Question

Round off each of these measurements to three
significant figures.
a.98.473 L
b.0.000 763 21 cg
c.57.048 m
d. 12.17°C
e. 0.007 498 3 * 10^4 mm
f. 1764.9 mL

Answer 1

A) 98.5 L
B) 0.000 763 cg, nulls at the beginning are not significant
C) 57.1 m
D) 12.2 C
E) 0.00750 * 10^4 mm, last null is significant in the end of decimal number
F) convert first to litres, try then yourself

Answer 2

1.7649 liters
1.76

Answer 3

Fine! You got it!

Answer 4

i still dont understand b and e....

Answer 5

These can be expressed in another way:

0.00076321 cg = 0.000 0076321 g
Null in front of other numbers in decimal number are not negative,

So this could be 0.000 00763 g

Answer 6

E) could be 74.983 mm = 75.0 mm
Does this help?

Answer 7

wouldnt i like have to make it scientific notation?

Answer 8

D) is 7.63*10^-6 g

Answer 9

for b so i wouldnt have to put it into scientific notation....?