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A Cepheid star in another galaxy is observed to pulsate with a period of 3 days....

A Cepheid star in another galaxy is observed to pulsate with a period of 3 days. The star is 100,000 times fainter than a solar-mass star 1 kpc away in the Milky Way. Calculate the distance to the galaxy.

A. 1 pc

B. 100 pc

C. 10 kpc

D. 3.3 Mpc

E. 10 Mpc

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