Need help pls!!! (19 questions/parts related to polygons, circles, etc)

Sorry about that ill try to upload a clearer image

I think the answer to number 1 is 63.0 or 60 if rounded to the nearest tenth, and i think number 2 is. 96.0 or 100 if rounded to the nearest tenth. Need help with 3 and 4. I think for 3 i would add 6 and 8 as the diagonal going down and the vertical diagonal would be 5 . 6+8=14 so the area would =35(rounded to nearest tenth would be 40) am i correct? Number 4 is where i get completely lost.
 

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topsquark said:
I rarely help someone who can't even be bothered to spend the time to orient their images correctly.

-Dan
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I uploaded some answers and the photos are automatically set to be uploaded in landscape orientation. I dunno know why ...
 
Etrujillo said:
I think the answer to number 1 is 63.0 or 60 if rounded to the nearest tenth, and i think number 2 is 96.0 or 100 if rounded to the nearest tenth.
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"Thinking" is not solving. HOW did you arrive at 63 and 96?
 
Etrujillo said:
I think the answer to number 1 is 63.0 or 60 if rounded to the nearest tenth, and i think number 2 is. 96.0 or 100 if rounded to the nearest tenth. Need help with 3 and 4. I think for 3 i would add 6 and 8 as the diagonal going down and the vertical diagonal would be 5 . 6+8=14 so the area would =35(rounded to nearest tenth would be 40) am i correct? Number 4 is where i get completely lost.
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No, you are rounding to the nearest ten, not the nearest tenth. The tenth position is one place to the right of the decimal pace.
 
Etrujillo said:
1. 6*10 + (1/2)1*6= 63.0 m²
2. 8*12= 96.0 in²
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you won't need to round them off since the answers are exactly whole numbers, no decimals, no remainders. You only round off if it exceeds the tenths place (and round it off to the nearest tenths like 78.58 is 78.6)
 
jtayag0622 said:
you won't need to round them off since the answers are exactly whole numbers, no decimals, no remainders. You only round off if it exceeds the tenths place (and round it off to the nearest tenths like 78.58 is 78.6)
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No, not true. Sorry. 63.0 means that actual number was rounded off to the nearest tenth, ie the answer is between 62.95 and up to but not including 63.05. Now 63. means the actual number was rounded off to the nearest integer and is between 62.5 and up to but not including 63.5
 
Jomo said:
No, not true. Sorry. 63.0 means that actual number was rounded off to the nearest tenth, ie the answer is between 62.95 and up to but not including 63.05. Now 63. means the actual number was rounded off to the nearest integer and is between 62.5 and up to but not including 63.5
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that's true. That's significant digits, I think and I d o understand the concept and the rules. But I don't see the necessity to show 63.0 or something. what I meant is since the given dimensions in number 1 and 2 yield an exact answer, you won't need to round it off anymore. Well if I was the teacher, I wouldn't mind it for nos. 1 and 2. I know 63.0 is very different from 63, especially when we do calculations in chemistry. but does that mean I still need to do that for nos. 1 and 2?
 
jtayag0622 said:
that's true. That's significant digits, I think and I d o understand the concept and the rules. But I don't see the necessity to show 63.0 or something. what I meant is since the given dimensions in number 1 and 2 yield an exact answer, you won't need to round it off anymore. Well if I was the teacher, I wouldn't mind it for nos. 1 and 2. I know 63.0 is very different from 63, especially when we do calculations in chemistry. but does that mean I still need to do that for nos. 1 and 2?
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The answer is simple, if you are asked to round off to the tenth place, then you need to round off to the tenth place. 63 does not make it, but 6.0 does.
 
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