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#4 Help.

NotSoSmart  Feb 13, 2018
 #1
avatar+87556 
+2

4)

 

Here's the equation we need :

 

r = ks / t

 

And when r = 2, s = 3

 

So .......  we need to find k

 

2  = k* 3 / 12        

 

2 = (1/4) k      multiply both sides by 4

 

8  = k

 

So

 

r  =  8 (5) / 4

 

r  =  40 / 4

 

r = 10

 

 

cool cool cool

CPhill  Feb 13, 2018
 #2
avatar+87556 
+2

5)   Here's what we need

 

N =  k * A / P

 

The second sentence translates to :

 

1800  = k * 34000 / 25         multiply both sides by 25 / 34000

 

25 * 1800 / 34000  =  k  =  45/34

 

So we have

 

N  =  (45/34) * 42000 / 25     =    2224  dolls

 

 

cool cool cool

CPhill  Feb 13, 2018

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