Aheated piece of metal cools according to the function c(x) = (.5)^(x _ 11), where x is measured in hours. a device is added that aids in cooling according to the function h(x) = _x _ 3. what will be the temperature of the metal after five hours?
a. _8á celsius

b. 26á celsius

c. 32á celsius

d. 56á celsius

Option D

Explanation:

A heated piece of metal cools according to the function

And a device which aids in cooling is added is represented by the function h(x) = -x - 3

Temperature of the metal after x hours will be represented by

c(x) + h(x) =

               =

We have to find the temperature after 5 hours

So c(5) - h(5) =

                     =

                     = 64 - 8

                     = 56° Celsius

Option D is the answer.

if you answer my question i will answer yours

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000