Help me please, I have multiple questions

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Two positive integers are 3 units apart on a number line. their product is 108. which equation can be used to solve for m, the greater integer? m(m – 3) = 108 m(m + 3) = 108 (m + 3)(m – 3) = 108 (m – 12)(m – 9) = 108

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?