Calculus 1

Use the shell method to determine the volume of the solid formed by rotating the region about the y axis.

$y = x^2 + 2$

$y = 0$, $x = 0$, $x = 2$

Let R be the region enclosed by the graph of $f(x) = x^4 - 2.3x^3 + 4$ and the horizontal line y = 4, as shown in the figure above.

A. Find the volume of the solid generated when R is rotated about the horizontal line y = -2

B. Region R is the base of a solid. For this solid, each cross section perpendicular to the x-axis is an isosceles right triangle with a leg in R. Find the volume of the solid.

C. The vertical line x = k divides R into two regions with equal areas. Write, but do not solve, an equation involving integral expressions whose solution gives the value k.

Use the disk method to find the volume of the solid of rotation by rotating the bounded area around the y-axis

$y = 2x^2$, $y = 0$, $x = 2$

The water trough is 5 feet long and its ends are trapezoids as shown. If the water trough is full of water, find work done in pumping the water out over the top. Assume that water weighs 62.5 lbs/ft^3.