Use an associative property to complete the statement.(8x + 9y) + 6z = 
A. (9y + 8x) + 6z
B. 8x + 9y + 6z
C. 8x + (9y + 6z)
D. (8x + 9y + 6z)
Answer: C
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Provide an appropriate response.When any nonzero number is divided by 0, the result is 
.
A. 0 B. impossible to compute C. the nonzero number D. 1
Solve the equation using the quadratic formula.
Round your answer to three significant digits.
A. x1 = 0.11, x2 = - 0.15 B. x1 = 1.14, x2 = - 1.47 C. x1 = 1.03, x2 = - 1.58 D. x1 = 1.15, x2 = - 1.46 E. x1 = 1.25, x2 = - 1.36
Solve the problem.Suppose a rumor starts among 2 people in an office building. That is, y0 = 2. Suppose 400 people work in the building and 40 people have heard the rumor in 3 days. Write an equation for the number who have heard the rumor in t days. Assume that the rate of spread of the rumor satisfies the logistic equation: 
= k
y, where N is the size of the population and y is the number who have heard the rumor after t days.
A. y = 
B. y = 
C. y = 
D. y = 
Solve the problem.The value of a particular investment follows a pattern of exponential growth. In the year 2000, you invested money in a money market account. The value of your investment t years after 2000 is given by the exponential growth model 
. By what percentage is the account increasing each year?
A. 6.9% B. 7.1% C. 7.4% D. 7.3%