Make the letter indicated in front of the following (b) Find the sum of the cubes of the first 20 whole
numbers
in the formula t=12h Catb), excpress in
term of th anda.​

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.