The drop that riders experience on Dr. Doom's Free Fall can be modeled by the quadratic function, h(t) + -9.8t^2 - 5t = 39 where h is height in meters and t is time in seconds. (a) What is the starting height of the riders?

(b) According to the function, when will the height of the riders equal 0? Round to the nearest tenths place.

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.