Our teacher told us a story about a pony express rider which is the object of the preposition of this sentence

Our teacher told us a story about a pony express rider.

The object of the preposition of the above sentence is 'pony express rider'.

The preposition is 'about'.

Explanation:

A preposition is a part of speech which tells about the relation between the noun or pronoun with another part of the sentence. In the above sentence the preposition 'about' tells about the relation between 'story' and 'pony express rider'.

for this case, we must find the number of deaths per day of the year 2015, in automobile accidents, knowing that 32,400 people died.

knowing that the year 2015 had 365 days we have the following division:

where "x" represents the number of deaths per day.

rounding off we have:

approximately, 89 people per day died in 2015

answer:

89 people per day