Me and my best friend are doing a project in math and we each have to go through and do one problem. The only thing is I don’t know how to correct this one. Can someone help?

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

Measures of the angle of r, 31 s (x+4) t (3x+9)

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