward.
(b) the vertex of the parabola is -b/2a
in this problem a x^2 + bx + c = y
-2x^2 + 4x + 3 = y
a = -2, b = 4, c = 3
formula for vertex -b/2a = -4/2(-2) = -4/-4 = 1 This is the x-value of the vertex. Plug back into original equation to find the y value.
(1, ?) -2(1)^2 + 4(1) + 3 = 5
vertex is (1,5) and is above the x axis
The length of a rectangular field is 7 m less than 4 times the width. The perimeter is 136m ?. Find the width and the length of the rectangle
➷ The perimeter is the total of all the lengths / widths
The lengths can be represented by 4x - 7
The width can be represented by x
2 times the length + 2 times the width would equal the perimeter
2(x) + 2(4x - 7) = 136
Simplify:
2x + 8x - 14 = 136
10x - 14 = 136
Add 14 to both sides:
10x = 150
Divide both sides by 10:
x = 15
The width is equal to 15m
The length is 4(15) - 7 = 53m
✽➶ Hope This Helps You!
➶ Good Luck (:
➶ Have A Great Day ^-^
↬ ʜᴀɴɴᴀʜ ♡
Ms. Thomas buys 3 pounds of sliced ham to make sandwiches. It takes 1 3 lb of ham for each sandwich. How many ham sandwiches can Ms. Thomas make with the ham she's purchased? A) 3 sandwiches B) 6 sandwiches C) 9 sandwiches D) 12 sandwiches
Answer:
Option C [tex]9\ sandwiches[/tex]
Step-by-step explanation:
we know that
using proportion
[tex]\frac{1}{(1/3)}\frac{sandwich}{pounds}=\frac{x}{3}\frac{sandwiches}{pounds}\\ \\x=3*3\\ \\x=9\ sandwiches[/tex]
Answer:
9
Step-by-step explanation:
I got the answer from USATestprep
I need help on #20 please
Answer:
P = 10x³ + 4x² + 8x + 6
Step-by-step explanation:
The perimeter of a rectangle is twice the sum of length and width.
P = 2(L+W) = 2((x³ +2x² -6x +12) +(4x³ +10x -9))
= 2(5x³ +2x² +4x +3) . . . . collect terms inside parentheses
P = 10x³ +4x² +8x +6
A cylinder with a radius of 1 cm and a height of 21 cm has the same volume as a cone with a height of 7 cm. What is the radius of the cone? A) 3 cm B) 5 cm C) 7 cm D) 9 cm
Answer:
A) 3 cmStep-by-step explanation:
The formula of a volume of a cylinder:
[tex]V=\pi r^2H[/tex]
r - radius
H - height
We have r = 1cm and H = 21cm. Substitute:
[tex]V=\pi(1^2)(21)=21\pi\ cm^3[/tex]
The formula of a cone:
[tex]V=\dfrac{1}{3}\pi r^2H[/tex]
r - radius
H - height
We have V = 21π cm³ and H = 7cm. Substitute:
[tex]\dfrac{1}{3}\pi(r^2)(7)=21\pi[/tex] divide both sides by π
[tex]\dfrac{1}{3}(7)(r^2)=21[/tex] divide both sides by 7
[tex]\dfrac{1}{3}r^2=3[/tex] multiply both sides by 3
[tex]r^2=9\to r=\sqrt9\\\\r=3\ cm[/tex]
Answer:
A 3cm
Step-by-step explanation:
PLEASE HELP!! TIMED QUESTION!!!!
Solve the system of equations below.
4x -y=16
2x + 3y = -2
A. (5,4)
B. (5,-4)
C. (4,-5)
D. (-5,4)
[tex]\begin{cases}4x - y = 16 \\2x + 3y = - 2 \end{cases} \\ \Leftrightarrow \begin{cases}4x - y = 16 \\4x + 6y = - 4 \end{cases} \\ \Leftrightarrow \begin{cases}x = \frac{y + 16}{4} \\7y = - 20 \end{cases} \\ \Leftrightarrow \begin{cases}x = \frac{23}{7} \\y = - \frac{20}{7} \end{cases}[/tex]
Maybe you wrote the system wrong somewhere because there is no right answer
Use the laws of logarithms and the values given below to evaluate the logarithmic expression (picture provided)
Answer: option b.
