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2 years ago

A train travel 12 miles in 8 minutes at this rate how many miles does the train travel 60 minutes

Mathematics

2 answers:

tensa zangetsu [6.8K]2 years ago

8 0

Answer:

12/8=1.5miles per min

1.5*60=90 miles

Lelu [443]2 years ago

8 0

Answer:

12/8=1.5miles per min

1.5*60=90 miles

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Chapter 7, Section 7.2, Question P9 The process for manufacturing a ball bearing results in weights that have an approximately n

bogdanovich [222]

a. Let $X$ be a random variable representing the weight of a ball bearing selected at random. We're told that $X\sim\mathcal N(0.15,0.005^2)$ , so

$\mathrm P(X$

where $Z\sim\mathcal N(0,1)$ . This probability is approximately

$\mathrm P(Z$

b. Let $X_i$ be a random variable representing the weight of the $i$ -th ball that is selected, and let $Y$ be the mean of these 4 weights,

$Y=\dfrac{X_1+X_2+X_3+X_4}4$

The sum of normally distributed random variables is a random variable that also follows a normal distribution,

$X_1+X_2+X_3+X_4\sim\mathcal N(4\cdot0.15,4\cdot0.005^2)$

so that

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c. Same as (b).

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3 years ago

Addison plays 1/2 of a song in 1/4 of a minute. How minutes will she need to play a full song?

STALIN [3.7K]

Answer:

30 minutes

Step-by-step explanation:

She plays 1/2 of a song in 1/4 of a minute so that would be 15 minutes because if you divide 60 by 4 you would get 15. You would multiply 15 by 2 because if she plays a full song you multiply 1/2 by 2 to get a whole. So she will need 30 minutes to play a full song

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3 years ago

Read 2 more answers

The two square pyramids are similar. The side length of the smaller pyramid is 3/4 the side length of the larger pyramid.

Triss [41]

Answer:9/16

Step-by-step explanation:

Since we know it's 3/4 use

r=(3/4)² .... $(\frac{3}{4} x\frac{3}{4} )$ = $\frac{9}{16}$