So you got the answer already
Answer:
12. 56
Step-by-step explanation:
The area of a circle is given by pi×r^2
where r is the radius. The question states That we should use 3. 14 in place of pi.
Area=3. 14×r^2
=3. 14×2^2
=3. 13×4
=12. 56
Answer:
x=4
Step-by-step explanation:
vertical angles are congruent so the equation would be
6x=4x+8
then you subtract 4 on both sides
2x=8
then you divide 2 on both sides then the answer would be
x=4
Answer:
18 gallons from container 
and 22 gallons from the container 
to be mixed to get the required mixture.
Step-by-step explanation:
Given that the container has 20% concentrated cleaner
and container has pure water which has 0% cleaner.
Let x gallons from container a and y gallons from the container b are mixed to get a 9% concentrated solution.
So,
As the total amount of the final solution= 40 gallons
So, 
Using the value of equation (ii) in equation (i), we have
9% of 40 = 20% of x
gallons.
From equation (ii),
18+y=40
gallons.
Hence, 18 gallons from container and 22 gallons from the container to be mixed to get the required mixture.
