Answer:
10.1%
Step-by-step explanation:
The first thing we should do is calculate the total volume of the solution when mixing them would be:
0.7 + 0.3 = 1
Now, we have that the resulting concentration (x) would be equal to the sum of the multiplications between the volumes and the concentrations to be mixed, as follows:
x * 1 = 0.7 * 0.05 + 0.3 * 0.22
x = 0.035 + 0.066
x = 0.101
That is, the concentration of the resulting mixture would be 10.1% (0.101 * 100)
Answer:
2.63901582155
Step-by-step explanation:
28 / 7 = 4
3 x 4 = 12
It’ll take him 12 minutes
1/4 of x is 6 ⇒ 1/4 x = 6
1/4 x = 6
<u>Multiply 4 on both sides:</u>
x = 24
Answer : x = 24
I think it’s the 3rd option
