This is algebra. I don't understand it. Please help me with nos. 12, 14, 15, 16 & 37. All information is there in the screen shots.

2 gptc.blackboard.com/ultra/cou H1111: College Algebra (60155) . Assignments ... Module 5 Absolute Value Functions, Power Functions, and Polynomia Online Homework The loudness, L, of a sound (measured in decibels, dB) is inversely proportional to the square of the distance, d, from the source of the sound. A person 5 feet from a jetski, it is 80 decibels loud. How loud is the jetski when the person is 45 feet away? (Round to 3 decimal places.) dB Question Help: Video Message instructor Submit Question Question 15 0/3 pts 5 3 99 @ Details 7 7 A power function with form y = ax passes through the points 3, and 5, 243 Find the 3125 constants a and p a = Question Help: Video Message instructor Submit Question Question 16 0/3 pts 9 3 99 @ Details A power function with form y = and passes through the points (3, 108) and (6, 864). Find the constants a and p a = P = Question Help: Video Message instructor2% gptc.blackboard.com/ultra/courses/_22198_1/cl/outline C TH1111: College Algebra (60155) . Assignments ... Module 5 Absolute Value Functions, Power Functions, and Polyno 5 Online Homework Question Help: Video Message instructor Submit Question 1.5/3 pts 0 3 98 @ Details Question 12 State sales tax S is directly proportional to retail price p. An item that sells for 184 dollars has a sales tax of 10.22 dollars. Find a mathematical model that gives the amount of sales tax S in terms of the retail price p. Function: S(p) = What is the sales tax on a 370 dollars purchase. Round to the nearest cent. The sales tax on a 370 dollar purchase is $ Question Help: Video Message instructor Submit Question Question 13 3/3 pts 9 2 99 0 Details Score on last try: 3 of 3 pts. See Details for more. Get a similar question In Portland, the tax on a property assessed at $840,000 is $12,600. If tax rates are proportional in this city, how much would the tax be on a property assessed at $440,000? Answer: $ 6597L5 Online Homework 0/3 pts Question 27 10 8- 6 - 6 -5 -B -2 - 1 2 3 4 5 The function graphed above is: Concave up on the interval(s) Concave down on the interval(s) There point of inflection is: Question Help: Video Message instructor Submit Question Next Page .O'