Asked by Anonymous

the press was invented about 1450 and had little change for 350 years. since then many changes have been made. how many decades have changes been occurring?
Answered by Ms. Sue
1450 + 350 = 1800

2012 - 1800 = 212

212 / 10 = 21 decades
Answered by talal
50 out of350studentwho sat a test scored less than 50 marks what percent scored less than 50 marks
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