What is an interval In math

Average salary for a medical assistant is $31,220 which is a 20% income tax bracket how much money would they pay in income tax?

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?