Answer:

Step-by-step explanation:
At the start of the day there are g pounds of gravel in the quarry.
Then it says that there were 300 pounds added to the mound, so at this point the pounds of gravel in the mound are now g+300.
Then two orders of 700 pounds are sold and removed from the mound. That means they removed 700 pounds from the mound 2 times. Therefore at this point the pounds of gravel in the mound are now g+300-700-700.
Then it says that at this point, the amount of pounds in the mound are 1500. Hence we get

To solve for g we just add 700 two times to both sides of the equation, and subtract 300 from both sides of the equation, getting:

And so 
The correct option will be : 14 years
<u><em>Explanation</em></u>
Current account balance of Susan is $1,336.60 and her initial deposit was $820
So, the amount of interest earned
dollar
Formula for Simple Interest is:
, where
is the amount of interest,
is the initial amount,
is the rate of interest in decimal and
is the time duration in years.
Here,
% 
Now according to the above formula, we will get...

So, Susan has held the account for 14 years.
Answer:
462 cu. in
Step-by-step explanation:
See attached formula