Wednesday
June 19, 2013

Posts by Ella

Total # Posts: 172

geometry
10. Exactly how many cubic inches of air can a fully inflated basketball hold if its radius is 4.8 inches

math
540 kg of dry concrete mixture is to be spread over three surfaces in the ratio equal to that of their areas.If their areas are 9 square m,11 square m and 16 square m,how much is used on each surface?

math
lim (2x^2+3x-2)/ (2x-1) the lim is x->1/2 [ans:5/2 but i get 3/2) can someone show me the calculation work.

math
lim (7-6x^5)/(x+3).... the lim is x->+infinity [ans=-infinity but i get 0] can someone show me the calculation work.

math
f'(x).... y=(e^x-e^-x)/(e^x+e^-x). I need the calculation work. [ans: 4/(e^x+e^-x)^2]

chem
a mixture of 50g of S & 1x10^2g of Cl2 reacts completely to form S2Cl2 &SCl2. Find the mass of S2Cl2 formed.

Chemistry
An electron ps from the 6th to te 3rd energy level in the hydrogen atom: a) calculate the wavelength b) calculate the frequency c) calculate te enrgy d) into which spectral series would the photon be grouped? (i really just need to formulas, then i could solve myself...)

URGENT - History
I tried that!

URGENT - History
Hi, Okay, so where can I get other cartoons on Stalin? I was searching like forever to find that one. Thanks for all your help

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