Age distribution averaged over the indicated interval of mass for the Antennae clusters (data points) and for Model 2 with k = 0 (lines). In this model, clusters have a power-law initial mass function, a constant formation rate, and gradual mass-dependent disruption. The solid lines were computed from Equations (B5) and (B11) with the indicated values of τ _*. The dashed line here corresponds to the dashed line in Figure 8 (both with τ _* = 1.4 × 10 ⁷ yr).