Answer:
Pretty sure it would be b because it keeps scaling as the x axis continues with time
Answer: 23
Step-by-step explanation: a P e X
In order to find out the answer , you just need to count :
Let's say that mary's collection is symbolized by x
2/3 x = 4h
x = 3/2 . 4h
x = 6h
The storybooks they have in total would be : 6h + 4h = 10 h
hope this helps