Solve the problem.As part of a physics experiment, Ming drops a baseball from the top of a 315-foot building. To the nearest tenth of a second, for how many seconds will the baseball fall? (Hint: Use the formula h = 16t2, which gives the distance h, in feet, that a free-falling object travels in t seconds.)
A. 1.1 sec
B. 4.4 sec
C. 19.7 sec
D. 78.8 sec
Answer: B
Mathematics
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Subtract.23 - 8.88
A. 14.12 B. 31.88 C. 13.62 D. 14.22
Mathematics
Factor by grouping.xy + y + 9x + 9
A. (x + 9)(y + 1) B. (x + 1)(y + 9) C. (9x + 9)(y + 1) D. (x + 1)(9y + 9)
Mathematics
Find the root if it is a real number.
A. 30
B. 
C. 
D. 6
Mathematics
Solve the equation.
= 
+ 3
A. 
B. 
C. 
D. 
Mathematics