Simplify the expression, and combine like terms.7(10a2 + 3ab) - a(3a - 2b)
A. 73a2 + 23ab
B. 67a2 + 19ab
C. 73a2 + 3ab - 2b
D. 67a2 + 23ab
Answer: D
Mathematics
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Plot the parametric surface over the indicated domain.r(u, v) = u2sin vi + ucos vj + 4uk; 0 ? u ? 2?, 0 ? v ? 2?
A. 
B. 
C. 
D. 
Mathematics
Write the number in scientific notation. One milligram is about 0.015430 grain.
A. 0.1543 × 10-1 B. 15.43 × 10-3 C. 1.543 × 10-2 D. 1.543 × 10-3 E. 0.015430 × 10-2
Mathematics
Find the series' radius of convergence.
A. 2 B. 0 C. ?, for all x D. 1
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Solve the problem.Write an equation for the tangent line to the curve 
at the point 
A. x - y + 2 = 0 B. y = x - 2 C. x + y = 1 D. y = x + 1
Mathematics