# Posts by Fel

Total # Posts: 9

**Precaculus **

I seriously have no idea where to start in these questions tumor is a collection of cancerous cells. Suppose each cancerous cell has a radius of 5×10?3 cm, and that the doubling time for a population of cancerous cells is 20 hours. If the tumor has an initial volume of 0...

*March 8, 2017*

**Math (Semicircle)(Pre-calc)**

Thanks Steve!

*January 17, 2017*

**Math (Semicircle)(Pre-calc)**

goo.gl/photos/e6Ks3v4Qqj177Nun6 The graph below is made from two semicircles. The domain of the function in the graph is [?8,8] [-8,8] . Find a piecewise formula for the function f(x) f(x). Help please, I already on my last attempt and any help is greatly appreciated!

*January 17, 2017*

**Stoichiometry**

TiCl4:O2 1:1 3.5mol:4.5mol since TiCl4 is present in fewer amounts (moles), therefore TiCl4 is the limiting reagent.

*March 27, 2011*

**chemistry**

oh another question pliz... why different masses of ppt were obtained for test tube IV and V??... LAB QUESITONS

*March 27, 2011*

**chemistry**

thanks alot!!

*March 27, 2011*

**chemistry**

no like when you use it in an experiment of a precipitate

*March 27, 2011*

**chemistry**

why must a clean rod be used each time?

*March 27, 2011*

**Physics**

an anchor shoots an arrow into a piece of wood. the arrow is traveling at 120 km/h when it strikes the wood. the arrow penetrates 3.8 cm into the wood before stopping. what is the average acceleration (in m/s^2) into the wood?

*January 21, 2008*

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