Given matrices A = 
, B = 
, and C = 
, decide if the statement is true or false.AB = BA.
A. True
B. False
Answer: B
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Find the slope of the line.Determine the slope of the line through the points (9, -7), (9, 4)
A. - 
B. 11
C. Undefined
D. - 
Solve the problem.A survey of the interest rates earned by Certificates of Deposit (CDs) showed the following percents for the length of time (in years) for holding the CD. Let length of time represent the independent variable and interest rate represent the dependent variable. Use a graphing utility to draw a scatter diagram and to find the line of best fit. What is the estimate of the interest rate for a CD held for 30 years (to the nearest thousandth)? 
A. 8.669 B. 8.675 C. 8.874 D. 9.064
Solve the problem.Suppose that the population of a certain city during a certain time period can be modeled with the function, P(x) = -0.1x5 + 3.2x4 + 5000, where x is time in years since 1960. By sketching a graph of P(x), estimate during what time period the population of the city was increasing.
A. Between 1960 and 1986 B. Between 1960 and 1973 C. Between 1965 and 1986 D. Between 1986 and 1992
Use a calculator to find ? to the nearest tenth of a degree, if 
and
?
with ? in QIII
?
__________
Fill in the blank(s) with the appropriate word(s).