A. The water level in a reservoir increased 52 meters. If this was a 23% increase, what was the initial depth? B. The price of a jacket was reduced from $84 to $63. By what percentage was the price of the jacket reduced?

C. After a 25% discount, the price of a T-shirt was $12. What was the price before the discount?

I know the answers(don't now if there right) but i have to figure out how to do them please help.

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.