## itsmichelle29 one year ago A

1. anonymous

$30 people \times \frac{ 6 pens }{ 1 people } \times \frac{ 1package }{ 5 pens } \times \frac{ 1.88 }{ 1 package }$ 6 pens=1 people or 6 pens per person 1 package=5 pens or 1 package per person $1.88=1 package or$1.88 per package per=divide.

2. anonymous

All units cancels out except the \$ sign.

3. anonymous

Yes.

4. anonymous

I was helping someone sorry.

5. anonymous

Post it.

6. anonymous

$\frac{ 3.255g }{ mL }=\frac{ 3.255kg }{ L }$ 1000 milligrams=1 grams 1000 grams= 1 kilograms.

7. anonymous

Can you solve it now?

8. anonymous

What is the formula for density?

9. anonymous

The whole process would have to be in conversion?

10. anonymous

So what is the unit for density?

11. anonymous

d=m/v so the unit of density is the (unit of m)/(unit of v) M is mass V is volume What are the units for mass and volume?

12. anonymous

Yes that works. So density is g/mL or kg/L

13. anonymous

Can you answer this? The whole process would have to be in conversion (dimensional analysis) ?

14. anonymous

Does the whole process need to be like this? $\frac{ ? }{ ? } \times \frac{ ? }{ ? } \times \frac{ ? }{ ? }$ Its a just a yes or no.

15. anonymous

Ok, you start with given and make the units cancel until you get Liters by itself. Similar to what I did earlier. Since you wouldnt mind trying, show me your dimensional analysis, then I can show you mines.

16. anonymous

If you are given unit1 and want to find unit 3 use this $\frac{ Unit1 }{ 1} \times \frac{ Unit 2 }{ Unit1 } \times \frac{ Unit 3}{ Unit2 }$

17. anonymous

Notice how unit 1 and unit cancels out?

18. anonymous

and unit 2*?

19. anonymous

It is supposed to be 123000 mg /1 at the beginning. That is the given unit.

20. anonymous

|dw:1442626458859:dw|

21. anonymous

Oh ok. I knew that but just didnt write it correctly because I am not actually doing it yet. But my bad.

22. anonymous

Give it one more go and I will post the steps.

23. anonymous

100kg is not 1g

24. anonymous

$\frac{ 1236000mg }{ 1 } \times \frac{ 0.000001kg }{ 1mg } \times \frac{ 1000g }{ 1kg }\times \frac{ 1mL }{ 3.255 g } \times \frac{ 0.001L }{ 1mL }$

25. anonymous

3.255 g/mL can be switched as mL/3.255g

26. anonymous

Its supposed to be 1230000 mg not 1236000 my bad

27. anonymous

In my opinion without using the dimensional analysis (factor), it is shorter.

28. anonymous

Glad to help! I have to go out for dinner now. If you still need help, PM me like 2-3 hours. Good luck on the rest!