Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the 10. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive. So you will not have a negative exponent, because the decimal is moved to the left not the right it will actually be a +6 exponent. Also you only get a negative exponent if it is a small number like .56789 then you'd have a negative exponent, but that is not the case for this problem.
If 100 students make up 40% of the 6th grade population, then 50 students make up 20% of the 6th grade population. 20% × 5 makes 100% so if your multiply 50 by 5 you'd get your population. 50 × 5 = 250 sixth-graders
The answers are <span>I. Two pairs of opposite angles congruent. II. A pair of adjacent angles are supplementary. </span> <span>VIII. The diagonals bisect each other. </span>
