Question

The temperature in Baltimore is currently 15° F. It will decrease at a constant rate of 4° F per hour. Which temperature will it be in 4 hours? -16⁰F -1⁰F 31⁰F 19⁰F

Answer 1

SOLUTION

TO CHOOSE THE CORRECT OPTION

The temperature in Baltimore is currently 15° F. It will decrease at a constant rate of 4° F per hour.

Which temperature will it be in 4 hours

- 16⁰F

- 1 ⁰F

31⁰F

19⁰F

EVALUATION

Here it is given that the temperature in Baltimore is currently 15° F.

It will decrease at a constant rate of 4° F per hour.

Let D(t) be the temperature after t hours

Thus we get

D(t) = 15 - 4t

Now we have to find the temperature after 4 hours

This gives t = 4

So we have

D(t) = 15 - 4t

⇒ D(4) = 15 - ( 4 × 4 )

⇒ D(4) = 15 - 16

⇒ D(4) = - 1

Hence the temperature after 4 hours = - 1 ⁰F

FINAL ANSWER

Hence the correct option is - 1 ⁰F

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