Did you mean: resolver ejercicio de matematicas:el interior de un parque es un cuadrado cuya area es de 8,100 pies cuadrados. se reparará con grama nueva el area triangular sombreada entre la primera y la tercera base. ¿ cual es el area en pies cuadrados que se reparara?

Step-by-step explanation:

The question in English is

The interior of a park is a square whose area is 8,100 square feet. The shaded triangular area between the first and third base will be repaired with new grass.  

what is the area in square feet that will be repaired?

The picture of the question in the attached figure

we know that

The diagonal in a square divide the square into two congruent right triangles

so

The shaded triangular area is equal to divide the area of the square by 2

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.