Decide whether the statement is true or false. If it is false, tell why.If k is a positive number, then the equation -x2 = -144k has no real solutions.
A. False; the equation is equivalent to x2 = 144k, where x2 and 144k are positive, so it will have two real solutions
B. False; the equation is equivalent to x2 = 144k, where x2 and 144k are positive, so the equation will have one real number solution
C. True
Answer: A
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Solve.Mike works on commission selling electronic equipment. The linear function 
describes his annual income I when his total sales for the year are s. At what level of sales will Mike's income be $58,500?
A. $590,000 B. $59,000 C. $571,000 D. $5,900,000
Simplify.
A. - 
B. 
C. 15
D. - 15
Solve the problem.A railroad tunnel is shaped like a semi-ellipse. The height of the tunnel at the center is 26 ft and the vertical clearance must be 10 ft at a point 12 ft from the center. Find an equation for the ellipse.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Solve the problem.Some desert areas get only 8-10 inches of rainfall per year (365 days). If in one year the rainfall was 9.47 inches, what was the average daily rainfall for that year? Round to the nearest thousandth.
A. 0.027 inch B. 0.259 inch C. 0.026 inch D. 0.260 inch