Can you pass this 1960s quiz?
Which river caught on fire multiple times in 1969, which resulted in the Clean Water Act, Great Lakes Water Quality Agreement, and the creation of the federal Environmental Protection Agency?
The Maumee River
The Cuyahoga River
The Tuscarawas River
The Muskingum River
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Erin reads an average of 20 books per year. She read 23, 17, 20, and 19 books in four different years. How many books did Erin read in the 5th year to make it an average of exactly 20.0 per year?