The cost, c c, of producing x x totally cool coolers is modeled by the equation c = 0.005 x 2 − 0.25 x + 12 c=0.005x2-0.25x+12 how many coolers need to be produced and sold in order to minimize the cost? (round to the nearest whole number.)

25 coolers are need to be produce and sell in order to minimize the cost.

Explanation:

..[1]

Differentiating the given expression with respect to dx.

Putting ,

x = 25

Taking second derivative of expression [1]

(minima)

25 coolers are need to be produce and sell in order to minimize the cost.

the answer is definitely c.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.