Answer:
-69 +92 i (here 'i' is imaginary value)
Step-by-step explanation:
step:-
Given (3-4 i)(-2-21)
on multiplication, we get
(3-4 i)(-2-21) = 3(-2) -3(21) - 4 i (-2) +4 i(21)
= -6 -63 + 8 i +84 i
= -69 +92 i
-69 + 92 i is a complex number.
real part x = -69
imaginary part y = 92
Answer
Find out the what is the width .
To prove
Let us assume that x be the scalar multiple of the height and width of the packaging label .
As given
The ratio of the height to the width of a packaging label is 5 to 19.
If the height of the label is 1.5 inches .
Than the equation becomes
5x = 1.5

x = 0.3
Than
The width of a packaging label = 19 × 0.3
= $ 5.7
Therefore the width of the packaging label is $ 5.7 .
The answer will be option B.