Complete the identity.sin (4?) = ?
A. cos3 ? - 3 sin2 ? cos ?
B. 4 sin ? cos3 ? - 4 sin3 ? cos ?
C. 1 - 8 sin2 ? cos2 ?
D. 3 sin ? - 4 sin3 ?
Answer: B
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Decide whether the statement makes sense. Explain your reasoning.Steve is planning to open a savings account either at Quarterly Bank or at Daily Bank. Quarterly Bank is offering an APR of 6% compounded quarterly, which is clearly the better deal since Daily Bank is offering an APR of 6% but with daily compounding.
What will be an ideal response?
Solve the equation for the unknown quantity.5x + 5 = 4x + 14
A. 11
B. 
C. 1
D. 9
Use the compound interest formula to determine the accumulated balance after the stated period. Assume that interest is compounded annually.$8000 is invested at an APR of 3.1% for 5 years.
A. $249.50 B. $1240.00 C. $9319.30 D. $9039.09
Decide whether the statement makes sense. Explain your reasoning.Sheila is in the 28% tax bracket, so a 
charitable contribution will reduce her total tax bill by 
What will be an ideal response?