i make 1.5 million dollars per day, plus an extra 250k interest every 31 hours, how much money do i make per day?

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your