The temperature dependence is $D_T=D_{121}10^{(121-T)/z}$. Thus $D_{141}=60\cdot10^{-20/11}=.911947$ s. Ten decimal reductions require $10D_{141}=9.11947$ s, closest to **9.12 seconds, D**. The factor10 for lethality is separate from the base10 temperature relation.
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