Just wanted clarification. Thanks

8. 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? (a) r and y are proportional. (b) Ar and Ay are proportional. (c) The y-intercept is the point (0, 0). (d) Three cups of sugar correspond to 1.5 cups of flour used. (e) All of the above statements are true. Problems 9 and10 refer to the following situation. Cole is standing on a level playing field when he throws a ball to Janice. The height H of the ball in feet above the ground s seconds after Cole throws it is given by the function H = f(s) = 5.5 - 2(s - 1)2 9. The maximum height of the ball above the ground will be (a) H = 2 feet (b) H = 5.5 feet (c) H = 3.5 feet (d) H = 7.5 feet (e) H = 10 feet 10. Janice does not catch the ball. How many seconds will pass before the ball hits the ground? (a) t = 1 seconds (b) t = 2.5 seconds (c) t = 2.66 seconds (d) t = 3 seconds (e) t = 1.87 seconds 11. Suppose that A is the degree measure for an angle. Which of the following expressions must be equal to sin (A + 7209)? (a) sin(-A) (b) - cos(A) (c) - sin(A) (d) cos( A) (e) sin( A)12. Suppose that b is the radian or degree measure of an angle. As along as all factors are defined, which of the following expressions is equal to cot (b) cos(b) csc(b) (a) cos?(b) (b) 1 (c) sin?(b) (d) tan(b) (e) cost (b) sin(b) 13. Carlton is drinking a glass of water. When the glass contains 18 mL of water, he places it under the water tap and starts refilling. If 4 mL of water enters flows into the glass every 2.5 seconds, how much water will be in the glass 8 seconds after he started refilling? (a) 12.8 mL (b) 30.8 mL (c) 22.5 mL (d) 10 mL (e) 38 mL 14. The implied domain of the function y = f(x) = In(2x - 1) is the set of (a) all real numbers (b) all real numbers except z = 0 (c) all real numbers 0 (d) all real numbers > > 1/2 (e) all real numbers a