Portland population in 2007 was about 258 thousand and has been growing by about 1.1% each year,, write a recursive formula for the population of portland

To find the extreme values of a function f(x.y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x,y)=xy

What is the result of adding the system of equations? 2x+y=4 3x-y=6

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25