Some General Questions

[Skullmaster4]

These are some general questions I need help with for some of my Sac revision,

The questions are as follows;

One:

When ordering parts in the real world, why would you use a 2 decimal accuracy, give a few dot points.

Two:

How would you write the following equation using "Formal function notaion" 3(x+2)-x^2, the domain is 0 x 5

Three:

State a hybrid function for the following two equations: ((x-4)^2)+5, 0 x 4  &  (0.2(x-3)^2)+5, 4 x 8



Hope someone can help!!


Thanks  !!

[Mao]

These are some general questions I need help with for some of my Sac revision,

The questions are as follows;

One:

When ordering parts in the real world, why would you use a 2 decimal accuracy, give a few dot points.

Two:

How would you write the following equation using "Formal function notaion" 3(x+2)-x^2, the domain is 0 x 5

Three:

State a hybrid function for the following two equations: ((x-4)^2)+5, 0 x 4  &  (0.2(x-3)^2)+5, 4 x 8



Hope someone can help!!


Thanks  !!

1) lets say you have rounded 1.25 to 1
if you were building a bridge where 1 represented 100m, then you'll be pretty damn stuffed.
take that into context

2) i'm sure you'd have seen this kind of stuff:



so in this case, the first R (representing the domain), will be restricted to your specification.
this will be the "formal" notation.
note, that the second R, codomain, will always be R for the purpose of VCE MM

3) you basically answered it yourself:

if h(x) is our hybrid function