3packeges for $1.29 what is that one package has

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

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?

Can someone me out here and the tell me the greatest common factor