3 years ago

What is the role of PI in finding the circumference of a circle

Mathematics

1 answer:

Katarina [22]3 years ago

5 0

Answer:

PI is part of the formula for the circumference.

Step-by-step explanation:

The formula is c=2π r.

Hope it helps!

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An $80.00 coat is marked down 20%. It does not sell, so the shop owner marks it down an additional 15%. What is the new price of

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Answer:

$54.40

Step-by-step explanation:

First, find the new price after the 20% markdown:

80(0.8)

= 64

Then, find the price with the 15% markdown:

64(0.85)

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So, the new price of the coat is $54.40

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3 years ago

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The surface area of a cone is 54 square inches. What is the surface area of a similar cone that is three times as large?

12345 [234]

<u>Given</u>:

Given that the surface area of the cone is 54 square inches.

We need to determine the surface area of the cone that is similar to the cone three times large.

<u>Surface area of the similar cone:</u>

Let us determine the surface area of the similar cone.

The surface area of the similar cone can be determined by multiplying the surface area of the cone by 3. Because it is given that the similar cone is three times large.

Thus, we have;

$SA = 3 \times 54$

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Thus, the surface area of the similar cone is 162 square inches.

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3 years ago