Suppose the vector gives the numbers of hamburgers, chicken…

Suppose the vector gives the numbers of hamburgers, chicken sandwiches, and cheeseburgers, respectively, sold at a fast-food restaurant in one week. The vector gives the prices (in dollars) per unit for the three food items. Determine the total revenue that the restaurant earned on its three products for that week. Round your answer to two decimal places.  

Suppose the temperature at any point in a steel plate is w…

Suppose the temperature at any point in a steel plate is where x and y are measured in meters. At the point find the rate of change of the temperature with respect to the distance moved along the plate in the direction of the x-axis. Round your answer to one decimal place. ​