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Find the number : a. (4xx10^(5))+(3xx1...

Find the number :
a. `(4xx10^(5))+(3xx10^(2))+(7xx10^(0))`
b. `(3xx10^(6))+(8xx10^(3))+(1xx10^(1))`

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{:("Column A"," ","Column B"),(2 xx 10^1 + 3 xx 10^(0) +4 xx 10^(-1) + 5 xx 10^(-2),,1 xx 10^(-3) + 2 xx 10^(-2) xx 10^(-2) + 3 xx 10^(-1) + 4 xx 10^(0) + 5 xx 10^(1)):}

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