No links I need the full answer of the area to this trapezoid

I got 96, but I also got 28, I think it’s 96, the formula is A=(b,b2)h so A=1/2(8,6)4

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.