24x4=96
you want to multiply the cost by the number of dvd's, so in this case the cost is 24 and you have 4 dvds
You can find a common demominator and then change 8 1/4 into a mixed number and just subtract
12.25m^2 because you’re finding area
A=l•W
A=3.5•3.5
A=12.25
