Find the mass of the wire that lies along the curve r and has density ?.C1: r(t) = (3 cos t)i + (3 sin t)j, 0 ? t ? 
;C2: r(t) = 3j + tk, 0 ? t ? 1; ? = 3t3
A. 
units
B. 
units
C. 
?3 units
D. 
?3 units
Answer: B
Mathematics
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Solve the equation by the method of your choice. Simplify irrational solutions, if possible.x2 - 5x = 0
A. {5, 0}
B. {0, -5}
C. {±
}
D. 
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Evaluate the determinant.
A. -3 B. -8 C. 3 D. 27
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Find the range of the quadratic function in interval notation.f(x) = -4x2 + 4x
A. (-?, 
B. (-?, 
C. (-?, 
D. (-?, 
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Find the exact answer.At SuperStop, gasoline costs 
per gallon when you pay with a credit card and 
gallon less when you pay with cash. How much do you save by filling up a 
tank if you are paying cash?
A. $54.30 B. $1.20 C. $12.00 D. $53.10
Mathematics