It takes 28 pounds of seed to completely plant a 4-acre field. How many acres can be planted per pound of seed? No links. Round to the nearest hundredth.

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

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.