In order to determine the answer, we have to know about the scientific notation.
The scientific notation is a way of writing large numbers or small numbers. A number is written in scientific notation when a number is a digit in the interval of (1,10) and it is multiplied by a power of 10.
So we can change the number following the next two parts:
Just the digit (the decimal point placed after the first digit of the number)
followed by x 10 to a power that represents how many places we move the decimal point. If we move it to the right, the power is negative. If we move it to the left, the power is positive.
To find 10% divide by 10 so 1.07 or round to 1.08 if you like then double to get 20% so 2.14 or 2.16 so if the bill is 10.75 you would pay 12.89 with a 20% tip