The answer is A). Five people received the email on the first day on the experiment.
The area of a circle is pi times the radius squared. the radius of this circle is 16.8cm, which is 282cm when squared. multiplied by pi it becomes 887cm.

an is the 'nth' term
a1 is first term
d=common difference (found by doing

)
n=numerical representation of which term
Answer:
E would be closer to A
explanation:
if they were the same distance from both A and E it would be a point on the line CD, and if it was closer to E it would be on the other side of line CD.
i hope this is right :/