Two electronics technicians are discussing conductors and insulators. technician a says that conductors have more free electrons than insulators. technician b says that insulators have lower resistance than conductors. which of the following statements is  correct?  

Technician A is Correct.

You can see this when he says that conductors have more free electrons than insulators. This statement is True.

While Technician B says that, insulators have the lower resistance than conductors. This statement is False.

so easy. just google the electromagnetic waves and it’ll pop up.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form