Answer:

Step-by-step explanation:
(triangle)
(semicircle)
Add both together

I believe the radius would be 3.39
Hope this helps! Good luck! :)
Just use the distributing property and combine like terms. There isn’t a definite answer since it is an expression.
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Given:
The initial mass of an element is 800 grams.
Decay rate = 8.2% per day
Number of days = 15
To find:
The remaining element after 15 days.
Solution:
The exponential decay model is

Where, a is the initial value r is the rate of interest and t is time period.
Putting
in the above formula, we get




Therefore, the mass of the remaining element is 221.7 grams.