Solve the problem.The area of a circle with radius r is given by the function A(r) = ?r2. Find the area of the base of a circular storage tank if the radius is 5 feet long. Use ? ? 3.14.
A. 78.5 square feet
B. 15.7 square feet
C. 31.4 square feet
D. 75 square feet
Answer: A
Mathematics
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Complete.21 mg = 
mcg
A. 2100 B. 21,000 C. 0.021 D. 0.21
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Determine the domain and range of the relation.{(10, -3), (10, -8), (-3, 2), (-4, 3), (-8, 9)}
A. Domain: {10, -10, -3, -8, -4}; Range: {-8, 2, 9, 3, -3} B. Domain: {10, 10, -3, -8, -4}; Range: {-8, 2, 9, 3, -3} C. Domain: {10, -3, -8, -4}; Range: {-8, 2, 9, 3, -3} D. Domain: {-8, 2, 9, 3, -3}; Range: {10, 10, -3, -8, -4}
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Use the discriminant to determine the number of real solutions.25x2 + 10x + 1 = 0
A. One real solution B. Two real solutions C. No real solutions
Mathematics