Solve the inequalityr divided by negative 2.5 is less than or equal to 8.7 for r.
To solve the inequality, we need to isolate the variable r. We can do this by multiplying both sides of the inequality by -2.5 (since dividing by -2.5 is the same as multiplying by its reciprocal, which is -1/2.5 = -0.4):
(r / -2.5) <= 8.7
(-2.5)(r / -2.5) <= (-2.5)(8.7)
r <= -21.75
Thus, the solution to the inequality is r <= -21.75.