1. If you mixed 8.0 tons of sand, 12 tons of rock, and 4.0 tons of cement to make concrete, what would the %weight of sand be?

2. If you have a mixture of 10Ib, sunflower seeds which cost 32¢ per pound and 16 Ib. of cracked corn which cost 18¢ per sound, how much would is mixture cost per pound.