Ricardo throws a stone off a bridge into a river below. The stone's height (in meters above the water), xxx seconds after Ricardo threw it, is modeled by
w(x)=-5(x-8)(x+4)w(x)=−5(x−8)(x+4)w , left parenthesis, x, right parenthesis, equals, minus, 5, left parenthesis, x, minus, 8, right parenthesis, left parenthesis, x, plus, 4, right parenthesis
How many seconds after being thrown will the stone reach its maximum height?

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. complete this item. (enter letter variables in alphabetical order.) write 3a^2b^3c^5/8x^4y^3z using no denominator. (fraction line is necessary. use for multiplication between numbers.)