.90 is the answer...just to be clear for the people who just skim
Answer:
a. 20
Step-by-step explanation:
just multiply 5 and $4 by 4
P+ p(.08)= 51.84
p is the original price of the item
if you take 51.84 which is the total amount after taxes are added and divide it
by 1+tax you will get the original price
so if p + p(.08)=51.84 then 51.84/1.08= p
p =48
48+ 48(.08)=51.84
169 since it is a square so all sides are equal and 52 divided by 4 is 13 then 13 times 13 is 169.