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The original TI-30 was notable for its very low cost for the time, around US$25. This was much less than the retail prices of other scientific calculators of the era; for example, Hewlett-Packard's cheapest scientific calculator at the time was still well over $100. The Casio FX-20, another popular scientific calculator, sold for roughly double ...
During the time of Sir Isaac Newton, Master of the Mint, the gold guinea was fixed at 21 shillings (£1/1/-) in 1717. But without addressing the problem of underweight silver coins, and with the high resulting gold-silver ratio of 15.2, it gave sterling a firmer footing in gold guineas rather than silver shillings, resulting in a de facto gold ...
New installations of renewable energy in India surpassed installations of fossil fuel for the first time in 2016–17. [39] On 29 March 2017, the Central Electricity Authority (CEA) stated that for the first time India has become a net exporter of electricity. India exported 5,798 GWh to neighboring countries, against a total import of 5,585 GWh.