Mary is a scientist. using a microscope, she looks at a salt crystal and discovers it is shaped like a cube. each square face has side length 0.1\text{ mm}0.1 mm0, point, 1, space, m, m.

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8