Steady-state creep data taken for an Fe at a stress level of 150 MPa are given here: E's h^-1 E's h^-1 T (K)
7x10-4 1100
9x10-2 1220
If it is known that the value of the stress exponent, n, for this alloy is 8, compute the steady-stare creep rate at 1300 K and a stress level of 90 MPa.