Find the mass of the wire that lies along the curve r and has density ?.r(t) = 10i + (7 - 4t)j + 3tk, 0 ? t ? 2? ; ? = 8(1 + sin 4t)
A. 16? units
B. 80? units
C. 20 + 80? units
D. 40 + 80? units
Answer: B
Mathematics
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Use a truth table to determine whether the symbolic form of the argument is valid or invalid.p ? qp ? r----? ~ r ? q
A. 
Symbolic argument is invalid.
B. 
Symbolic argument is invalid.
C. 
Symbolic argument is valid.
D. 
Symbolic argument is invalid.
Mathematics
Use the vertex and intercepts to sketch the graph of the quadratic function.f(x) = - 6x + 5 + x2
A. 
B. 
C. 
D. 
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.
A. -5x9 B. -5x12 C. -5x4 D. 5x4
Mathematics
Write < or > between the pair of numbers to make the statement true.
___ 0
A. < B. >
Mathematics