Question

HELPPPP 100 POINTS WORTH

Scientists estimate there are about 7.5 x 10^18 grains of sand on Earth.
They estimate there could be as many as 4 x 10^11 stars in the Milky Way galaxy. How many times as many grains of sand are there on Earth than stars
in the galaxy?
A 1.875
B 1.875 X 10^7
C 7.5 x 10^18
D 1.875 X 10^29

Answer 1

To find the ratio of grains of sand on Earth to stars in the galaxy, we divide the number of grains of sand by the number of stars: (7.5 x 10^18 grains of sand) / (4 x 10^11 stars).

To divide these numbers, we subtract the exponents: (7.5 x 10^18) / (4 x 10^11) = (7.5/4) x (10^18/10^11) = 1.875 x 10^7.

Therefore, there are 1.875 x 10^7 times as many grains of sand on Earth than stars in the galaxy.

The correct answer is B) 1.875 x 10^7.

Answer 2

(B) 1.875 × 10⁷

Explanation:

The number of grains of sand on Earth is
`\sf 7.5 * 10^(18)`, and the number of stars in the Milky Way galaxy is
`\sf 4 * 10^(11)`

And

To find how many times as many grains of sand there are on Earth than stars in the galaxy, we divide the number of grains of sand by the number of stars:

`\sf (7.5 * 10^(18))/( 4 * 10^(11)) = 1.875 * 10^7`

Therefore, there are
`\sf 1.875 * 10^7` times as many grains of sand on Earth than stars in the Milky Way galaxy.

So the answer is (B) 1.875 × 10⁷