Answer:
13 l of 15%, 13 l of 25%, 26 l of 70%
Step-by-step explanation:
solutions:
final solution:
This includes 0.45*52l= 23.4 l acid
Let's assume:
- amount of 15% solution= x
- amount of 25% solution= y
- amount of 70% solution= z
- and we have z=2y
so there are 2 equation:
or
- x+y+2y= 52 ⇒ x+3y= 52 ⇒ x= 52- 3y
- 0.15x+1.65y=23.4
- 0.15*(52-3y)+1.65y=23.4
- 7.8-0.45y+1.65y=23.4
- 1.2y=23.4-7.8
- 1.2y= 15.6
--------
- x= 52- 3*13= 13 l
- z= 2y= 2*13= 26 l
Answer:
6.63
Step-by-step explanation:
I think it could 78 because well i dont think it is right but try if you take away 10 from 16 you would get 6 then if you add 20 to 68 you would get 88 and if you you take away 100 from 88 you would get the 78 and then you would add 20 so you would get 98
Answer:
168.61
Step-by-step explanation:
C=2*Pi*R
C=2*3.14*26.85
C=6.28*26.85
C=168.61
