"Pluto was the first dwarf planet to be discovered" is the one statement among the following choices given in the question that is true <span>about dwarf planets. The correct option among all the options that are given in the question is the first option or option "a". Pluto was classified as a planet at first but in the year 1930 it was classified as a dwarf planet.</span>
<span>The work output of a machine divided by the work input is the "Efficiency" of the machine.
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2e min :)) pls park braliest
D. diamond, is the best option..
15) a
16) b
17) a
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