Please help me! 15 pts! + Brainliest! The graph shows how the depth of a submarine increased as it dove beneath the surface. What can be concluded from the information on the graph? The graph is above, please answer correctly thanks :)

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

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.

Aculture started with 2,000 bacteria. after 8 hours, it grew to 2,400 bacteria. predict how many bacteria will be present after 19 hours . round your answer to the nearest whole number. p=ae^kt