Ineed this

an environmental equipment supplier sells hemispherical holding ponds for treatment of chemical waste. the volume of a pond is v1=1/2(3/4πr1^3), where r1 is the radius in feet. the supplier also sells cylindrical collecting tanks. a collecting tank fills completely and then drains completely to fill the empty pond. the volume of the tank is v2=12πr2^2, where r2 is the radius of the tank.

a. since v1=v2, write an equation that shows r1 as a function of r2. write an equation that shows r2 as a function of r1.

b. you want to double the radius of the pond. how will the radius of the tank change?

(co 3) the times that customers spend in a book store are normally distributed with a mean of 39.5 minutes and a standard deviation of 9.4 minutes. a random sample of 25 customers has a mean of 36.1 minutes or less. would this outcome be considered unusual, so that the store should reconsider its displays? no, the probability of this outcome at 0.035, would be considered usual, so there is no problem yes, the probability of this outcome at 0.035, would be considered unusual, so the display should be redone no the probability of this outcome at 0.359 would be considered usual, so there is no problem yes, the probability of this outcome at 0.965 would be considered unusual, so the display should be redone