During the annual black Friday sales

American consumers spent $9 billion online on Black Friday, up 21.6 percent year over year, according to data from Adobe Analytics, which had originally predicted sales of $10.3 billion. Salesforce estimated global sales of $62.2 billion, 30 percent more than last year.

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

a) 0

step-by-step explanation:

i^413 x i^0 = 0 as any number multiplied by a zero is

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