Is this correct? significant figures

Question

quickstudent · Answer

attachment

shadowlegendx · Answer

2 is correct

shadowlegendx · Answer

For 3, were you supposed to put all of them in scientific notation?

quickstudent · Answer

No, they just have to be correct significant figures.

shadowlegendx · Answer

So for C, why did you put it in scientific notation?

shadowlegendx · Answer

I gtg, they all look correct

shadowlegendx · Answer

Use this if you need to check your work http://www.sigfigscalculator.com/

jhonyy9 · Answer

@quickstudent so than i see your posted exercise and above ve wrote that 2.A and 2.B are correct - so than in case of the next exercise why not ve solved in same way ?

quickstudent · Answer

Because I have to use significant figures.

jhonyy9 · Answer

so than use the way of exercise 2 A and B so than for 3/A will get 12

jhonyy9 · Answer

ok. but exercise 2. not have same text like 3. ?

jhonyy9 · Answer

with significant figures

jhonyy9 · Answer

3/A 5+3+4=12 why not is right,correct 12 and how you ve got 6183 ?

jhonyy9 · Answer

http://www.sigfigscalculator.com/ used this site and i got this 12 like result

mathmate · Answer

#3C $has$ to be written in scientific notation because 350 is ambiguous as to the number of significant figures (2 or 3?).  However, $3.5\times~10^2$ makes it clear that there are two significant figures.
All questions are correct, well done!  :)

quickstudent · Answer

Thanks!

mathmate · Answer

you're welcome!  :)