30 (apex)
30s
In their 30s
A person's metabolism is expected to drop 3-5% for each decade lived.
A decade lasts on average almost 261 fortnights (almost 522 weeks).
I assume you are looking at bode plots. 20dB per decade means an increase or decrease in signal strength of 20dB for every decade of frequency (10Hz to 100Hz is a decade, 100 Hz to 1000Hz is a decade). This is common talk when discussing filters. If you want further (graphical) explanation, search wikipedia for "bode"
The price would have been, on average for the decade of the 1950's, 12.2% of the average price today.
they make up to 500 trillion per decade
Around 847,243,109 million pesos per decade.
1 to 2 is the average over a decade. Some people of course get none at all.
The world saw that a physical violent stand against communist aggression can and would be made.
On average, about 28 people die of lightning strikes in the United States each year, which would amount to roughly 280 deaths in a decade.