Question

Another one

Answer 1

You just use that formula they gave..

measured value - 2.80
Actual Value - 2.70

Answer 2

Oh I totally read it wrong

Answer 3

She found the answer to be -3.703

Answer 4

Looks good except have to keep only 3 sig fig
3.70%

Answer 5

So it turns positive?

Answer 6

Can I post the other ones on here @DanJS

Answer 7

It should be positive
\[\frac{ (2.8-2.7)*100 }{ 2.7 }=\frac{ 10 }{ 2.7 }\approx3.70\]

Answer 8

Sure post more

Answer 9

The first one she got 2605.4 as significant and the second one she circled only the 1

Answer 10

There are a couple rules about sig figs if you want me to go through them...

Otherwise the first is 6 and the second is 1

Answer 11

There are a couple things about zeros, and if they are counted or not

Answer 12

I'm confused lol I thought it was all of them too. These are the rules she has

Answer 13

1. All non zero digits are SD
2. Zeroes that occur between SDs are SDs
3. Zeroes that are to the right of the decimal and to the right of a non zero digit are SDs

Answer 14

Right. Basically -- if zeros are only holding a place, they don't count. Placeholder zeroes. like in
0.00001 --- 1 sig fig

But if there was another digit like
2.00001 --- 6 sig fig
0.20001 ---5 sig fig
0.02001 ---4sig fig

Answer 15

The zeros between sig figs count like those

Answer 16

Or if you have the trailing zero on the decimal left...

2.250 -- 4 sig fig

That last zero is measured and written, otherwise no need to write that zero

Answer 17

That's all i can think of

Answer 18

Any other ones?