Step-by-step explanation:
To solve the given exercise, you must keep on mind the following law of logaritms:
[tex]m*log(a)=log(a)^m[/tex]
Descompose 8 into its prime factors:
[tex]8=2*2*2=2^3[/tex]
Therefore, you can rewrite the expression given, as following:
[tex]log8=log2^3=3log2[/tex]
You know that [tex]log2=0.3010[/tex]
Then, when you substitute, you obtain:
[tex]3*0.3010[/tex]≈0.9030
Factor out 8 using 2.
log(8) = log(2^3)
Use the product rule [ log(xy) = log(x) + log(y) ] to simplify.
log(2^3) = 3 log(2)
Simplify using the given value for 2.
3(0.3010)
0.9030
Therefore, log(8) ≈ 0.9030 (Option B)
Best of Luck!
Jimmy is planning to paint the gate of his house. The gate has a glass panel. Painting the gate costs $2.50 per square foot. How much will he have to spend to paint the gate? PLEASE HELP!!
Answer:
[tex]\$103.75[/tex]
Step-by-step explanation:
step 1
Find the area of the gate
The area of the gate is equal to the area of a trapezoid minus the area of the rectangular glass panel
[tex]A=\frac{1}{2}(10+7)(5)-(0.71)(1.43)= 41.5\ ft^{2}[/tex]
step 2
Find the cost
Multiply the total area by $2.50
so
[tex]41.5*2.50=\$103.75[/tex]
Please help 50 points
Answer:
Step-by-step explanation:
Left Frame
Consecutive angles (angles that are one after another) add up to 180 degrees. (The are supplementary).
9x + 6x = 180o Combine like terms
15x = 180o Divide by 15
15x/15 =180/15
x = 12
===============
You could do this the way it is done in the more formal proof.
9x + 6x + 9x + 6x = 360 Combine like terms: each quadrilateral = 180o
30x = 360 Perform Division Property of equality
x = 360/30 Do the division
x = 12
Right frame
The left side of line 3 is the substitution property.
<A = 9x
<B = 6x
<C = 9x
<D = 6x
The left side of line 4 is 30x. This comes from 9+6 + 9 + 6
The right side of line 5 is the division property of equality
Answer:
the pdf wnt lad gimme dem pons doe
Step-by-step explanation:
Nisha did the work below to solve an equation.
Step 1 7b+3.2b-5=18.92
Step 2 10.2b-5=18.92
Step 3 5.2b= 18.92
Step 4 b=3.64.
In which step did Nisha make her first error?
Step 1
Step 2
Step 3
Step 4
Answer: step 3
I just took the test and got a 100%
Answer:
Step 3
Step-by-step explanation:
Here, the given expression,
[tex]7b + 3.2b - 5 = 18.92[/tex]
Since, when we solve the given expression the steps of solution are as follows,
Step 1 : 7b + 3.2b - 5 = 18.92
Step 2 : 10.2b - 5 = 18.92 ( Combining like terms in left side )
Step 3 : 10.2b = 23.92 ( Adding 5 on both sides )
Step 4 : b = 4.6 ( Dividing both sides by 10.2 )
Hence, by the above explanation it is clear that she made her mistake in step 3 ( she did not add 5 on right side )
A circle has a circumference of 7{,}8507,8507, comma, 850 units. What is the radius of the circle?
[tex]\bf \textit{circumference of a circle}\\\\ C=2\pi r~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ C=7850 \end{cases}\implies 7850=2\pi r\implies \cfrac{7850}{2\pi }=r\implies 1249.37\approx r[/tex]
Answer:
1249.37 units
Step-by-step explanation:
At a zoo, the lion pen has a ring-shaped sidewalk around it. The outer edge of the sidewalk is a circle (blue) with a radius of 11 m. The inner edge of the sidewalk is a circle (orange) with a radius of 9 m. Find the approximate AREA of the larger circle (blue). use 3.14 for pi
Answer:
380.13 m
Step-by-step explanation:
You first need to write down the Area formula for a circle which is A=pi x radius^2 .
So 11^2 x 3.1415...
121 x 3.1415... = 380.13 m
Two numbers total 14 ,and their differences is 12 .find two numbers
Answer:
12+2 =14
Step-by-step explanation:
Answer: 1 and 13.
