Question 13 (1 point) The cost of manufacturing a molded part is related to the quantity produced during a production run. When 100 parts are produced, the cost is $300. When 400 parts are produced, the cost is $2700. What is the marginal cost of the function? $6.00 per part $8.00 per part $9.00 per part none of above Question 14 (1 point) The relationship between the number of units sold by a company and the profit is linear. If 9 units sold results in $342 profit and 42 units sold results in 1596 profit, find the marginal profit. $38 per unit $19 per unit $76 per unit none of above Question 15 (1 point) Suppose the monthly cost for manufacturing bar stools is C(x) = 33x + 503, where x is the number of bar stools produced each month. Find and interpret the marginal cost for the product. $503 per bar stool; Manufacturing one additional bar stool increases the cost by $503. $503 per bar stool; Manufacturing one additional bar stool decreases the cost by $503. $33 per bar stool; Manufacturing one additional bar stool increases the cost by $33. $33 per bar stool; Manufacturing one additional bar stool decreases the cost by $33. Question 16 (1 point) The paired data below consist of the test scores of 5 randomly selected students and the number of hours they studied for the test. Find a linear equation that predicts a student's score as a equation of the number of hours he or she studied. Hours Score 0 1 2 3 4 0 20 40 60 80 x = 20 y = 20 y = x + 20 none of above Question 17 (1 point) You pay $14.99 per month for 100 minutes of cell phone time. For every additional minute, you pay 10 cents. Your total bill was $26.99 this month. How many minutes did you use? 220 min 120 min 110 min none of above Question 18 (1 point) The paired data below consist of the costs of advertising (in thousands of dollars) and the number of products sold (in thousands). Find an linear equation that predicts the number of products sold as an equation of the cost of advertising. Cost () Number (y) 2 5 9 6 10 70 70 70 70 70 70 x = = 70 y = 70 none of above