At a construction site, a builder plans to cut down an 8-foot- by-9-foot piece of plywood. She plans to discard any pieces
that she cuts off. She keeps an exactly 7-foot-by-6-foot area
of the plywood. What is the area, in square feet, of the
pieces of plywood that are discarded?

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?

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?