PL HELP ASAP The cost in dollars of producing x units of a particular brand of notebook is C(x) = x2 – 400.

a. Find the average rate of change of C with respect to x when the production level is changed from x = 100 to x = 102. Include units in your answer.
b. Find the instantaneous rate of change of C with respect to x when x = 100. Include units in your answer.

Which of the following would be a correct step in proving that triangle abc is congruent to triangle cda? a. use a protractor to measure the angles and show that all the corresponding angles are equal in measure. this will allow you to prove congruence by aaa. b. show that segment ab is parallel to segment cd and segment ad is parallel to segment cb. this will allow you to prove congruency by asa. c. show that is segment ab is perpendicular to segment ad. this will allow you to prove congruence by sas. d. none of the above.