Can you check my work @Shalante? A cheetah is known to be the fastest mammal on Earth, at least for short runs. Cheetahs have been observed running a distance at \(5.00\times10^2\)m with an average speed of \(1.00\times10^2\)km/hr. How long would it take the cheetah to cover this distance at this speed? I first converted to m/s and I got the time to be 19.8s, is that right?

- BloomLocke367

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- BloomLocke367

I used |dw:1441319140411:dw|

- anonymous

I got 18.0 sec

- BloomLocke367

how?

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## More answers

- BloomLocke367

I did 27.78m/s=550m/t. I then divided 550m by 27.78m/s and got 19.8s

- anonymous

\[\frac{ 100km }{ 1 hour }\times \frac{ 1000m }{ 1km }\times \frac{ 1hour }{ 60minutes }\times \frac{ 1minute }{ 60seconds }\]= 27.7m/s
Notices 100km/1hr is the same as 100km/hr.
27.7m/s is velocity
To get time=distance over velocity
t=500m/27.7m/s=18.0s

- anonymous

It is 500m not 550m
5.00 x10^2m is 500m.
Unless you posted the wrong number

- anonymous

Otherwise you did everything correct.

- BloomLocke367

Uh oh... I typed the problem wrong. it is 5.50*10^2, not 5.00

- BloomLocke367

thanks for pointing that out and making me double check xp

- BloomLocke367

so am I correct?

- anonymous

Ah, I see.
Yea you are correct then.

- anonymous

Nice job solving the problem.

- BloomLocke367

thanks :)

- anonymous

Got anymore? I have 25 minutes before I go.

- anonymous

any more*

- BloomLocke367

yes, there's a part b to that problem, I'm working it out right now

- anonymous

Feel free to post it, so I can solve it faster and also respond earlier.

- BloomLocke367

it is "suppose the average speed of the cheetah were just 85.0km/hr. What distance would the cheetah cover during the same time interval calculated in a?"

- BloomLocke367

I already converted it into m/s and got 23.61m/s

- BloomLocke367

I got 467.5m... is that correct?

- anonymous

23.61m/s*19.8s=476.5m
You are correct
4.74 x10^2m tho since we are multiplying and dividing and least sf in original value is 3.
Brb let me switch computers. (In school)

- BloomLocke367

oki c:

- BloomLocke367

woe... why 4.74?

- anonymous

Oops I mean 4.76

- anonymous

Actually, it is better to round it off 467.5m becomes 467m.
I was rushing when I shut down the computer lol.
2 mistakes already.

- anonymous

468m I mean.

- BloomLocke367

hahaha it's alright.

- anonymous

If answer is in 4 sf then shortest sf is 3 then you do scientific notation
Ex: 5067m is answer. Least sf is 3
5.07x10^3m

- BloomLocke367

okay thanks for the tip XD I'll be right back, I'll be afk.

- anonymous

and shortest sf is 3, then you
Typing so fast with this nice keyboard.
Making lots of typos and such.

- anonymous

I had to go right now. Remember?
Probably be back in like 90 minutes the least.
Feel free to tag me or pm me later.

- BloomLocke367

oki, I'm back now tho

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