Some students want to know if residents of their town are in favor of building a new school. Kevin surveys all of the residents
1 answer:
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Answer:
The number 1 is not necessary when expressing powers of one. For example, you needn't write "5" as .
Step-by-step explanation:
Given:
A circle of radius r inscribed in a square.
To find:
The expression for the area of the shaded region.
Solution:
Area of a circle is:
Where, r is the radius of the circle.
Area of a square is:
Where, a is the side of the square.
A circle of radius r inscribed in a square. So, diameter of the circle is equal to the side of the square.
So, the area of the square is:
Now, the area of the shaded region is the difference between the area of the square and the area of the circle.
Therefore, the correct option is (a).
For this case we must factor the following quadratic expression:
To factor, we must find two numbers that when multiplied give as result +9 and when added or subtracted give as result -6.
These numbers are:
-3 and -3
So, we have:
ANswer:
Option D