Jonathan needs 70 L of 50 proof alcohol solution. He has 30% solution and a 80 solution available how many liters of the 30% solution and how many liters of the 80% solution would he mix to make 50% solution?

Keisha makes a large sandwich for a family picnic she takes 1/2 of them the sandwich to the picnic her family eats 3/8 of the whole sandwich what fraction of the whole sandwich does keisha bring back from the picnic

Which is the graph of the function y=2(4)^x

2.5 milligrams is equivalent to how many grams