4divided by 6 rounded to the nearest rate

What is the celsius temperature that is equal to 94 degrees fahrenheit using the formula f=9/5 c+32

How do you find the area of a triangle

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.