Karen dropped a ball from different heights. This table shows the height from wich she dropped the ball and the height of the balls first bounce. What was the average rate of of change in the bounce height as drop height changed from 20 inches to 60 inches. A.0.90 B.0.85 C.0.60 D.0.25

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11