1. What expression is modeled?
O A.2.3 + 2.5
O B.2.5 x 2.3
O 0.4 2.5
OD. 1.5 x 1.3

It is going to be the third choice

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.