Please help I will mark brainliest

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

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5

Math it's appreciated. (picture provided)