How fast is a wave moving if it has a frequency of 10 hz and there are 4 meters between crests?

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.

The mass of a marine organism, in pounds, p years after it is born is given by the polynomial function r(p) = -4p2 + 300p. find the mass when p = 20 years.