A bottle rocket is launched from a platform. The function h(t) = 2+90t-16t^2 models the height ( in feet ) after t seconds.

a) What is the maximum height the rocket reaches?

b) How many seconds does it take to reach the maximum height?

In triangle abc segment de is parallel to the side ac . (the endpoints of segment de lie on the sides ab and bc respectively). find de, if ac=20cm, ab=17cm, and bd=11.9cm;

Match each function with its rate of growth or decay

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)