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3 years ago

5

Is 2.78778777... a irational number

2 answers:

Cerrena [4.2K]3 years ago

7 0

If by the ellipses you mean to say that the number 7 repeats forever after that point, then it is not irrational. Any number which can be expressed with repeating decimals is not irrational. For example, pi is an irrational number because it has no repeating decimals, but 0.33333333... is not irrational because it can be expressed by simply saying 0.3 repeated.

adell [148]3 years ago

4 0

YES!!! 2.78778777 is an irrational number because it has endless numbers, and a irrational number cant be put as a fraction but rational numbers can be put as a fractio!!

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Answer:

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Step-by-step explanation:

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$A = (\pi/8-2 - \pi/2)*w^2 + 41w = -3.1781w^2 + 41w$

To find the maximum area, we can find the x-coordinate of the vertex of the quadratic equation:

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So the width that gives us the maximum area of the window is 6.45 feet, and the area will be:

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