Find the volume of the described solid.The base of a solid is the region between the curve y = 5cos x and the x-axis from x = 0 to x = ?/2. The cross sections perpendicular to the x-axis are squares with diagonals running from the x-axis to the curve.
A. 
?
B. 6?
C. 
?
D. 
?
Answer: D
Mathematics
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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) = (3 ln(8t))i + (2t3)j
A. a = - 
i + 12tj
B. a = 
t-2i + 12tj
C. a = 
i + 6tj
D. a = - 
t-2i + 12tj
Mathematics
Provide an appropriate response.Graph y = - tan x and its derivative together on 
. Does the graph of 
appear to have a largest slope? If so, what is it? If not, explain.
What will be an ideal response?
Mathematics
Evaluate the limit if one exists.
A. 0
B. 
C. 
D. 
Mathematics
Multiply.9041 ? 10
A. 904,100 B. 90,410 C. 94,100 D. 94,010
Mathematics