20 POINTS !! A ball is thrown vertically upward. After t seconds, its height h (in feet) is given by the function h(t) = 16t^2-45t After how long will it reach its maximum height? Round your answer to the nearest hundredth of a second.

Choose the triangle with x equal to 17.

Simplify 6sin θsec θ. choices a) 6 tan θ b) 6 cos θ c) 6 cot θ d) 6

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.