What is the surface area of the right cone with a height of 16 in and a radius of 8

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?