The diameter of a cylinder is doubled, and the height is cut in half. what will happen to the volume of the cylinder? please!

9. (y^-5)^10y^10 a. y^-60 b. y^60 c. y^-150 d. y^150 find the simplified form of each expression. 10. (4/7^5)^2 a.8/14^10 b.16/49^25 c.16/49y^10 d.8/14y^25 11. determine if the number 3.43 times 10^-6 is written in scientific notation. if not, explain. a. yes; the number is written scientific notation. b. no; the first factor is not a number between 1 and 10. c. no; it is not written as a number times a power of 10

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!