3. Let C be the arc of y=8-(x^2)/2 which lies above the x-axis. Find the longest line segment both of whose endpoints lie on C.

(A) 7.7

(B) 8

(C) 8.9

(D) 9.1

(E) 12.5

if you could answer this question, help me please

- Apr 28th 2011, 07:33 PMstrivingseveral calculus problems from homework assignment that i couldn't solve II
3. Let C be the arc of y=8-(x^2)/2 which lies above the x-axis. Find the longest line segment both of whose endpoints lie on C.

(A) 7.7

(B) 8

(C) 8.9

(D) 9.1

(E) 12.5

if you could answer this question, help me please - Apr 29th 2011, 03:35 AMFernandoRevilla
Compute

$\displaystyle L=\displaystyle\int_{-4}^{\;4}\sqrt {1+(y')^2}\;dx=2\displaystyle\int_{0}^4\sqrt {1+x^2}\;dx=\ldots$