The signal from a certain satellite takes approximately 0.0078 seconds to reach Earth. Write this number in scientific notation. The total surface area of Africa is approximately ×1.17107 square miles. Write this number in standard notation.

Seconds:

Square miles:

7.8 x 10^(-3)

Step-by-step explanation:

Move the decimal so there in one non-zero digit to the left of the decimal point. The number of times the decimal point is moved will be the exponent to 10. If the decimal is being moved the right then the exponent will be negative. if the decimal is being moved to the left the exponent will be positive. Therefore, since 0.0078 is converted to 7.8 the decimal point was moved the right three times making the exponent -3.

no problobm

step-by-step explanation:

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.