A certain mountain has elevation of 19,291 feet. in 1918, the glacier on this peak covered 9 acres. By 2001, this glacier had melted to only 1 acre. Assume that this glacier melted at a constant rate each year. Find this yearly rate.

Question

A certain mountain has elevation of 19,291 feet.  in 1918, the glacier on this peak covered 9 acres.  By 2001, this glacier had melted to only 1 acre. Assume that this glacier melted at a constant rate each year.  Find this yearly rate.

anonymous · Answer

About .09 acres per year.

anonymous · Answer

but how did you solve

anonymous · Answer

First subtract 1918 from 2001 to find the years, which is 83, divide 8 acres by 83 to find 0.09 acres per year. Understood?

anonymous · Answer

the next part of the question is Use your answer to write a linear equation that gives the acreage A of this glacier t years past 1918. A=

anonymous · Answer

Um I think it would be y=9-(.09x), where y is ice area and x=years

anonymous · Answer

If I divide 89 into 9 it does not equal .09

barrycarter · Answer

Decrease of 8 acres over 83 years = 0.0963855 acres/year, assuming linearity.