Maddy's soccer team played 20 games in 2019 and then played 16 games in 2020. What was the percent decrease in the number of games Maddy's team played?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Solve the equation x/4 - 5= -8 -27 -12 -7 12

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).