Can you simplify (3xy^2)(4xy)(2xy)^3

Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars

17 in long 1.3 ft wide and 8in high what is the volume

What percent of 18 is 24? and plz explain thx.