At chengs bike rentals, it cost $42 to rent a bike for 9 hours. How many dollars does it cost per hour of bike use? (Round to nearest hundredth.)

20 only answer if 100% sure most high school-aged teens are very active. a. true b. false

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.