Online exponential growth/decay 计算器.
x(t) = x0 × (1 + r) t
x(t) is the 值 at 时间 t.
x0 is the initial 值 at 时间 t=0.
r is the growth rate when r>0 or decay rate when r<0, in percent.
t is the 时间 in discrete intervals and selected time units.
x0 = 50
r = 4% = 0.04
t = 90 hours
x(t) = x0 × (1 + r) t = 50×(1+0.04)90 = 1706
