Algebra
posted by michelle .
Square lot. Sam has a lot that he thought was a square, 200 feet by 200 feet. When he had it surveyed, he discovered that one side was x feet longer than he thought and that the other side was x feet shorter than he thought.
a).
Find a polynomial A(x) that represents the new area.
b).
Find A(2)
c).
If x=2 feet then how much less area does he have than he thought he had?
Answer:
a).
A(x)=(200x)*(200+x)
A(x)=40,000x^2
b).
A(2)=40,000(2)^2
A(2)=40,0004
A(2)=39,996 feet^2
c).
Initial area= 200*200=40,000 feet^2
Present area A(2)=39,996 feet^2
40,000 – 39,996= 4 feet ^2
I need to know if i done this correctly.
Respond to this Question
Similar Questions

Math
Julie is digging a square area in her backyard for a vegetable garden. If the area is 52 square feet, what is the approximate length of one side of her garden? 
Algebra
Suppose a square garden has an area represented by 9x^2 square feet. If one side is made 7 feet longer and the other side is made 2 feet shorter, then the trinomial that models the area of the larger garden is 9x^2 + 15x  14 square … 
math algebra
a square parking lot has a surface area of (w^42w^2x+x^2) square feet. Factor this trinomial to find the length of one side in feet. 
prealgebra
Welmin makes a square quilt that has an area of 100 square feet.It has 25 square blocks, each the same size. What is the legth of each side of a block? 
math
Welmin makes a square quilt that has an area of 100 square feet.It has 25 square blocks, each the same size. What is the legth of each side of a block? 
math
A scale model of a rectangular building lot measures 7 feet by 5 feet. If the actual house will be built using a scale factor of 12, what is the area of the actual building lot? 
Math plz help someone.
Which of the following is a possible measure of the area of a square rug? 
Math
of the following is a possible measure of the area of a square rug? 
Math
1. Which of the following is a possible measure of the area of a square rug? 
CSC
A vacant city lot is being turned into a neighborhood garden. The neighbors want to fence in a triangular section of the lot and plant flowers there. The longest side of the triangular section is 44 feet shorter than twice the shortest …