Exam 18: Final Exam

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Find the area of the region that is bounded by the given curve and lies in the specified sector. r=9sin⁡2θ,0≤θ≤π/2r = 9 \sqrt { \sin 2 \theta } , 0 \leq \theta \leq \pi / 2

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Solve the initial-value problem. drdt+2tr−r=0,r(0)=3\frac { d r } { d t } + 2 t r - r = 0 , r ( 0 ) = 3

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Set up an integral that represents the length of the curve. Then use your calculator to find the length correct to four decimal places. x=t−2sin⁡t,y=t−2cos⁡t,0≤t≤4πx = t - 2 \sin t , \quad y = t - 2 \cos t , \quad 0 \leq t \leq 4 \pi

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Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=5(x2+4),y=5(12−x2); about y=−5y = 5 \left( x ^ { 2 } + 4 \right) , y = 5 \left( 12 - x ^ { 2 } \right) ; \text { about } y = - 5

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