On OP's request I am converting my comment into an answer. The limit in question is easily solved if one rewrites the given expression as
And then the limit is easily seen to be
Other limits in your question (after the fold) don't have any problem as we can just plug x=0 to evaluate them (the functions concerned are continuous at 0).
Which operation could we perform in order to find the number of milliseconds in a year??
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Is a prime number?
What is the square root of ?
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149600000000 is equal to
Find the value of to the base ?
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write as an equivalent expression using a fractional exponent.
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