16. Which of the following is Irrational number? A. 125 B. 12 C. a D. V27 C.3 D. 4 17. What is the significant digits of 234? A. 1 B. 2 18. What is the significant digits of 0.012? A. 1 B. 2 D.4 C. 3 COM 19. What is the significant digits of 0.0000009? A. 1 B. 2 C.3 D.4 20. The scientific notation of 0.000000377. A. 37.7 x 10-8 B. 37.7 x 108 C. 3.77 x 107 D. 3.77 x 10-7 21. The scientific notation of 482,000. A. 4.82 x 105 B. 4.82 x 10-5 C. 48.2 x 104 D. 4.82 x 104 22. Kevin has a square bedroom with an area of 121 square feet. What is the side length of a wall in his bedroom? A. 25 feet B. 11 feet C. 30.25 feet D. 10 feet 23. A square backyard has an area of 169 square feet. How long is each side of the backyard? A. 35 feet B. 13 feet C. 42.25 feet D. 20 feet 24. A square garden has an area of 152 square feet. What is the side length of the garden? What is the perimeter of the garden? A. Side Length: 38.06 feet; Perimeter: 152.24 feet C: Side Length: 12.16 feet; Perimeter: 48.64 feet B. Side Length: 12.33 feet; Perimeter: 49.32 feet D. Side Length: 38.73 feet; Perimeter: 154.92 feet​