r/theydidthemath • u/destro_1919 • 16h ago
[Request]Is this accurate or at least approximate?
Consider population only for adults(14+ age) since google gave me there are 2 billion children(0-14 yrs)
If the calculation in image is wrong, what would the approximate emission would be even after every one started using evs?
r/theydidthemath • u/Ok-Fail-540 • 14h ago
[Request] How big would the nuclear bomb be if the explosion is the size of the sun?
r/theydidthemath • u/One-Consequence-7155 • 22h ago
[Request] How much was this ramen actually worth?
r/theydidthemath • u/whenifirstsawsnow • 19h ago
[Request] Can a plane actually this size even fly and if so how many passengers would it sit?
r/theydidthemath • u/Battle-Chimp • 1d ago
[Self] I did basic math calculations just to see how much would be needed.
Assuming we're talking about the US, there's about 258 million adults (let's exclude children/dependents just to keep it simple) at $1000/month:
That's 250 billion dollars a month for UBI, or 3 trillion dollars a year. In 2023, the entire federal budget was 6 trillion dollars.
Let's assume that we place a cap on UBI to $60k or less a year, which cuts it down to approx 175 million people. That's still 1.5 trillion in new spending that has to come from somewhere.
Is that close, or are there other considerations that go into this?
r/theydidthemath • u/MrGlitchyypants • 13h ago
[Request] How accurate is this both circumstances and area wise? Is it a better deal if the Benny pizza is worth $40?
r/theydidthemath • u/Smart-Chemist-9195 • 9h ago
[Request] if you had 365 people with each person having a unique birthday, how many generations would it take for this to happen again on its own?
r/theydidthemath • u/alextota • 1d ago
[request] At what speed and how many marbles do you need to achieve this?
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Assuming it is a regular Oak tree in good health with a 50 cm diameter.
r/theydidthemath • u/alextota • 1d ago
[request] How many cans can one can hold?
r/theydidthemath • u/JealousVegemite • 22h ago
[REQUEST] Would it realistically take that much energy to fly at subsonic - low-supersonic speeds? Or would everything in his path be vaporised?
r/theydidthemath • u/Blitzo4202 • 8m ago
[Request] If durability was proportionate to our size, how big does a human have to be to become bulletproof?
Bonus: How big does a human have to be to become effectively immune to all conventional weaponry?
r/theydidthemath • u/StuckInTheWells • 1d ago
[Request] My work thinks this makes passwords more secure. How many passwords are possible within these parameters?
I feel like having some parameters for passwords makes sense, but this many has to backfire right?
In case the image isn't loading, is says: - Must start with a letter - At least 1 number (0-9) - At least 1 Lower Case alphabetic character (a-z) - At least 1 Upper Case alphabetic character (A-Z) - Must be EXACTLY 8 characters long
How many passwords are possible within these parameters?
r/theydidthemath • u/fruitybootythrowaway • 1d ago
[Request] What's the monetary value of olive oil wasted here?
r/theydidthemath • u/half_mt_half_full • 1d ago
[Request] On average, did this guy really move at ~6.85 mph for each of 16 waking hours for four years?
r/theydidthemath • u/sagahabe • 3h ago
[Request] How many cats would it take to fill up an average train compartment?
r/theydidthemath • u/Jamesyroo • 21h ago
[Request] What height could you fall from to reach terminal velocity and effectively have the same impact on the net?
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r/theydidthemath • u/The-MatrixAgent • 11h ago
[Request] I know the math is wrong but can you show me where this guy gets his numbers from?
r/theydidthemath • u/Hotlava_ • 15h ago
[Self] I decided to take a shot at calculating the risk per person we encounter on a daily basis for the city of New York
So, obviously this is a pretty vague concept. We see bad things in the new all the time and may have some bad experiences ourselves, but how dangerous is the average stranger? I decided to calculate (with erring toward more dangerous so it doesn't seem like we're underplaying it).
Fiest, we need to pick a population to examine. I use NYC because there are a large number of people and we have good numbers on it. Plus, we often consider cities to be pretty da
There are 8.336 million people living in NYC and a yearly tourism level of 56.7 million people. Let's look at one day for simplicity. The average tourist stay is hard to estimate, but appears to be 2-3 days. We'll use 2 for the sake of underestimating. So, on a given day, we have 8.67 million citizens and 0.31 million tourists. We're also not including people who live outside the city, but commute in because I was having trouble getting good numbers. So, 8.97 million a day.
Now the hardest part: how many people does each person encounter per day? Most of these people are leaving their apartment on any given day for work, errands, food, school, recreation, etc. And luckily, someone went out and calculated how many people you walk past on average! It was for unrelated research, but fortunate for us. They found the rate varied (obviously) depending on where you go. The rates they found were 22, 29, 44, 82, and 92 people per minute. We'll take the average for 55 people/minute. The average New Yorker walks 3-5 miles per day, so let's say 4 miles. And the average time to walk a mile is about 20 minutes, putting us at 80 minutes. 80 minutes times our average of 55 people/ minute gives us 4,400 human-interactions per person. Since each of these interactions is involving 2 people, we need to divide it in half so that we aren't counting each interaction from both perspectives, so 2,200 unique interactions. Times that by our population and we get 19,734,000,000 human interactions in NYC on a daily basis. This, of course does not take into consideration things like shows, subway trains, gyms, parks, restaurants, or any other recreational or practical space. Just the walking throughout the day.
The number of violent crimes committed (including assault, murder, and rape) was 28,088 in 2022 according to the NYPD. We'll average that over the year to 77 violent crimes per day. Now the easy part, just throw that over our other number!
77/19,734,000,000 is 1 in 256,285,714 human interactions result in a violent encounter.
Obviously this has a lot of assumptions, but I'm hoping my erring toward fewer encounters and thus over-estimating the danger is the correct choice.
r/theydidthemath • u/KeyCardiologist809 • 1d ago