Answer:
The difference in elevation is 7,716 ft
Step-by-step explanation:
Let
y -----> the elevation of Mt Owens
x -----> the elevation of the bolo cavern
we know that
To find the difference in elevation between the bolo cavern and Mt Owens, subtract the elevation of the bolo cavern from the elevation of Mt Owens
we have
y=7,295 ft ----> is positive because is above sea level
x=-421 ft ----> is negative because is below sea level
therefore
y-x=7,295-(-421)=7,295+421=7,716 ft