Answer:
3,535 cm
Step-by-step explanation:
55cm=88km
Let's make that "one unit" - 55cm=1 unit. How many units are in the distance 5656km?
5656km/88km=64.2727... units.
55cmx64.2727... = 3,534.999 cm (depending on what your teacher requires, we can probably round to 3,535).
Therefore, we know that the two cities are 3,535 cm apart on the map.
The answer is c I would wait for other answers I'm not sure thats exactly right
THE SURFACE AREA IS 3220CM^2
Let x represent the amount of 10% solution used.
Let y represent the amount of 25% solution used.
Since 30 liters of 15% solution are being made, our first equation is
x + y = 30
Now we deal with the actual peroxide in each solution.
x liters of 10% peroxide contain 0.1x liters of peroxide.
y liters of 25% peroxide contain 0.25y liters of peroxide.
30 liters of 15% peroxide contain 0.15 * 30 = 4.5 liters of peroxide.
From this information, we can write our second equation.
0.1x + 0.25y = 4.5
We have a system of equations:
x + y = 30
0.1x + 0.25y = 4.5
Multiply the first equation by -0.25 and add to the second equation.
-0.25x - 0.25y = -7.5
0.1x + 0.25y = 4.5
---------------------------
-0.15x = -3
x = 20
Answer: 20 liters
