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6 July, 12:51

N the United States in the 20th century, average life expectancy increased from about 47 years to about 77 years. Find the percent of increase to the nearest percent.

A. 39%

B. 64%

C. 264%

+2
Answers (1)
  1. 6 July, 16:22
    0
    About 64 percent so your answer is B
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