A rock is dropped from a balloon hovering at 4800 ft above the ground. Its velocity at time t seconds is 
feet per second. Find how long it takes for the rock to reach the ground.Enter just a real number to one decimal place (no units).
Fill in the blank(s) with the appropriate word(s).
17.3
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Use the figure to find the exact value of the trigonometric function.Find cos 2?.
A. 
B. 
C. - 
D. - 
State if the vectors a and b are perpendicular, parallel, or neither. If a and b are parallel, state whether they point in the same direction or in opposite directions.a = 
, b = 
A. Parallel, same direction B. Parallel, opposite directions C. Perpendicular D. Neither
Find the intersection of the sets.{-5, -1, 3, 6} ? {-4, 0, 4, 8}
A. {0} B. {-1, 0, 3} C. ? D. {-5, -4, -1, 0, 3, 4, 6, 8}
Solve the problem.A furniture store buys 45 footstools from a distributor at a cost of $230 each plus an overhead charge of $45 per order. The retail markup is 25% on the total price paid. Find the profit on the sale of one footstool.
A. $57.50 B. $57.75 C. $57.25 D. $5775.00