Bill can mow the lawn in 2 hours, and his younger brother tom can mow it in 3 hours. if both brothers mow the lawn together, how many hours will it take them?

Plz help plz give me the answer

Which measure is equivalent to 110 ml? 0.0110 l 0.110 l 1.10 l 11,000 l

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 0 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)