Question

This is a hard 1 for ya'...Is a 2 part question: A certain mountain has an elevation of 19,649 ft. In 1915, the glacier on this peak covered 4 acres. By 2000 this glacier had melted to only 1 acre. A)Assuming that the glacier melted at a constant rate each year, PLEASE find the yearly rate!
B)Use the answer from part A to write a linear equation that gives acreage A of this glacier t years past 1915.

I need to know:
* the yearly rate of change is _______acres/year
*What is the acreage of the glacier t years after 1915? A = ______________

Answer 1

1) Rate of melting = (Change of Acre) / (Change of Time)
Change of Acre = Final Acre - Initial Acre = 1 - 4 = -3
Change of Time = Final Time - Initial Time = 2000 - 1915 + 1 = 86
* Take note that there are 86 years has passed *

Rate of melting = -3 / 86 = ? acre per year

2) Amount of acre melted = Rate of melting + Number of year passed since 1915
Amount of acre melted = (-3/86) x (t)
Amount of acre remaining = 4 - Amount of acre melted

@bjhutchq

Answer 2

I am so very confused...so what is the yearly rate of change _________acres/year?

Answer 3

Rate of melting = -3 / 86 = ? acre per year

That is the yearly rate of change

Answer 4

ok, I am lost when I try to read the text on this example...1 more question PLEASE: what is the acreage of the glacier t years after 1915? A = _______

Answer 5

Amount of acre remaining = 4 - Amount of acre melted
I do not understand this line here...I am looking for A = ___________

Answer 6

Amount of acre melted = Rate of melting + Number of year passed since 1915
Amount of acre melted = (-3/86) x (t)
Amount of acre remaining = 4 - Amount of acre melted = A