Define e_r(x, y, z) = where r = sqrt( x^2 + y^2 + z^2) and (x, y, z) 6= (0, 0, 0). the function er is often called the unit radial vector.

(a) show that the flux of f = e_r/r^2 through a sphere centered at the origin is independent of the radius of the sphere.
(b) calculate the flux of f through the disk d (oriented in the direction of the positive x-axis) of radius 3 parallel to the y − z plane and centered at (4, 0, 0).

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.

idk

step-by-step explanation: i just don't

55% are girls and 45% are boys : ) hope this

step-by-step explanation: