PUZZLE!!!!

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Across
  1. 5. exercise 9 in 7 minute workout
  2. 9. sum of angles in triangle
  3. 11. barack obama's autobiography
  4. 12. element 8 in periodic table
  5. 13. SI prefix for x1B
  6. 15. exercise 1 in 7 minute workout
  7. 16. SI prefix for /100
  8. 17. SI prefix for /1000
  9. 20. exercise 2 in 7 minute workout
  10. 21. exercise 5 in 7 minute workout
  11. 25. element 53 in periodic table
  12. 26. element 118 in periodic table
  13. 28. SI prefix for /1B
  14. 30. SI prefix for /10
Down
  1. 1. exercise 3 in 7 minute workout
  2. 2. exercise 8 in 7 minute workout
  3. 3. exercise 7 in 7 minute workout
  4. 4. SI prefix for x10
  5. 6. exercise 4 in 7 minute workout
  6. 7. element 101 in periodic table
  7. 8. malala yousafzai's autobiography
  8. 10. SI prefix for x100
  9. 14. exercise 11 in 7 minute workout
  10. 16. the puzzle you are doing right now
  11. 18. element 39 in periodic table
  12. 19. SI prefix for x1M
  13. 21. exercise 12 in 7 minute workout
  14. 22. exercise 6 in 7 minute workout
  15. 23. SI prefix for x1000
  16. 24. exercise 10 in 7 minute workout
  17. 27. roald dahl's autobiography
  18. 29. SI prefix for /1M