PLEASE HELP ME WITH THIS!!
Is the data set approximately periodic? If so, what are its period and amplitude? Determine if the data set is periodic, and if so, identify its period and amplitude.

A. not periodic
B. periodic with a period of 4 and an amplitude of about 20
C. periodic with a period of 4 and an amplitude of about 25
D. periodic with a period of 5 and an amplitude of about 25

The probability that a college student belongs to a health club is 0.3. the probability that a college student lives off-campus is 0.4. the probability that a college student belongs to a health club and lives off-campus is 0.12. find the probability that a college student belongs to a health club or lives off-campus. tip: p(a or b) = p(a) + p(b) - p(a and b) 0.54 0.58 0.70 0.82

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?

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.