Answer:
125.6
Step-by-step explanation:
all you have to do is multiple the 3.14 with 40 cm to get 125.6 cm
5.3 or 5.30 it doesn't matter how many 0's you add
down 3 unit mean -3 outside root
right 2 unit mean -2 inside root,
so the answer is

Answer:
52 cards/hour
Step-by-step explanation:
416 cards
Rodney's card production rate is --------------- = 52 cards/hour
8 hours