SOMEONE HELP ME PLEASE

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?