Question

The Chang family is on their way home from a cross-country road trip. During the trip, the function D(t) = 2,280 – 60t can be used to represent their distance, in miles, from home after t hours of driving.

What is the value of D(15)?

Answer 1

1380

Explanation:

d(t)=2280-60t

d(15)=2280-60(15)

2280-900

=1380

Answer 2

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`D(t) = 2280 - 60t`

`D(15) = 2280 - 60(15)`

`D(15) = 2280 - 800`

`D(15) = 1480`

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