The radius of a basketball hoop is 9 inches. which expression can be used to find the hoop's circumference in inches?
(a)π ⋅ 9^2

(b)9/π

(c)9 ⋅ π

(d)2 ⋅ 9 ⋅ π

The sat and act tests use very different grading scales. the sat math scores follow a normal distribution with mean 518 and standard deviation of 118. the act math scores follow a normal distribution with mean 20.7 and standard deviation of 5. suppose regan scores a 754 on the math portion of the sat. how much would her sister veronica need to score on the math portion of the act to meet or beat regan's score?