Peterson projects that by the 2030s, percent of the adult population of the nation's industrialized countries will have approached the eligibility age for publicly financed retirement.

answer; /// i believe that the correct answer is (50%);

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

the scientific method.