Round off each of the following quantities to three significant figures : a. 1.43 cm^3 b. 458 × 10^2cm c. 643 cm^2
Round off each of the following quantities to three significant figures :
a. 1.43 cm3
b. 458 × 102cm
c. 643 cm2
d. 0.039 m
e. 6.398 × 10-3km
f. 0.0179 g
g. 79,000 m
h. 42,150
i. 649.85
j. 23,642,000 mm
k. 0.0041962 kg
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1 Answers
a. 43 cm3
b. 4.58 × 104cm
c. 643 cm2 (or 6.43 × 102cm2)
d. 0.0390 m (or 3.90 × 10-2m)
e. 6.40 × 10-3km
f. 0.0179 g (or 1.79 × 10-2m)
g. 7.90 × 104m
h. 4.22 × 104 (or 42,200)
i. 6.50 × 102
j. 2.36 × 107mm
k. 0.00420 kg (or 4.20 × 10-3kg)
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