Solve the initial value problem.
= - 
cos 
?, r(0) = -3
A. r = cos 
? - 4
B. r = -sin 
? - 3
C. r = - 
sin 
? - 3
D. r = sin 
? - 3
Answer: B
Mathematics
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Find the mass of the wire that lies along the curve r and has density ?.C1: r(t) = (4 cos t)i + (4 sin t)j, 0 ? t ? 
;C2: r(t) = 4j + tk, 0 ? t ? 1; ? = 3t3
A. 2?3 units
B. 
units
C. 
?3 units
D. 
units
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Find the domain of the given function. f(x) = 
A. (-?, -5] ? [11, ?) B. [-11, 5] C. (-?, -11] ? [5, ?) D. [-11, ?)
Mathematics
Identify the given number as "Rational", "Irrational", or "Not a real number". If the number is rational, give its exact value. If the number is irrational, give a decimal approximation to the nearest thousandth.
A. Irrational, 11.747 B. Irrational, -11.747 C. Rational, -11.747 D. Not a real number
Mathematics
Solve the equation.
= -x
A. 20 B. 4 C. -20 D. -4
Mathematics