Find the rate of change: you burn 400 calories in one hour and you burn 1200 calories in 3 hours.
and !

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.

The function f(x)= -(x+5)(x+1) is down. what is the range of the function?