Trackers Inc. produces backpacks in two models, journey and trek. The journey model requires 4 hours of labor, and the company makes a profit of $40. The trek model requires 6 hours of labor, and the company
makes a profit of $80. The distributor will accept no more than 4 trek models and 15 journey models per week.
What is the minimum number of hours of labor that are required for the company to make a profit of at least
$400 per week?
a

a negative exponent is translated as follows:

so, we have

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

no because after the troops were pulled many blacks were killed by hangings lynchings and other cruel ways which in a way interrupted the reconstruction of the south and differed from the way abraham lincoln had an idea of reconstruction