Answer: There are 90 four-digit palindromes from 1001-9999.
In order to begin figuring that out, we need to know how both of their plans work.
26,300 = 1/2x + 3200......with x being last years population
Well we know that sin(angle) = opposite/hypotenuse. using the angle of 38 degrees we see that the opposite is 24 and the hypotenuse is x. So we fill in equation:
sin (38) = 24/x
x *sin (38) = 24
x = 24/ sin (38)
x = 38.98
x = 39.0