Solve the problem. Round to the nearest tenth, if necessary.If an object is propelled upward from a height of 144 feet at an initial velocity of 128 feet per second, then its height h after t seconds is given by the equation 
After how many seconds does the object hit the ground?
A. 4.5
B. 11
C. 8.0
D. 9
Answer: D
Mathematics
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Use the bar graph to answer the question.The bar graph illustrates the numbers of certain grades earned in Mathematics 100. How many more C grades were earned than A grades?
A. 3 B. 2 C. 4 D. 5
Mathematics
Estimate the sum or difference by first rounding to the nearest ten.84
A. 200 B. 180 C. 170 D. 177
Mathematics
Divide and write in standard form.
A. 
- 
i
B. 
- 
i
C. - 
- 
i
D. - 
- 
i
Mathematics
List the potential rational zeros of the polynomial function. Do not find the zeros.f(x) = 5x4 - x2 + 2
A. ± 
, ± 
, ± 1, ± 5
B. ± 
, ± 
, ± 1, ± 2
C. ± 
, ± 
, ± 1, ± 2, ± 5
D. ± 
, ± 
, ± 1, ± 2, ± 5
Mathematics