Classify the real number as a natural number, whole number, integer, rational number and/or irrational number. The number may belong to more than one set.- 
A. rational number
B. integer, rational number
C. whole number, irrational number
D. irrational number
Answer: A
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Consider only the discriminant, b2 - 4ac, to determine whether one real-number solution, two different real-number solutions, or two different imaginary-number solutions exist.x2 + 3x + 7 = 0
A. Two different real-number solutions B. Two different imaginary-number solutions C. One real solution
Solve the problem.Maria and Charlie can deliver 90 papers in 3 hours. How long would it take them to deliver 111 papers?
A. 3.7 hours B. 2.4 hours C. 4.9 hours D. 333 hours
Approximate the value of the expression to 2 decimal places.tan-1(1.8) in radians
A. 29.05 B. 1.06 C. 60.95 D. 0.51
Solve the problem.Find the standard form of the equation of the circle. Assume that the center has integer coordinates and the radius is an integer. 
A. x2 + y2 - 2x + 4y - 4 = 0 B. x2 + y2 + 2x - 4y - 4 = 0 C. (x - 1)2 + (y + 2)2 = 9 D. (x + 1)2 + (y - 2)2 = 9