Question: ? ? m 3 h P = 9 0 I I 2 + I + 1 where I i s the light intensity ( m

??m3hP=90II2+I+1
where I is the light intensity (measuredin thousands of foot-candles). For what light intensity isP a maximum?
I=, thousand foot-candles
? ? m 3 h P = 9 0 I I 2 + I + 1 where I i s the

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