D
use the formula speed = wavelength x wave frequency
It's b 240000
I'm sorry if wrong I'm not too good at these things
Lol I'll just comment to get 5 points
75+ 15x ≥ 140
⇒ 15x ≥ 140-75
⇒ 15x ≥ 65
⇒ x ≥ 65/15
⇒ x ≥ 13/3
⇒ x ≥ 4 1/3
Final answer: x ≥ 4 1/3~
748 inches... You do know there's a meter to inches converter online, right?
