USA Today reports that about 25% of all prison parolees become repeat offenders. Alice is a social worker whose job is to counsel people on parole. Let us say success means a person does not become a repeat offender. Alice has been given a group of four parolees. Find the probability P(r) of r successes ranging from 0 to 4. (Round your answers to three decimal places.)
P(0) =
P(1) =
P(2) =
P(3) =
P(4) =
What is the expected number of parolees in Alice's group who will not be repeat offenders? What is the standard deviation?
Answer:
P(0) = 4C0 * 0.75⁰ * 0.25⁴ = 0.00390625 . = 0.004
P(1) = 4C1 * 0.75¹ * 0.25³ = 0.046875 . . . = 0.047
P(2) = 4C2 * 0.75² * 0.25² = 0.2109375 . . = 0.211
P(3) = 4C3 * 0.75³ * 0.25¹ = 0.421875 . . . = 0.422
P(4) = 4C4 * 0.75⁴ * 0.25⁰ = 0.31640625 . = 0.316
Check:
P(0) + P(1) + P(2) + P(3) + P(4) = 1 . . . ok
Step-by-step explanation:
PLEASE HELP 20 POINTS! Hunter and his children went into a movie theater and will buy bags of popcorn and
drinks. Each bag of popcorn costs $5.50 and each drink costs $6. Hunter has a total
of $80 to spend on bags of popcorn and drinks. Write an inequality that would
represent the possible values for the number of bags of popcorn purchased, b, and the
number of drinks purchased, d. Write in an inequality.
plz help me answer this.
Find the diameter of the circle with a circumference of 80 feet. Use 3.14 for pi. Round your answer to the nearest tenth.
12.7 ft
25.5 ft
40.0 ft
50.9 ft
How many subsets does this set have: A = {2,4,6,8,10}
A. 5
B. 8
C. 28
D. 32
Answer:
5(option a) is the correct answer
f - 4.1 = 8.6
please help i need ur help please
Answer:
f=12.7
Step-by-step explanation:
Answer:
12.7
Step-by-step explanation:
To find f, we need to "reverse" the operation and do 8.6 + 4.1 which equals 12.7.
Double check: 12.7 - 4.1 = 8.6 which is true. Therefore, 12.7 = f.
Hope this helps! If it did, please give me brainliest! It would help me a lot! Thanks! :D
Please help i have a zero on this i need to get 100
Answer:
The answer is D :)
Step-by-step explanation:
What is the number of b? 50b = 7,300
Answer: 146
Step-by-step explanation: Divide 7300 by 50
Answer:
b = 1460
Step-by-step explanation:
50b = 7,300
the steps are easy and simple- Divide 50 on each side
50b/50 = 7300/50
this will isolate b and give it's answer
b = 1460
There are 250 tables total in a cafeteria. There are 150 tables with red tablecloths and 100 tables with white tablecloths. As people walk into the cafeteria they are randomly assigned to a table. What is the probability of the first person through the door of being sat at a table with a red tablecloth? SIMPLIFY
Answer:
60%
Step-by-step explanation:
If there are 250 tables you can multiply it by 4 to work with 1000. This means you have to multiply the other table cloth numbers. 150 x 4 = 600. 100 x 4 = 400. Once you simplify you can get 40 white and 60 red out of 100. 60/100 = 60%.
W.8
w 11
a Write a polynomial that represents the area of the lawn.
b. Write a polynomal that represents the perimeter of the lawn
Answer:
.
Step-by-step explanation:
Graph x > -5 on a number line.
Answer:
yes
Step-by-step explanation:
that is correct unless your asking something else?
Reconsider Dr. Sameer's research question about how much time Cal Poly students spend on watching television. Suppose that for the random sample of 100 Cal Poly students the mean number of hours per day spent watching TV turns out to be 3.01 hours, and the standard deviation of the number of hours per day spent watching TV turns out to be 1.97 hours.
a. Is the number 1.97 a parameter or a statistic? Assign an appropriate symbol to this number.
b. Find the standardized statistic to investigate whether the data provide evidence that the average number of hours per day Cal Poly students spend watching TV is different from 2.75 hours.
c. What is your conclusion about the hypotheses, based on the calculated value of the standardized statistic? How are you deciding?
Answer:
a. 1.97 is a statistic
b. t test is = 1.32
p value = 0.186
c. there is not enough evidence to support our claim
Step-by-step explanation:
a. 1.97 is not a parameter it is a statistic. It is the standard deviation of the sample. we represent this with the symbol s.
b. we are claiming that the mean hours that are spent watching television is different from 2.75
we form our hypothesis as:
h0; u = 2.75
h1: u not equal to 2.7
t stat = barx - u/s/√n
= 3.01-2.75/(1.97/√100)
= 0.26/(1.97/10)
= 0.26/0.197
= 1.32
we get p value
n = 100
df = 100-1 = 99
using t distribution, pvalue = 0.1899
c. the p value is higher than our alpha level here
0.189 > 0.05, so we fail to reject H0. our conclusion is that there is not enough evidence to show that μ is different from 2.75
what two numbers multiply to equal -50 but adds up to equal 5
Answer:
10 and -5
Step-by-step explanation:
x + y = 5
xy = -50
y = 5 - x
x(5-x) = -50
5x - x^2 = -50
x^2 - 5x - 50 = 0
from there on we can solve the classic way
[tex]\Delta = (-5)^2 - 4\cdot1\cdot(-50) = 25 + 200 = 225\\\sqrt{\Delta} = 15\\x_1 = \frac{5 - 15}{2} = -5\\x_2 = \frac{5+15}{2} = 10\\y_1 = 5 - x_1 = 10\\y_2 = 5 - x_2 = -5[/tex]
Everything checks out.
