HELP! Look at the attached image please :)

Atemperature of 1.64◦f corresponds to answer in units of ◦c.

Which of the following is not a subset of {1,2,3}?

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?