While you may feel the benefits of the food you eat fairly quickly, benefits from exercise take a little bit longer. According to Pete Pfitzinger, an exercise physiologist and two-time Olympic marathoner, it can take about eight to 10 days after a workout for you to see results. Of course, this number varies and depends on your genetics, lifestyle, workout and ability to recover.
As of 2014, the price of a First Class stamp is 49 cents. The price changes frequently based on the needs of the U.S. Postal Service. In 1885, the stamp cost a mere 2 cents.
The current postage needed for an international postcard stamp is $1.15 for a standard shaped and size one, in fact it's the same price for a letter of 1oz or less. The USPS lowered the rate from $1.20 back to $1.15 in middle of 2016.