12. Determine whether each of these functions from Z to Z is one-to-one. a) fen) = n - 1 c) fen) = n3 b) fen) = n 2 + 1 d) fen) = rn/21 13. Which functions in Exercise 12 are onto?

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

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

If my mom gets $13.05 an hour, and she works from 3: 30 to 10: 45 in the morning, how much money does my mom make?