A qroup of college students is volunteering for homes for the community during their spring break they are putting the finishing touches on a house they built working alone wade can paint a certian room in 7 hours rhonda can paint the same room on 5 hours how long will it take them working together to paint the room round your answere to the nearest hundereth if necessery

Combined megan and kelly worked 60 hours.kelly worked twice as many hours as megan.how many hours did they each worked?

Find the values of y: 3y^3(y^2+ 2/3y)=0

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)