Solve the problem.Suppose that a weight on a spring has an initial position of 
inches and a period of 
Find a function 
that models the displacement of the weight.
A. s(t) = 6 cos (2?(2.5)t)
B. s(t) = 6 cos (2?(0.4)t)
C. s(t) = 12 cos (2?(0.4)t)
D. s(t) = 12 cos (2?(2.5)t)
Answer: B
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Expand, where i2 = -1.(5 + i)4
A. 480 + 776i B. 776 + 520i C. 520 + 776i D. 476 + 480i
Graph the polynomial function. f(x) = x5 - 4x3 - 45x
A. 
B. 
C. 
D. 
The figure shows the graphs of the cost and revenue functions for a company that manufactures and sells binoculars. Use the information in the figure to answer the question.
What is the profit when 882 binoculars are produced?
A. $5028 B. $2028 C. $3264 D. $264
Use a graphing calculator to plot the data and find the quadratic function of best fit.A small manufacturing firm collected the following data on advertising expenditures (in thousands of dollars) and total revenue (in thousands of dollars). Find the quadratic function of best fit. Round values to the nearest thousandth. 
A. R(x) = -0.310x2 + 2.631x + 6128.455 B. R(x) = -0.0242x2 + 7.139x + 6209.323 C. R(x) = -0.015x2 + 4.536x + 6123.841 D. R(x) = -0.091x2 + 5.952x + 6337.167