Question

A heated piece of metal cools according to the function c(x) = (.5)x − 10, where x is measured in hours. A device is added that aids in cooling according to the function h(x) = −x − 1. What will be the temperature of the metal after five hours?

−6° Celsius

26° Celsius

32° Celsius

38° Celsius

Answer 1

@ranga

Answer 2

@SolomonZelman

Answer 3

@shadowfiend
@Preetha

Answer 4

I think all you have to do is to plug -5 for x into h(x) = −x − 1
h(x)=-5-1
h(x)=-6 but I'm not sure about this.

Answer 5

That's what I thought, so I'll put it and hope we're right!

Answer 6

Tell me when you submit it.

Answer 7

I have 6 more questions I'm trying to figure out before I can submit, do you think you can help?

Answer 8

I can try.

Answer 9

This is the first one.

Answer 10

I would hit both sides with a log.\[\log(1/(2\sqrt{2})=(m+2)\log4\]

Answer 11

I need to think....