Ike and Brian live in a tall apartment building. Ike’s bedroom window is 52 feet above the ground. Brian's bedroom window is 79 feet above the ground. Which expression represents the distance, in feet, between their windows? A |52-79|
B |52+79|
C 52-79
D 52+79
Pleas help! this test is due in 10 minutes!

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes

If a is a nonzero real number then the reciprocal of a is

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.