Find the exact value of the trigonometric function. Do not use a calculator.cot 
A. 
B. 1
C. -1
D. - 
Answer: C
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Solve the problem.The monthly incomes of trainees at a local factory are normally distributed with a mean of $1600 and a standard deviation $150. What percentage of trainees earn less than $1390 a month?
A. 1.40% B. 44.04% C. 91.92% D. 8.08%
Solve the problem.In a certain year a state government collected $16 billion in taxes. If the state had 10,000,000 residents, what was the per capita tax burden, or the amount that each citizen of the state paid in taxes? Round to the nearest hundred dollars.
A. $16,000 B. $160 C. $1600 D. $160,000
Subtract the polynomials.(7x4 + 4x6 + 4 + 8x5) - (-8 - 2x5 + 2x6 + 3x4)
A. 2x6 + 6x5 + 10x4 - 4 B. 2x6 + 10x5 + 4x4 + 12 C. 6x6 + 6x5 + 10x4 - 4 D. 6x6 + 6x5 + 10x4 + 12
Rewrite the given expression as a single logarithm. Assume that all variables are defined in such a way that variable expressions are positive and bases are positive numbers not equal to 1.logw (x2 - 25) - logw (x - 5)
A. 
B. logw (x + 5)
C. logw (x2 - 25)(x - 5)
D. logw 