SOLUTION: A cup of coffee is split on a carpet.it makes a stain that is 200cm^2 in atea. The stain contuinues to grow in size. In the first minute, the area of the stain grows by 40cm^2. In
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Question 1058608: A cup of coffee is split on a carpet.it makes a stain that is 200cm^2 in atea. The stain contuinues to grow in size. In the first minute, the area of the stain grows by 40cm^2. In successive minutes it grows by 20 percent of the previous minute's growth. What is the final area of the stain? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! The growth is the first amount divided by (1-r), where r is 0.20
The first minute is 40, the second is 8, the third is 1.6 and the final is 40/0.8=50 cm^2 of total growth.
This can be done with the first value of 200 and divide that by 1-r; 200/0.8=250 cm^2 of final area.
