Find (-0.5,0)(3,0) from solutions to quadratic equation

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds

(x-5)1/2+5=2 what is possible solution of this equation