PLEASE HELP
a skier crosses a 100m flat section past the chair lift at a constant velocity of 6m/s, then accelerates downhill at a rate of 0.5m/s^2 until reaching a maximum velocity of 12m/s.
a) how long did it take them to speed up?
b) if the skier maintains the 12m/s speed for an additional 20s to the bottom of the hill, what is the total displacement of the skier after they got off the chairlift?

The difference between two numbers is 15. when twice the smaller number is subtracted from three times the larger number, the difference is 58.what is the larger number?

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

Which governments provide garbage collection services to homes and businesses