Calculate the rate of change (slope) of the following function (PLEASE SHOW YOUR WORK)

The water has been on the stove y=9.5x+62.1 after how many minutes will the tempature be 138.1 f

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be bale to prepare using the sauce?

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.