G (1) = 2.2 g(n) = g(n-1) * (-5)
Find an explicit formula for g(n)?

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