Which equation shows the zero property of multiplication A. 4×0=0
B. 9+9+9=3×9
C. 3×6=6×3
D. 5×1=1

A. 4×0= 0

Step-by-step explanation:

since it shows that any number you multiply by 0 still gives you 0

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

answer by yourhope:

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