Provide an appropriate response.
Find the area of the shaded region: 
A. 65.85 ft2
B. 58.88 ft2
C. 50.93 ft2
D. 57.90 ft2
Answer: C
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?Gas costs $3.10 a gallon. Which of the following represents the function that expresses the independent variable as a function of the dependent variable? ?
A. ?x = 3.1y, where y is the independent variable and x is the dependent variable. B. ?y = 3.1x, where x is the independent variable and y is the dependent variable. C. ?y = 3.1x, where y is the independent variable and x is the dependent variable. D. ?y = 3.1, where y is the independent variable and the dependent variable. E. ?None of the above.
Solve the problem.A square yard has a 6-foot wide sidewalk around a square lawn. If the sides of the yard, including the sidewalk, have length y, find a polynomial that gives the area of the sidewalk.
A. 12y - 36 B. 24y + 144 C. 12y + 144 D. 24y - 144
Solve the problem.Find the number of units that must be produced and sold in order to yield the maximum profit, given the following equations for revenue and cost:R
= 7xC
= 0.001x2 + 1.1x + 40.
A. 2950 units B. 4050 units C. 5900 units D. 8100 units
Fill in the missing numbers.
A. a = 7 B. a = 8 C. a = 5 D. a = 6