please help me on this

Question

When downloading a large file, Travis noticed that the estimated time remaining to complete the download decreased by 40 seconds for each additional megabyte downloaded. When he started the download there were 110 seconds remaining.

a. Determine the constant rate of change, k, of the number of seconds remaining to complete the download with respect to the number of megabytes downloaded.




b. Write a formula to determine the change in the number of seconds remaining to complete the download, Δt, in terms of the change in the number of megabytes downloaded, Δm.




c. Write a formula to determine the number of seconds remaining to complete the download, t, in terms of the number of megabytes downloaded, m.

Answer 1

Hi Zeze,

 

(a) The constant rate of change that Travis observed is 

 k=-40sec/Mb                  Mb=megabytes

(b) The change in number of seconds remaining to complete the download with respect to number of change will be

 Δt = kΔm

(c)  t = 110 - 40m