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galina1969 [7]
2 years ago
10

Plssssssssssssssssssssssss help

Mathematics
2 answers:
horrorfan [7]2 years ago
4 0

Answer:

D

Step-by-step explanation:

The slope is -100/3 and the y intercept is 450

WARRIOR [948]2 years ago
4 0

Answer:

letter D

Step-by-step explanation:

hope it helps alot

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If a wheelchair-marathon racer moving at 13.1 miles per hour expends energy at a rate of 645 calories per hour, how much energy
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Answer:

1290 calories

Step-by-step explanation:

Given: The racer moves at 13.1 miles per hour expends energy at a rate of 645 calories per hour.

To find: Energy in calories, required to complete a marathon race 26.2 miles at this pace.

Solution: We have,

The racer moves at 13.1 miles per hour.

The racer expends energy at a rate of 645 calories per hour.

So, energy expended while moving 13.1 miles =645 calories.

Now, energy expended while moving 1 mile =\frac{645}{13.1} calories.

So, energy expended while moving 26.2 miles =\frac{645}{13.1}\times 26.2=645\times 2=1290 calories.

Hence, 1290 calories of energy is required to complete a marathon race 26.2 miles at this pace.

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