What is the angle "d" please???

The area of a 25-inch tv screen is 300 square inches. the area of a 40-inch tv screen is 768 square inches. the are of the smaller screen is what percent of the area of the larger screen?

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?