<u>Answer:</u>
Multiplicative identity of 1
<u>Explanation:</u>
We have an expression . If this expression is
multiplied by 1, we get a result same as the given expression i.e.
.
It means that the number 1 multiplied with the expression had no effect on it as we got the same expression.
This is called the multiplicative identity of 1 according to which any time you multiply a number by 1, the result or the product is that original number.
Let be the most the manager can pay the suppliers.
Then, we know from the information given in the question that the manager needs a 30% markup based on cost.
Therefore, the guiding equation will be:
because $10 is the most people will pay for a neck warmer.
Thus, the above equation will become:
Thus, the most a manager can pay the suppliers for neck warmers and still keep the selling price at $10 is $7.69