3 years ago

The radius of a circle is 9 yards. What is the circle's circumference?

Advanced Placement (AP)

1 answer:

solong [7]3 years ago

6 0

56.549 yards is the circumference.

Formula for circumference of a circle: 2(pi)r

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3 years ago

A DVD costs twice as much as a music CD. Jack buys 2 DVDs and 2 CDs and spends $45. Determine how much one CD costs, in dollars.

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Let $d=$ the cost of a DVD
Let $c=$ the cost of a CD

We have
$d=2c$
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We can replace $d$ with $2c$ in the second equation and get
$2(2c)+2c=45$
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$\rightarrow 6c=45$
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meriva

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