HELP A spherical tank has a radius of 6 ft. Frankie filled the tank with gasoline at a rate of 23 cubic feet per minute. At this rate how long will it take Frankie to completely fill the tank without it overflowing?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.