Calculate the arc length of the indicated portion of the curve r(t).r(t) = (1 + 2t2)i + (2t2 - 1)j + (6 - t2)k, 1 ? t ? 3
A. 90
B. 24
C. 30
D. 72
Answer: B
Mathematics
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Find the average value of the function 
over the plane region R.
?
and ?R is the triangle with vertices (0, 0), (0, 1) and (1, 1).
What will be an ideal response?
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State whether the equation is linear or quadratic.4x + 9 = -7
A. quadratic B. linear
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