00:01
For this question, the revenue function, which is given as 80x minus 3x squared, and the cost function is given as 130 plus 15x.
00:11
So the profit function, we have to just construct the profit function, which is defined as p of x, that is equal to revenue minus the cost function.
00:22
So the revenue is 80x minus 3x squared minus the cost, 130 plus 15x.
00:29
So if i simplify this, the profit function, which is equal to, this is negative 3x squared and plus 65 x and minus 130.
00:43
So this is the profit function.
00:46
And what about the domain of this quadratic function? so the domain, so in the question, the x value is given as, which is 20 and 1, and the boundaries are included.
00:57
So since this is a quadratic function, if you draw the quantitative function, we have the shape of this one here, this one here.
01:07
So this is greater than 0 .7 something else...