Joe and Sally have $89.74 combined. They each had the same amount. What was that amount?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

If a || b and e || f , what if the value of y ?

Abag contains 5 red marbles , 6 blue marbles and 4 green marbles. susie selects a marble and returns it to the bag before selecting another marble. if susie selects a red marble 6 out of 20 times, what is the experimental probability that the next marble she selects will be a red marble ?