A plane loses altitude at the rate of 5 meters per second. It begins with an altitude of 8500 meters. Write an equation that represents this information.

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

Find the maximum value of p= 4x + 5y subject to the following constraints :

Consider the sequence below. 3 , 1 , 1/3 , 1/9 , select the explicit function which defines the sequence.