Alejandro rode his bike to work at an average rate of 15 miles per hour. to go home, he put his bike on the front rack of the bus and took the bus home along the same route, traveling at an average rate of 22.5 miles per hour. if alejandro’s bike ride to work took 45 minutes, how many hours did the bus ride home take?

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?

True or false? the sum of the differences (% - 7) is never zero for any distribution consisting of n observations.