First off Jackson's mom sucks for limiting game time and second of the answer is 30 minutes. If 9 is 30 percent that means 3 is 10 percent. 3 times 10 is 30. So 30 minutes
We have 10 ml of 20% acid to which we need to add "x" milliliters of 100% acid to make 50% acid.
.20 * 10 + 1.00x = .50 * (10 +x)
in which "x" is the volume of the 100% acid to be added.
2 + x = 5 + .5 x
.5x = 3
x = 6 milliliters
Source:
http://www.1728.org/mixture.htm
Scroll down to problem B
A because it’s the only one that makes the best sense
B does not make sense it is the opposite of what ur trying to find
C is not a correct percentage, the correct Percentage would be 53.84%
D which can’t be correct because choice b and c are not correct
20(1-p)
20(1-0.25)
20(0.75)
=15
so the sale price is $15
hope this helps !
First multiply 20 by 17
second multiply 8 by 17
then you have to add 20 by 8 which will give you 28
so,476 divided by 17 gives you 28
