Answer :

It would take Miss Bird 9 months to make 12 sculptures.
luana
[tex]8\ sculpture\ in\ 6\ months\\ 12\ sculpture\ in\ x\ months\\\\ Making\ proportion:\\ 8-16\\ 12-x\\\\Cross\ multiplication:\\ 8x=16*12\\ 192=8x\ \ |:8\\\\ x=24\\\\ He\ will\ do\ 12\ sculptures\ in\ 24\ months.[/tex]