Use the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the sequence with the given first term, a1, and common ratio, r.Find a8 when a1 = 20,000, r = -0.1.
A. -0.02
B. 0.0002
C. -0.002
D. 0.002
Answer: C
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Solve the problem.Let y(t) be the population of a species of plant that is being harvested, for t ? 0. Consider the harvesting model 
where h is the annual harvesting rate, y0 is the initial population of the species, and t is measured in years. If y0 = 5000, what harvesting rate should be used to maintain a constant population of y = 5000, for t ? 0?
A. h = 5000 yr-1 B. h = 10 yr-1 C. h = 100 yr-1 D. h = 25 yr-1
Use the figure below to answer the following question(s).
Vertex D is adjacent to
A. vertex A, B, and C only. B. vertex B and vertex C only. C. every other vertex. D. vertex B, C, E, F only. E. none of these
Solve the problem.The formula y = 
models the average cost per unit, y, for Electrostuff to manufacture x units of Electrogadget IV. How many units must the company produce to have an average cost per unit of $410?
A. 147 units B. 127 units C. 149 units D. 116 units
Perform the requested operation or operations. Find the domain of each.f(x) = 
, g(x) = 
Find (f + g)(x).
A. 3x; domain: (-?,?)
B. 
+ 
; domain: 
C. 
; domain: [0,?)
D. x
; domain: (-?,?)