An internet search engine looks for a keyword in 9 databases, searching them in a random
order. only 5 of these databases contain the given keyword. find the probability that it
will be found in at least 2 of the first 4 searched databases.

One astronomical unit (1 au) is about 1.496 alt tag missing. kilometers. if you wrote this number of kilometers in regular decimal notation (for example, 528 and 3,459 are written in regular decimal notation), how many zeros would your number have?