1) a group of 22 students need to form a line of exactly 9 students. student a and student b need to be either the fifth or sixth in line.
is this arrangement of students a permutation or combination? justify your selection.

It is saturday morning and jeremy has discovered he has a leak coming from the water heater in his attic. since plumbers charge extra to come out on the weekends, jeremy is planning to use buckets to catch the dripping water. he places a bucket under the drip and steps outside to walk the dog. in half an hour the bucket is 1/5 of the way full. what is the rate at which the water is leaking per hour?

A50% increase followed by 33 1/2% decrease

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585