A Michigan orchard made 19,264 pounds of taffy approximately 1 pound of taffy mixture for each 75.6 pounds of apples . To the nearest tenth of a pound, how many pounds of apples and how many pounds of taffy were used.

In a mixture of concrete, there are four pounds of cement mix for each pound of gravel. If the mixture contains a total of 90 pounds of these two ingredients how many pounds of gravel are there?