Answer:
The result in standard form is:

Step-by-step explanation:
Given the polynomials
subtracting 8t² + t from -5t+ 4t² – t.

Remove parenthese: (-a) = -a
i.e. - (8t² + t) = 8t² - t
so the expression becomes
grouping the like terms

Add similar elements: 4t² - 8t² = -4t²

Add similar elements: -5t - t - t = -7t

Therefore, the result in standard form is:

Notice, the third decimal place is 9 in 3.469644...
and after the 469 there's a 6, that means we can round that 469 to a 470
3.470.
I got y^2/2
My Solution:
√9^2/18 · y^2
= 1/2 y^2
Multiply Fractions: a · (b/c) = (a · b)/c
1·y^2/2
=y^2/2
Hope I helped,
Faith xx
10^-3 means move decimal place 3 places to left or divide by 1000
move decimal place 3 places left
0.0030205 is normal form