2 Finding Sig Figs

OCEAN METHOD explanation: Decimal is PRESENT - so PACIFIC OCEAN (left side of number) - find the first number that is not a zero (5) - once it is found that number is significant and everything after it is also significant
RULES METHOD explanation: RULE 3) Leading zeros are never significant

OCEAN METHOD explaination: Decimal is PRESENT - so PACIFIC OCEAN (left side of number) - find the first number that is not a zero, it is a (1) - once it is found that number is significant and everything after it is also significant
RULES METHOD explaination: The numbers 1 thru 9 are always significant
RULES METHOD: RULE 1) Numbers 1,2,3,4,5,6,7,8,9 are ALWAYS significant.

OCEANS explanation: the decimcal if absent, so start on the Atlantic ocean side and find your first number that is a 1,2,3,4,5,6,7,8,9. The 1 is the only number that qualifies.
RULES explanation: Trailing zeros are only significant if there is a decimal. No decimal, so those 2 zeros are not significant.

OCEAN METHOD explanation: Decimal is ABSENT - so Atlantic OCEAN (right side of number) - find the first number that is not a zero, it is a (5) - once it is found that number is significant and everything after it is also significant
RULES METHOD: Trailing zeros are only significant if there is a decimal.
RULE METHOD explanation: RULE 4) Trailing zeros are only significant if there is a decimal

OCEAN METHOD: Decimal is ABSENT - so Atlantic OCEAN (right side of number) - find the first number that is not a zero, it is an (8) - once it is found that number is significant and everything after it is also significant
RULES METHOD: Zeros sandwiched between numbers 1 thru 9 are significant.
RULES METHOD: RULE 2) Zeros smashed between 1-9 are significant.

OCEAN METHOD explanation: Decimal is PRESENT - so PACIFIC OCEAN (left side of number) - find the first number that is not a zero, it is a (3) - once it is found that number is significant and everything after it is also significant
RULES METHOD explanation: Rule 4) Trailing zeros are only significant if there is a decimal

Sig figs, or significant figures, are a way to indicate the precision or accuracy of a measurement. They are used to show the number of reliable digits in a measurement. Therefore, only measurements have significant figures, as they are the values that are being measured and have a certain level of precision associated with them. Other types of data or information may not have sig figs as they may not involve measurements or quantifiable values.

Sig figs are only in measurements. You can count students, counting is NOT a measurement.

Only measurements have sig figs. 420 apples has NO sig figs because it is NOT a measurement. Things you can count do NOT have sig figs. Counting is not a measurement

The question says find the measurement with 6 sig figs. The number of people is not a measurement. It is a counting number.

Only measurements have sig figs. Atoms and cents are not measurements, therefore do not have sig figs.