Find the indicated limit if it exists.
A. 2
B. 0
C. 4
D. does not exist
Answer: C
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Identify the number represented on the abacus.
A. 939 B. 539 C. 5,309 D. 9,309
Solve the problem.The shape and density of a thin shell are indicated below. Find the coordinates of the center of mass.Shell: cylinder x2 + z2 = 81 bounded by y = 0 and y = 6Density: constant
A. 
B. 
C. 
D. 
Find the unit tangent vector T and the principal unit normal vector N. r(t) = (cosh t)i + (sinh t)j + tk
A. T = - 
(tanh t sech t)i + 
j + 
(sech t)k; N = (-sech t)i - (tanh t)k
B. T = - 
(tanh t)i + 
j + 
(sech t)k; N = (-sech t)i - (sinh t)k
C. T = 
(tanh t)i + 
j + 
(sech t)k; N = (sech t)i - (tanh t)k
D. T = 
(tanh t sech t)i + 
j + 
(sech t)k; N = (sech2 t)i - (sinh t)k
Use the rules for exponents to rewrite the expression and then evaluate the new expression. 3-2? 34
A. 
B. 6
C. -729
D. 9