Please I need this ASAP number 6

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?

What is the order of magnitude for the number of liters in a large bottle of soda served at a party

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4