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Find the radius, height, and volume

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Please help with these problems, I am stuck so if you could please post your steps, id appreciate it.

1.Use Newton's method to estimate the one real solution of x(exponent 3)+5x+1=0. Start with x0=0

2. If sinh x= 16/63, find cosh x, tanh x, cothx, sech x and csch x.

3. A right triangle whose hypotenus is square root of 5, m long is revolved about one its legs to generate a right circular cone. Find the radius, height, and volume of the cone of greatest volume that can be made this way.

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The solution finds the radius, height, and volume in this case.

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