sam's dog eats 20 pounds of dog food in 50 days how long will it take sam's dog to eat 40 pound bag of dog food? ( i mess up on my other question)

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.

The total would be 40.53