Question 981036

First,  you should know that one yard is 3 feet  (1 yard = 3 ft).


Second, calculate the area of the Mcbeth's front yard in square feet.  It is


A = (16*3)*(12*3) = 1728 {{{ft^2}}}. 


Third,  calculate how much of weed killer sells do you need to cover this area.   To find this amount,  use the proportion 


{{{1728/1000}}} = {{{x/1}}},


where &nbsp;<B>x</B>&nbsp; is the unknown amount of weed killer sells in pounds.


It gives 


{{{x}}} = {{{1728/1000}}} = {{{1.728}}} pounds of weed killer sells.


The cost for this amount is &nbsp;&nbsp;$4.00 x 1.728 = $6.91.


It is the answer to your question.