A marine biologist is researching the population density of manatees. The marine biologist counts 350 manatees within a radius of 4 miles of a
half circle off of Crystal Bay,
What is the population density of the manatees?
Use 3.14 for pi, and round to the nearest whole number.

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?

How do i simply this radical expression?

If f(x)=3 over x+2 - square root x-3 then f(7)=