in 1970, the elevation of the dead sea between Jordan and Israel was -1296 feet above sea level. since then, the elevation dropped about 2 1/2 feet each year. How many years, y, did it take for dead sea to reach an elevation of -1371 feet above sea level?( show the equation you used to solve)

Guest May 18, 2017

#1**+1 **

Here's the equation we need :

y = -1296 - 2.5x where x is the number of years after 1970 and y is the elevation at any point in time

To find out how many years it took to reach an elevation of - 1371 feet, we have

-1371 = - 1296 - 2.5x add 1296 to both sides

-75 = - 2.5x divide both sides by -2.5

30 = x i.e., 30 years after 1970 = 2000

CPhill
May 18, 2017