Charmaine's coffee shop makes a blend that is a mixture of two types of coffee. type a coffee costs charmaine $5.75 per pound, and type b coffee costs $4.55 per pound. this month's blend used four times as many pounds of type b coffee as type a, for a total cost of $526.90. how many pounds of type a coffee were used?

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?