I need more LGBTQ+ friends

How do you do this? i’ve marked the correct answer but i can’t seem to calculate

Technician a says the harmonic balancer may be attached to the crankshaft using a woodruff key and center bolt. technician b says the harmonic balancer may be attached to the crankshaft using a square key and center bolt. who is correct? choose one answer. a. technician a b. technician b c. both technician a and technician b d. neither technician a nor technician b

50 ppm (50 mg/kg) is equal to 0.005%. how many ppm is equal to 5%?