Solve the problem.Suppose that R ={(x, y): 0 ? x ? 2, 0 ? y ? 5},R1 = {(x, y): 0 ? x ? 2, 0 ? y ? 4}, andR2 = {(x, y): 0 ? x ? 2, 4 ? y ? 5}. Suppose, in addition, that
dA = 5, 
dA = 5, and 
dA = 2.Use the properties of integrals to evaluate 
dA.
A. 16
B. 70
C. 30
D. 11
Answer: B
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How many subsets and proper subsets are in the given set?the set of natural numbers less than 10
A. 511, 512 B. 510, 511 C. 512, 511 D. 511, 510
Solve the problem.Charlene baby-sits for $10 per hour. She also works as a tutor for $12 per hour. Because of school, her parents only allow her to work 13 hours per week. How many hours can Charlene tutor and baby-sit and still make at least $75 per week? (a) Write a system of inequalities for this situation.(b) Graph the solution set. 
What will be an ideal response?
Write the words for the dollar amount as you would on a check.$70.43
A. Seventy dollars and 
B. Seventy 
dollars
C. Seventy and 
dollars
D. Seventy dollars and 43 cents
Find the midpoint of the line segment joining the points A and B.A = (5y, 1); B = (6y, 2)
A. 
B. 
C. (11y, 3)
D. (y, 1)