anonymous
  • anonymous
Solve the problem, expressing your answer using the correct number of significant. 75.6*12.33
Mathematics
  • Stacey Warren - Expert brainly.com
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
75.6 x 12.33 = 932.148 I hope this helps but im not exactly sure
anonymous
  • anonymous
assuming the math in the above post is right, the final answer is 932, as you should use 3 significant figures for the final answer
anonymous
  • anonymous
i just need to multiply them?

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anonymous
  • anonymous
yes, multiply them...the number of significant figures in the final answer will be the same as the number of significant figures in the least precise term (the term with the fewest significant figures)
anonymous
  • anonymous
75.6 has 3, 12.33 has 4, so final answer has 3 significant figures
anonymous
  • anonymous
okay so for this one 31.5+124.6-23.199 equals= 132.901?
anonymous
  • anonymous
how do i find the significant fig?
anonymous
  • anonymous
31.5 has 3, 124.6 has 4, 23.199 has 5 significant figures are non-zero digits and also zeros between non-zero digits
anonymous
  • anonymous
okay, if it equals 132.901?
anonymous
  • anonymous
is it 3 significant fig?
anonymous
  • anonymous
im sorry, i was wrong earlier. you're looking for the decimal places, not significant figures. so in the first answer you'd want 1 decimal place, second answer you'd also want 1 decimal place
anonymous
  • anonymous
wait im so lost now :( lol
anonymous
  • anonymous
ok i lost you even further because i was right in the first one
anonymous
  • anonymous
whaaaaaaat! lol
anonymous
  • anonymous
in multiplication, you want the same number of significant digits. in addition, you want the same number of decimal places
anonymous
  • anonymous
wait, we're doing significant figures right? lol
anonymous
  • anonymous
yes, in multiplication, the answer has the same number of significant figures as the least accurate measure. in addition, answer has same number of decimal places, not significant figures
anonymous
  • anonymous
im sooooooo lost lmfao, but okay :l
anonymous
  • anonymous
so it equals 132.901 then what do i do?
anonymous
  • anonymous
so 75.6*12.33, answer has 3 significant figures 31.5+124.6-23.199, answer has 1 **decimal place**
anonymous
  • anonymous
but i do have to add & subtract it right?
anonymous
  • anonymous
of course
anonymous
  • anonymous
so it stays as 132.901?
anonymous
  • anonymous
you only want 1 decimal place, so 132.9
anonymous
  • anonymous
http://www.wellesley.edu/Astronomy/kmcleod/Toolkit/sigfigs.html
anonymous
  • anonymous
i dont understand this :|
anonymous
  • anonymous
you don't understand significant figures in general or how to determine how many a product or result of addition have?
anonymous
  • anonymous
how to determine how many a product or result of addiction have!!!!!
anonymous
  • anonymous
:(
anonymous
  • anonymous
75.6*12.33 how many significant figures are in 75.6 and 12.33?
anonymous
  • anonymous
75.6 has 3 and 12.33 has 4 right?
anonymous
  • anonymous
right
anonymous
  • anonymous
so, in multiplication, the answer has to have the same number of SF as the term with the least number of SF
anonymous
  • anonymous
because 3 is less than 4, answer has 3 SF
anonymous
  • anonymous
okay, what about for adding & subtracting?
anonymous
  • anonymous
ignore the SF, count the decimal places
anonymous
  • anonymous
so the one with the least decimals?
anonymous
  • anonymous
right
anonymous
  • anonymous
so it will be one decimal right?
anonymous
  • anonymous
yes
anonymous
  • anonymous
okay so if the answer was 132.901 how do i know which number to take out?
anonymous
  • anonymous
how many decimal places do you need?
anonymous
  • anonymous
1?
anonymous
  • anonymous
how many do you have?
anonymous
  • anonymous
3
anonymous
  • anonymous
?????
anonymous
  • anonymous
yes, so what do you do?
anonymous
  • anonymous
lol, i dont know what to do :( lmfao i would say just subract 1 and take off 2? lol
anonymous
  • anonymous
you round to the nearest tenth 132.901 is approximately 132.9
anonymous
  • anonymous
if your answer was 132.999, you'd round to 133.0
anonymous
  • anonymous
OHHHHHHHHHHHHHHH! lol lol
anonymous
  • anonymous
assuming you wanted 1 decimal place
anonymous
  • anonymous
GOT IT! okay can you help me with another? ima try to do it first and tell me if im right or wrong?
anonymous
  • anonymous
ok
anonymous
  • anonymous
wait what about when dividing?
anonymous
  • anonymous
o:
anonymous
  • anonymous
dividing is the same as multiplying by the reciprocal, so same rules
anonymous
  • anonymous
okay so for 2+4.5+23.52
anonymous
  • anonymous
2=1 4.5=2 23.52=4 right?
anonymous
  • anonymous
so i have to go for the one that has the least SF, which is one correct? o:
anonymous
  • anonymous
yeah, thats how many SF each has, but you ignore SF for addition/subtraction
anonymous
  • anonymous
omg what? lol ima get lost again :( well i got 30.02 o:
anonymous
  • anonymous
how many decimal places does 2 have?
