COMMUNICATION In 1996, there were 171 area codes in the United States. In 2007, there were 215. Find the rate of change from 199
2 answers:
Answer:
4 area codes per year.
Step-by-step explanation:
There were 171 area cods in the United states in year 1996.
In 2007 there were 215 area codes. We have to find the rate of change from 1996 to 2007.
Since rate of change is defined by R =
=
=
= 4 area codes per year
Therefore, rate of change is 4 area codes per year.
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Answer:
15
Step-by-step explanation:
To find the minimum amount of items, x, that need to be sold for the manufacturer to make a profit, we can use the quadratic formula
In context of the problem, we can only rely on the positive value, as the negative value would lead to a loss of profit.
Furthermore, we must round to the nearest whole number, as you cannot make part of an item.
Lastly, if you were to plug in 14 into the equation for Profit, you would still have a negative number (i.e. a negative profit), thus requiring the manufacturer to make no less than 15 items to make a profit: