What is the probability of choosing a blue or green marble? There’s 5 green, 6 blue, and 9 red marbles.

A. 5/11
B.11/20
C. 6/11
D. 5/20
E. 6/20

How do i work this problem out using the equation a=pe^rt

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Joe has a rectangular chicken coop. the length of the coop is 4 feet less than twice the width. the area of the chicken coop is 510 square feet. what is the length of the chicken coup?