Find the equation of the tangent line to the curve when x has the given value.f(x) = 
; x = 5
A. y = 13x - 16
B. y = - 
x + 
C. y = -39x - 80
D. y = 
x + 
Answer: B
Mathematics
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Find the limit if it exists.
A. -57
B. 57
C. -
D. 
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Convert the rectangular equation to polar form.y = 6
A. r = 6
B. r = 
C. sin ? = 6
D. r = 
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Solve.The cost in tens of thousands of dollars of removing x percent of a contaminant from a lake after an accidental chemical spill is given by the algebraic expression 
. Find the cost of removing 85 percent of the chemical from the lake.
A. $1,020,000 B. $6,800,000 C. $12,000 D. $680
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Solve the quadratic equation.12y2 + 31y + 20 = 0
A. - 
, - 
B. 
, 
C. - 
, - 
D. 
, - 
Mathematics