Answer:
21.
Step-by-step explanation:
We have 5% and 6.5% acetic acid solutions and we need 200 ml of 6% acetic acid.
Set up two equations:
f means 5% and s means 6.5%
A) f + s = 200
B) .05f + .065s = (.06 * 200)
Multiplying equation A by -.05
A) -.05f -.05s = -10
B) .05f + .065s = 12 then adding both equations:
.015s = 2
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<span>
we need 133.33</span> ml of 6.5% acetic acid and
66.67 ml of 5% acetic acid solution.
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Source:
http://www.1728.org/mixture.htm
do it step by step will it work yes
Answer:
1 5/8 inches
Step-by-step explanation:
It can work out well to subtract integer portions and fractional portions, then combine the results.
(9 1/4) -(7 5/8) = 9 + 1/4 - 7 - 5/8
= (9 -7) +(1/4 -5/8)
= 2 + (2/8 -5/8)
= 2 -3/8
= 1 5/8
The piece of Myles' shoestring that broke off is 1 5/8 inches long.
