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2 years ago

Please can someone give me a answer of number 1 and 2 and explain by showing how to do it. Thank you

Mathematics

1 answer:

Ganezh [65]2 years ago

3 0

<h3>Answer:</h3>

1 1/8 in
4 7/8 cm²

<h3>Step-by-step explanation:</h3>

In both cases, you make use of the relationship between the length and width of a rectangle and its area. We take for granted that you are comfortable with arithmetic using mixed numbers and/or fractions. The applicable formula for the area (A) of a rectangle in terms of its length (L) and width (W) is ...

A = L·W

Fill in the given values and solve for the remaining one.

3/4 in² = (2/3 in)·W . . . . . divide by the coefficient of W to find W.

(3/4 in²)/(2/3 in) = W = 9/8 in = 1 1/8 in

A = (1 1/2 cm)·(3 1/4 cm) = (3/2·13/4) cm² = 39/8 cm²

A = 4 7/8 cm²

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2 years ago

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2 years ago

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Serhud [2]

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Step-by-step explanation:

Given - The circumference of the ellipse approximated by $C = 2\pi \sqrt{\frac{a^{2} + b^{2} }{2} }$ where 2a and 2b are the lengths of 2 the axes of the ellipse.

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Squaring Both sides, we get

$[\frac{C}{2\pi }]^{2} = [\sqrt{\frac{a^{2} + b^{2} }{2} }]^{2} \\\frac{C^{2} }{(2\pi)^{2} } = {\frac{a^{2} + b^{2} }{2} }\\2\frac{C^{2} }{4(\pi)^{2} } = {{a^{2} + b^{2} }$

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