The total runners who began the marathon is 1000
<u>Explanation:</u>
Given:
Runners who completed the marathon = 90%
Men = 30%
Number of men completed the marathon = 270
Total runners who began the marathon = ?
Let the total runners be x
According to question:
Runners who completed the marathon = 
= 0.9x
and,

Solving further:

Therefore, total runners who began the marathon is 1000
The short paragraph containing all the four types of sentences is given below:
1. I love cookies. [Simple sentence].
2. My mother is an expert at making mouth watering cookies and she will be baking cake next Friday. [Compound sentence].
3. Although the baking process can be very stressful, mother usually enjoys the whole process. [complex sentence].
4. I decided to start bringing my friends home anytime mother bakes, but my mother, who like to spend time with family members alone thought that it is not necessary. [Compound-complex sentence].
SIMPLE SENTENCE: A simple sentence is one which is made up of only one independent clause; it has a single subject and a verb. A simple sentence can stand alone.
COMPOUND SENTENCE: A compound sentence is a sentence that has two or more independent clauses which are joined together by a coordinator such as for, and, but, etc.
Note that an independent clause is a sentence that can stand alone because it contains a subject, an action and a complete thought. A dependent clause refers to a sentence that can not stand on its own, that is, it does not express a complete thought.
COMPLEX SENTENCE: Is a sentence that combines one independent clause with at least one dependent clause.
COMPOUND COMPLEX SENTENCE: This is a type of sentence that is made up of two independent clauses and one or more dependent clauses.
coins/dollars
toys
N/A
tall
dresser/crate crate maybe not for sure
1,000,000 i think
colt
still
hope this helps plz make me brainliest