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Hi everyone, could someone help me to resolve this ? 

 

The pollution level in the center of a city at 6am is 30 parts per million and it grows linearly by 25 parts per million every hour. If P(t) is the pollution level in part per million and t is the time elapsed after 6 am in hours, determine : 

 

1. The function that relate P(t) with t ? 

2. The pollution level at 4pm ? 

 

 

Thank you so much ! 

 

Thalys 

 
Thalys  Nov 2, 2015

Best Answer 

 #1
avatar+78620 
+10

(1)  P(t)   = 25t + 30

 

(2) At 4PM....this is 10 hours after 6AM.....so

 

P(10)  = 25(10) + 30  =    280 PPM

 

 

 

cool cool cool

CPhill  Nov 2, 2015
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2+0 Answers

 #1
avatar+78620 
+10
Best Answer

(1)  P(t)   = 25t + 30

 

(2) At 4PM....this is 10 hours after 6AM.....so

 

P(10)  = 25(10) + 30  =    280 PPM

 

 

 

cool cool cool

CPhill  Nov 2, 2015
 #2
avatar+191 
0

Thank you ! :D 

 
Thalys  Nov 2, 2015

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