Help with 11,12,13

Not yet Wind turbines are increasingly used to produce renewable electricity. Some of the largest ones can reach over 140 metres tall. The height of the edge of answered a windmill blade is modelled by the function h(t) = acos(b(t -c)) +d. A false statement about the function could be Marked out of 1.00 Select one: Flag O a. the height must be at its maximum when t - O if c = 0 and a > 0 question O b. the b -value is equal to It divided by the period O c. the amplitude is found by subtracting the minimum value from the maximum value and then dividing by 2 O d. the d-value can be found by adding the maximum and minimum heights and dividing by 2 Question 12 Not yet The correct sequence of steps to transform f(x) =( to g(x) = = 4/ 1 \\26 +s) answered Marked out of Select one: 1.00 O a. vertically stretch about the x-axis by a factor or 4, reflect across the x-axis, horizontally stretch about the y-axis by a factor of 2, translate 6 Flag units left question O b. vertically stretch about the x-axis by a factor or 4, reflect across the x-axis, translate 6 units left, horizontally stretch about the y-axis by a factor of 1/2 Oc. horizontally stretch about the y-axis by a factor of 1/2, vertically stretch about the x-axis by a factor or 4, reflect across the x-axis, translate 6 units left 4 O d. translate 6 units left, reflect across the x-axis, vertically stretch about the x-axis by a factor or 4, horizontally stretch about the y-axis by a factor of 1/2 Question 13 If f (x) = 32X, x 2 5 is transformed to y = =f(5x). To the nearest tenth, the smallest possible y-value of the new function is Not yet answered Marked out of 1.00 Flag