The current temperature is #54^circ F#. It is expected rise #2.5^circ F# each hour. In how many hours will the temperature be #84^circ F#?

1 Answer
May 30, 2018

Answer:

12

Explanation:

Let the number of hours be H

Hence your equation is #54+2.5H = 84#

What the equation is basically saying is that you have an initial temperature of #54# and since you add #2.5# to each hour, #2.5H# means that the unknown number of #2.5# is added one after the other #(2.5+2.5+2.5+...)# until the temperature amounts to #84#

#54+2.5H=84#

#2.5H=30#

#H=12#

Therefore, the number of hours required is 12