I’m stumped, giving 20 points and brainliest to whoever can help me out please!

Aheated 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?

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.