Use the discriminant to determine the number and type of solutions of the equation.x2 + 2x + 7 = 0
A. two complex but not real solutions
B. two real solutions
C. one real solution
Answer: A
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In one state lottery, anyone who picks the correct 7 numbers (in any order) wins. With the numbers 0 through 89 available, how many choices are possible? ?
A. 7,471,375,480 B. 7,471,375,552 C. 7,471,375,553 D. 7,471,375,560
Solve the problem.The radius of a sphere is given by the formula 
, where S is the surface area. If the surface area is 14,607 square inches, what is the radius? Use 3.14 for ?, and round your answer to the nearest tenth of an inch.
A. 0 in. B. 34.1 in. C. 60.4 in. D. 107.1 in.
For the equation in the form ax2 + bx + c = 0, determine the number of real solutions by examining the graph of 
x2 + 4x + 10 = 0
A. 3 B. 0 C. 2 D. 1
Provide an appropriate response.The probability distribution for the random variable X is: 
What is the expected value of X?
A. 0.62 B. 0.26 C. 0.22 D. 0.50