2. (5 marks) use the laws of logical equivalence (theorem 2.1.1 on page 49 of epp 5th edition, theorem 2.1.1 on page 35 of epp 4th edition) to show that: p (qp)v (p q) where p and q are statements

squares, rhombus, rectangles

step-by-step explanation: 4 cause 2+2=4

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