Problem 1 - Section 5.4 The growth of algae increases when certain waste products containing phosphates are dumped in lakes. Such extra growth may adversely affect the ecosystem of the area. Scientists have measured the amount of algae growth in a particular lake. Below, :1: is the distance from the west shore and y is the length across the algae growth. .1 O E!- II Using left and right sums, estimate the amount of algae growth in the lake by using 8 subinter- vals. Problem 2 - Section 5.5 Evaluate each definite integral. You may need to use substitution. Show all work. 32 a) 5/72 dx re6 b) 5t dt e2 c ) (x - 2 )e 302 - 120 da