Question

1. how many significant figures are in each underlined measurement?

a. 60 s = 1 min
b. 47.70 g of copper
c. 1 km = 1000 m
d. 25 computers
e. 9 innings in a baseball game
f. 0.0950 m of gold chain

Explanation:

Step1: Identify significant - fig rules

Non - zero digits are always significant. Trailing zeros in a number with a decimal point are significant. Leading zeros are not significant.

Step2: Analyze a. 60 s

The number 60 has 2 significant figures as both 6 and 0 are significant.

Step3: Analyze b. 47.70 g

The number 47.70 has 4 significant figures. Non - zero digits 4, 7, 7 and the trailing zero after the decimal are significant.

Step4: Analyze c. 1000 m

The number 1000 has 1 significant figure as trailing zeros without a decimal point are not significant.

Step5: Analyze d. 25 computers

The number 25 has 2 significant figures as both 2 and 5 are non - zero.

Step6: Analyze e. 9 innings

The number 9 has 1 significant figure as it is a non - zero digit.

Step7: Analyze f. 0.0950 m

The leading zeros are not significant. The non - zero digits 9, 5 and the trailing zero after the 5 are significant. So it has 3 significant figures.

Answer:

a. 2
b. 4
c. 1
d. 2
e. 1
f. 3