The graph of a function f is given. Use the graph to answer the question.How often does the line y = 20 intersect the graph?
A. three times
B. once
C. does not intersect
D. twice
Answer: A
Mathematics
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Find the length of the curve.x = 3 sin t - 3t cos t, y = 3cos t + 3t sin t, 0 ? t ? 
A. 
?2
B. 
?
C. 
?2
D. 
?2
Mathematics
Use the graph of f to determine the intervals where f is increasing and where f is decreasing.
A. incr: x ? 0; decr: x ? 0 B. incr: all x C. decr: all x D. incr: x ? 0; decr: x ? 0
Mathematics
Let f be the function defined by 
.
?
Find the differential of f.
?
dy = __________
?
Find the approximate change in y if x changes from 3 to 3.01.
?
dy = __________
?
Find the actual change in y if x changes from 3 to 3.01.
?
__________
What will be an ideal response?
Mathematics
Solve the equation.log (4x) = log 5 + log (x - 1)
A. {- 5}
B. 
C. {5}
D. 
Mathematics