Find the derivative of the function.r = 
A. r ' = - 
B. r ' = 
C. r ' = 
D. r ' = 
Answer: B
Mathematics
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Find the center of mass of the wire that lies along the curve r and has density ?.r(t) = (2 cos 3t)i +(2 sin 3t) j + 6tk, 0 ? t ? 2?; ?(x, y, z) = 3(1 + sin 3t cos 3t)
A. 
B. 
C. 
D. 
Mathematics
Solve.The volume of a cube is given by 125 cm3. What is the area of each side of the cube?
A. 5 cm2 B. 21 cm2 C. 10 cm2 D. 25 cm2
Mathematics
Approximate to three decimal places.
A. 14.423 B. 14.421 C. 14.422 D. 14.412
Mathematics
Write the ratio in fraction notation.7 to 5
A. 
B. 
C. 
D. 
Mathematics