Please help me find the circumference.

Mathematics

1 answer:

vampirchik [111]3 years ago

4 0

Answer:

15pi

Step-by-step explanation:

The equation for circumference is C=2πr

In the question you're given the diameter so we need to take 15 and divide by 2

giving us r=7.5

then 7.5*2=15

giving us 15pi

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MAY DAY MAY DAY, HELP

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Have you heard the expressions "shooting fish in a barrel" or
"taking candy from a baby" ?

I've decided to take your points and try not to feel guilty about it.

A). That's it ! That's the equation, for ANY basketball on Earth.
You wrote it right there in your question.

In that equation that you wrote, the ' r ' is the initial velocity.
You said that Adam tossed it straight up, and it was going 10 meters per second
 when it left his hand.
So ' r ' in the equation is +10.
The equation is:
 d = 10t - 5t²  .
It tells you how high the ball is above its tossing height after any number of seconds.
The ' t ' in the equation is the number of seconds. Any letter could have been used,
but ' t ' was cleverly selected because it stands for 'time'.

B). You want to know where it is after 0.5 second ? All you have to do is put '0.5'
into the equation wherever there's a ' t '. Do you really need somebody to do that
for you ?

Well, OK. You're being so overly generous with your points . . .

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 Distance = 10 (0.5) - 5 (0.5)²

 Distance = 5 - 5(0.25)

 Distance = 5 - 1.25

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positive 3.75 means above Adam's hand.

A thinking exercise:
-- He tossed the ball upwards at 10 meters per second.
-- Why is it not 5 meters above his hands after 0.5 second?

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