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LiRa [457]
2 years ago
14

A train travels from Washington DC to new york(225 miles). The train departs at 4:55 PM and arrives in New York at 7:55 PM. What

is the average speed of the train in miles per hour?
Mathematics
1 answer:
mylen [45]2 years ago
4 0

Answer:

The average speed is:

\var{v}=75\: miles/h

Step-by-step explanation:

The average speed equation is given by:

\var{v}=\frac{\Delta x}{\Delta t}

Were:

  • Δx is the displacement (225 miles)
  • Δt is the change in time (3 hours)

Then we have:

\var{v}=\frac{225}{3}

\var{v}=75\: miles/h

I hope it helps you!

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An experiment consists of rolling two fair number cubes. What is the probability that the sum of the two numbers will be >3
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Answer:   \bold{\dfrac{5}{12}}

<u>Step-by-step explanation:</u>

greater than 3 means the sum is either 4, 5, or 6.

There are 15 permutations that meet the criteria:

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(2, 2), (2, 3), (2, 4), (2, 5), (2,6)

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3 0
3 years ago
An account earns simple interest. (a) Find the interest earned. (b) Find the
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Answer:

#a. $80

#b. $1680

Step-by-step explanation:

We are given;

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We are required to determine the amount of simple interest earned and the amount or balance in the account after 1 year.

#a. Interest earned

To calculate simple interest we use the formula;

I = (PRT) ÷ 100

Where, P is the principal, R is the rate, T is the time and I is the simple interest.

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I = (1600 × 5 × 1) ÷ 100

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Therefore, simple interest earned is $80

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We are going to use the formula;

A = P + I , where A is the amount accrued, P is the principal and I is the simple interest earned.

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Thus, the account balance after 1 year will be $1680

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The value of b in the exponential function which is formed by Shanna for the price of land is 8% or 0.08.

<h3>What is percentage increase ?</h3>

Percentage increase is the amount added to the initial value in the percentage part.

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Learn more about the percentage increase here;

brainly.com/question/2085058

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