What is the total area under the standard normal distribution curve 1,25, 100, .5

Write two subtraction equations that are equivalent to 5 + 12 = 17.

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

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.