Write the sum without sigma notation and evaluate it.
A. -cos 2? + cos 4? - cos 6? = -1
B. cos 2? - cos 4? + cos 6? = - 1
C. cos 2? + cos 6? = 2
D. cos 2? - cos 4? + cos 6? = 1
Answer: D
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Find the standard deviation s for the given data. Round your answer to one more decimal place than the original data.The manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The frequency distribution below summarizes the results. Find the standard deviation. Round your answer to one decimal place. 
A. 5.2 B. 5.4 C. 5.7 D. 7.0
Solve the equation. Give an exact solution.ln(5x - 2) = ln 12 - ln(x - 6)
A. no solution
B. 6, 
C. 
D. 0, 
Evaluate.Find (f + g)(-1) when f(x) = x + 5 and g(x) = x + 2.
A. -9 B. 1 C. 5 D. -5
One pyramid has a volume of 356 
. A larger pyramid has base edges twice as long as that of the first pyramid and a height that is 3 times the height of the first pyramid. What is the volume of the larger pyramid?
What will be an ideal response?