"twelve diminished by six times a number
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So, here we have an exponential function.
Remember that an exponential function has the form:
Where a represents an initial amount, and r is the rate of this amount to change. (Increase, or decrease).
So, given that the population of City A in 2000 was 40 thousand people and the population increased by 13% each year, we can say that
So,
For city B:
But something different happens with city C. This is not an exponential function, this is a linear function.
So,
Given:
The scale of a map is .
The distance between two buildings is 60 miles.
To find:
The distance between the given building on the map.
Solution:
We have,
It means, 80 miles in real life = on the map.
1 mile in real life = on the map.
60 mile in real life = on the map.
= on the map.
= on the map.
Therefore, the buildings are apart on the map.