Factor 0.04m^2 - n^2. Please help

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

The height of a plant, in inches, p years after planting it is given by the polynomial function r(p) = -2p% + 270p. find the height of the plant when p = 90 years.

Write a function rule for  “the output is  5 less than the input.” let  xx  be the input and let  yy  be the output.