A fence must be built to enclose a rectangular area of 5000 ft^2. Fencing material costs $2 per foot for the two sides facing north and south and $4 per foot for the other two sides. Find the cost of the least expensive fence.

answer: solve 5\cdot 2^x=2405⋅2  

x

=2405, dot, 2, start superscript, x, end superscript, equals, 240.

solution

to solve for xxx, we must first isolate the exponential part. to do this, divide both sides by 555 as shown below. we do not multiply the 555 and the 222 as this goes against the order of operations!

\begin{aligned} 5\cdot 2^x& =240 2^x& =48 \\ \end{aligned}  

5⋅2  

x

2  

x

​    

=240

=48

​

step-by-step explanation:

i believe it's a.

i'm not sure on this one, most likely correct.