Does anyone got the answers to geometry a unit 4 lesson 3

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?

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Triangle knm is what is true about the sides of knm