Solve the problem.The path between three landmarks in a national park form a right triangle. The oldest living evergreen tree is at point A, the ranger station is at point B, and the natural hotspring is at point C. The right angle is at point C, and there is a 60° angle at point B. If the distance between the hotspring and the evergreen tree is 683 yards, find the distance, x, from the hotspring to the ranger station. Round to two decimal places if needed. 
A. 394.33 yd
B. 965.91 yd
C. 1182.99 yd
D. 482.9539 yd
Answer: A
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A. 
?k
B. 
?k
C. 1250?k
D. 
?k
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A. 7.33% B. 6.11% C. 5.50% D. 4.89%
Find the total area of the region between the curve and the x-axis.y = -x2 + 9; 0 ? x ? 5
A. 
B. 
C. 
D. 
Find the curvature of the space curve.r(t) = -4i + (t + 10)j +(ln(cos t) + 1)k
A. ? = sin t B. ? = cos t C. ? = sec t D. ? = csc t