Complete the identity.sin 4x sin 6x cos 4x cos 6x = ?
A. 
B. 
C. cos2 48x
D. 
Answer: A
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Solve the problem.If you magically quadrupled in size, by what factor has your weight increased?
A. 16 B. 4 C. 64 D. 3
Use Newton's method to find an approximate answer to the question. Round to six decimal places.Where are the inflection points of f(x) = 
x4 + 
x3 - 10x2 + 4 located?
A. x ? -1.806486, 1.238586 B. x ? -1.555252, 0.988586 C. x ? -1.694141, 0.627475 D. x ? -1.805252, 0.738586
Solve the problem.Richard plans to retire 35 years from now, and has a goal to have $650,000 in his retirement savings account by that time. What should he contribute monthly, assuming the APR is 6.6% compounded monthly. Contributions are made at the end of the month, including the last month. Round your answer to the nearest cent.
A. $426.96 B. $368.86 C. $406.17 D. $396.74 E. $357.11
In the following group of computations, one answer is wrong. Use estimation to explain which answer is incorrect.
?
?
?
?
?
1.262 2.7 459.0501
What will be an ideal response?