Use the discriminant to find what type of solutions (two rational, two irrational, one rational, or two nonreal complex) each of the following equations has. Do not solve the equation.x2 + 5x - 5 = 0
A. two rational solutions
B. one rational solution
C. two nonreal complex solutions
D. two irrational solutions
Answer: D
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Solve the problem.A tank is designed by revolving the parabola y = 5x2, 0 ? x ? 2, about the y-axis. The tank, with dimensions in meters, is filled with water weighing 
How much work will it take to empty the tank by pumping the water to the tank's top? Give your answer to the nearest J.
A. 256,563 J B. 1,642,006 J C. 24,630,086 J D. 8,210,029 J
Find the length and direction (when defined) of u × v.u = 2i + 2j - k, v = -i + k
A. 3; 
i - 
j + 
k
B. 9; 
i + 
j - 
k
C. 3; 
i + 
j - 
k
D. 9; 
i - 
j + 
k
Solve the problem.The sum of the squares of the digits of a positive two-digit number is 61, and the tens digit is 1 more than the units digit. Find the number.
A. 65 B. 54 C. 45 D. 56
Provide an appropriate response.Simplify: 
A. 
B. 
C. 
D. 