Question

When writing a number in scientific notation, how many digits should be to the left of the decimal point?

A. None
B. One
C. Two
D. It depends on how precise you want your answer to be.

Answer 1

www.purplemath.com/modules/exponent3.htm
This should be of help! :)

Answer 2

It all depends on the intended significant digits, or how exact you'd like your data to get.

Answer 3

But usually as a rule of thumb we only have one digit to the left of the decimal point.