A speck of dust is 1.2 x 10-6 m wide. Which of the following is the best way to rewrite this quantity, using more appropriate units?
A. 1.2 x 10-4 cm
B. 1.2 x 10-9 km
C. 1.2 x 10-3 mm
D. 1.2 x 10-6 m

c. 1.2 x 10-3 mm

Step-by-step explanation:

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this