A sand dune stands 5 feet above sea level. The hill is eroding at a rate of 1 foot per 20 years. Let y represent the height of t
he sand dune after x years. Which equation represents the situation?
2 answers:
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Problem
Solution
for this case we know that when x =2/3 , y= 6
Then we want to find the value of y= ? when x= 10 1/3 = 31/3 and we can do this:
6/(2/3) = y/(31/3)
And solving for y we got:
y = (3/2) * 6 * (31/3) = 31*3 = 93
C. y= 93
