Can flying creatures choose to hover, even if they don’t have hover in their flying speed?

Some creatures have a fly speed. Some creatures with a fly speed also have the ability to hover specified.

The PHB, in Chapter 9: Combat, Movement and Position, Flying Movement says:

Flying creatures enjoy many benefits of mobility, but they must also deal with the danger of falling. If a flying creature is knocked prone, has its speed reduced to 0, or is otherwise deprived of the ability to move, the creature falls, unless it has the ability to hover or it is being held aloft by magic, such as by the fly spell.

The conditions in this paragraph that would result in the creature falling have to do with having movement involuntarily removed or restricted. That might suggest that if you don’t have “hover” in your flying speed, you can’t hover.

But there is a difference between being knocked unconscious, or frozen, or webbed, or otherwise rendered unable to move, and choosing to hover, by flapping your wings, or standing on your jets, or whatever.

So, can flying creatures choose to hover, even if they don’t have hover in their flying speed?

Based on the coinmarket cap api, how do they calculate the bitcoin percent change

I am trying to figure out how coinmarketcap calculates the bitcoin percent change for other coins. For example on ethereum:

enter image description here

I’m trying to figure out how they calculate that bottom BTC percent change 3.85%.

Their api (https://api.coinmarketcap.com/v1/ticker/?limit=100) spits out this data:

{     "id": "bitcoin",      "name": "Bitcoin",      "symbol": "BTC",      "rank": "1",      "price_usd": "8397.08",      "price_btc": "1.0",      "24h_volume_usd": "8190950000.0",      "market_cap_usd": "141531834530",      "available_supply": "16854887.0",      "total_supply": "16854887.0",      "max_supply": "21000000.0",      "percent_change_1h": "-0.51",      "percent_change_24h": "1.0",      "percent_change_7d": "-1.88",      "last_updated": "1518191066" },  {     "id": "ethereum",      "name": "Ethereum",      "symbol": "ETH",      "rank": "2",      "price_usd": "846.675",      "price_btc": "0.101377",      "24h_volume_usd": "3096660000.0",      "market_cap_usd": "82559453770.0",      "available_supply": "97510206.0",      "total_supply": "97510206.0",      "max_supply": null,      "percent_change_1h": "-0.2",      "percent_change_24h": "4.14",      "percent_change_7d": "-5.14",      "last_updated": "1518191052" } 

The first number is stated in this "percent_change_24h": "4.14" but they dont show how they came up with that second number ( 3.85% ).

Is there some formula I can create with the data they provide?

Thanks

[ Politics ] Open Question : Why do you never see a liberal with a sense of humor unless they are mocking someone?

Like that Bill Maher or that churlish Colbert wanker. Girl, Obama was the worst president of all time. Smoke Joe reported and blocked for language. Incel! And girl, I will talk when I want and to whom I want, except Smokey, that one is no good!

If a Hexblade is using a sentient weapon, can they stack the weapons charisma stat with their own for attack and damage rolls?

So I’ve been working on a Half-Elf Hexblade for a bit now and decided he should have a moonblade, which is a sentient elven longsword. Sentient weapons can’t be pact weapons, but you can still choose to use charisma with them using hex warrior. Does the weapons own charisma stat then stack with yours for attack and damage rolls?

Is this a secure way to protect passwords when they must be in plaintext?

I am building a web app which will use my school’s online grade reporting system. Students will sign in to my app using their credentials for the grade website. However, it does not provide an API, which means that my web app will have to store each user’s password to get access to their grade data or force each user to log in every time my app needs access. The web app will need to be able to verify the data from the grade reporting website, so the server will need to log in, which means that the plaintext password will at some point have to be on the server.

My solution is to have each user’s login details be stored locally in plaintext, then have the client send the credentials to the server whenever the server needs access to the grade system. The server would use the credentials to log in, then delete them. Everything uses HTTPS.

I believe that this system is secure because the plaintext passwords are on the server for only a short time and an attacker would not be able to access data stored on the client (assuming my web app is not vulnerable to XSS).

I’m planning to create the server in NodeJS and run it on a VPS.

Is this system secure? If not, what possible attacks exist and how could I prevent them?

Crop image by horizontal lines, but they are not always straight using command line

I have a lot of images looking like this book image paper image

Is there a way to follow the horizontal lines and make a new image from to top of the line to the bottom of the horizontal line and between the end of the image and next horizontal line? I have research using ImageMagick, but i didnt find anything that will work for me. The is the code that it is currently not working for me

./multicrop -f 10 -m save [Source] [Destination] 

Am I scamed? FA exchange trading company is fraud? They are requesting taxes

Are those thieves? https://www.faexchange.com/ I have created a balance of BTC with them and they now request to pay taxes in order to be able to withdraw my profit so I am worried about and wonder why they do no keep the taxes from my earnings?

Additionally to report that they do not allow any withdrawal until they receive the taxes however I have found out that they are included at “bad list” https://badbitcoin.org/thebadlist/index.htm I do not have a bitcoin wallet; but FA exchange never advised me to open one. Should I create one and request from them to transfer the bitcoins there? What about the taxes in this case, should be deducted?

Any kind of advice on how to continue further on to cash/ redeem my Bitcoin would be usable.