Please help NO LINKS Use the theorem of Pappus to find the volume of a torus (pictured here). Assume that a disk of radius
a
=
3
a
=
3
is positioned with the left end of the circle at
x
=
b
=
4
x
=
b
=
4
, and is rotated around the
y
y
-axis.
tourus centered at origin major radius b, minor radius a
Volume =
Write as an exact expression. Use pi for
π
π
.

At which value in the domain does f(x) =0?

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a diamond or heart. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability of randomly selecting a diamond or heart or club. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability of randomly selecting queen or club. (type an integer or a decimal rounded to three decimal places as needed.)