Find the measure of the central angle of an arc if its length is 14pi and 18 is the radius.

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

How do i do this activity, is appreciated

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?