Mt eveverst the highest elevation is 29,028 above sea level the dead sea, the lowest elevation is 1,312 Feet below sea level, what is the difference between these two elevation

The term "difference" is used for subtraction but im this case the difference between these two numbers would be 30,340 since 29,028 is above sea level and 1,312 is below sea level you would add the 2 numbers

The difference between the two is just taking 29,028 minus 1,312 becauase in math "difference" means to subtract something from another. Your answer will be 27,716 feet.