Answer:
The correct answer is B) [68.2, 92.0]
Step-by-step explanation:
This is from usatestprep:
Given a normally distributed random variable X with mean and standard deviation , invNorm (p, , ) = x: P(X < x) = p.Because of the symmetry of the normal distribution about the mean, the bounds of the interval (x1, x2) centered at the mean, such that P(x1 < X < x2) = a arex2 = invNorm (0.5 +a2, , ); x1 = - (x2 - )Here x2 = invNorm (0.5 +0.502, 80.1, 17.7) = 92.04x1 = 80.1 - (92.04 - 80.1) = 68.06Rounded to the nearest tenth, the required interval is [68.1, 92.0].
drag step's into order to correctly to solve the equation x-27=
Answer:
x = 89x - 27 (+27) = 62 (+27)Step-by-step explanation:
you have to isolate x, the variable. to do so, you have to invert the number to 'cancel' it out
Can you help me with this math question pls? I need help super fast.
Answer: I thinks it’s B
Step-by-step explanation:
The area of a circle is 23.79cm2.
Find the length of the radius rounded to 2 DP.
Answer:
2.75cm
Step-by-step explanation:
Given data
Area of circle= 23.79cm^2
We know that the formula for the area of a circle is
Area= πr^2
Substitute
23.79=3.142*r^2
23.79/3.142= r^2
7.57=r^2
Square roo both sides
r= √7.57
r= 2.75 cm
Hence the radius is 2.75cm
Find the area of the figure. Sides meet at right angles. No links please
Answer:
answer: 72
Hope that helps!
3. Lin had $18 in her bank account. She bought a ticket to the movies for
$9, a bag of popcorn for $7 and a drink for $5. What is Lin's account balance
now?
what is equivalent to √1,620 / √180
Answer:
the answer is this! understand
Using the formula m= f(x2) - f(x1)/x2 - x1, what is the rate of change for the linear function that contains the
points (-3, 2) and (1,10)?
1/2
8
-4
2
Answer:
2
Step-by-step explanation:
The slope of the line through (-3, 2) and (1,10) can be found by lining up the point's vertically and subtracting then putting 2nd difference on top of first.
(1,10)
Minus
(-3,2)
-------
8/4=2
The slope is 2.
9.42 * 6.7 Show explanation
Answer: 63.114
Step-by-step explanation:
Multiply like normal but don’t bring your decimal down count how many number are behind the decimal. You have 2 on the first number and 1 on the second so count 3 places
Answer:
63.114
Step-by-step explanation:
See the picture I attached, I hope this helps!
Heck I can't leave I should but I can't---At a local pet store, Shirley noticed that about four out of five customers who bought pets chose goldfish. Shirley wants to know the estimated probability that three randomly selected customers buying pets would not buy goldfish. How could Shirley design a simulation for this scenario?
A.
She could roll a six-sided die three times. On the die, numbers 1 to 3 represent customers who buy goldfish and 4 to 6 represent customers who don’t buy goldfish.
B.
She could spin a spinner divided into nine equal sections three times. On the spinner, four sections represent customers who buy goldfish and five sections represent customers who do not buy goldfish.
C.
She could spin a spinner divided into five equal sections three times. On the spinner, four sections represent customers who buy goldfish and one section represents customers who do not buy goldfish.
D.
She could use a random number generator to generate a set of three numbers from 0 to 9. The numbers 0 to 4 represent customers who buy goldfish, and 5 to 9 represent customers who do not buy goldfish.
E.
She could use a number generator to generate a set of five numbers from 0 to 3. The numbers 0 to 2 represent customers who buy goldfish, and 3 represents customers who do not buy goldfish.
Answer:
C. She could spin a spinner divided into five equal sections three times. On the spinner, four sections represent customers who buy goldfish and one section represents customers who do not buy goldfish.
Step-by-step explanation:
We are told that four out of five customers who bought pets chose goldfish.
Thus;
P(those who bought pets also chose gold fish) = 4/5
Therefore;
P(those who bought pets but do not buy gold fish) = 1 - (4/5) = 1/5
Now, she wants to know the estimated probability that three randomly selected customers buying pets would not buy goldfish.
