A dozen is 12 and you have 5 dozen oranges, so 5 x 12 is 60 oranges and 8 oranges costs
$1.00 so 60/8 is 7.5, that means that 5 dozen oranges aka 60 oranges will cost $7.50
I believe the correct answer is, “Oscar Leroux, the last man to live in the Hughes estate, was a French businessman.”
Answer:

Explanation:
Joe, the coach, is sick.
Appositive Comma: A comma that is placed when a noun is right next to another descriptive noun.
<u><em>Joe</em></u> is the noun. He is the person, out of the person, place, thing and idea.
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<u><em>The coach </em></u>is also a noun that is describing the coach.
The comma has been placed to separate the two nouns. The coach helps describe Joe.
Answer: The astronomy club chose to place the telescope on the tripod.