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gavmur [86]
2 years ago
12

A) Serena walks 4 km in 1 h. Explain!

Mathematics
1 answer:
Shkiper50 [21]2 years ago
6 0

Answer:

didn't I explain how to do it

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Noel and Casey both start at the same place. Noel walks due south and Casey walks due east. After some time has passed, Noel is
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Answer:

2.04 miles per hour

Step-by-step explanation:

Given

Noel

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Required

The rate at which the distance increases

Their movement forms a right triangle and the distance between them is the hypotenuse.

At n_1 =6miles and c_1 = 8miles

The distance between them is:

d_1 = \sqrt{n_1^2 + c_1^2}

d_1 = \sqrt{6^2 + 8^2}

d_1 = \sqrt{100}

d_1 = 10miles

After 1 hour, their new position is:

New = Old + Rate * Time

n_2 = n_1 + r_1 * 1

n_2 = 6 + 2 * 1 = 8

And:

c_2 = c_1 + r_2 * 1

c_2 = 8 + 1 * 1 = 9

So, the distance between them is now:

d_2 = \sqrt{n_2^2 + c_2^2}

d_2 = \sqrt{8^2 + 9^2}

d_2 = \sqrt{145}

d_2 = 12.04

The rate of change is:

\triangle d = d_2 -d_1

\triangle d = 12.04 -10

\triangle d = 2.04

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