An object is fired straight up with a velocity of 32 ft./s. The height (h) reached by the object at (t) seconds is given by h(t) = -8t + 32t. When does the object hit the ground? A. 8 seconds
B. 4 seconds
C. 6 seconds
D. 2 seconds

Aboat has a speed of 9 mph in calm water. it takes the boat 4 hours to travel upstream but only 2 hours to travel the same distance downstream. which equation can be used to find c, the speed of the current? 2(9 – c) = 4(9 + c) 9 + c = 4(9 – c) 9 – c = 2(9 + c) 4(9 – c) = 2(9 + c)