anonymous
  • anonymous
2?
anonymous
  • anonymous
the number 2?
anonymous
  • anonymous
it has no decimal places
anonymous
  • anonymous
omg this is sooo confusing!!! lmfao what do you mean it doesnt?
anonymous
  • anonymous
EXPLAIN PLZ
anonymous
  • anonymous
a decimal place isn't the same thing as a significant figure for example the number 50.24589 has 7 significant figures, but 5 decimal places
anonymous
  • anonymous
5 decimals becuz its after the decimal right?
anonymous
  • anonymous
yeah, there is no decimal in the number 2, so there are no decimal places
anonymous
  • anonymous
so if using it in addition accounting for SF, your answer should have no decimal places
anonymous
  • anonymous
wait thats where im confused, because you said 50.24589 has 5 decimal places but for 30.02, doesnt it have 2 decimal places?
anonymous
  • anonymous
yes, i was using that number as an example
anonymous
  • anonymous
i know, omg im getting really confused! okay 50.245989 right? why does it have 5 decimal places? bceuz after the decimal it has 5 number right?
anonymous
  • anonymous
yes
anonymous
  • anonymous
okay so for 30.02, after the decimal it has 2 numbers doesnt it? thats where im gettng confused
anonymous
  • anonymous
yes it has 2, that is the answer to the addition you wanted, but you have to get rid of the decimal places by rounding to the nearest whole number because you don't want any decimal places in your answer
anonymous
  • anonymous
okay, so it will be just 30? o:
anonymous
  • anonymous
right
anonymous
  • anonymous
so then it will have 2 SF?
anonymous
  • anonymous
SF don't matter in additon, remember
anonymous
  • anonymous
ugh i wont remember this lol
anonymous
  • anonymous
help me some more? lol
anonymous
  • anonymous
ok
anonymous
  • anonymous
thank you very much!
anonymous
  • anonymous
99.9/12.23
anonymous
  • anonymous
99.9 = 3 12.23= 4
anonymous
  • anonymous
yep
anonymous
  • anonymous
= 8.1684........
anonymous
  • anonymous
how do i do this one?
anonymous
  • anonymous
you want 3 SF, so you round to the nearest hundredth
anonymous
  • anonymous
how do i know what to round to? like if im suppose to round to the tens hund, thous?
anonymous
  • anonymous
for multiplication, you count, starting from the left,the digits, and stop and stop at the 3rd one in this case because you want 3 SF, you round that number
anonymous
  • anonymous
for multiplication, you count, starting from the left,the digits, and stop and stop at the 3rd one in this case because you want 3 SF, you round that number
anonymous
  • anonymous
hmm okay, so i round 8.168?
anonymous
  • anonymous
so it will be 8.17?
anonymous
  • anonymous
yes, you round the 6 up to 7 because the next digit is greater than 5
anonymous
  • anonymous
so 8.17 is my answer right?
anonymous
  • anonymous
greater than or equal to 5, that is
anonymous
  • anonymous
yes, 8.17
anonymous
  • anonymous
YAY!! okay here another 9.01*12
anonymous
  • anonymous
so its gonna be only 2 SF
anonymous
  • anonymous
yes
anonymous
  • anonymous
=108.12
anonymous
  • anonymous
so then? lol the part where i get confused. does it stay as 108?
anonymous
  • anonymous
here's a hint for this one: you must use scientific notation for your answer in order to round it correctly
anonymous
  • anonymous
the answer is not 108 because that has 3 SF
anonymous
  • anonymous
omg super confused now :(
anonymous
  • anonymous
the answer has to only have 2?
anonymous
  • anonymous
well you don't have to use scientific notation here i suppose, but you can
anonymous
  • anonymous
correct answer is 110, this has 2 SF
anonymous
  • anonymous
omg i was gonna say that, i really was! but i thought i was gonna be wrong!
anonymous
  • anonymous
good, then you are starting to understand
anonymous
  • anonymous
just a little lol, so last one 0.00043/2.04
anonymous
  • anonymous
0.00043 = 2 2.04= 3
anonymous
  • anonymous
i round the answer to hundredths?
anonymous
  • anonymous
no, what did you get for your answer?
anonymous
  • anonymous
if you round to nearest hundredth, you'd get 0.00
anonymous
  • anonymous
i got 0.0021.....
anonymous
  • anonymous
0.00043/2.04 is about .0002108
anonymous
  • anonymous
and what do i do after? o:
anonymous
  • anonymous
whats the 2nd SF?
anonymous
  • anonymous
one has 2sf & the other has 3sf
anonymous
  • anonymous
but whats the 2nd sf in .0002108
anonymous
  • anonymous
from left to right? or right to left? left to right is 1? right to left is 0 o:
anonymous
  • anonymous
always from left to right
anonymous
  • anonymous
so you round the 1
anonymous
  • anonymous
so .0002108 round the one to the zero?
anonymous
  • anonymous
.00021?
anonymous
  • anonymous
round the 1 using the 0 to round, yes .00021
anonymous
  • anonymous
YAY!!!
anonymous
  • anonymous
thannk you very much!
anonymous
  • anonymous
yw

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