Simplify the expression. Assume that all variables are positive when they appear.3
+ 
A. 3
+ 
B. 4
C. 6
D. 5
Answer: D
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Solve the problem.If an object is propelled upward with an initial velocity of 56 feet per second, then its height in feet after t seconds is given by h = 56t - 16t2. After how many seconds will the object reach its maximum height? Round your answer to the nearest tenth.
A. 0.9 seconds B. 0.6 seconds C. 1.8 seconds D. 1.4 seconds
Completely factor the polynomial.5a3 + 15a
A. 5a2(a + 3) B. 5a(a2 + 3a) C. 5a(a2 + 10a) D. 5a(a2 + 3)
Perform the indicated operations and simplify the result. Leave the answer in factored form.
? 
A. 
B. 
C. 
D. 
For the given equation, state whether the directrix is vertical or horizontal and give its location in relation to the pole.r = 
A. Vertical, 4 units to the left of the pole B. Horizontal, 8 units below the pole C. Vertical, 8 units to the left of the pole D. Horizontal, 4 units below the pole