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

Answer:

-3 degrees per hour

Step-by-step explanation:

Answer 2

Answer: -3 degrees per hour.

Step-by-step explanation:

Given: The temperature fell from 0 degrees to $6\frac{3}{5}$ degrees below 0 in $2\frac{1}{5}$ hours.

The change in temperature=$0-6\frac{3}{5}$

$=-\frac{33}{5}$ degrees

Time taken to change the temperature=$2\frac{1}{5}=\frac{11}{5}$ hours

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

$\frac{\text{Change in temperature}}{\text{Time}}=\frac{-\frac{33}{5}}{\frac{11}{5}}\\\\=\frac{-33\times5}{11\times5}=-3\text{ degrees per hour}$