Bro i did the same test [i picked c. for my answer]
Answer:
I've shown the process in the picture .
hope u understand
It would last 13.5 weeks because you would make a proportion:
12/16 = x/18 and then cross multiply. You would get 216=16x, then you have to divide both sides by 16 to get x = 13.5
35+45=80
180-80=100
The third angle is 100 degrees
10^2 equals 100
10 x 10=100