Question 1206407
<br>
x = increase in width and length<br>
(a) A(x) = (200+x)(120+x)<br>
(b) The new area is 1.5 times the old area:<br>
(200+x)(120+x)=1.5(200)(120)<br>
The answer is not a "nice" number; you won't find it by factoring; and the quadratic formula with these large numbers is cumbersome.  Use a graphing calculator or some other method to find x and then answer the question.<br>
(c) Here the increase in the length of the floor is twice the increase in the width, so the amounts of increase are 2x and x:<br>
A(x) = (200+2x)(120+x)<br>
(200+2x)(120+x)=1.5(200)(120)<br>
Use a similar method to finish.<br>