Which of the following equations best expresses the straight line equation for a mixed cost equation when y = total cost, v = variable cost per unit, x = volume of activity, and f = fixed cost (vertical intercept)?

Can someone check my answer? you

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Can any one me with the answers to these questions asap?