Calculate the circulation of the field F around the closed curve C.F = - 
x2yi - 
xy2j; curve C is r(t) = 5 cos ti + 5 sin tj, 0 ? t ? 2?
A. 0
B. - 
C. - 
D. - 
Answer: A
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Solve the problem.Suppose you would like to cross a 222-foot wide river in a boat. Assume that the boat can travel 33 mph relative to the water and that the current is flowing west at the rate of 7 mph. If the bearing is chosen so that the boat will land at a point exactly across from its starting point, how long will it take for the boat to make the crossing? Give your answer to the nearest second.
A. 2 sec B. 9 sec C. 19 sec D. 5 sec
Perform the indicated operation.Express 24 × 4 as a power of 2.
A. 28 B. 27 C. 26 D. 25
Find the volume of the solid. When appropriate, use ? ? 3.14 and round to the nearest hundredth.
A. 2099.52 yd3 B. 4199.04 yd3 C. 699.84 yd3 D. 1399.68 yd3
I4 = 60 mA, I3 = 30 mA, and I1 = 70 mA. What is the value of I2?
a. 60 mA
b. 90 mA
c. 30 mA
d. 150 mA
e. 120 mA