Compute these weather readings: (a) temperature -20, wind MPH 35 = wind chill factor (b) MPH 5, wind chill factor 27 = actual temperature (c) actual temperature -10, wind MPH -15 wind chill factor (d) the lowest wind chill factor temperature

What is the base of 1/9 to the power of 2

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

Rob filled 5 fewer plastic boxes with football cards than basketball cards. he filled 11 boxes with basketball cards.