Answer
$136.4^{\circ}F$ and $-128.2^{\circ}F$
Work Step by Step
$F=1.8C+32$
Highet temperature is $58^{\circ}C$, for which $F=1.8\times58+32=136.4$
Coldest temperature is $-89^{\circ}C$, for which $F=1.8\times (-89)+32=-128.2$
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