Question

A scientist measures the change in the temperature of a chemical solution at the start of the experiment, the solution is at a temperature of -14.96 C the temperature increases 2.9C each hour what is the temperature of the solution after 3 hours rounded to the nearest whole degree?

Answer 1

The temperature of the solution after 3 hours rounded to the nearest whole degree is -6 C

Explanation:

From the question, the temperature of the chemical solution at the start of the experiment is -14.96 C.

Now, if the temperature increases by 2.9 C each hour,

Then, after 3 hours, the temperature of the chemical solution would have increased by

2.9 C/h × 3 h

8.7 C

Hence, the temperature of the chemical solution would have increased by 8.7 C after 3 hours.

The temperature of the chemical solution after 3 hours will be

-14.96 C + 8.7 C

= -6.26 C

≅ -6 C (to the nearest whole degree)