Part A: The animals are used for examining and determining the effect of a particular new drug for the treatment of the diseases and disorders before they are examined over humans. This practice is called as clinical trial.
The ethical issue associated with given type of testing is that animals have right to live and survive. They should not be subjected to the treatment where they experience harm or even death.
Part B: Those assigned to the control take a sugar pill. The only thing you want to vary across groups when you're conducting an experiment is the treatment. Since taking pills is a part of taking medication (the treatment), medical experiments often employ something called a placebo-controlled study where outcomes for those who are randomly assigned to take the medication are compared to outcomes for those who are randomly assigned to take a sugar pill. The sugar pill is expected to have no effect, so it serves as a useful baseline to compare the treatment to.
Have a good day!!!! <3<3
Assuming that by "16t2" you mean 
:
First of all, let's compute the position at the two required times:
So, the ball traveled a total distance of 
, during the time 
.
The average rate of change is the ratio between these two:
1 4/5 - 2/5 = r you minus the total she has already walked or ran from the total she plans on running to get “r”
