let t$($h$)$ be the temperature $($in degrees Celsius$)$ at which water boils at a height h $($in kilometers$)$ above sea level. Interpret t$(0)=100$ using a complete sentence and including units. Interpret t$\text{'}(0)=-3\mathrm{.}25$ using a complete sentence and including units. That is$,$ what does this equation mean in words?