SOMEONE HELP PLS ILL GIVE YOU A KISS OR SOMETHING Vita wants to Buy a new dress that costs $89.00 she has a coupon for 20% off. which expression could be used to find the final cost of the dress?

a) 89-20

b) 89+20

c) 89-20 (89)

d) 89-0.20 (89)​​

Idon’t know what the answer is i wish i could

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.