Which expression is equivalent to 4 + 6(ac + 2b) + 2ac? -4 + 8ac + 12b -4 + 10ab + 2ac -4 + 12abc + 2ac -12ac + 20b

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

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?