Find the mass of the wire that lies along the curve r and has density ?.r(t) = 
i + 5tj, 0 ? t ? 1; ? = 5t
A. 
units
B. 
units
C. 
units
D. 
units
Answer: D
Mathematics
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Graph the parametric equations.x = 4 cos t, y = 4 sin t ; 0 ? t ? 2?
A. 
B. 
C. 
D. 
Mathematics
Each matrix is nonsingular. Find the inverse of the matrix. Be sure to check your answer.
A. 
B. 
C. 
D. 
Mathematics
Multiply.(x2 - 0.7)(x2 + 0.7)
A. x2 - 0.49 B. x2 + 0.49 C. x4 + 0.49 D. x4 - 0.49
Mathematics
Evaluate the expression. Write your answer without exponents.
-3
A. 
B. 
C. 
D. 
Mathematics