The tank is in the shape of a rectangular box. the length is 6 feet, the width is 3 feet, and the height is 2 feet. find the nth term that represents a full tank. explain.

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50