I would believe it is c the third one im not 100% sure
Answer:
The square root of 18 with one digit decimal accuracy is 4.2.
Step-by-step explanation:
1) 0.07 zeros only matter if there is a non-zero digit, as well as the decimal to the left of it
2)90,000 it would have been 89000 if the 972 had been an 872
3).00420 must include the last zero, it is considered significant because of the reason in number one