Question

I need help with chemistry math....significant figures. What is the answer to: 12cm+0.031cm+7.969cm ? please help!

Answer 1

20cm

Answer 2

20 cm

Answer 3

\[12+0.031+7.969= 20\]

Answer 4

simple math

Answer 5

use a calculator if you really don't know for next time

Answer 6

I would get 20.000 would those extra zeros not matter?

Answer 7

no

Answer 8

@livya15

Answer 9

why not? I don't mean to be annoying but this doesn't make sense to me :(

Answer 10

@jjedmkmv

Answer 11

ok what doesnt make sense

Answer 12

why don't those extra zeros matter??

Answer 13

because if I would say how significant figures 20.000 has I would say 5

Answer 14

because they are after the decimal point

Answer 15

ok thankyou!!!

Answer 16

you welcome

Answer 17

what if I got an answer like 0.287cm?

Answer 18

how would you have gotten that answer?

Answer 19

another problem.... 0.085cm+0.062cm+0.14cm

Answer 20

ok so what you do is you take cm out of the equation
then you open calculator
and it does it for u

Answer 21

0.085+0.062+0.14

Answer 22

ok thanks again