Find the derivative of the function.
?
?
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find the mass of the wire that lies along the curve r and has density ?.r(t) = 
i + 3tj, 0 ? t ? 1; ? = 4t
A. 
units
B. 
units
C. 2 units
D. 
units
Mathematics
Solve and graph.6x - 4 < 2x or -2x ? -6
A. [1, 3]
B. ?
C. (1, 3)
D. (-?, 1) ? [3, ?)
Mathematics
A professional gambler reported that at the end of the first race at the track he had doubled his money. He bet $33 on the second race and tripled the money he came with. He bet $60 on the third race and quadrupled his original bankroll. He bet $68 on the fourth race and lost it, but still had $64 left. With how much money did he start? ?
A. $33 B. $66 C. $165 D. $132 E. $99
Mathematics
Solve the equation by completing the square.x2 + 8x - 3 = 0
A. {4 - 
, 4 + 
}
B. {-4 - 
, -4 + 
}
C. {-1 - 
, -1 + 
}
D. {4 + 
}
Mathematics