/sci/ - Science & Math

This is from an online quiz:

Consider the '3' in each statement. Is it a defined number (perfectly known) or does it have uncertainty associated with it (because it is a measurement)?

A triangle has 3 sides

3 mL of water was measured

3 lots of 50 mL were measured

3 scientists all measured 2.5 mL

I have to assign correct options for each statement which are:
>Defined Number so perfectly known
>Has uncertainty because its a measurement
>It is both defined and has uncertainty
>You can't tell


What the fuck is this shit?!

>>8836359
>fell for the Melbourne 4 year bachelors degree meme

>>8465752
>strength needed in space
>sex in space

>>8397465
Didn't know about this

Hi, how do I work out

1/x = 4

and

4x − 2y = 24
2x + 5y = 0

I know you have to add the second one together right? but I get stuck after that step.

We shouldn't drink the milk of animals because it was designed for their offspring.