Aball is thrown vertically upwards. after t seconds, his height (in feet) is given by the function h(t)=104t-16t^2. after how long will it reach its maximum height?

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!