If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.Find the acceleration vector.r(t) = (cos 2t)i + (5 sin t)j
A. a = (-4 cos 2t)i + (-5 sin t)j
B. a = (-2 cos 2t)i + (5 sin t)j
C. a = (-4 cos 2t)i + (-25 sin t)j
D. a = (4 cos 2t)i + (-5 sin t)j
Answer: A
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Solve the problem.David's company has to ship 4950 boxes of sprinklers. If a truck can hold 550 boxes, how many truckloads does he need to ship all the boxes?
A. 7 truckloads B. 9 truckloads C. 8 truckloads D. 10 truckloads
Find the area enclosed by the given curves.y = 2x - x2, y = 2x - 4
A. 
B. 
C. 
D. 
Find the differential of the function.y = 
A. 
dx
B. 
dx
C. 
dx
D. 
dx
The table shows the fraction of the world's surface land area taken up by each continent. Use the table to answer the question. Write your answer in simplest form. Continent Fraction of World's Surface Land Area North America 
South America 
Europe 
Africa 
Asia 
style="vertical-align: -17.0px;" /> Australia 
Antarctica 
Find the fractional part of the world's land area within the continents of North America and Europe.
A. 
B. 
C. 
D. 