Test scores are normally distributed with a mean of 500. Convert the given score to a z-score, using the given standard deviation. Then find the requested percentage.Find the percentage of students who score below 635 if the standard deviation is 90.
A. 6.68%
B. 90%
C. 93.32%
D. 56.68%
Answer: C
Mathematics
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Rewrite the expression in terms of exponentials and simplify the results.cosh 9x + sinh 9x
A. e9x - e-9x B. e9x C. 2e9x D. 9x
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Find the points of inflection.f(x) = 2x3 - 9x2 + 12x
A. 
B. 
C. 
D. No points of inflection exist
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List the first n terms of the geometric sequence satisfying the given conditions.a1 = 
, r = -9, n = 4
A. 
, - 
, 
, - 
B. 
, - 
, - 
, - 
C. 
, - 
, - 
, - 
D. 
, - 
, 
, - 
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Find the sizes of A, B,C and D.
Mathematics