Let s(m, n) denote the number of onto functions from a set with m elements to a set with n elements. show that s(m, n) satisfies the recurrence relation

Given the following statements, which is the best

An energy plant is looking into putting in a system to remove harmful pollutants from its emissions going into earth's atmosphere. the cost of removing the pollutants can be modeled using the function c = 25000p/100 -p what is the vertical asymptote?

Write the rational number in lowest terms 99/-15