Step-by-step explanation: Because of the total, we know that the first number has to be less than 5, but greater than 0. to start in the median, let's use 3.
3+12 = 15.
That won't work, so let's try 2.
2+12 = 14.
There's the answer.
1) Write an expression to represent the pattern.
19, 27, 35, 43...
A: y = 11x + 8
B: y = 8x + 11
C: y = 19x
D: 8x = 11
2) Write an expression to represent the sequence.
71, 62, 53, 44...
A: y = 9x + 80
B: y = 9x + 71
C: y = -9x + 80
D: y = -9x + 71
Answer:
1. B 2. C
Step-by-step explanation:
1. B is the answer because if you add 8 times 1 to 11 you get 19 and if you add 8 times 2 to 11 you get 27 so that is the expression to represent the pattern.
2. C is the answer because if you add -9 times 1 to 80 you get 71 and if you add -9 times 2 to 80 you get 62 so that is the expression to represent the pattern.
Melinda spent 4 Hours Reviewing for Her Midterm exams. She spent 1/4 Of The Time studying for social studies.How Many Hours Did she spend on social studies
Answer:
1 hour
Step-by-step explanation:
1/4 of 4 is 1
Answer:one hour
Step-by-step explanation:
Water boils at 100 degree, C. This is 400 percent more than my room's temperature. What is my room's temperature?
Your room temperature is 25°C.
Step-by-step explanation:
hope this helps!
Quest Manufacturing is building a product that costs $200 to start to build and $6.40 per unit sold. The company plans to sell each unit for $10.50. The company wrote an inequality to determine the minimum number of units (u) that it needs to sell to break even or make a profit on the product. 10.50u ≥ 200 6.40u What is the minimum amount of units that the company needs to sell to break even or make a profit on the product?
Answer:
49 units
Step-by-step explanation:
10.50u ≥ 200 + 6.40u solve for u....
4.10u ≥ 200 (subtract 6.40u to both sides)
u ≥ 200/4.10 (divide both sides by 4.10)
u ≥ 48.78
Any number of units greater than 48.78, but they can't sell parts of a unit, so 49 is the minimum number of units that need to be sold to make a profit
Solve using proper methods. Show work. (25 POINTS)
Initially a tank contains 10,000 liters of liquid at the time t = 0 minutes a tap is opened, a liquid then follows out of the tank. The volume of the liquid V liters, which remains in the tank after t minutes is given by V = 10,000(0.933)^t
a) Find the value of V after 5 minutes.
b) Find how long, to the nearest second, it takes for half of the initial amount of liquid to follow out of the tank.
c) The tank is regarded as effectively empty when 95% of the liquid has flowed out. Show that it takes almost three quarters of an hour for this to happen.
d) (i) Find the value of 10,000 - V when t = 0.001 minutes
(ii) Hence or otherwise, estimate the initial flow rate of the liquid. Give your answer in liters per minute, correct to two significant figures.
Answer:
a) 7069.82 Liters
b) 600 seconds
c) Shown below
d) (i) 0.6935 liters (ii) Since 0.6935 liters in 0.001 minute, so 693.5 liters per minute is as estimate (in liters per minute)
Step-by-step explanation:
a)
We simply put 5 into t of the equation and get the value of V. So:
[tex]V=10,000(0.933)^t\\V=10,000(0.933)^5\\V=7069.82[/tex]
So after 5 minutes the amount remaining is 7069.82 Liters
b)
half of the initial amount is half of 10,000 which is 5000. So we substitute 5000 into V and solve for t using logarithms.
Note: [tex]ln(a^b)=blna[/tex]
Thus, we have:
[tex]V=10,000(0.933)^t\\5000=10,000(0.933)^t\\0.5=(0.933)^t\\ln(0.5)=ln((0.933)^t)\\ln(0.5)=tln(0.933)\\t=\frac{ln(0.5)}{ln(0.933)}\\t=9.99[/tex]
Thus, t = 9.9949 minutes.
