Find the limit if it exists. 
What will be an ideal response?
?9
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Calculate the arc length of the indicated portion of the curve r(t).Following the curve r(t) = 5ti + (12 cos t)j + (12 sin t)k in the direction of increasing of arc length, find the point that lies 39? units away from the point where 
A. (15?, 0, 0) B. (15, -12, 0) C. (15?, -12, 0) D. (15?, 0, -12)
Find the selling price per item to the nearest cent.Total cost: $47Quantity: 55Unsaleable: 9% Markup on selling price: 30%
A. $0.79 B. $1.46 C. $0.66 D. $1.22
Solve the linear equation.8(y + 7) = 10y + 56
A. 0 B. 112 C. 56 D. -56
Solve.Carole's car averages 15.9 mi/gal in city driving and 24.8 mi/gal in highway driving. If she drove a total of 531.0 mi on 25 gal of gas, how many of the gallons were used for city driving?
A. 10 gal B. 20 gal C. 12 gal D. 15 gal