The highest point in Florida is 1,423 feet above sea level. The lowest point is 154 feet below sea level. What is the difference in elevation?

No i refuse to tell you the answer but the estimate is 10

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.