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4 years ago

Rewrite the formula for the circumference of a circle C=2xpix r in terms of its diameter d. Show your work.

2 answers:

ozzi4 years ago

7 0

Hi there!

The answer is
$circumference \: = d\pi$
In this formula d represents the diameter.

We know that 2 times the radius equals the diameter, hence
$2r = d$

Therefore we can replace the 2r in the original formula by d, and then we get the following:
$circumference = 2\pi \: r = 2r\pi = d\pi$

Keith_Richards [23]4 years ago

3 0

Diameter = 2·radius

С = 2·π·r ⇒ С = π·d

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We are given that as part of your retirement plan, you want to set up an annuity in which a regular payment of $35,000 is made at the end of each year at rate of 6% compounded annually for 20 years

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So plugging in all the values in the formula , we get

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Simplifying further , we get

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Hope it was helpful !:)

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