Please let me know if you need any clarification. I'm always happy to answer your questions.

81. Each slice of cheese is 1/11 of 1/2 so the answer is A.

82. Each flight has 1/9 of 1/10 so the answer is A.

83. 10,000 = 10^4 so the answer is B

84. 0.6 * 8.8 is equal to 5.28 so the answer is D

85. 1,000,000 is equal to 10^6 so the answer is A

86. 100,000,000 is equal to 10^8 so the answer is A

87. 10,000,000 is equal to 10^7 so the answer is B

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