Use calculus to find the largest possible area for a rectangular field that can be enclosed with a fence that is 400 meters long.

the largest rectangular area is actually a square.

 so the side would be 400/4 = 100 feet

 area of a square is S^2

100^2 = 10,000 square feet

on friday there were 15 birds

logv3(x+2)=1

rewrite in exponential form:

logb(x) = y is equal to b^y =x

b = 3, y = 1

now solve for x:

3^1 = x+2)

x = 3-2

x = 1

see the picture for the graph.