Question

Write 0.0002507 in scientific notation.
a.2,507 x 10`-7
b.2.507 x 10`-4
c.2.507 x 10`4
d.2,507 x 10`7
(Hint: ` means exponent)

Answer 1

just count how many spots the decimal moves until it is next to the 2. So in this case it moves to the left 4 spaces so it would be 2.507 x 10^4.

Answer 2

but what about d

Answer 3

what about d?

Answer 4

it also moves to the left 7 spaces too doesn't it?

Answer 5

That's true, but usually when you're doing scientific notation, you want to get the decimal behind the first digit that isn't 0 (in this case that number is 2). So technically both are correct, BUT c is more correct. If that makes any sense...?

Answer 6

ohhh uhmm ok