To get answer in seconds, we multiply by 60. Thus 9.9949*60= 600 seconds
c)
95% empty means 5% remaining. 5% of 10,000 = 0.05 * 10,000 = 500. We plug in 500 into V and solve for t as the previous step. Shown below:
[tex]V=10,000(0.933)^t\\500=10,000(0.933)^t\\0.05=0.933^t\\ln(0.05)=ln(0.933^t)\\ln(0.05)=tln(0.933)\\t=\frac{ln(0.05)}{ln(0.933)}\\t=43.1972[/tex]
So it takes around 43.1972 minutes to empty 95%. Since three-quarters of an hour is [tex](\frac{3}{4})(60)=45[/tex] minutes, we have shown that the time it takes (43.1972 minutes) is very close to three-quarters of an hour.
d)
We plug in 0.001 into t and find V. Then we subtract that value from 10,000. This is just finding how much water has been removed in 0.001 minutes. Let's do this:
[tex]V=10,000(0.933)^t\\V=10,000(0.933)^{0.001}\\V=9999.3065\\Now\\10,000 - 9999.3065 = 0.6935[/tex]
So, 0.6935 liters
She buys 3 roses she want the 1/4 of the flowers in the arrangement to be roses . How many more flowers must she buy ?
Answer:
1 1/4
Step-by-step explanation:
rigjt answer
Please HELP....Solve and graph the inequality. 45x + 5 < −3
Step-by-step explanation:
4/5x+5<-3
4/5x<-8
4x<-40
x<-10
Solve the equation. Round to the nearest hundredth. Show work.
[tex]4^{-5x-7} = 6^{2x-1}[/tex]
Answer:
[tex]x=-0.75[/tex]
Step-by-step explanation:
The given equation is
[tex]4^{-5x-7}=6^{2x-1}[/tex]
We take logarithm of both sides to base 10.
[tex]\log(4^{-5x-7})=\log(6^{2x-1})[/tex]
[tex](-5x-7)\log(4)=(2x-1)\log(6)[/tex]
We expand the brackets to get;
[tex]-5x\log(4)-7\log(4)=2x\log(6)-\log(6)[/tex]
Group similar terms;
[tex]-7\log(4)+\log(6)=2x\log(6)+5x\log(4)[/tex]
[tex]-7\log(4)+\log(6)=(2\log(6)+5\log(4))x[/tex]
[tex]\frac{-7\log(4)+\log(6)}{(2\log(6)+5\log(4))}=x[/tex]
[tex]x=-0.752478[/tex]
To the nearest hundredth.
[tex]x=-0.75[/tex]
If Seven cookies are shared equally by four people how many cookies will each person get
Final answer:
Each person will get 1 cookie and there will be 3 cookies leftover.
Explanation:
In this scenario, we have 7 cookies that are being shared equally among 4 people. To find out how many cookies each person will get, we divide the total number of cookies by the number of people.
So, 7 cookies divided by 4 people = 1.75 cookies per person.
Since we can't divide a cookie into fractions, each person will get 1 cookie and there will be 3 cookies leftover.
?2300 is invested in 4 years at 5% per year simple interest work out the total interest
Answer:
460
Step-by-step explanation:
I=P x r x t
P is the principal amount, $2300.00.
r is the interest rate, 5% per year, or in decimal form, 5/100=0.05.
t is the time involved, 4....year(s) time periods.
So, t is 4....year time periods.
To find the simple interest, we multiply 2300 × 0.05 × 4 to get that:
The interest is: $460.00
What is the value of the y-coordinate of the y-intercept of the function shown below? F(x)=-3x^2+5x-4
Answer:
The y-coordinate of the y-intercept is [tex]-4[/tex]
Step-by-step explanation:
we know that
The y-intercept is the value of y when the value of x is equal to zero
so
In this problem we have
[tex]F(x)=-3x^2+5x-4[/tex]
Find the y-intercept
For [tex]x=0[/tex]
[tex]F(0)=-3(0)^2+5(0)-4=-4[/tex]
The y-intercept is the point [tex](0,-4)[/tex]
therefore
The y-coordinate of the y-intercept is [tex]-4[/tex]
Answer:
The value would be -4.
Step-by-step explanation:
The volume of a rectangle or prism is 72 m? the prism is 2 cm wide and the 4 cm high what is the length of the prism
Answer:
9 cmStep-by-step explanation:
The formula of a volume of a rectangle prism:
[tex]V=lwh[/tex]
l - length
w - width
h - height
We have V = 72 cm³, w = 2 cm and h = 4 cm. Substitute:
[tex](2)(4)l=72[/tex]
[tex]8l=72[/tex] divide both sides by 8
[tex]l=9\ cm[/tex]