what was the population of the world in 1500 in billions if it is 0.5

To calculate the population of the world in 1500 in billions, we need to multiply the given population (0.5) by one billion.

To do this, you can use the following formula:

Population in billions = Given population * One billion

Substituting the values, we have:
Population in billions = 0.5 * 1 billion

Multiplying 0.5 by 1 billion gives us 500 million. Therefore, the population of the world in 1500 would be 500 million.