Question $23$

$4$ pts

It is estimated that by $2050$ the population of the earth will stabilize at around

$4\mathrm{.}2$ billion.

$5\mathrm{.}7$ billion.

$9\mathrm{.}8$ billion.

$15\mathrm{.}4$ billion.

$18\mathrm{.}9$ billion.

Question $24$

$4$ pts