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quokkamokka97
07.07.2019 •
Mathematics
You need a 45% alcohol solution. on hand, you have a 350 ml of a 15% alcohol mixture. you also have 70% alcohol mixture. how much of the 70% mixture will you need to add to obtain the desired solution?
you will need
ml of the 70% solution
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Ответ:
420
Step-by-step explanation:
Amount in the 45% solution + amount in the 70% solution = amount in the 45% solution
0.15 × 350 + 0.70 × V = 0.45 × (350 + V)
52.5 + 0.70V = 157.5 + 0.45V
0.25V = 105
V = 420
You need 420 mL of the 70% solution.
Ответ:
Age of Mia=13.31 years
Step-by-step explanation:
We are given that Mia is minutes old.
We have to find Mia's age in appropriate units.
6 months have 30 days and 6 months have 31 days.
Total number of days in one year=366 days
We know that in one day=24 hours
In one hour=60 minutes
Age of Mia=
Age of Mia=13.31 years