What is the inverse of the function f(x)=x+1/x

a)f^-1x=x/x=1
b) f^-1(x)=1/x-1
c)f^-1(x)=x-1/x+1
d) f^-1(x)=x/x-1

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

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?