B-4.2< -7.5
Explanation-
They say b minus 4.2 so we set it up like b-4.2 then it says less than so we use <
Dollar : Lawns
140 : 10
14 : 1
The ratio is 14:1
First find half of the perimeter of the triangle: s = (a + b + c) / 2 = 11.095
Then the area is:
A = Square Root [11.095 (11.095 - 7.7)(11.095 - 5.2)(11.095 - 9.29)] = 20.01999895 or 20.02 square feet rounded to 2 decimal places.
22/25 is the answer and also waffle waffle waffle waffle waffle