Answer:
B (169)
Step-by-step explanation:
Answer:
Step-by-step explanation:
We need to multiply
We know the exponent rule of multiplication:
If the bases are same the powers are added.
So,
So, the answer is:
Answer:
0.11111....
Step-by-step explanation:
. ......... .....
wait I was wrong
Answer:
Option b is the correct answer
Step-by-step explanation:
The new mixture has a total volume of 5 L + 9 L = 14 L.
70% of the 5 L alcohol solution is alcohol, so that it contributed 3.5 L of alcohol to the mixture. The pure water contributed no alcohol. So in the mixture, the concentration of alcohol is
3.5 L / 14 L = 0.25, or 25%