The diameter of a new piston is 4.644 in. The average wear per 10,000 mi is 0.009 in. uniformly over the piston. Find the average diameter of the piston after 100,000 mi.
A. 6.209 in.
B. 4.59 in.
C. 4.554 in.
D. 4.464 in.
E. 2.097 in.
Answer: D
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The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (2 sin 5t)i - (10 cos 5t)j + (9 csc 5t)k
A. a
= -50i - 225k
B. a
= 50i + 225k
C. a
= 250j + 225k
D. a
= -50i + 225k
Solve the system by graphing on a calculator. Round to the nearest hundredth if necessary.y = ln(3x - 2)x2 + 3y2 = 7
A. {(1.73, -1.16), (0.74, 1.47)} B. {(0.74, -1.47), (1.73, 1.16)} C. {(5.25, 2.62)} D. {(0.77, 1.46), (-0.59, -1.49)}
Simplify the given expression. Write the answer with variables in alphabetical order and any constant term last.-6b + 4a - 5c - 2b + 2a
A. 2a - 8b - 5c B. cannot be simplified C. 6a - 8b D. 6a - 8b - 5c
Graph on a number line.0.9
A. 
B. 
C. 
D. 