## BloomLocke367 one year ago 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?

1. BloomLocke367

I used |dw:1441319140411:dw|

2. anonymous

I got 18.0 sec

3. BloomLocke367

how?

4. BloomLocke367

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

5. 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

6. anonymous

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

7. anonymous

Otherwise you did everything correct.

8. BloomLocke367

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

9. BloomLocke367

thanks for pointing that out and making me double check xp

10. BloomLocke367

so am I correct?

11. anonymous

Ah, I see. Yea you are correct then.

12. anonymous

Nice job solving the problem.

13. BloomLocke367

thanks :)

14. anonymous

Got anymore? I have 25 minutes before I go.

15. anonymous

any more*

16. BloomLocke367

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

17. anonymous

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

18. 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?"

19. BloomLocke367

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

20. BloomLocke367

I got 467.5m... is that correct?

21. 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)

22. BloomLocke367

oki c:

23. BloomLocke367

woe... why 4.74?

24. anonymous

Oops I mean 4.76

25. 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.

26. anonymous

468m I mean.

27. BloomLocke367

hahaha it's alright.

28. 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

29. BloomLocke367

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

30. anonymous

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

31. 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.

32. BloomLocke367

oki, I'm back now tho