Question

3) Rounding off: i) 0.00004215 round off to 3 significant figures. Ii) 36.0098 round off to 3 decimal figures.​

Answer 1

Step-by-step explanation:

To round to three significant figures, look at the fourth significant figure. It's a 5 , so round up.

To round to four significant figures, look at the fifth significant figure. It's a 1 , so round down.

To round to two significant figures, look at the third significant figure. It's an 8 , so round up.

Answer 2

Answer:

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Step-by-step explanation:

To round off it to 3 significant digits, we required to round it off to 1 place after the decimal. Therefore, 53.214 = 53.2 rounded off to 3 significant figures. [The digit in hundredths place is 1 which is less than 5. So, the digit in the tenths place remains 2 and the digits 1 and 4 disappear.]