Write the domain of the rational function in interval notation.f(x) = 
A. (-?, -7) ? (-7, ?)
B. (-?, -8) ? (-8, ?)
C. (-?, -7) ? (-7, 8) ? (8, ?)
D. (-?, 8) ? (8, ?)
Answer: D
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Evaluate.
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Work the application and answer with a complete sentence.In a biology experiment, a scientist collected 6409 mosquitoes in a rural field and 2174 mosquitoes in an urban area. How many mosquitoes did she collect in all?
A. She collected 5272 mosquitoes in all. B. She collected 8583 mosquitoes in all. C. She collected 8236 mosquitoes in all. D. She collected 4235 mosquitoes in all.
Solve.A calculator has a purchase price of $20. If the sales tax on this purchase is $1.70, find the sales tax rate.
A. 0.085% B. 0.078% C. 0.915% D. 8.5%
Find the sum of the given infinite geometric series if possible. Write the answer as a decimal number if appropriate.18 + 3 + 
+ 
+ . . .
A. 24 B. 22.6 C. 21.6 D. 21.1