D Question 56
1 pts
A pipefitter must install a 4" stainless steel pipe between two tanks in separate buildings through a tunnel
system. The horizontal run of the tunnel is 756. How many lengths of 21' stainless steel pipe are needed?

2xy/9 is the answer to this problem

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.