kaz...

which two early civilizations were located in present-day Mexico? A. Incas and Cuzo B. Mayans and Aztecs*** C. Aztecs and Incas D. Cuzo and Mayas my answer (***)

if an atomic nucleus were the size of a dime how far away might one of its electrons be? A. 1 foot B. 1 inch*** C. 1 yard D. 1 mile My answer (***)

Which number is in scientific notation A. 3.4 x 100^2 B. -5x10^-12*** C. 0.84x10^6 D. 7.8x10^5

ok thanks

Im not very good at science and i dont want to fail so i came here for help If you can help please do it would be greatly appreciated!

Is somthing wrong with my question Tell me what to swich or somthing because I usaly get a aswer realy quick here on jiskha but it has taken awhile im not tring to be rude but If Someone could check my answer that would help a lot.

Please just dont ignore this question if one of you cant answer it then please let me know so I can go try and get some help some where else.

oh ok thank you that realy help me understand

I think a. and c. are too small becuase you said "none of the answers is there But for a large atom" So I think the answer is D.

Bob I wanted to let you know that if it wasn't for you I would have probably just failed in science and I wanted to say thank you for your help. I was never very good at science.

Oh sorry typo the question is which number is Written in sceintific notation

I tried a and it was wrong