2*10^6 + 6*10^5 + 3*10^3 +9*10^1 +4*10^0
see expanded form is adding the digits together. and it would be what ever one number is times 10 to the power of how many digits are after that number. you skip the 0's though. hope this helps
I am not sure but it is right if your question is right.
She can plant 34 plants in all. If you multiply 34 and 2 you will get 34 and I think that is the answer.