What is the area of this composite figure?

Mathematics

2 answers:

Darya [45]3 years ago

8 0

Answer:

C) 34 cm^2

Step-by-step explanation:

6x4 + 5x2 = 34

Leya [2.2K]3 years ago

7 0

C is the answer 34 cm 2 that should be the correct answer

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Find the area cut out of the cylinder x2 z2=9 by the cylinder x2 y2=9.

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The cylinder is symmetric across the plane $y=0$ , so we need only consider half of the cut-out region.

This region can be parameterized by

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with $0\le\theta\le2\pi$ and $0\le r\le3$ . Then the area of this half is given by the surface integral

$\displaystyle\int_{\theta=0}^{\theta=2\pi}\int_{r=0}^{r=3}\left\|\mathbf r_r\times\mathbf r_\theta\right\|\,\mathrm dr\,\mathrm d\theta$
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Doubling this gives a total area of 72.

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Ostrovityanka [42]

Answer:3 hours total

Step-by-step explanation:

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3 years ago

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The sum of the digits of a 2-digit number is 11. If the digits are reversed, the number formed is 45 more than the original numb

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