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Algebra 17 Online
OpenStudy (anonymous):

Phobos has a mass of 10.8 × 1015 kilograms, and Deimos has a mass of 2.0 × 1015 kilograms. How much greater is the mass of Phobos than the mass of Deimos?

OpenStudy (tennis5518):

WELCOME TO OPENSTUDY

OpenStudy (skullpatrol):

Any ideas? :-)

OpenStudy (skullpatrol):

$$\huge 10.8 X 10^{15} - 2.0 X 10^{15}$$

OpenStudy (skullpatrol):

Recall the distrutive property $$\Huge ba - ca = ( b - c )a$$

OpenStudy (skullpatrol):

Replace a with 10^15 :-)

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