Question 55745
300,000^2 or when asked to give the scientific notation for 800^4-400^2 Thanks! 
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300,000 = 3.0 x 10^5
300,000^2 = 9,0 x 10^10
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800^4 - 400^2 
= (8 x 10^2)^4 - (4 x 10^2)^2
= (4096 x 10^8) - (16 x 10^4)
= (4.096x 10^11) - (1.6 x 10^5)
Cheers,
Stan H.