Answer:
x
=
3.5
=
2.5
=
0
=
5
X
=
Step-by-step explanation:
Answer:
A =452.16 m^2
Step-by-step explanation:
The diameter is 24, so the radius is 1/2 of the diameter
r = 24/2 = 12
The area of a circle
A = pi r^2
A = 3.14 * (12)^2
A =452.16 m^2
Answer: A (10)
Step-by-step explanation:
126 liters of pure water should be added
<em><u>Solution:</u></em>
Let "x" be the liters of pure water
Then, 18 + x is the liters of final solution
18 Liter solution of 80% acid, which means 100 - 80 = 20 % of water is used
Pure water is 100%
Then according to question, we can say,
"x" liters of pure water 100 % is mixed with a 18 liter solution of 20 % water to produce a mixture (18 + x) liter that is 90 % water
Thus we frame a equation as:
Equation:
water + water = water
Thus 126 liters of pure water should be added