Question

Write the numbers into 1 significant figures
a) 6456​

Answer 1

Answer:

$6.456 \times {10}^{3}$

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Answer 2

Answer:

I am giving a example which will help you

Step-by-step explanation:

e.g. In 64,492 , 6 is the first significant figure.(sig.fig.) When we round off 64,492 to two sig. figs, that means in the answer we should have two non zero figures.The third figure(which is 4) is less than 5, so we drop them to zeros.

Let's round off 64,492 to:

(a) 1 significant figure which is 60,000

(b) 2 significant figures which is 64,000

(c) 3 significant figures which is 64,500

(d) 4 significant figures which is 64,490

(e) 5 significant figures which is 64,492

The accuracy of the answer will depend on the number of significant figures. The answer will be more accurate, if it is given to a higher number of significant figures.

64,492 is the most accurate answer and it is given to 5 sig. figs.

*** The trailing zeros in a whole number are not significant.There are used to keep the other figures in there correct places.

eg. 64000 6 and 4 are significant not the zeros.

*** The leading zeros in a decimal are not significant. There are used to keep the other figures in there correct places.

eg. 0.000054 , only 5 and 4 are significant.

***The zeros between the figures are significant.

eg. 30.05 each figure is significant. There are 4 sig.figs.

*** The last zero in a decimal is significant.

eg. 3.20each figure is significant. There are

3sig.figs.

eg. 0.50, 5 and last zero are significant.There are

2 sigfigs