Venn diagrams contain how many sets, depicted by circles?
a. 1
b. 2
c. 3
d. 4
e. unlimited

How can you find the mean absolute deviation (mad) for this set of data?

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?

£100.80 divided by 14 equals 7.2 how would we put this as money