Question

The temperature fell from 0 degrees to 6 3/5 degrees below 0 in 2 1/5 hours. What was the temperature change per hour?

Answer 1

a

Explanation:

Answer 2

Answer: -3 degrees per hour.

Explanation:

Given: The temperature fell from 0 degrees to
`6(3)/(5)` degrees below 0 in
`2(1)/(5)` hours.

The change in temperature=
`0-6(3)/(5)`

`=-(33)/(5)` degrees

Time taken to change the temperature=
`2(1)/(5)=(11)/(5)` hours

Now, the temperature change per hour is given by :-

`\frac{\text{Change in temperature}}{\text{Time}}=(-(33)/(5))/((11)/(5))\\\\=(-33*5)/(11*5)=-3\text{ degrees per hour}`