What is an example of a internal force

Problem page a medical equipment industry manufactures x-ray machines. the unit cost c (the cost in dollars to make each x-ray machine) depends on the number of machines made. if x machines are made, then the unit cost is given by the function =cx+−0.3x2126x31,935 . how many machines must be made to minimize the unit cost?

The martinez legal firm (mlf) recently acquired a smaller competitor, miller and associates, which specializes in issues not previously covered by mlf, such as land use and intellectual property cases. given the increase in the firm's size and complexity, it is likely that its internal transaction costs willa. decrease. b. increase. c. become external transaction costs. d. be eliminated.

When balancing wheels with either dynamic or road force balancers, technician a says it is really important to follow the instructions provided with the particular balancer you're using. technician b says that when rebalancing a wheel, if it is out of balance, it is best to remove the old weights and recheck the balance before adding new weights. who is correct?