Mathematics, 13.08.2021 04:30 soccergirly7588

A presenter wants to see know if his presentation was effective. In order to do that he feels like he should interview a sample of the participants. When choosing his sample, he believes he should consult approximately 10% of the audience. He doesn't want to just gather the first ones out of the room or the last ones because he is afraid that the time that they leave could bias the results. For example, those in a hurry could have been bored and those that stayed could be more interested. Therefore, to get a more appropriate sample he should use which method

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Answer from: Quest

1st part is 64,000,000

2nd part 500,000

step-by-step explanation:

Answer from: Quest

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0

Answer from: Quest

Where are the options?

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