Choose the three statements that represent a long-term impact of the 1996 summer olympic games in atlanta.

According to the passage a mound is

Raul has one solution that is 20% acid by volume and one solution that is 50% acid by volume. he plans to mix together some of each solution to create 30 milliliters of a solution that is 40% acid by volume. how many milliliters of the 20% acid solution should raul use to create the 40% acid solution? can someone explain this to me? i know that the answer is 10 milliliters, but i don't know how to get it.

You should have your battery and charging system checked . at least once a year b. no more than once a year c. at least twice a year d. no more than twice a year