Solve the problem.The world population of a certain species is evaluated at 2.3 × 106. By some projections, this population will be 6 times more important in 30 years. Express the population at that time in scientific notation.
A. 138 × 106
B. 13.8 × 107
C. 1.38 × 109
D. 1.38 × 107
Answer: D
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Determine if the relation is a function. Assume x is the independent variable.{(-1, 6), (1, 4), (4, 2), (7, -2)}
A. Yes B. No
Provide an appropriate response.Which is an example of a term with numerical coefficient 2?(a) x2 (b) 2x7y (c) 22x2 (d) 
Fill in the blank(s) with the appropriate word(s).
Solve the problem.The owner of a video store has determined that the profits P of the store are approximately given by 
where x is the number of videos rented daily. Find the maximum profit to the nearest dollar.
A. $4900 B. $9852 C. $9800 D. $4952
Find the domain of the rational expression.
A. {x|x is a real number and x ? 7} B. {x|x is a real number} C. {x|x is a real number and x ? 3} D. {x|x is a real number and x ? 3 and x ? 7}