Lauren knits scarves. Around Valentine's Day, she sold 39 red-and-white scarves for $12 each. She spent $45.60 on red yarn and $45.60 on white yarn. How much profit did Lauren make?

It's 376.8

Step-by-step explanation:

If you multiply 12 and 39 then the amount she earned comes. Then add 45.60+45.60 then it comes 91.2

Then subtract it withe the amount of money she earned and after the subtraction the answer will come $376.8

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

the answer is d

hope this