Question

How to write these numbers in scientific notation?
1. 334,000,000



2. 0.00042



3. 15,630,000,000,000

Answer 1

move the decimal point, however many times you move it is the exponent of ten. if you move it to the right, count the numbers to one decimal spot i.e; .0002 would be 2x1010^3

Answer 2

just one 10

Answer 3

How do you know how many times to move the decimal point?

Answer 4

and if its big i.e; 90000.0 it would be \[9.0x10^{-4} somone check my numbers, my eyes are old

Answer 5

andi think i said it backwards

Answer 6

I thought the decimal would go behind the number for whole number like 7 or 3 etc

Answer 7

Well
your decimal point determines this

So it starts at the end for #1
The first number has to be a number 1 through 9
so our first number 3.34
x10
it will always be x10
The number of spaces over determines how many to the powers of 10 there are
So for the first one. We moved the decimal point 8 times so the first one is 3.34x10^8
If your answer is already in decimal form it will be 10^ a negative number
Here is a good example.
http://astro.unl.edu/classaction/outlines/intro/math_in_sci_not.jpg