Find the first term and the common ratio of the geometric sequence.
, 
, 
, 
, . . .
A. a1 = 
, r = 2
B. a1 = 
, r = 
C. a1 = 
, r = 
D. a1 = 
, r = 
Answer: D
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Write the number in decimal notation. ? Gross domestic product of the United States in 2007: 1.3743021 × 1013 dollars ?
A. $13,743,021,000,000 B. $1,374,302,100,000 C. $13,743,021,000 D. $137,430,210,000 E. $137,430,210,000,000
Find the indicated nth partial sum of the arithmetic sequence. 1.5, 3.1, 4.7, 6.3, ...., n = 40
a. 1,234 b. 1,308.1 c. 1,308 d. 1,307.9
Rewrite the expression using the indicated property of real numbers.Associative property of multiplication:
[(-2)(-7)](5)
A. [(-7)(-2)](5) B. (2)[(-7)(-5)] C. (-2)[(-7)(5)] D. (5)[(-2)(-7)]
Solve the problem.The table shows the population of a city over the past five years.
We used this data to develop the quadratic equation 
, which models the population of the city y in millions in the year x, where x = 0 represents 1995, x = 1 represents 1996, and so on. Use the model to find the estimated population in the year 1997.
A. 1,490,000,000,000 B. 66,822,000 C. 1,490,000 D. 65,538,000