how do I get every number from 1-20 using only four four's. Please this is due Monday. I'll make it worth more points too just... help

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

The variable in a relation who’s value depends on the value of the independent variable is called what?