Saturday

October 10, 2015
Total # Posts: 10

**geometry**

findthe exact area of the region bounded by two concentric circles with a radii of 10 and 6 inches
*May 18, 2013*

**geomerty**

find the area of a circle circumscribed about a equalateral triangle whose side is 18 inches long
*May 18, 2013*

**math**

I'm assuming the question says f(x)=-x^2+5 in which case you substitute 4 in for x: f(4)=-(4)^2+5=-16+5=-11
*February 11, 2011*

**Math**

Integrate (sin^2(t)+1)/(cos^4(t))dt
*February 11, 2011*

**Math**

yes. It is a hyperbolic function with asymptotes at x = 0 and y = 0.
*February 10, 2011*

**5th Grade Math**

thanks for the correction the answer is 3800 otherwise that makes no sense. the question is asking for how many amphibians there are in the world and the 3400 represents 90% of all amphibians in the world. The answer can not be less then 3400 since thats not even logical.
*February 10, 2011*

**5th Grade Math**

3400/90% = 3777 round to nearest 100 so answer is: 3700
*February 10, 2011*

**chemistry**

ok and i had another question: convert the % elemental phosphorus(6.391%) to the % phosphorus present as phosphorous pentoxide (P2O5)
*February 10, 2011*

**Chemistry**

ok and i had another question: convert that to the % phosphorus present as phosphorous pentoxide (P2O5)
*February 10, 2011*

**Chemistry**

express this mass as a percentage of the weight of your sample of plant food. this is the % of elemental phosphorous in the plant food. I'm not sure what the question is asking for. The mass its referring to is 0.06438g Phosphorus and the weight of the plant food is 1.007g.
*February 10, 2011*

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