10 ercise 145 Tawish is .x years old now a) How old was he7 years ago? b) How old will he be in 15 years from now c) IThis age in 15 years time will be the times his age 7 years ago, how old is he now? ​

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

Acylinder has volume 45π and radius 3. what is it’s height?

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).