Find the indicated vector.Let u = 3i, v = i + j. Find 2u - v.
A. 5i - 2j
B. 5i - j
C. i - 5j
D. 11i + j
Answer: B
Mathematics
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Find the volume under the surface z = f(x,y) and above the rectangle with the given boundaries.z = 4x2 + 9y2; 0 ? x ? 1, 0 ? y ? 1
A. 
B. 
C. 
D. 
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Determine whether the improper integral converges or diverges. 
A. Converges B. Diverges
Mathematics
Find the unknown value.When money is invested at 2% simple interest for 4 years, the interest is $224. Find the principal.
A. $2800 B. $2900 C. $280 D. $2700
Mathematics
Solve the problem.Given f(x) = -5x2 + 6x + 5, find f(3).
A. 8 B. -34 C. -22 D. -27
Mathematics