12. American Airlines reported at 90% of its flights into Los Angeles were on time. If you randomly select 20 American Airlines flights into Los Angeles what is the probability no more than 2 are late. Show the set up and work as well as the answer. Note: You want the probability of late planes.

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step-by-step explanation:

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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

i need a picture

step-by-step explanation: