0.805 mph equals 36 centimeters/seconds
Tan^-1 (tan x) = 42/25
x=tan^-1 42/25
x= 59.237 degrees.
A translation of 4 units down means subtract 4 from the y-coordinate.
A translation of 5 units right means add 5 to the x-coordinate.
The new polygon will have vertices
A'(-1, 1)
B'(-1, -2)
C'(3, -2)
D'(3, 2)
Yes, it is the longest river