Members of a community center are planning a field trip to the zoo. more than 50 people will go on the trip. ten people are providing their own transportation. the rest of the people will ride in k vans. each van can carry 5 people. which inequality can be used to show the situation?
a.5k+10> 50
b. k+15> 50
c.5(k+10)> 50
d.−15> 50

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 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)