Find the volume of the solid of revolution formed by rotating about the x-axis the region bounded by the curves.y = 
, y = 0, x = 1, x = 6 Give your answer in exact form.
A. 
?
B. 
?
C. 
? ln 6
D. ? ln 6
Answer: D
Mathematics
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The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (10 sin 3t)i - (3 cos 3t)j + (10 csc 3t)k
A. a
= 90i + 90k
B. a
= -90i + 90k
C. a
= -90i - 90k
D. a
= 27j + 90k
Mathematics
Find the product.(-7)(-6)(-4)
A. -178 B. -168 C. -68 D. 168
Mathematics
Solve the problem.How long will it take for the population of a certain country to triple if its annual growth rate is 5.7%? (Round to the nearest year.)
A. 8 yr B. 1 yr C. 20 yr D. 53 yr
Mathematics
Evaluate.Find (f/g)(-5) given f(x) = 5x - 2 and g(x) = 4x2 + 14x + 2.
A. 
B. 
C. - 
D. 
Mathematics