Question

Which of the answers shows 12,300,000 in scientific notation *
12.3 X 10^6
1.23 X 10^7
1.23 X 10^ -7
123 X 10^5

Answer 1

hint: move the decimal place over to get 1.23. how many times did you need to move the decimal place?

Answer 2

put you decimal after the first number....1.2300000
now, counting from the decimal and going right, how many spaces are there till the end of the number ?

Answer 3

idk

Answer 4

5?

Answer 5

ok..
1.2300000......starting at the decimal, there are 7 spaces till you get to the end of the number....can you see that ?

Answer 6

i counted wrong

Answer 7

so is it b?

Answer 8

now....it just becomes 1.23 x 10^7

Answer 9

Thank You

Answer 10

no problem :)