Tính giới hạn sin^2x /1-cos3x

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Non-euclidean geometry was discovered when, in seeking cleaner alternatives to the fifth postulate, it was found that the negation could also be true a. true b. false

Simplify. 3(4+4x) (type your answer in with no spaces)