The husband and wife toy makers named their son Ken and their daughter Barbie.
If 19,125 people in the couple's hometown
-exactly 75% of the population—think
the couple is crazy, what is the total
population of the town?

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?

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.