Millimeter
centimeter
decimeter
meter
dekameter
hectometer
kilometer
there is it
ON = MN =x
ON² + MN² = OM²
x² + x² = 8²
2x² = 64
x² = 32
x = √32 = 4√2
The answer is going to be D. S-2ac/2a+2c
I think its A not 100% sure its the only one that starts on -3 but i think it is hope i helped you out