Question

a certain mountain has an elevation of 19,380 feet. In 1923 the glacier on the peak covered 10 acres. By 2003 the glacier had melted to only 1 acre
(a) assume that this glacier melted at a constant rate each year. Find the yearly rate
(b) use your answer from part(a) to write a linear equation that gives the acreage A of this glacier t years past 1923.

the yearly rate of change is ? acres/years
what is the equation that gives the acreage of the glacier t years after 1923?
A=?

Answer 1

So the time passed is 80 yrs right?
And the amount of ice melted = 9 acres of ice [HECK THAT'S A LOT]
So rate is anything by TIME!!
So the constant rate of melting = 9/80!
Getting me? :)
It is just like speed is rate of dstance = d/t
So Ice melting rate = amt. of ice melting/years = 9/80!

Answer 2

@AkashdeepDeb i came up with o.11 but im stuck after that

Answer 3

So now it is kinda like distance is average
Then time is TIME :P
And the rate 0.11 is the speed?
So what is distance? --> speed/time right?
So A = 9/80/t = 9/80t :)
Getting me?
So that would mean that after 1 year the amount of ice that would have meleted would be?
9/80 itself!
Getting me? :D

Answer 4

no im totally lost @AkashdeepDeb

Answer 5

Okay 9/80 means that in 80 years 9 acres were lost!

Answer 6

MY BAD I AM SRY!
DISTANCE = SPEED * TIME!!
Haha...silly me!
So Average = 9t/80!!!

Answer 7

i get that much @AkashdeepDeb but i cant the (b) part of the problem

Answer 8

See b)actually tells us to
Find a GENERAL form!
We know that in 80 years --> 9 acres are lost and in 1 year 9/80 acres are lost!
Did you get till this much!?

Answer 9

yes @AkashdeepDeb

Answer 10

Okay so do you know that
distance is given by speed * time!
RIGHT?

Answer 11

what is the equation that gives the acreage of the glacier t years after 1923?
A=?

Answer 12

o.11 right

Answer 13

So this is KINDA ike that!
They want us to finnd the average!!
A = rate * time
= 9/80 * T years
so
A = 9*T/80!! :D

Answer 14

its a 2 answer problem

Answer 15

@AkashdeepDeb

Answer 16

I get it!
And the average = 9t/80 tht is the equation right????

Answer 17

ok i understand now lol sry bout tht

Answer 18

right @AkashdeepDeb

Answer 19

yes @AkashdeepDeb

Answer 20

Did you get the concept right?

Answer 21

is it 0.01 @AkashdeepDeb

Answer 22

It is an equation!
what is 0.01 ?? :P

Answer 23

what i done was 9 *o.11 then divided that by 80

Answer 24

@AkashdeepDeb

Answer 25

T is a VARIABLE that means it varies always
T can be 1000 , 100 , 1 , 90 etc etc.
So finally you CAN right it as
A = 0.11*T
Got it my friend? :)

Answer 26

yes