The probability we have is 1/5.
Therefore,to accommodate the 3 randomly selected customers, we have to multiply the numerator and denominator for each probability by 3.
Thus;
P(those who bought pets also chose gold fish) = 4/5 × 3/3 = 12/15
P(those who bought pets but do not buy gold fish) = 1/5 × 3/3 = 3/15
Looking at the new probabilities, the simulation she can use is to divide a spinner into five equal sections three times so that for each section, we can have the probability of 1/5 and 4/5.
Thus, option C is correct.
I will mark brainiest whoever answers this correctly
some patients participated in a clinical trial for a new drug to treat osteoporosis. A patient is selected at random. The probability that the patient had no change in his bone mass density is 7/13, the probability that he had a slight reduction in his bone mass density is 1/k and the probability that he had a significant reduction in his bone mass density is 1/2k. Find the value of k
Answer:
k = 3.9
Step-by-step explanation:
Since the three possible outcomes are given. Therefore, the sum of all the probabilities of the three possible outcomes will be equal to one:
[tex]\frac{7}{13} +\frac{1}{k}+ \frac{1}{2k} = 1 \\\\\frac{1}{k} \frac{1}{2k} =1-\frac{7}{13}\\\\\frac{3}{2k} \frac{5}{13}\\\\2k = \frac{(13)(3)}{5}\\\\k = \frac{39}{(5)(2)}\\[/tex]
k = 3.9
The zeros of a function are the values of for which the function is equal to zero. Enter a number in each blank to make true statements about the function ()=(2−6)(−4).
Answer:
Here we want to complete the blank to make the equality true:
( ) = (2 - 6)*(-4)
The equality is true if we have the same value in both sides, so we can think of this as an algebraic equation:
x = (2 - 6)*(-4)
We just need to find the value of x.
Then let's solve the right side:
x = (2 - 6)*(-4) = (-4)*(-4)
Remember the rule of signs:
(-)*(-) = (+)
x = (-4)*(-4) = 4*4 = 16
Then we need to complete the blank with the number 16
(16) = (2 - 6)*(-4)
How old am I if 500 reduced by 2 times
my age is 322?
Answer:
You are 89 years old.
Step-by-step explanation:
First I subtracted 322 from 500 which got me 178. Then I finally did 178 divided by 2 which got me 89.
Hope this helps you! :)
The Central High School students voted to select a school mascot. The results
of the vote are recorded in the table. What is the probability that a randomly
selected senior voted for an eagle mascot?
Class Falcon Eagle Total
Freshman 155 90 245
Sophomore 160 65 225
Junior 100 130 230
Senior 165 55 220
Total
580 340 920
Answer:
1/4 or 0.25
Step-by-step explanation:
The probability that a randomly selected senior voted for an eagle mascot is 11/68.
Given that, the Central High School students voted to select a school mascot. The results of the vote are recorded in the table.
We need to find what is the probability that a randomly selected senior voted for an eagle mascot.
What is the formula to find the probability of an event?Probability can be defined as the ratio of the number of favourable outcomes to the total number of outcomes of an event. For an experiment having 'n' number of outcomes, the number of favourable outcomes can be denoted by x. The formula to calculate the probability of an event is as follows.
Probability(Event) = Favorable Outcomes/Total Outcomes = x/n
Now, probability = 55/340 =11/68
Therefore, the probability that a randomly selected senior voted for an eagle mascot is 11/68.
To learn more about the probability visit:
https://brainly.com/question/9793303.
#SPJ2
Jonathan just got $12 for his weekly allowance. He puts half of his allowance in his savings
account. What could he do with the rest of the money? Select all that apply.
donate $1 to charity and keep $5 for spending money
spend $10 on a baseball cap and donate $2 to charity
spend $9 renting a canoe and $3 for a water bottle
spend $3 on candy, $5 on an ice cream sundae, and $4 on a baseball
Answer:
keep 5 dollars spending and 1 dollar charity
Step-by-step explanation:
the rest don't add up to 6 dollars and that is all the money he has.
what are the first three terms of the sequence defined by the following function?
f(n)=41+(n-1)^5
Answer:
41, 40 and 9Step-by-step explanation:
[tex]f(n)=41+(n-1)^5\\\\f(1)=41+(1-1)^5=41\\\\f(2)=41+(2-1)^5=41-1=40\\\\f(3)=41+(3-1)^5=41-32=9[/tex]
A school guidance counselor is researching the number of high school students who play an online video game that is aimed at much younger children. She polls 100 seniors that regularly meet in her office to gather data for her study. Which statement best describes the results of this poll?
