Question

A temperature probe registers a temperature

of -124° C. If the probe's temperature increases
by 8 °C per hour, after how many hours will it
be at a temperature of 4°C?

Answer 1

16 hours

Explanation:

Given

`Initial = -124`

`Rate = 8` per hour

Required

Determine the number of hours it gets to 4 degrees

Let the temperature at every hour, h be T.

So, we have:

`T = Initial + Rate * h`

`T = -124+ 8* h`

`T = -124+ 8h`

To calculate the time it gets to 4 degrees. We first substitute 4 for T; then solve for h

`4 = -124+ 8h`

Collect Like Terms

`8h = 4 + 124`

`8h = 128`

Solve for h

`h = (128)/(8)`

`h = 16`