Logan has two aquariums. One aquarium contains 1.6 cubic feet of water and the other contains 1.3 cubic feet of water. The water in the larger aquarium weighs 18.72 pounds more than the water in the smaller aquarium. Complete the equation with a variable on both sides to represent the situation. Use x to represent the weight of 1 cubic foot of water. Then find the weight of 1 cubic foot of water.

What’s your 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.