Solve the problem.A projectile is thrown upward so that its distance above the ground, in feet, after t seconds is 
After how many seconds does it reach its maximum height?
A. 36 sec
B. 18 sec
C. 14 sec
D. 28 sec
Answer: B
Mathematics
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Multiply.(-9) × 3
A. 18 B. -30 C. -18 D. -27
Mathematics
Use the Change-of-Base Formula and a calculator to evaluate the logarithm. Round your answer to three decimal places. log
73.9
A. 6.208 B. 0.081 C. 0.151 D. 12.415
Mathematics
Find an equation of an ellipse satisfying the given conditions.Vertices: (0, ±10); Length of minor axis: 6
A. 
+ 
= 10
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Translate the percent statement to a proportion.76 is 40% of 190.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Mathematics