Question: Let \(B\left( s,t \right)\) be the number of minutes it takes a quart of water to boil when the water contains s grams of salt and the temperature of the heat source is t degrees Fahrenheit.

(a) Write an interpretation of \(B\left( 3,245 \right)=4.1\)

(b) Write an interpretation of \(\left. \frac{\partial B}{\partial s} \right|_{\left( s,t \right)=\left( 1.5,220 \right)}^{{}}=0.6\)

(c) What are the units for \({{B}_{t}}\left( s,t \right)\)