Answer:
the answer is 1.....................................…...……
Answer:

Step-by-step explanation:
If you have two numbers x and y, their geometric mean is defined as

Let that number be m, and let x be the smallest of the two numbers.
You know for sure that

Since

And

With equality holding if and only if x=y.
So, we can use the geometric mean to generate numbers which are for sure between two desired values. For example:

The middle term is of course irrational, since it's equal to

Now we can do the same thing with our newfound value which we know to be between 1/4 and 1/5:

And

Answer:
the markup percentage is 66.67%
Step-by-step explanation:
The computation of the percent of markup based on cost is shown below:
= (Selling price - paid price) ÷ (paid price)
= ($15 - $9) ÷ ($9)
= 66.67%
By taking the difference of the selling price & paid price and then divided it by paid price we can get the percentage of markup
Hence, the markup percentage is 66.67%