Find the sum of the first n terms of the following arithmetic sequence.66, 123, 180, ...; n = 10
A. 3225
B. 2895
C. -2895
D. -1905
Answer: A
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Use a power-reducing identity to find the exact value of the expression.cos2 (-22.5°)
A. 
B. 
C. 
D. 
Factor the four-term polynomial by grouping.x3 + 9x2 + x + 9
A. (9x2 + 9)(x + 1) B. (x2 + 1)(9x + 9) C. (x2 + 1)(x + 9) D. (x2 + 9)(x + 1)
Sinclair wishes to supplement his retirement income by $400 per month for the next 14 years. He plans to obtain a reverse annuity mortgage (RAM) on his home to meet this need. Estimate the amount of the mortgage he will require if the prevailing interest rate is 11% per year compounded continuously. Please round the answer to the nearest dollar. ? $__________
Fill in the blank(s) with the appropriate word(s).
Use a table and/or a graph to decide whether the limit exists. If it exists, find its value.
f(x) , where f(x) = 
A. 5 B. Does not exist C. 154 D. 1.60944