Algebra

How do I answer this question/problem? I can't input the following scientific notations in a calculator and would like to know how to solve it. Thank you tutors.

The four other recognized dwarf planets in the solar system and their estimated masses in kilograms (kg) are:
Haumea: 4.006 x 10 to the power of 21 kg Ceres: 9.39 x 10 to the power of 20 kg
Eris: 1.67 x 10 to the power of 22 kg
Makemake: 3.0 x 10 to the power of 21 kg

Pluto's mass is 1.305 x 10 to the power of 22 kg. Order these five dwarf planets from most massive to least massive.

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  1. express all as the same power of 10. Then it will be easy to sort them.

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