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The square root of 9x plus 7 plus the square rot of 2x equall to 7

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.