The last two numbers are five and four.
Answer:
i believe the answer is A and D
43 and 44, but it's closer to 43
First divide the rocks per 3/4 of an hour by 3 and multiply by 4 to get the production per hour. then subtract the already moved rocks from the total job and divide the answer by 16 (the rocks moved per hour) getting the time needed to move the rest
3 + 2n = 15
hope this helps