How long do students have to complete the math section of the Aspire test?

Compared with the cost of tuition, fees, and books for a traditional college course, the cost of a clep exam is:

The fairies in disney's sleeping beauty are named fand maleficent. which name contains a root meanina. florab. faunac. merryweatherd. maleficent

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.