Find the value of an expression: 2ab +4b+c if a= 10 b=5 and c=3
12)Express 9000 as product of powers of the prime factors. 13)Find the area of circle whose radius is 7 cm
14)A bag contain 4 red balls 5 blue balls and 1 black.
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2ab+4b+c=2×10×5+4×5+3=123
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