Unit Review Day Challenge Last month, Simon's neighbors paid him to take care of their fish when they went on
vacation. He spent $3 of his earnings on an afternoon snack and $13 on a new book. Afterward,
he had no less than $7 left. How can you best describe how much Simon's neighbors paid him?

Día de revisión de la unidad

Desafío El mes pasado, los vecinos de Simon le pagaron para que se ocupara de sus peces cuando

vacaciones. Gastó $ 3 de sus ganancias en una merienda y $ 13 en un libro nuevo. Después,

no le quedaban menos de $ 7. ¿Cuál es la mejor manera de describir cuánto le pagaron los vecinos de Simón?

Step-by-step explanation:

20 $

Step-by-step explanation:

DO THE MATH

and i am bord

:P

b. astronomers

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.