Question

A heated 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. −8° Celsius

B. 26° Celsius

C. 32° Celsius

D. 56° Celsius

Answer 1

@IMStuck please help?

Answer 2

this is my last question -.-

Answer 3

Put x = 5 in each of the two functions and add the results to get the combined cooling effect.

Answer 4

.5^5-11
-5-3

.5^-6
-8

so far so good?

Answer 5

then 64-8 =56???

Answer 6

Yes.

Answer 7

yep. Took me a while to get this, but you're one the right track.