Answer:

round off to 3s.f
means change to when you have 3 useful numbers
7613.83 has 4numbers.2decimal
same must be the round off value
Answer:
the first option
Step-by-step explanation:
Just choose x = 0,1,2,3 and find y for each x, for each of the tables.
612.00 in scientific notation is 6.12×10^2