since the area formula is length times width,72 times 36 = 2592 then that times 6 = 15552.That is the area of the lot that has trees.
All you have to do is use a caculater
The first one is b the second one is b too
First we need to change a decline of 8.6% to a decimal, which is 0.914 (100% - 8.6%). With an initial value of 1500 we get: