Determine whether the given sequence is arithmetic, geometric, or neither. If the sequence is arithmetic, find the common difference; if it is geometric, find the common ratio.3, 5, 8,12, ...
A. Geometric; r = 3
B. Geometric; r = 9
C. Arithmetic; d = 3
D. Neither
Answer: D
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Solve by graphing.The value y (in hundreds of dollars) of Juan's computer is approximated by the linear equation 
where x is the number of years since he first bought the computer. Graph the equation and use the graph to estimate the value of the computer 2 years after it was purchased. 
A. $900 B. $760 C. $600 D. $700
Find the domain and the range of the relation.
A. domain: (-?, -6] ? [6, ?) range: (-?, ?) B. domain: (?, -?) range: (-?, -6] ? [6, ?) C. domain: (-?, ?) range: (-?, -6] ? [6, ?) D. domain: (-?, -6] ? [6, ?) range: (?, -?)
Write the first five terms of the geometric sequence with the given information.an = 4an-1; a1 = 5
A. 4, 20, 80, 320, 1280 B. 5, 9, 13, 17, 21 C. 20, 80, 320, 1280, 5120 D. 5, 20, 80, 320, 1280
Solve the problem.A college student invests $9000 in an account paying 
per year compounded annually. In how many years will the amount at least double? Round to the nearest tenth when necessary.
A. 28 yr B. 17.7 yr C. 31.9 yr D. 23.4 yr