How do you write #20,000,000# in scientific notation?
Except for the value
scientific notation is always written in the form of
#color(red)("matissa")#is written as a single non-zero digit followed by a decimal point and an extended decimal fraction (by tradition at least one digit in the "extended decimal fraction").
#color(blue)("exponent")#is the power of #10#needed to raise the mantissa to the original value.