please help with the steps

11. Which expression has a value of (? 1) -(-7)+2x(-5)0 -(-4)"' 14. Write [ (-7) x3]" as a product of powers. A. 4(-7) x 3 ii) (7x5)"-(5-4) +(8-5) B. (-4)4 iii) 5-(4+4)- -(-8)0 iv) (4x4+8)-(52-73)0 -(-7)" C. (-7)* +34 A. ii and iii D. (-7)* x 34 B. i, iii, and iv 15. Which expressions have positive values? C. i, ii, and iv D. i and iv 12. Evaluate: (-8)* + (-8)* 11) [-(-5)3]' A. -8 B. 1 C. -1 D. 0 iv) - [-(-5)= ]' 13. Evaluate: 103 x 105 + 105 A. ii and iv A. 10 100 000 B. ii and iii B. 1 000 000 000 000 C. i and ii C. 120 D. i and iv D. 10 000 100 000 Short Answer 16. Write the product of ten thousand times one thousand as a power of 10. 18. Write the product of 7" x 7' as a single power. 17. Which number. (4x 105) + (4x 10' ) + (4x 10') or 19. Evaluate: 33 x3* - 35 x3 4 400 400, is greater? 20. Write (8 +9)' as a quotient of powers. Problem 21. Evaluate: 2* x33 x52 22. Identify, then correct, any errors in the work Show your steps. shown. 52+3x42 -32 32 -(5x4") 25+3x16-9 9-1 28 x 7 8 196 8 = 24.5 2