2. The spoke of Mr. Jorian's bicycle wheel is 15 inches. The wheels on a child's tricycle have a radius of 6 inches. What is the approximate difference in the circumferences of
the two wheels? Round your answer to the nearest tenth of an inch.

Find the volume v of the solid obtained by rotating the region bounded by the given curves about the specified line. y = x â’ 1 , y = 0, x = 5; about the x-axis v = sketch the region. sketch the solid, and a typical disk or washer.

Which expression can be used to find the cost of .75 kilogram of cheese at the price of $6.40 per kilogram?

Students are getting signatures for a petition to increase sports activities at the community center. the number of signatures they get each day is 3 times as many as the day before. the expression 3^6 represents the number of signatures they got on the sixth day. how many signatures did they get on the first day?