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Hello guys plz help me with this question, plz show me the working so i know how you did it, THANK YOU!

Hello guys plz help me with this question, plz show me the working so i know how you-example-1
User Hagarwal
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6 votes

9514 1404 393

Answer:

a) 13%

b) 65.9%

Explanation:

a) You can use n=1 to find the percentage remaining at the end of 1 hour:

P = 100(0.87^1) = 87

This is 13% less than 100%, so the decay rate per hour is 13%.

__

b) Fill in n=3 and evaluate the expression.

P = 100(0.87^3) = 65.8503

After 3 hours, about 65.9% of the caffeine remains.

User Capn Jack
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