Multiply 21•21.2 and then 437956-445 and you get 43,351
No solution because they have the same slope.
Elevation per minute
elevationchange=-8212
timechange=214
elevation per minute=-8212/214=
-8132/214-80/214=
-38-40/107=
-38 and 40/107
answer is -38 and 40/107 ft per minute