Answer:
D 81 pi units^2
Step-by-step explanation:
The circumference of a circle is given by
C = 2 * pi *r
18 pi = 2 * pi *r
Divide each side by 2 * pi
18 pi / (2 pi) = 2 pi * r/ (2 pi)
9 = r
Now we can find the area. Area is given by
A = pi r^2
A = pi * 9^2
A = 81 pi units^2
all "atomic" or constituent statements are true
at least one "atomic" or constituent statement is true
Answer:
The circle's diameter is 
Step-by-step explanation:
we know that
The circumference of a circle is equal to

where
D is the diameter of the circle
In this problem we have


substitute the values and solve for D


Answer:
x=-15/2
Step-by-step explanation:
Answer:
a ≠ 2
Step-by-step explanation:
Given

The denominator of the rational function cannot be zero as this would make it undefined. Equating the denominator to zero and solving gives the value that a cannot be, that is
- 3a + 6 = 0 ( subtract 6 from both sides )
- 3a = - 6 ( divide both sides by - 3 )
a = 2 ← excluded value