U mean y = 0.9^x ...?
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its exponential decay...
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because.. y = (1/e)^x is exponential decay...
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(1/e) < 1
Answer:

So then is required at least 210 ft in order to satisfy the conditions.
Step-by-step explanation:
For this case we can assume that the rectangular enclosure is on the figure attached.
The perimeter on this case is given by:

We know that the total area is
and the total area is given this formula:

Because we have two identical rectangular pieces.
And we can find the value for W like this:

And then we can find the perimeter like this:

So then is required at least 210 ft in order to satisfy the conditions.
Step-by-step explanation:
The sunset formula 2^n where n is the number of elements tells us that there are 8 subsets that is 2³=8 and they are:
{}
{F}
{g}
{h}
{F,g}
{F,h}
{g,h}
{F,g,h}
Work:
(s = 150ft
t = 1/4 square root of s)
Square Root (150) = 12.2474487139
12.2474487139 ÷ 4 = 3.0618621785 = ~3.062
Final Answer: About 3.062 seconds.
Answer:
5.25
Step-by-step explanation: