$[-/1\mathrm{.}66$ Points$]$

$$ ZILLDIFFEQMODAP$11$M $3\mathrm{.}1\mathrm{.}013.$

A thermometer is removed from a room where the temperature is $23C$ and is taken outside, where the air temperature is $-10C.$ After one$-$half minute the thermometer reads $11C.$ What is the reading of the thermometer at $t=1$min $?($Round your answer to two decimal places.$)$

$C$

How long will it take for the thermometer to reach $-8C?($Round your answer to two decimal places.$)$

$$ min