I am in 1st year university so please keep answers to that level

Question 3 (7 points) Cost/Average Cost A linear cost function, in dollars, is given by C (q) = mq+b where $ b is the fixed cost, m ($/item) is the marginal cost and q is the number of items. a) Determine lim C (q) = lim (9) 9-700 . Is l'Hospital's rule applicable? Justify (5 points) 9-7 00 q b) Interpret contextually your finding in question a) above. (2 points) Question 4 (8 points) It was decided that the sea level (mm) in question 2 is better modeled with the following function: 415 s(t) = 1+15e -0.0041 Here t = 0 corresponds to the year 1900. Determine the long run sea level predicted by the updated model above. Question 5 (10 points) Determine for what value(s) of x the function f (x) =25x+ - has a horizontal tangent X line