- 3 x 4 x - 6 = 72. That is your answer
Answer:
Step-by-step explanation:
In this problem we have a exponential function of the form
where
f(x) is the remaining mass of the element in grams
x is the time in minutes
a is the initial value (y-intercept of the exponential function)
b is the base
r is the rate
In this problem we have
---> is negative because is a decay's rate
substitute
The exponential function is equal to
For x=15 minutes
substitute in the function
21 8/9 because you need to make both fractions have a common denominator so you multiply the top and bottom of 1/3 by three to get 3/9 and then you add to get 21 8/9
Answer:c
Step-by-step explanation:
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