Aplayground area is a circular with a diameter of 32 feet. what is the area of the playground? round your answer to the nearest tenth.

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"