Okay.. just think about it a little more.
1500 divided by 5 = 300 You wrote that step backwards. 300 X 2.50 = 750 Why did you subtract 120 and 36?? that isn't needed? Multiply 750 x .3 is correct $225 is the answer. What part is confusing. if you have 1500 lbs and each bag weighs 5 lbs. YOU must have 300 lbs. righ...
It costs $2.50 per bag and you have 300 bags. You have to multiply them. Does that make sense?
5 lbs per bag... How bags will you have? 1500/5 = 300 bags how much does she pay for the 300 bags? Can you do this step? If so, the next step is just multiplying that answer by .3 to find the profit.
tan x = opposite/adjacent cot x = adjacent/opposite they are reciprocals of each other. tan x = 1/cot x Can you finish from here?
You are welcome.
56/(56+x) = 70/100 silver/(silver + additive) silver / total weight is 70% or 70/100 56/(56+x) = .7 Cross multiply and solve for x
I guess it can be D.. but I still like A better.
You have to find the mass of 1 mole first. Then you will know what fraction of a mole you are working with one mole has 5 carbons your fraction of a mole has ? carbons