How many different arrangements could be made using 4 characters if repetition is not allowed? assume your "alphabet" consists of the lower-case letters?

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

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

Which expression is modeled by this set of arrows on the number line?