To determine if a drug has an effect on patient illness, a researcher gives the drug to 100 patients and gives a placebo to another group of 100 patients.
What type of study is this?
DONE
) Intro

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.