3 years ago

The perimeter of any polygon is the?

Mathematics

1 answer:

Wittaler [7]3 years ago

7 0

Answer:

Step-by-step explanation:

perimeter is the sum of all sides. it's the distance around the figure.

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3 years ago

Evaluate the following double integral where a = 2y

Keith_Richards [23]

Change the order of integration.

$\displaystyle \int_0^1 \int_{2y}^2 \cos(x^2) \, dx \, dy = \int_0^2 \int_0^{x/2} \cos(x^2) \, dy \, dx \\\\ ~~~~~~~~ = \int_0^2 \cos(x^2) y \bigg|_{y=0}^{y=x/2} \, dx \\\\ ~~~~~~~~ = \frac12 \int_0^2 x \cos(x^2) \, dx$

Substitute $u=x^2$ and $du=2x\,dx$ .

$\displaystyle \frac12 \int_0^2 x \cos(x^2) \, dx = \frac14 \int_0^4 \cos(u) \, du = \frac14 \sin(u) \bigg|_{u=0}^{u=4} = \boxed{\frac{\sin(4)}4}$

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1 year ago

What is 40 to the second power

Katyanochek1 [597]

40 to the second power is 1600!

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Find the circumference and the area of a circle with diameter 2 cm . Use the value 3.14 for π , and do not round your answers. B

Fynjy0 [20]

Circumference= 2×pi×R
Area= pi× R^2
Since Diameter=2 cm ---> Radius is 2× diameter , so R=4 cm

Circumference=2×3.14×4= 25.12 cm
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