To find the average savings per day, divide the total amount saved by the number of days. In this case, the boy saved one dollar over 20 days. Therefore, his average savings is ( \frac{1 \text{ dollar}}{20 \text{ days}} = 0.05 ) dollars per day, or 5 cents.
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The average is about 30.4 days, which provides a closer estimation than using 30 days. Dividing 365 calendar days by 12 gives you 30.4167 days in the average month. Dividing by 365.25 days (Julian year) by 12 is 30.4375 days for an average month.
365¼ days in a year. The average Gregorian calendar year is 365.2425 days. The average actual tropical year is about 365.2422 days. (The average Julian calendar year was 365.25 days.)
10 dollars doubled for every two days for a month
243.5 on average (based on 365.25 days per average year)
Mode average year is 365 days = 8760 hours Median average year is 365.5 days = 8772 hours Mean average year is approximately 365.2425 days = 8765.82 hours