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To achieve a 70 percent score on a 49-question test, you need to correctly answer at least 34.3 questions. Since you can't answer a fraction of a question, you need to round up to 35 correct answers. Therefore, you can get a maximum of 14 questions wrong (49 - 35 = 14).
33/49 in a percentage is 67.34. For example, if you get 33/49 on a test, you would have a 67.3%.
The square root of 49 is 7
Can you be more clear about your question
108-((121+49)-72)