Any help with the syntax of this function, I keep getting errors?

t = 20:20:100
N = 220 / (1 + 10 * (0.83 ^ (x)));
plot(t, N)

Answer 1

[Walter Roberson]

t = linspace(20,100);
N = 220 ./ (1 + 10 * (0.83 .^ (t)));
plot(t, N)