A scientist is measuring the temperature change in a chemical compund. The temperature dropped 11 degrees per hour from the original. After 4 hours, the temperature was 90 degress. Find the compounds original tempature

33.5

Step-by-step explanation:

let original temperature be T

If after 1 hr temperature drops by 11, then the rate of temperature drop is 11 per hr.

After 4 hours, temperature will drop to 4 (T-11).

if temperature after 4 hrs is 90, then

4 (T-11) = 90

T-11=90/4

T = (90/4) + 11

T=33.5