The volume of 10% solution will be 6 l and 9 litre of the 30 % solution will be taken.
<h3>What is Volume ?</h3>
Volume is the space occupied by a three dimensional object .
The concentration of solution required is 22% acid
The concentration of solution available is 10% and 30%
The total volume required is 15 liters
The formula for making a mixture is
Concentration = ( m₁x₁ +m₂x₂) / (x₁+x₂)
22 = (10 * x + 30 *(15 -x))/( 15)
10 x + 450 - 30x =330
-20x = -120
x = 6
The volume of 10% solution will be 6 l
and 9 litre of the 30 % solution will be taken.
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a = adult shirts sold
c = children shirts sold
we know the store sold for every 5 "a", there were 3 "c" sold, so we can say that the adult to children shirts are on a 5 : 3 ratio.
We also know that whatever "c" is, adult shirts sold last weekend was 30 more than that, or namely "c + 30".
![\stackrel{\textit{\large ratios}}{\cfrac{\stackrel{adult}{a}}{\underset{children}{c}}~~ = ~~\cfrac{5}{3}}\qquad \implies \qquad \stackrel{\textit{we also know that \underline{a = c + 30}}}{\cfrac{c+30}{c}~~ = ~~\cfrac{5}{3}} \\\\\\ 3c+90=5c\implies 90 = 2c\implies \cfrac{90}{2}=c\implies \boxed{45=c}~\hfill \stackrel{c + 30}{\boxed{a=75}} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill \stackrel{total~sold}{120}~\hfill](https://tex.z-dn.net/?f=%5Cstackrel%7B%5Ctextit%7B%5Clarge%20ratios%7D%7D%7B%5Ccfrac%7B%5Cstackrel%7Badult%7D%7Ba%7D%7D%7B%5Cunderset%7Bchildren%7D%7Bc%7D%7D~~%20%3D%20~~%5Ccfrac%7B5%7D%7B3%7D%7D%5Cqquad%20%5Cimplies%20%5Cqquad%20%5Cstackrel%7B%5Ctextit%7Bwe%20also%20know%20that%20%5Cunderline%7Ba%20%3D%20c%20%2B%2030%7D%7D%7D%7B%5Ccfrac%7Bc%2B30%7D%7Bc%7D~~%20%3D%20~~%5Ccfrac%7B5%7D%7B3%7D%7D%20%5C%5C%5C%5C%5C%5C%203c%2B90%3D5c%5Cimplies%2090%20%3D%202c%5Cimplies%20%5Ccfrac%7B90%7D%7B2%7D%3Dc%5Cimplies%20%5Cboxed%7B45%3Dc%7D~%5Chfill%20%5Cstackrel%7Bc%20%2B%2030%7D%7B%5Cboxed%7Ba%3D75%7D%7D%20%5C%5C%5C%5C%5B-0.35em%5D%20~%5Cdotfill%5C%5C%5C%5C%20~%5Chfill%20%5Cstackrel%7Btotal~sold%7D%7B120%7D~%5Chfill)
Answer:

Step-by-step explanation:
The total surface area simply consists of three rectangles and two triangles. To find the total surface of the figure, find the sum of each of the shapes that make up the outside of the figure:
2 triangles: 2 x 1/2 x 6 x 8 = 48 ft^2
First rectangle: 6 x 12 = 72 ft^2
Second rectangle: 8 x 12 = 96 ft^2
Third rectangle: 10 x 12 = 120 ft^2
*Note: One of the dimensions is in yards, so make sure to convert it to ft (1 yd = 3ft)
Thus, the total surface area of the figure is 48+72+96+120 = 336 ft^2.
2 hr 15 min = 2

hours = 2.25 hours
"how far" means distance ... so distance = rate x time
distance = 56 x 2.25 =
126 miles
"how long" means time ... so using the same formula
168 = 56 x time
divide both sides of the equation by 56 to solve
3 hours = time
Step-by-step explanation:
A=½bh
A=½(4•3)
A=½(12)
A=6 units sq