Solve the problem.After being struck with a hammer, a gong vibrates 54 vibrations in the first second and in each second thereafter makes 
as many vibrations as in the previous second. Find how many vibrations the gong makes before it stops vibrating.
A. 388 vibrations
B. 58 vibrations
C. 63 vibrations
D. 378 vibrations
Answer: D
Mathematics
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Convert the Hindu-Arabic numeral to Chinese.3057
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.An observer to a rocket launch was 800 ft from the take-off position. The observer found the angle of elevation of the rocket as a function of time to be 
Therefore, the height h (in ft) of the rocket was 
Find the time rate of change of height at 
A. 240 ft/s B. 400 ft/s C. 1100 ft/s D. 6700 ft/s
Mathematics
Find the real solutions of the equation.
= 4
A. 
B. 
C. {16}
D. {4}
Mathematics
Divide. Express the quotient as a mixed number in lowest terms. 32 ÷ 1
A. 24
B. 22
C. 25
D. 23
Mathematics