To find the area of a rectangle apply the formula: 

$\displaystyle Area= Width\times Length$

This problem provides the measurements for both the width and length of the rectangle. However, to select the correct answer it's necessary to convert the width and length measurements from feet to inches. 

Since an inch is equal to $\displaystyle \frac{1}{12}$ of $\displaystyle 1$ foot, the width and length conversions are: 

$\displaystyle \frac{3}{4}=\frac{3}{4}\times \frac{3}{3}=\frac{9}{12}=9 in.$

$\displaystyle \frac{1}{2}=\frac{1}{2}\times \frac{6}{6}=\frac{6}{12}=6in.$ 

Thus, the solution is: 

$\displaystyle Area=9\times6=54in^2$

In this problem you are given the width and perimeter of the rectangle. However, to solve for the area of the rectangle you must first find the length of the rectangle. To do so, work backwards using the formula: 

$\displaystyle Perimeter=2(W+L)$

$\displaystyle 34=2(9+L)$

$\displaystyle 34=18+2L$

$\displaystyle 2L=34-18=16$

$\displaystyle L=\frac{16}{2}=8$

Now that you know the width and length of the rectangle, apply the area formula: 

$\displaystyle Area=Width\times Length$

$\displaystyle Area=9\times 8= 72$ 

To find the area of a rectangle apply the formula: 

$\displaystyle Area= Width\times Length$

This problem provides the measurements for both the width and length of the rectangle. 

Thus, the solution is: 

$\displaystyle Area=8\times25=200$

To solve, simply use the formula for the area of a rectangle. Thus,

$\displaystyle A=w*l=2*4=8$

To solve, simply use the formula for the area of a rectangle. Thus,

$\displaystyle A=l*w=5*8=40$

The perimeter is all four sides added together so you have two sides that are $\displaystyle 7$ and two that are $\displaystyle 5$.  So the answer would be $\displaystyle 7+7+5+5=24$.

A computer screen has a height of 9 inches and a width of 16 inches. Find its area.

Area can be found by multiplying the length by the width. 

$\displaystyle A=9*16=144$

So our answer is 144

To find the area of a rectangle, multiply the length of the long side by the length of the short side.  The best way to find the answer is:

$\displaystyle x * (y + 1) = xy + x$

To find the area of a rectangle, multiply the length of the long side by the length of the short side.  The best way to find the answer is:

$\displaystyle 7(u-1) = 7u - 7$

To find the area of a rectangle, we use the following formula:

$\displaystyle \text{area of rectangle} = l \cdot w$

where l is the length and w is the width of the rectangle.  

In this case, we know the length of the swimming pool is 30 feet.  We also know the width of the pool is 20 feet.  So, we can substitute into the formula.  We get

$\displaystyle \text{area of rectangle} = 30\text{ft} \cdot 20\text{ft}$

$\displaystyle \text{area of rectangle} = 600\text{ft}^2$