Use a calculator to choose the equation whose graph is shown.
A. r = sin 4?
B. r = 4 sin ?
C. r = 4 cos ?
D. r = cos 4?
Answer: C
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Multiply. Write the result in the form a + bi.
? 
A. -15 B. 15i2 C. -15i D. 15
Determine a viewing window that will provide a complete graph of the function.y = 3x3 - 26x2 + 18x - 47
A. [-10, 10] by [-150, 150] B. [-5, 5] by [-500, 100] C. [-8, 10] by [-100, 300] D. [-3, 10] by [-400, 100]
Because of new, lower standards, experts in a study conducted in early 2000 projected a rise in the market for cholesterol-reducing drugs. The any market (in billions of dollars) for such drugs from 1999 through 2004 is given in the following table (
represents 1999):
Year, x199920002001200220032004Market, y10.2212.4114.8417.5720.0221.81? Find an equation of the least-squares line for these data. Please round coefficients to the nearest hundredth if necessary. Estimate the market for cholesterol-reducing drugs in 2005, assuming the trend continued. ? A. $24.52 billion B. $28.15 billion C. $27.89 billion D. $26.32 billion E. $20.11 billion
Solve the equation.2(3x - 7 ) = 4
A. {1}
B. {-3}
C. 
D. {3}