Distribute the exponent in the numerator:
Then if 
, we can cancel one of each 
in the numerator and denominator:
Finally, the square of 10 is 100, and 100 divided by 5 is 20, so we're left with (C),
Since there are 3 people, you divide the total cost by 3.
The expression is (15+6)/3 or 21/3 or 7.
Beacuse <span>A square by definition is a "plane figure having four equal sides." Rectangles' sides are not equal and hence cannot be a square.
A rectangle by definition is a "four-sided plane figure with 4 right angles" - which also implies that a square can be a rectangle because it is also a four-sided plane figure with 4 right angles...... hope this helps</span>
When a set of data is divided into quarters, the quarters are known as QUARTILES.
