The number is a whole number because the exponent is positive. It means that the decimal point is located to the right of the number and moved to the left when it was converted to scientific notation. The number in the exponents represents the number of places the decimal point is moved. In this case, it was moved 5 times.
Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?