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3 years ago

A train travels with a constant speed of 74 miles per hour how far can you travel in 2 hours

Mathematics

2 answers:

pickupchik [31]3 years ago

4 0

Answer:All you have to do is add or multiply

Step-by-step explanation: Ratio: 74 miles/1 hour

So all you have to do is multiple 74 by 2, or you can add 74 plus 74 and you will get 148 74

+74

148

Artemon [7]3 years ago

4 0

Answer:

multiple 74 by 2, or 74 + 74= 148

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lisabon 2012 [21]

Answer:

Step-by-step explanation:49

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3 years ago

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Sara is building a triangular pen for her pet rabbit. If two of the sides measure 8 feet and 15 feet, the length of the third si

Nesterboy [21]

Answer:

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Step-by-step explanation:

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3 years ago

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Simplify by dividing three over five divided by negative four over nine.

Kruka [31]

If I read that right:

(3/5)/(-4/9) is equal to

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3 years ago

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I am not sure if this is right can someone check it ASAP please

NikAS [45]

Answer:

x=10

Step-by-step explanation:

3(4x-12) = 84

Divide each side by 3

3/3(4x-12) = 84/3

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4x-12+12 = 28+12

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6 0

3 years ago

Assume that women's heights are normally distributed with a mean given by mu equals 62.5 in,and a standard deviation given by

Misha Larkins [42]

Answer:

(a) 0.5899

(b) 0.9166

Step-by-step explanation:

Let X be the random variable that represents the height of a woman. Then, X is normally distributed with

$\mu$ = 62.5 in

$\sigma$ = 2.2 in

the normal probability density function is given by

$f(x) = \frac{1}{\sqrt{2\pi}2.2}\exp{-\frac{(x-62.5)^{2}}{2(2.2)^{2}}}$ , then

(a) $P(X < 63) = \int\limits_{-\infty}^{63}f(x) dx$ = 0.5899

(in the R statistical programming language) pnorm(63, mean = 62.5, sd = 2.2)

(b) We are seeking $P(\bar{X} < 63)$ where n = 37. $\bar{X}$ is normally distributed with mean 62.5 in and standard deviation $2.2/\sqrt{37}$ . So, the probability density function is given by

$g(x) = \frac{1}{\sqrt{2\pi}\frac{2.2}{\sqrt{37}}}\exp{-\frac{(x-62.5)^{2}}{2(2.2/\sqrt{37})^{2}}}$ , and

$P(\bar{X} < 63) = \int\limits_{-\infty}^{63}g(x)dx$ = 0.9166

(in the R statistical programming language) pnorm(63, mean = 62.5, sd = 2.2/sqrt(37))

You can use a table from a book to find the probabilities or a programming language like the R statistical programming language.

4 0

3 years ago