Write tge following numbers expanded forms.
23900068407​

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ac=26 and ch=8, find bh.