The half-life of 
is 30 years.Suppose we have a 
sample.Find the mass that remains after years. 
Correct Answer:
Verified
Q77: Select the correct Answer for each question.
-Find
Q78: Select the correct Answer for each question.
-Differentiate:
Q79: Select the correct Answer for each question.
-A
Q80: Select the correct Answer for each question.
-Calculate
Q81: Find Q83: Find the derivative of the function. Q84: Find the second derivative of the function. Q85: Find the derivative of the function. Q86: Find the second derivative of the function. Q87: Calculate 
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