Answer: [tex]61,560\ ft^2[/tex]
Step-by-step explanation:
Let be "x" the area of the actual shopping mall in square feet.
According to the information given in the exercise, the scale factor used is:
[tex]\frac{1\ in}{18\ ft}[/tex]
Then, the scale factor for the area is:
[tex](\frac{1\ in}{18\ ft})^2=\frac{1\ in^2}{324\ ft^2}[/tex]
The exercise provides you the area of the mall on the blue print (which is [tex]190\ in^2[/tex]). Then, knowing this, you can set up the following proportion:
[tex]\frac{1}{324}=\frac{190}{x}[/tex]
Finally, you must solve for "x" in order to find its value. This is:
[tex]\frac{1}{324}=\frac{190}{x}\\\\(x)(\frac{1}{324})=190\\\\x=190*324\\\\x=61,560[/tex]
Therefore, the area of the actual shopping mall is [tex]61,560\ ft^2[/tex]