Find the potential function f for the field F.F = (y - z)i + (x + 2y - z)j - (x + y)k
A. f(x, y, z) = xy + y2 - xz - yz + C
B. f(x, y, z) = xy + y2 - x - y + C
C. f(x, y, z) = x(y + y2) - xz - yz + C
D. f(x, y, z) = x + y2 - xz - yz + C
Answer: A
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r = 
t = 
If Jin drives 
in 6 hours, what is her average speed during the trip?
A. 240 mph B. 40 mph C. 36 mph D. 34 mph
Identify the place value of the digit 5 in the decimal number. 4.97507
A. thousands B. hundredths C. tenths D. thousandths
Perform the indicated operations. Write the answer using only positive exponents. Assume all variables represent positive real numbers.
1/2
A. xy2
B. xy1/2
C. xy
D. 
Solve the problem.A motorcycle and a car leave an intersection at the same time. The motorcycle heads north at an average speed of 20 miles per hour, while the car heads east at an average speed of 48 miles per hour. Find an expression for their distance apart in miles at the end of t hours.
A. 52t miles
B. 2t
miles
C. 52
miles
D. t
miles