Answer:
-5 × 10 = -50
-5 + 10 = 5
brainliest
2(6x+3) hurry please thanks
Answer:
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Step-by-step explanation:
btw the answer is
(12x+6)
Quadrilateral A'B'C'D'is the image of quadrilateral ABCD under a rotation of about point Q.
Determine the angle of rotation
a. -90
b. -60
c. 60
d. 90
9514 1404 393
Answer:
a. -90°
Step-by-step explanation:
Point A is straight west of Q.
Point A' is straight north of Q. This represents a rotation of 90° clockwise, or -90°. (Positive angles are counterclockwise.)
What is the answer and the work i have to do to get to it
Answer:
B
Step-by-step explanation:
What is the equation of the line that passes through the points (8,5) and (-6,5)
Answer:
[tex] \frac{y - 5}{x - 8} = \frac{5 - 5}{8 - ( - 6)} \\ (y - 5)(14) =0 \\ 14y - 70 = 0 \\ [/tex]
Is it?
4+5[tex]4+5\frac{x}{y} 3x^{2} - 3x^{2}[/tex]
Answer:
[tex]58 + \frac{ {15x}^{3} }{y} - {3x}^{2} [/tex]
Step-by-step explanation:
1) Use this rule: a/b × c/d = ac/bd.
[tex]4 + 54 + \frac{5x \times {3x}^{2} }{y} - {3x}^{2} [/tex]
2) Take out the constants.
[tex]4+54 + \frac{(5 \times 3) {xx}^{2} }{y} - {3x}^{2} [/tex]
3) Simplify 5 × 3 to 15.
[tex]4 + 54 + \frac{ {15xx}^{2} }{y} - {3x}^{2} [/tex]
4) Use the product rule: x^a x^b = x^a + b.
[tex]4 + 54 + \frac{15xx^{2} }{y} - 3x^{2} [/tex]
5) Simplify 1 + 2 to 3.
[tex]4 + 54 + \frac{15 {x}^{3} }{y} - {3x}^{2} [/tex]
6) Collect like terms.
[tex](4 + 54) + \frac{15 {x}^{3} }{y} - {3x}^{2} [/tex]
7) Simplify.
[tex]58 + \frac{ {15x}^{3} }{y} - {3x}^{2} [/tex]
Therefor, the answer is 58 + 15x³ / y - 3x².
Michael weighed 186 pounds. His doctor put him on a diet which enabled him to lose 3 pounds per month. What was his weight after 7 months on the diet?
Answer:
165 pounds
Step-by-step explanation:
3 times 7 = 21
186 - 21 = 165
72/10-9/2=_____
i need help with this problem
7.6e+12 wrote in scientific notation
Answer:
7.6e+12 written in scientific notation is 7.6 x 10^12
(Hope this helps! Btw, I answered first. Brainliest please! :D)
PLSS HELPPPP!!!
Which expressions represent the total area of the large rectangle? Select all that apply.
Answer:
A, C, and E
Step-by-step explanation:
Can answer these questions
Which three lengths can NOT be the lengths of the sides of a triangle?
A.23 m, 17 m, 14 m
B. 5m, 7m, 8m
C. 21m, 6m, 10m
D.11 m, 11 m, 12 m
Answer:
C. 21m, 6cm, 10m
Step-by-step explanation:
FIRST TO ANSWER RECIEVES BRAINLIEST
In the figure below, the radius of circle O is 3 centimeters.
What is the length of the arc bounded by central angle POQ?
cm
7 cm
оооо
EIN 50
За cm
3л
cm
2
Answer:
C)
Step-by-step explanation:
As it is 60 degree, and the whole circle is 360 degree, so we need to find 1/6 of the circumference of a circle, as C = 2*pi*r = 2*pi*3 = 6pi and 1/6 of it is pi.
Instructions: Write an equation to represent the situation and
then solve.
Oceanside Bike Rental Shop charges 18 dollars plus 6 dollars an
hour for renting a bike. Jason paid 72 dollars to rent a bike. How
many hours did he pay to have the bike checked out?
Jason rented the bike for
hours.
Answer:
y=6x+18 or 72=6x+18
Step-by-step explanation:
18 represents the y intercept as 6x represents the constant variation
A rectangular prism gift box has dimensions of 2.5 inches and 7 inches in 9 inches how much wrapping paper will it take to cover the gift Boxxx round the answer to the nearest 10th
Which sets of measurements could be the side lengths of a triangle?
Select each correct answer.
A. 6 cm, 7 cm, 8 cm
B. 4 cm, 8 cm, 13 cm
C. 3 cm, 3 cm, 3 cm
D. a 7 cm, 7 cm, 10 cm
E. 5 cm, 9 cm, 14 cm
Answer:
A
Step-by-step explanation:
easy way to take a note
is that the sum of the 2 first angles much be greater than the 3rd one
so A
Dr. Toliver has 6 fossils.
Dr. Cook has 5 times as many fossils as Dr. Maranan.
They have 90 fossils altogether. How many fossils does Dr. Maranan have?
Copyright 2020 Edmentum, Inc. All Rights Reserved
(hp
Answer:
dude 30 fossils are left
Step-by-step explanation:
what is the measurement of abd
Answer:
it is 23. always remember it's supposed to add up to 180. So add up all your numbers and subtract the total from 180 to get your answer
Answer:
113 degrees
Step-by-step explanation:
ABF= 39 degrees
ABE= 51 degrees
ABD= 23 degrees (BE is a right angle, which is 90 degrees, 90-67=23
39+51+23= 113
Hope this helps!