Find the value of the derivative (if it exists) at the indicated extremum. (If an answer does not exist, enter DNE.) f(x) = 4 − |x|

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 vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

Marina baked cookies. she gave 3/4 of the cookies to the scout bake sale. she shared the remaining 6 cookies with her friends. how many cookies did marina bake?