Across 1. Circumference : diameter 3. Fourth degree 10. Excellent grade 11. Type of gym 12. Exclamation of pain 14. Reddish brown Toyota? 15. Peanut butter container 17. Statistic that is better to use than z in a test for mean 18. Exponent that yields desired result for given base 20. Lowest passing grade at STA 21. Abundant elt. 22. Bambi’s mother 23. Base of the natural logarithm 24. This letter must always be crossed in math 25. Same as 20 Across 26. With 34 Across, famous alumnus from 1965 28. Govt. airport screeners 31. Lend an ___ (what your teachers want you to do) 33. Nada 34. See 26 Across 37. Home st. of 26 Across + 34 Across 38. Radiologists 42. GM marque now only in Europe 43. Precal teacher (inits.) 44. High-wattage amplified speakers 45. Confidence interval (abbr.) 46. One level beyond PG-13 47. Degrees of freedom (abbr.) 48. Mr. Hansen’s home st., 1968-86 49. ___-gyn. (med. specialty) 50. St. featured in A River Runs Through It 52. Sample size (lower case) or population size (upper case) 53. Brdcst. radio now used primarily for talk 55. Variety of 80 Across involving shaved ice 56. What Monty Python knights say 57. Flying competitor of UA, DL, and NW 58. Lowest grade at some schools

59. A gross will get you 3 62. Bonus pts. 63. Half a toy? 64. Yellow elt. 65. Most common letter 66. When upside down, “for any” 67. Most common elt. in air 68. Fcn. that rhymes with gosh 70. An article 71. Most common elt. in earth’s crust 72. Sample std. deviation (lower case) 73. Common variable name 74. Same as 17 Across 75. Escort, for example 77. Same as 17 Across 78. Yes, to Yves 80. Its volume is pi r²h/3 84. One ten-millionth of a joule 85. Same as 70 Across 86. Org. in league with CIA, DIA, FBI, NGA, NRO, DHS, etc. 87. Snack sandwich 88. Hexahedral randomizer 89. NBC comedy show 90. Mended Down 1. His secret society proved that a² + b² = c² 2. Roman one 3. 1 - p 4. Olympic chant 5. Tune 6. Large sporting equipment co-op (abbr.) 7. Dynamite (abbr.) 8. 3h² + 15h + 6.4 is quadratic ___ 9. Common application of CCD technology 10. Some inverse trig functions 12. Anyone over 30, if you’re a teenager 13. Attempt to sweet-talk 15. Dr. ___ 16. Same as 70 Across 19. Obtain 24. Normal score 27. Prune 29. Most numerous orchestral instrument type 30. WASPs 31. Type of function whose rate of growth is always a constant multiple of the function itself 32. America has a critical shortfall in this language 35. One level worse than orange 36. Keebler mascot 39. Same as 11 Across 40. Same as 58 Across 41. Cola brand 50. Hellman’s product, briefly 51. Town north of New Mexico’s capital 54. Re follower 55. Yes (sp.) 60. Ms. ___ of the STA science department 61. Lowest grade at STA 68. Homonym of 55 Down 69. Aitch 70. Whizzed a serve by 72. Sch. featured in the blackened squares 76. Husband of Jackie O 79. Letters for those who say, “Beat Army!” 80. Derivative of sin 81. Metal-bearing rock 82. Recent 83. Long, long period