Find the center of mass of the wire that lies along the curve r and has density ?.r(t) = (6t2 - 2)i + 3tk, -1 ? t ? 1; 
A. 
B. 
C. 
D. 
Answer: B
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Find the intervals on which the function is continuous.y = 
A. discontinuous only when ? = -2
B. discontinuous only when ? = 
C. continuous everywhere
D. discontinuous only when ? = 2
Solve the problem.There were 630 people at a play. The admission price was $2.00 for adults and $1.00 for children. The admission receipts were $940. How many adults and children attended?
A. 235 adults and 395 children B. 160 adults and 470 children C. 320 adults and 310 children D. 310 adults and 320 children
The graph of a function f is provided. Determine the requested function value.f(-1)
A. -2 B. -28 C. -4 D. 2
Identify the degree and leading coefficient of the polynomial.f(x) = -2 + 6x4 - 18x + 2x3 + 15x2
A. Degree: 3; leading coefficient: 2 B. Degree: 4; leading coefficient: -2 C. Degree: 4; leading coefficient: 6 D. Degree: -2; leading coefficient: 6