Plsssssssssss help, so sorry for the trouble

Question

Link to image of the problem  

Answer 1

Here is a link to the Desmos graph used in the video:

desmos.com/calculator/gdcrk8nzer

Here is the link to the Desmos graph using Newton's method to determine the x-coordinates of the points of intersection for highway and river functions.

desmos.com/calculator/6y3jmnotgn

Set x_0 to 0.4 for 1st x-coordinate, to 3.5 for 2nd.