Use a calculator to find the acute angle ?, to the nearest degree, that satisfies the equation.cos ? = 0.63
A. 51°
B. 42°
C. 9°
D. 1°
Answer: A
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Find the gradient field F of the function f.f(x, y, z) = x6y7 + 
A. F = (6x5 + 5x4)i + 7y6j + 
k
B. F = 6x5y7i + 7x6y6j - 
k
C. F = (6x5 + 5x4)i + 7y6j - 
k
D. F = 
i + 7x6y6j - 
k
Match the vector equation with the correct graph.
r(t) = (3 - 2t)i + tj; 0 ? t ? 
A. Figure 8 B. Figure 5 C. Figure 3 D. Figure 1
Solve the problem. Round to the nearest cent.A camera costs $840. If the sales tax rate is 9%, how much tax is charged and what is the total price?
A. $756.00, $1596.00 B. $75.60, $915.60 C. $84.00, $924.00 D. $67.20, $907.20
Solve the problem.An experienced bank auditor can check a bank's deposits twice as fast as a new auditor. Working together it takes the auditors 4 hours to do the job. How long would it take the experienced auditor working alone?
A. 4 hr B. 8 hr C. 6 hr D. 12 hr