On Saturday mornings, Zoe volunteers at the hospital where her mother works. One Saturday, she answers phone calls at the information desk while the receptionist is away.
Then she spends 20 minutes delivering flowers to patients' rooms. In all, Zoe volunteers at
the hospital for 60 minutes that day.

Step-by-step explanation:

312x2=624

54-15=39

624/39=16

it will take 16 years

the people times 2 is the amount of people if doubled, or the amount to reach.

the average babies born minus the deaths will make the amount of live babies.

the goal of population divided by the average babies born a year makes the years until the population doubles. plz give me brainliest i need it to level up.