we are given

we know that
whenever nothing is given in base
we will assume base =10

so, we can solve for x
we can take exponent 10 on both sides

now, log will be cancelled with 10
we get

..............Answer
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Answer: 275d>1650
Step-by-step explanation:
because the question ask you a distance at least 1650 which means 275 times the days has to be greater than 1650.
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I just did the first one but I don't know is it correct