The answer to the first question is g. h represents hamburgers. If you take the number of hamburgers and substitute it for h, so 2h= 2 times 36, you get 72. 2 times 50 you get 100. 2 times 49 is 98.
For question 2, h represents hours. The answer to this question is a. 50 is being multiplied by h. So, 50 times 2 is 100. 50 times 3 is 150. 50 times 5 is 250 and so on.
Hope this helped.