Posted by **carly** on Sunday, September 30, 2012 at 8:15pm.

A female moth lays nearly 150 eggs. In on year there may live up to five generations. Each larva eats about 20mg of wool. Assume that 2/3 of the eggs die and that 50% of the remaining moths are females. Estimate the amount of wool that may be destroyed b the descendants of one female within a year. (The first female belongs to the first generation)

- Math.. please helpp! -
**Steve**, Monday, October 1, 2012 at 12:12am
assume that each female produces n live children, of whom f are females.

Then generation 1 has 1 female

(no idea whether there are any males in generaton 1. presumably at least 1, but hey...)

generation 2 has 1 + n

of whom f are females

generation 3 has the original 1 pus her n kids, plus offspring

1+n + f(1+n) = (1+n)(1+f)

and so on

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