PLEASE HELP ASAP!! Ronald spent $10.50 on tools and x dollars on the wood the totem pole. His total cost for totem pole is $19.35. The equation $10.50 + x = $19.35 represents this situation. What is the cost of the wood Ronald used?

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

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

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33