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3 years ago

10

8. A store owner paid $15 for a book. She marked up the price of the book by 40% to determine its selling price. What is the sel

ling price of the book?

1 answer:

alexdok [17]3 years ago

5 0

Answer:

21

Step-by-step explanation:

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Tyrell's SAT math score was in the 64th percentile. If all SAT math scores are normally distributed with a mean of 500 and a sta

jarptica [38.1K]

Answer:

$P(x < 535.8) = 0.64$

$P_{64} = 535.8$

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 500

Standard Deviation, σ = 100

We are given that the distribution of SAT score is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find the value of x such that the probability is 0.64

P(X<x) = 0.64

$P( X < x) = P( z < \displaystyle\frac{x - 500}{10})=0.64$

Calculation the value from standard normal z table, we have, $p(z$

$\displaystyle\frac{x - 500}{100} = 0.358\\x = 535.8$

$P(x < 535.8) = 0.64$

$P_{64} = 535.8$

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3 years ago

6 cars are racing. In how many ways can first, second and third places be awarded?

sammy [17]

Answer:

18ways

Step-by-step explanation:

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4 years ago

Read 2 more answers

Estimate the answer to

AlladinOne [14]

Answer:

~ 80.75 x 10^7

Step-by-step explanation:

9 x 8 + 9 * .5 + .5 * 8 + .5 * . 5 = ~ 80.75 x 10 ^7

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2 years ago

A triangle has side lengths of 19 centimetres, 19 centimetres, and 20 centimetres. Is this triangle equilateral?

Sedbober [7]

Answer:

no a equilateral triangle has the same length sides all the way around

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3 years ago

23 + 4.5 = 4.5 + 23 es un ejemplo de la propiedad

dybincka [34]

Step-by-step explanation:

ES UN EJEMPLO DE PROPIEDAD COMMULATIVE.

hola Hermano, cóme TE IIamas

donde vives?

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3 years ago