I put a picture of the question. My teacher gave us the answer key to check and the answer key said it was 15.42 feet. Every time I try to solve the problem I don't get that but I Have to show my work or I get the problem wrong. NO LINKS! :)

Which of the following describes the graph of y--4x-36 compared to the parent square root function? stretched by a factor of 2, reflected over the x-axis, and translated 9 units right stretched by a factor of 2, reflected over the x-axis, and translated 9 units left stretched by a factor of 2, reflected over the y-axis, and translated 9 units right stretched by a factor of 2, reflected over the y-axis, and translated 9 units left save and exit next submit