Question

on friday morning, the temperature dropped 2 degrees per hour for four hours.write and solve an equation to find the total number of degrees d the temperature dropped on Friday morning

Answer 1

minus 2 degrees every hour
there are 4 hours
d=degrees dropped
- 2 x 4 = d

Answer 2

Answer: The temperature dropped 8 degrees.

Explanation:

The initial temperature was T0, and each hour the temperature dropped by 2°, for 4 hours.

So we can write the temperature as a function of time in the next way:

T(t) = T0 - (2°/h)*t

where t is the number of hours since the temperature started to drop.

The temperature drop for four hours, so we have that the final temperature is:

T(4h) = T0 - (2*4)°= T0 - 8°

then we can calculate the difference between the final and initial temperature as:

T(4h) - T(0h) = T0 - 8° - T0 = -8°

This means that in Friday morning the temperature dropped by 8 degrees.