Question

A heated piece of metal cools according to the function c(x) = (.5)x − 7, where x is measured in hours. A device is added that aids in cooling according to the function h(x) = −x − 2. What will be the temperature of the metal after two hours?

−4° Celsius

28° Celsius

32° Celsius

38° Celsius

Answer 1

@texaschic101 @FriedRice

Answer 2

@DominicNg @IMStuck

Answer 3

hmmm
c(x) and h(x) are given in the problem statement. Just copy them into C(x)=c(x)+h(x).

Answer 4

Then, C(x) = (.5)^x - x - 9 = (.5)^x - x - 9
Now, evaluate this function at x = 2.

Answer 5

If C(x) = (.5)^2 - x - 9, then C(2) = (.5)^2 - 11 = (1/4)-11.

Answer 6

are you unclear of whats happening?

Answer 7

yes

Answer 8

wait brb

Answer 9

ok remember i said you can just copy the two equations into C(x)=c(x)+h(x).

Answer 10

do that