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3 years ago

What is the perimeter of the rectangle

Mathematics

1 answer:

timofeeve [1]3 years ago

7 0

Answer:

A = 22in

Step-by-step explanation:

P = 2L + 2W P = 2(6) + 2(5) A = 30

A = L * W P = 12 + 10 L = 6

30 = 6W P = 22 W = 5

W=5

A = Area of the rectangle is 30in

P = Perimeter of the rectangle is 22in

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so the sun is one of the foci, and we have an eccentricity of 0.97. So the ellipse will look more or less like the picture below.

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$\bf e=\cfrac{c}{a}\implies 0.97=\cfrac{c}{35.88}\implies \boxed{34.8036=c} \\\\\\ c=\sqrt{a^2-b^2}\implies b=\sqrt{a^2-c^2}\implies b=\sqrt{35.88^2-34.8036^2} \\\\\\ \boxed{b\approx 8.72}\\\\ -------------------------------\\\\ \cfrac{(x-0)^2}{35.88^2}+\cfrac{(y-0)^2}{8.72^2}=1\implies \cfrac{x^2}{1287.3744}+\cfrac{y^2}{76.0384}=1$

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4 years ago

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3 years ago

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Neko [114]

Answer:

Step-by-step explanation:

The way I figured this out is to just pick some starting values for the grams of this element and plug them into the formula using t = 1 day and seeing how much is left. I chose 2 different starting amounts and came up with the same percentage each time, so it must be correct! Here's what I did:

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x = 95% (that's the amount left as a percentage).

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x% * 20 = 19 and

x = 95%

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