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Help#3

NotSoSmart  Mar 12, 2018
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3.  We have that

 

18 * [  r ]^2  = 8          divide both sides by 18 

 

 r^2  =  8/18  = 4/9

 

r^2  = 4/9

 

r = √[ 4/ 9]   = 2/3

 

So

 

The length of the second arc is

 

18 (2/3)  =  12 ft

 

 

4.  ​A little tricky, NSS

 

We have that

 

1250 * r^2  = 50     divide both sides by 1250

r^2  =  50/1250  = 1/25

r = √(1/25)  = 1/5

 

So.....the second term is

 

1250 (1/5)  =   250

 

 

 

cool cool cool

CPhill  Mar 12, 2018

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