The planet Mars has two moons – Phobos and Deimos. Phobos has a mass of 10.8 × 1015 kilograms, and Deimos has a mass of 2.0 × 10

Question

3 years ago

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The planet Mars has two moons – Phobos and Deimos. Phobos has a mass of 10.8 × 1015 kilograms, and Deimos has a mass of 2.0 × 10

15 kilograms. How much greater is the mass of Phobos than the mass of Deimos?
A) 8.8 × 1015 kilograms
B) 8.8 × 1016 kilograms
C) 9.2 × 1014 kilograms
Eliminate
D) 9.2 × 1015 kilograms

Mathematics

1 answer:

OleMash [197] · Answer 1 · 2022-09-05T00:30:07+03:00

A) 8.8 × 10^15 kilograms is the right answer

Step-by-step explanation:

Given

Mass of Phobos = $10.8 * 10^{15}\ kg$

Mass of Deimos = $2.0 * 10^{15}\ kg$

In order to find how greater is the mass of Phobos from Deimos, the smaller mass will be subtracted from the larger mass

So,

$= 10.8*10^{15} - (2.0*10^{15})$

As the exponents are same, the numbers can be subtracted directly

$=(10.8-2.0) * 10^{15}\\= 8.8*10^{15}\ kg$

Hence,

A) 8.8 × 10^15 kilograms is the right answer

Keywords: Exponents, Addition

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