Mathematics, 12.09.2021 16:00 melodyl3on

Pls helpp The oort cloud is a spherical shell encircling the solar susten that is thought to contain many billions of cometary objects. it's inner boundry is 7.5 x 10^11 kilometers from earth. If a satellite were sent to the Oort Cloud on a straight line at an average speed of 52,900 kilometers per hour, approximately how many years would it take the satellite to reach the inner boundary of the cloud?
a) 647
b) 1620
c) 9850
d) 38800

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Pls helpp The oort cloud is a spherical shell encircling the solar susten that is thought to conta...