1. The population of the city A is 10^-4 million, and the population of City B is 10^3 million. How many times more is the population of City A then the City B?

2. A grain of rice has a volume 10^-9 m^3. A box is full of rice and has a volume of 10^-3 m^3. How many grains of rice are there in the box?

thankss

both questions are divisions,

1.
Your first question's data makes no sense.
10^-4 million = 1/10^4 million = 1000
The population of the city B
= 1000 million
= 1 Billion

No city has a population of 1 Billion !!!!

2. number of grains of rice
= 10^-3 / 10^-9
= 10^6 or 1 million grains of rice

10^-4 million = 10^-4 * 10^6 = 100

1. To compare the population of City A to the population of City B, we need to calculate the ratio between the two populations.

The population of City A is 10^-4 million, which can be written as 10^-4 * 10^6 (since 1 million is 10^6). This simplifies to 10^2.

The population of City B is 10^3 million, which is already in standard form.

To find the ratio between the populations, we divide the population of City A by the population of City B:

Ratio = Population of City A / Population of City B
= 10^2 / 10^3
= 1/10^1
= 1/10
= 0.1

Therefore, the population of City A is 0.1 times the population of City B. In other words, the population of City B is 10 times greater than the population of City A.

2. To determine the number of grains of rice in the box, we need to divide the volume of the box by the volume of a single grain of rice.

The volume of the box is given as 10^-3 m^3, and the volume of a grain of rice is given as 10^-9 m^3.

To find the number of grains of rice, we divide the volume of the box by the volume of a single grain:

Number of grains = Volume of box / Volume of a grain of rice
= (10^-3 m^3) / (10^-9 m^3)
= (10^-3 / 10^-9)
= 10^6

Therefore, there are 10^6 (1 million) grains of rice in the box.