What is 4 x 1 1/2 x 2

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122

Jane has 5 nickels.john has 3 dimes.jane says she has a greater amount of money.with the information given,is she correct?