Evaluate the following expression for the given value of the variable.
?
for 
?
A. 
B. 
C. 
D. 
E. 
Answer: D
Mathematics
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Solve the problem.Suppose that for a particular brand of computer, the average lifespan is 90 months with a standard deviation of 9 months. If a computer lasts for 95 months, what is the z-score for the lifespan of the computer?
A. 0.71 B. 0.56 C. 0.61 D. 0.81
Mathematics
Solve the inequality.x2 - 9x + 20 > 0
A. x > 5 B. x < 4 or x > 5 C. 4 < x < 5 D. x < 4
Mathematics
Use Fundamental Identities and/or the Complementary Angle Theorem to find the exact value of the expression. Do not use a calculator.tan 55° - 
A. 0 B. -1 C. 2 D. 1
Mathematics
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = - 
, 
< ? < 2?Find sin(2?).
A. - 
B. 
C. 
D. - 
Mathematics