Solve the problem.After being struck with a hammer, a gong vibrates 21 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. 84 vibrations
B. 94 vibrations
C. 23 vibrations
D. 28 vibrations
Answer: A
Mathematics
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Perform the indicated operation and simplify if possible.
A. 4
B. 
C. 4
D. 16
Mathematics
Blood PressureFrequency80-998100-11947120-13920140-1594160-1790180-1991If you were to graph this data set, would it be approximately a normal distribution?
A. if the data was more spread out it would B. cannot tell C. yes D. no
Mathematics
The function graphed is of the form 
or 
where d is the least possible positive value. Determine the equation of the graph.
A. sin x - 
B. sin 
C. cos 
D. sin 
Mathematics
Write the sentence as an equation. Use x to represent "a number."Nine times the difference of 9 and a number amounts to -36.
A. 9(9) - x = -36 B. 9(x - 9) = -36 C. 9x - 9 = -36 D. 9(9 - x) = -36
Mathematics