Question

You want to use the hot tub at the hotel you're staying at, but it's not hot enough. The hotel manager tells you they they will turn the heat up and the temperature will increase by 10% each hour.The initial temperature of the hot tub is 68°. The hot tub heater shuts off when the water hits the standard maximum safe temperature of 104°F. For about how long did the heater run?

Answer 1

I would have to say

temp(4) = 68* (1.10)^4= 108

104=68* (1.10)^ hrs ask 104/68=(1.10)^hrs

This is clearly me guess not saying this is right?