Refer to the following situation You decide to rent a car fr

Refer to the following situation. You decide to rent a car from a company that charges a $25.50 rental fee plus $0.05 per mile for every mile the car is driven. Which of the following statements are true? The rate charged per mile driven is a fixed quantity The rental fee is a fixed quantity The cost of renting the car is a fixed quantity Both (a) and (b) are true. Both (b) and (c) are true. Let d be the mile>> driven in the rental car, and let c be the coat in dollars of renting the car. Which of the following formulas is correct?. Delta d = .05 Delta c d = 25.50 + .05e Delta c/Delta d = .05 Both (a) and (b) are true. Both (b) and (c) ore true. A particular cookie recipe calls for one cup of flour to start, along with an additional one-half cup of flour for every cup of sugar. Let x represent the amount of flour used (measured in cups) and let y be the amount of sugar used (measured in cups). Which of the following statements is true? x and y are proportional. Delta x and Delta y are proportional. The y-intercept is the point (0, 0). Three cups of sugar correspond to 1.5 cups of flour used. All of the above statements are true. Problems 9 and 10 refer to the following situation. Cole is standing on a level playing field when he thrown a ball to Janice. The height H of the ball in feet above the ground a seconds after Cole throws it is given by the function H = f(s)= 5.5 -2(s - 1)^2 The maximum height of the ball above the ground will be H = 2 feet H = 5.5 feet H = 3.5 feet H = 7.5 feet H = 10 feet Janice does not catch the ball. How many seconds will pass before the ball hits the ground? t = 1 seconds t 2.5 seconds t = 2.66 seconds t = 3 seconds t 1.87 seconds Suppose that A la the degree measure for an angle. Which of the following expressions must be equal to sin (A + 720 degree)? sin(-A) -cos(A) -sin(A) cos(A) sin(A)

Solution

6. cos t,c =fixed cost + .05 * number of miles driven

c= 25.5 + .05d

Here the fixed quantity is 25.5 that is the rental fee

Hence the correct option is b

7. c=25.5 + .05d

delta C= .05 delta d

deltaC/delta d=.05

Hence the correct option is c