An electric firm finds that 4% of its resistors are defective. how many resistors do they have to make to deliver 5000 resistors?

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9