You throw your ball into the air from a height of 4.2 feet with an initial vertical velocity of 24 feet per second. Use the vertical motion model, h = - 16t ^ 2 + vt + s , where v is the initial velocity in feet per second and s is the height in feet , to calculate the maximum height of the ball. Round your answer to the nearest tenth if necessary . Maximum height : feet

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.