For school, can someone help me

[honest shale]

I made it through a book, which had some examples, but they are too superficial

[naive jetty]

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[pastel scarab]

No need to round your answers.
Also, b is wrong.

[honest shale]

Only b or anything else?

[pastel scarab]

Only b is wrong. The others are correct, but you shouldn't round the answers. And they could be solved in slightly better ways.

[honest shale]

Idk, I solved it by some examples in the book, but my lecture book isn’t in English, so I don’t really know if you would understand the message of this book

[pastel scarab]

Why would I not understand it?

Anyway.
For example, I'd solve (a) like this.
e^(-x) = 1/10
-x = ln(1/10) = -ln(10)
x = ln(10)

[honest shale]

That’s the examples from the book

I tried to implement them in my calculation

Anyways, but why is b wrong?

[honest shale]

Nevermind

I understood it

[pastel scarab]

Oh, you meant it is not in English.

[honest shale]

Yes

Sry type error

But I understood my mistake now

[pastel scarab]

Ah, alright, nice!

[honest shale]

I have approximately 1,3863 for b now

[pastel scarab]

Yes, x = 2ln(2) in (b).

Again, why round?

[honest shale]

Idk because I’m lazy and don’t want to write the whole thing after the comma 😭

[pastel scarab]

What?

[honest shale]

I round always if I can actually , never had problems with that

[pastel scarab]

That's not a correct way to solve a math problem.

In math if you don't have to round, you don't.

[honest shale]

My teacher also says, if there are too many numbers, you can round that

Idk

[pastel scarab]

What do you mean? It's an irrational number, it has infinitely many decimal points.
I meant that you should just leave it as x = 2ln(2).

[pastel scarab]

Very strange approach...

[honest shale]

You’re right

Idk I will show up to her

And ask her

But again, we round always, never had any problems

[pastel scarab]

That's just not how you solve math problems.

You round in, say, physics or chemistry, and only at the end of your calculatuions.

You almost never round anything in math problems.

[honest shale]

I use approximately-equal-sign

Isn’t that ok?

[honest shale]

But with approximately-equal-sign you can round, can’t you?

[pastel scarab]

But why, though?

Why not just leave it exact, as x = 2ln(2)?

[honest shale]

It doesn’t feel right to me yk?

I want to see numbers

To understand what I actually wrote

What should I begin with x = 2ln(2)?

[pastel scarab]

What do you mean? That's the answer for (b).

That's it.

[honest shale]

Yes

But I want to see it through my imagination yk?

Or something like that

[pastel scarab]

I don't understand what you mean, sorry.

[honest shale]

Idk

Difficult to explain

I don’t even understand what I calculated

[rugged willow]

@honest shale

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