The following table shows the length and width of two rectangles:
length width
rectangle a x + 8 x − 1
rectangle b 4x + 5 3x − 2
which expression is the result of the perimeter of rectangle b minus the perimeter of rectangle a?
a. 10x − 12
b. 18x + 32
c. 10x − 8
d. 18x + 6

Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?