Find the domain of the function of two variables.f(x, y) = 
+ 
A. {(x, y)| x ? 0 and y ? 0 and y ? 5}
B. {(x, y)| y ? 0 and y ? 5}
C. {(x, y)| y ? 0 and y ? -5}
D. {(x, y)| x ? 0 and y ? 5}
Answer: B
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Answer each question appropriately.How many curves y = f(x) have the following properties? i. 
= 7x ii. The graph passes through the point (0,3) and has a horizontal tangent at that point.
A. 0 B. 2 C. Infinitely many D. 1
Rewrite the series using the new index j as indicated.
= 
A. 
B. 
C. 
D. 
A child has an enormous jar in which she has been saving all of her spare change. In order to determine exactly how much money she has in the jar, she dumps all of the coins on the floor and counts them. Under the watchful eye of her mother, she counts 180 pennies, 120 nickels, 100 dimes, and 80 quarters.The data collection method used in this example is called
A. a census. B. a controlled study. C. a survey. D. random sampling. E. none of these
Provide an appropriate response.A major advantage to using an escrow account is:
A. all of these apply to escrow B. it assures the lending agency that property taxes and insurance will be paid in a timely fashion C. the borrower is not required to include an amount for property taxes and insurance each month with their mortgage payment D. the monthly mortgage payment will be reduced by the tax and insurance payment