C is the answer
Answer:
C is the answer
Step-by-step explanation:
Answer:
C) The results of the poll are likely an underestimation of the number of high school students who play the game.
Step-by-step explanation:
I got it correct.
The sum of two numbers is 20.The difference is 4 what are the numbers?
Determine the zeros of the function f(x)=x^2-2x-8.
please help asap!!!!
Translate: two is four more than a number, x
2 is 4 more than -2
I know this because there is no positive number -4 from 2 so you need to go to the negatives which means 2, 1 ,0, -1,-2.
Hope this helped<3
Have a wonderful day...
-Dignoris :)
A field has a length of 260 meters and a width of 500 meters. Part of the field, 50 meters by 200 meters, is paved for a parking lot. How much of the area remains unpaved?
Answer: 120,000 meters²
Step-by-step explanation:
First find the area of all the land both paved and unpaved:
= Length * Width
= 260 * 500
= 130,000 meters²
The find the area paved:
= 50 * 200
= 10,000 meters²
The area left unpaved:
= Total area - Paved area
= 130,000 - 10,000
= 120,000 meters²
The average weight of a male African elephant is 15,000 pounds. How many tons is this?
A. 7 1/2 tons
B. 7 Tons
C. 8 Tons
D. 30,000,000 Tons
Answer:
A
Step-by-step explanation:
I just looked it up lol but I hope I helped
Katie has the following grades on the last 5 math tests: 56, 90, 67, 82, 78. What would her average test score be?
Answer:
74.6
Step-by-step explanation:
Tp find the average, add all the scores and divide by the number of scores.
56 + 90 + 67 + 82 + 78 = 373
Now divide 373 by 5.
373 / 5 = 74.6
The price of a snowsuit is reduced by $28.38.
This is a discount of 33%.
a) What is the regular price of the snowsuit?
b) What is the sale price of the snowsuit, including taxes?
Answer:
(a) s = the original price = $28.38 / 0.67 = $42.36
Step-by-step explanation:
Let s represent the original price of the snowsuit.
If $28.38 is a discount of 33% from the original price, then (1.00 - 0.33)s = $28.38, or 0.67s = $28.38.
(a) s = the original price = $28.38 / 0.67 = $42.36
(b) if taxes are 7% then the sale price is (1.07)($42.36) = $45.32.
Of course, if the tax rate is other than 7%, the total sale price will be different.
 A set of measurements is taken and recorded and the table shown.
does the data in the table have a constant rate of change or a constant multiplier, and what is its value?
A.
Constant rate of change of 1.2
B.
Constant multiplier of 1.2
C.
Constant rate of change of 1.5
D.
Constant multiplier of 1.5
Answer;
The correct answer here is constant multiplier of 1.5
Step-by-step explanation:
To get the constant multiplier, we have to take a look at the y values
subsequent y values were obtained by multiplying the preceding y value with a term
So we have it that;
3.6/2.4 = 5.4/3.6 = 8.1/5.4 = 1.5
The correct answer here is constant multiplier of 1.5
Factorise fully 15x² + 10x
Answer:
5x (3x + 2)
Step-by-step explanation:
15x² + 10x
5x (3x + 2)
Determine how to translate triangle ABC to triangle A'B'C'
image is right there please help
Answer:
Step-by-step explanation:
Can you at least put the questio here
erms is selling tickets to a musical performance.
Answer:
the price of an adult ticket is $3 and a child ticket is $2
Step-by-step explanation:
Please Solve. Thanks.
Answer:
Option C, Y and Z appear to be parallel lines
Hope this helps!