#Word problem

37 messages · Page 1 of 1 (latest)

pseudo wyvern
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Emma says the length of her favourite movie is 129 minutes, but she has rounded the time to two significant figures. Which could be the number of minutes of Emma's favourite movie before she rounded it?

111.25
115.95
124.9
133.2

zinc idolBOT
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gloomy willow
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129 is 3 significant figures

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are you sure the question is correct?

pseudo wyvern
# gloomy willow Um

yes, 129 is what it is after rounding off, or at least close to it It would naturally be 3 significant figures

gloomy willow
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Emma says the length of her favourite movie is 129 minutes, but she has rounded the time to two significant figures. Which could be the number of minutes of Emma's favourite movie before she rounded it?

111.25
115.95
124.9
133.2

pseudo wyvern
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It should be three significant figures

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@gloomy willow Do you know the answer?

gloomy willow
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None of those are right tbh

pseudo wyvern
pseudo wyvern
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All of them will still end up with 3 digits though because of the decimal regardless

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@gloomy willow With that information, do you have the answer now?

gloomy willow
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No

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That makes the question even worse

pseudo wyvern
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Can you say how? @gloomy willow

gloomy willow
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I already said my complaints.

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  1. 129 is 2 sf, not 3
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  1. None of those round to 129
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Unless it wants you to round 129 to 2 sf then see which option rounds to the same result

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Which is the only thing I can assume

pseudo wyvern
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It said closest.... not the exact value. Also they all have a decimal so it'll still be 3 sig figs

gloomy willow
gloomy willow
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111.25 and 115.95 are 5 sf

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124.9 and 133.2 are 4 sf

pseudo wyvern
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Indeed

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And it said to round to 2 sig fig...

gloomy willow
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Cool

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Are you having trouble with the rounding?

pseudo wyvern
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no, I'm just wondering which one is the closest. I'm guessing it would be 124.9

gloomy willow
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Yeah that's the closest to 124.9, just note it's not the correct answer to the given question.

pseudo wyvern
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Yes, I know we can't get 129 specifically

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@gloomy willow Thank you, +1 rep nerd1 ☝️