- Given : A=Πr2 find dA/dr?

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How many moles of H+ ions are present in 102.9 mL of 0.42 M nitric acid? Enter to 4 decimal places.? First day working at circle k? Is there some numerical value what represent how well the elements(like chlorine,sodium) react? The Mercator projection is distorted near the A) equator B) poles C) prime Meridian or D) date line? How do i find the range of f(x): 1 / (x^2 + 7) ?