The world record for the women's 400-meter race is 47.6 seconds. the world record for the mens 400 meter race is 43.18. how much faster is the mens world record time than the womens world record time?

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.