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noname [10]
3 years ago
12

Convert the following percent to a fraction and decimal. (THIS IS NOT MULTIPLE CHOICE!!)

Mathematics
2 answers:
Andrews [41]3 years ago
7 0

Answer:  A   9/10 or 0.9

               B    0.9 = 9/10 or 90%

               C    0.9 or 900/1000

               D    0.9 or 90%

   

Step-by-step explanation:

Mkey [24]3 years ago
6 0

Answer:

90%=9/10=0.9

0.9=90%=9/10

900%=900/1000=0.9

9/10%=0.9=90%

Step-by-step explanation:

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Step-by-step explanation:

We very well know that,

cos2A=1−2sin²A

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As required,  set A = \frac{a}{2}   &   cos a=  \frac{12}{13}    ,thus we get

sin \frac{a}{2} =± \sqrt{\frac{1-cos a}{2} }  

∴ sin\frac{a}{2} =±\sqrt{\frac{1-\frac{12}{13} }{2} } = ± \frac{1}{\sqrt{26} }

   since ,360° < \frac{a}{2} <450°

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Now, we are to select the value with the correct sign. It's is obvious from the above constraints that the angle a/2 lies in the III-quadrant where 'sine' has negative value, thus the required value is negative.

hope it helped!

   

5 0
3 years ago
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Lostsunrise [7]

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