Scientific notation of 93 million miles

Using an example such as the distance from the sun to the earth (93 million miles) serves as a good example of scientific notation (9.3 x 10^7 -- the first number must be between 1.0 and 9.9) and how it differs from engineering notation (93 x 10^6 -- engineers group in thousands, millions and billions).

17 or maybe it’s about 2