Write an expression for the general or nth term, an, for the geometric sequence.-2, 6, -18, 54, . . .
A. an = -2 ? (-3)n-1
B. an = 2 ? (-3)n
C. an = -2 ? 3n
D. an = 2 ? (-3)n-1
Answer: A
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You want to invest in an account that pays an annual interest rate of r, as a decimal. The amount P, in dollars, you need to invest so that $4593 per year can be withdrawn each year for 10 years is given by
.
A. Make a graph of P versus r. Include interest rates from 0.1 to 0.9.B. Is the graph concave up or concave down?C. Explain in practical terms the meaning of the concavity of the graph.
What will be an ideal response?
Solve the problem using inductive reasoning.Find the 18th square number that corresponds to the following dot sequence.
A. s18 = 36 B. s18 = 324 C. s18 = 361 D. s18 = 171
Translate to a proportion. Do not solve.What is 46% of 70?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Solve the problem.The number of non-text books read by college students ranges from 9 to 49. Using B as the variable, write an absolute value inequality that corresponds to this range.
A. 
? 20
B. 
? 9
C. 
? 29
D. 
? 40