Please hurry -2 1/2 divided by -8/21

On Monday, Alex ran 1 1/2 miles. On Tuesday she ran 2 1/4. How much further did she run on Tuesday?

A tank at the Atlanta Aquarium is 3/4 of the way full. If the tank holds 40
gallons of water, how much water would it take to fill the tank?

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap