Or........
We already know 12 x 12 =144. So all you could do isis add 12 to 144 to get your complete answer. Which is:
12 x 13 = 156
30/1 is equivalent to 30 and 60/2, and other numbers.
Mean = sum of values / number of values
74 = x/32
2368 = x
70 = y/19
1330 = y
mean for female students = (2368 - 1330)/(32-19) = 79.85
The second one. The octagon.
This is because all of the other choices are equal sided, which makes them a regular polygon.
The answer is 32.45, I’m pretty sure you just add everything up.