Simplify the expression. Assume all variables represent nonzero real numbers.65 ? 68
A. 613
B. 640
C. 1213
D. 3640
Answer: A
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Find the Jacobian for the given transformation.
A. - 
B. 20
C. -20
D. 
Solve the problem.At a store, Sam bought 4 batteries, 10 60-watt light bulbs, 44 100-watt light bulbs, 11 picture-hanging kits, and a hammer. Jennifer bought 10 batteries, 5 100-watt light bulbs, and a package of tacks. Write the information as a 2 x 6 matrix.
A. 
B. 
C. 
D. 
Use the discriminant to determine the number and nature of the solutions to the quadratic equation. Do not solve the equation.x2 + 10x + 25 = 0
A. two nonreal solutions B. exactly one real solution C. two real solutions
Solve the problem.100 employees of a company are asked how they get to work and whether they work full time or part time. The figure below shows the results. If one of the 100 employees is randomly selected, find the probability of getting someone who carpools or someone who works full time.
1. Public transportation: 8 full time, 6 part time2. Bicycle: 4 full time, 3 part time3. Drive alone: 30 full time, 29 part time4. Carpool: 10 full time, 10 part time
A. 0.72 B. 0.54 C. 0.3 D. 0.62