Answer:

Step-by-step explanation:
Given
--- Initial Amount
every 10 years
Required
The remaining amount after 300 years
To do this, we make use of:

Where
r = decay rate
T = the period of decay
In 300 years, there are 30 periods of 10 years.
i.e.






Answer:
The answer is
<h2>135°</h2>
Step-by-step explanation:
In order to convert a value from radians to degrees we multiply the value by 
So from the question the value to be converted into degrees is
<h3>

</h3>
<u>Converting into degrees we have</u>
<h3>

</h3>
<u>Reduce the expression with π</u>
That's
<h3>

</h3>
We have the final answer as
<h3>135°</h3>
Hope this helps you
Answer: the final mass of the solid is 176 grams.
Step-by-step explanation:
The "change" between two quantities, one initial Qi and one final Qf is defined as:
Change = Qf - Qi.
In this case, the quantity is mass, and we know that the initial mass is 260 grams.
And we also know that the change is -84 grams.
Then we have the equation:
Qf - 260 g = -84g
Qf = -84g + 260g = 176g
So the final mass of the solid is 176 grams.