Find the area of the circle with the given radius or diameter. Use ? ? 3.14.r = 8.5 in.
A. A ? 907.46 in.2
B. A ? 106.76 in.2
C. A ? 53.38 in.2
D. A ? 226.865 in.2
Answer: D
Mathematics
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Use the properties of equality to solve the equation.
= 
A. 
B. {4}
C. 
D. 
Mathematics
Solve the system of equations by elimination.
A. x = -2, y = 8; (-2, 8) B. x = 12, y = -12; (12, -12) C. x = 8, y = -8; (8, -8) D. x = -8, y = 8; (-8, 8)
Mathematics
Solve the problem.Find the area of a sector of a circle of radius 10 inches formed by a central angle of 60°. Round your answer to two decimal places.
A. 5.24 sq in. B. 52.36 sq in. C. 10.47 sq in. D. 104.72 sq in.
Mathematics
Solve the problem.A particular substance decays in such a way that it loses half its weight each day. How much of the substance is left after 8 days if it starts out at 64 grams?
A. 
g
B. 
g
C. 4 g
D. 2 g
Mathematics