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express 1999/2111 in decimal

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Others Other Question

If sum of the square of zeros of the quadratic polynomial f(x)=x2-8x+k is 40 find the value of K A spruce tree when planted was 3 feet high and it
grew by an equal number of feet each year. At the
end of the seventh year, it was one-ninth taller
than at the end of the sixth year. How tall was the
tree at the end of the twelfth year?