Basically, every zero a number has to the end, the higher the scientific notation will be. Because 1000 has three zeroes, 10^5 will go to 10^8. So, you will travel 7.5 x 10^8 miles.
I believe that 40 ounces of meat would be 2.5 pounds of meat.
So the recipe would call for 2.5 pounds of meat.
hope this helps!
