La temperatura a una distancia r del centro de una lámina está dada por t=40 (r2? 2r) . la variación instantánea de la temperatura respecto a r está dada por:

For this, the first thing to do is to assume that the function of temperature with respect to r is written in one of the following ways:

Way 1:

Way 2:

To find the instant variation we must find the derivative of the temperature with respect to the distance r.

We have then:

For function 1:

Rewriting

For function 2:

Rewriting

The instantaneous variation of the temperature with respect to r is given by:

Assuming function 1:

Assuming Function 2:

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.