Tom invests $10,000 in a savings account that offers 3.5 percent interest, compounded continuously.
in 10 years tom will have earned $ in interest, and in years the investment will double. (use the rule of 70 where required.)

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?