Astone is dropped into a well. a splash is heard after 5s. how deep is the well assuming sound travels instantaneously?

Write the expression as a constant , a single trigonometric function, or a power of a trigonometric function. sin x cos x/ tan x

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.