Ed is 8 years older than his brother john. five years ago, ed was 3 times as old as john. find their present ages

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8

What is the shape of the height and weight distribution

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.