Please help me for makeup test

Order the numbers in each list from least to greatest. −4, 1, −6, 2 a. −4, −6, 1, 2 b. −6, −4, 1, 2 c. −6, 2, 1, −4 d. 1, 2, −6, −4me!

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

What is the value of r of the geometric series?