which is a correct statement about the description to less than the quotient of a number cubed and 16 increased by 8 when n equals 4

Awall map has a scale of 128 miles = 6 inches. the distance between springfield and lakeview is 2 feet on the map. what is the actual distance between springfield and lakeview? 384 miles 512 miles 1.13 miles 42.7 miles

Pls! does anybody know a shortcut for answering these types of questions in the future?

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1