Question

HELP! How many significant figures are in the number 70.80?

Answer 1

Three.

7, 0, and 8. The 0 after the 8 is not significant because you do not need it.

Answer 2

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Answer 3

Can you help me with a couple more?

Answer 4

3. 7, 0 and 8

Answer 5

So there would be four instead of 3 in 70.80?

Answer 6

there's 4 significant figures

Answer 7

Thank you so much. Could you please help me with a couple more?

Answer 8

http://openstudy.com/study#/updates/54133dd1e4b0670f101539e3 please help me also when you get the chance because I know you all smart people :)

Answer 9

1. 0.0056
2.5400
Could you help me with those two?

Answer 10

Zeros in between numbers and trailing zeros or zeros to the right are significant.
now try to figure the answers out

Answer 11

Okay, thank you. I will try

Answer 12

Would there be two in 0.0056?

Answer 13

yep

Answer 14

could anyone help me with one more? This question says to add 2.4 +2.47. It asks for the correct answer in significant figures.

so would I add the 2.4+2.47.? and then find out how many significant numbers are in it?

Answer 15

4.
When the issue of significance arises, then the trailing zero is significant.

Answer 16

the answer for the 2.4 + 2.47 wouldn't be 3?

Answer 17

first, add the numbers. what you've got?

Answer 18

4.87

Answer 19

now, among the two addends, which one is having the least significant figure?

Answer 20

4?

Answer 21

between, 2.4 and 2.47

Answer 22

2.4?

Answer 23

yes. how many significant figures are there?

Answer 24

2

Answer 25

yes that's correct. now round the sum up such that it would have 2 significant figures.

Answer 26

would my answer be 4.87?

Answer 27

no.. the sum of the two numbers is 4.87 yet it will follow the number of significant of the addend with the least significant figures so you will round it off to 2 significant figures