69. The rate at which a population P increases in any country is proportional to the present population. If in 2008, Philippine population is 88 million and in 2015, Philippine population is 101 million. At this rate, approximate Philippine population in the year 2020. a. 105 million b. 110 million C 115 million d. 120 million

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Alloys

An alloy is an admixture of two or more metals or a metal and a non-metal. Since ancient times, man has been using alloys. Alloying helps to retain the properties of the parent matter, such as hardness, strength, toughness, ductility and is corrosion-resistant. Copper alloys such as brass have antimicrobial properties that help to fight against (Coronavirus disease 2019) COVID-19 and other hospital-acquired infections. Some common alloys are brass, bronze, solder steel, etc. Most alloys have a lower melting point than their constituents. This is due to the presence of a nonmetal as one of the constituents that behaves as an impurity and restricts the raise of melting point.