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mr_godi [17]
3 years ago
11

A certain number is 20% of Number A

Mathematics
1 answer:
son4ous [18]3 years ago
5 0

Answer:

A is bigger

Step-by-step explanation:

lets say the certain number is 10 and if its 20% of Number A that would mean that number A is 50 and that would also mean that number B is 25 so since 50 is bigger then 25 that would mean number A is bigger

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What is the height of a box in inches if the volume is 30 cubic inches, the width is 2.5 inches and the length is 3 inches?
ehidna [41]

Answer:

  4 inches

Step-by-step explanation:

The volume of a box is the product of its dimensions:

  V = LWH

Fill in the given information and solve for the unknown value.

  30 in³ = (3 in)(2.5 in)H

  30 in³/(7.5 in²) = H . . . . . . . divide by the coefficient of H

  H = 4 in . . . . . evaluate

The height of the box is 4 inches.

7 0
3 years ago
There are 11 teachers and 132 students at a middle school. What is the ratio of teachers to students
Evgesh-ka [11]
1:12 is the ratio of teachers to zstudents
4 0
3 years ago
Read 2 more answers
Help please i need to do this for a review
Natasha_Volkova [10]

Answer:

B

Step-by-step explanation:

4 0
3 years ago
An article on polygraph testing of FBI agents indicated that the probability of a false-positive (a trustworthy person who nonet
Alexandra [31]

Answer:

The variable x will follow a geometric distribution, with mean = 3 and standard deviation = 3.46.

The values for P(x) are:

P(0)=0.25\\\\P(1)=0.1875\\\\P(2)=0.1406\\\\P(3)=0.1055\\\\P(4)=0.0791\\\\P(5)=0.0593\\\\P(6)=0.0445\\\\P(7)=0.0334\\\\P(8)=0.025\\\\P(9)=0.0188\\\\P(10)=0.0141\\\\

Step-by-step explanation:

This kind of random variables can be descripted by the geometrical distribution.

This distribution shows the probability of having an amount of "failures" before the first "success" (or the other way).

Let x be the number of trustworthy FBI agents tested until someone fails the test. The probability of failing a test is p=0.25

Then, the probability of x is:

P(x)=q^x\cdot p

The values for the first x are:

P(0)=0.75^0\cdot 0.25=0.25\\\\P(1)=0.75^1\cdot 0.25=0.1875\\\\P(2)=0.75^2\cdot 0.25=0.1406\\\\P(3)=0.75^3\cdot 0.25=0.1055\\\\P(4)=0.75^4\cdot 0.25=0.0791\\\\P(5)=0.75^5\cdot 0.25=0.0593\\\\P(6)=0.75^6\cdot 0.25=0.0445\\\\P(7)=0.75^7\cdot 0.25=0.0334\\\\P(8)=0.75^8\cdot 0.25=0.025\\\\P(9)=0.75^9\cdot 0.25=0.0188\\\\P(10)=0.75^{10}\cdot 0.25=0.0141\\\\

This probability will be descending as the the variable x increases.

The mean is:

\mu=\frac{1-p}{p}= \frac{1-0.25}{0.25}=\frac{0.75}{0.25}=3

The standard deviation is:

\sigma=\sqrt{\frac{1-p}{p^2}} =\sqrt{ \frac{0.75}{0.25^2} }=\sqrt{12}= 3.46

5 0
3 years ago
A picture of a goldfish has a scale of 8 centimeters to 3 centimeters if the actual goldfish is 12 centimeters long how long is
Licemer1 [7]

Answer:

8 to 36

Step-by-step explanation:

since the goldfish would be 12 centimeters also known as to 3 centimeters. multiply them and you get 36 centimeters

8 0
3 years ago
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