Buzz

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 pl...

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

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

3400/90% = 3777 round to nearest 100 so answer is: 3700

yes. It is a hyperbolic function with asymptotes at x = 0 and y = 0.

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 that's...

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