Operations and scientific notation math project need to know how to find the scientific notation

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?

Rectangle pqrs has length a and width 4b. the x-axis bisects ps and qr what are the coordinates of the vertices

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2