Tuesday
July 29, 2014

Posts by Catie


Total # Posts: 36

Calculus
A farmer wants to build a rectangular pen and then divide it with two interior fences. The total area is to be 2484ft^2. The exterior fence costs $18.00 per foot and the interior fence costs $16.50 per foot. Find the dimensions of the pen that will minimize the cost. What is t...

Calculus
Thank you!!

Calculus
Zoe purchased a house in 1999 for $196,000. In 2004, she sold the house and made a net profit of $80,000. Find the effective annual rate of return on her investment over the 5-year period. (Round your answer to the nearest hundredth of a percentage point.)

Calculus
Doing homework with James, thanks!

Calculus
Paying in cash. Thank you!

Calculus
Denominator

math
stacy multiplied 5x9 andand said the answer was 44. what two patterns could you use to show that her answer is not correct?

Math
A hurricane wind blows across a 6.00 m times 15.0 m flat roof at a speed of 190 km/hr. What is the pressure difference? Use 1.28 kg/m^3 for the density of air. How much force is exerted on the roof? If the roof cannot withstand this much force, will it "blow in" or &...

Math
A hurricane wind blows across a 6.00 m times 15.0 m flat roof at a speed of 190 km/hr. Is the air pressure above the roof higher or lower than the pressure inside the house? Explain. Need help

Please help!
I really dont understand this

Physics help
A gas sample enclosed in a rigid metal container at room temperature 20C has an absolute pressure p_1. The container is immersed in hot water until it warms to 40C. What is the new absolute pressure p_2? Express your answer in terms of p_1. I was told to use p_1/T_1=p_2/T_2 I ...

Physics
A gas with initial conditions p_i, V_i, and T_i expands isothermally until V_ f=6 V_i. What are (a) T_f and (b) p_f? in terms of T_f/T_i and P_f/P_i First I dont understand what this is saying at all. And Second I need to know how to solve it.

Physics
Thank you! That really helped!

Physics
1.9 mol of gas at a temperature of -180 C fills a 3.4 L container. What is the gas pressure? Never been good at physics or mol stuff, how do you set it up?

HELP!
I dont have any other information though except for what is in the original question.

Physics
A block attached to a spring with unknown spring constant oscillates with a period of 7.0 s. Parts a to d are independent questions, each referring to the initial situation. What is the period if... The mass is doubled? The mass is halved? The amplitude is doubled? The spring ...

Chemistry
A compund containing elements A and B has the formula A3B. If a jar containing 100 molecules of the compound A3B, how many atoms of type A are in the jar?

5th grade
What do enzymes do in digestion?

7th Grade Math
z/6 + 11 > -49 This is my problem for homework and I don't know how to do it. My teacher showed us but I guess it didn't get throw to me. ?????????????? Help

7th grade
Ra was a sun god. He took on many of the attributes and even the names of other gods as Egyptian myths evolved. A good example of this is the god Ra and Amun merging to become Amun-Ra or Ra and Horus combining to become Ra-Harakhte. Since Ra was a god of great antiquity, there...

math
take two divded by three

History
Why was an entirely new consitution needed according to Publius?

7th grade pre algebra
z/6 + 11 > -49 This is my problem for homework and I don't know how to do it. My teacher showed us but I guess it didn't get throw to me. ?????????????? Help

CHEMISTRY
thanks!

CHEMISTRY
1.5748(0.944-1.8447Y/1.5377) + 1.90293Y = 0.953 -.4026 Y + 1.90293 Y = 0.953 1.50033 Y = 0.953 Y=.6352 1.5377 X +1.8447(.6352) = 0.944 1.5377 X +1.1717 = 0.944 1.5377 X = -.2277 X=-.148078

CHEMISTRY
I see you took my advice literally about carrying extra places. It isn't necessary to use ALL of those numbers that show up on your calculator. I think 1.5377X + 1.8447Y = 0.944 will be quite sufficient and I suspect even one number fewer still will work ok. As for making ...

CHEMISTRY-For Dr.Bob
thank you so much for all of your help!

CHEMISTRY-For Dr.Bob
thank you, here is what i have. X(1.53768425g)+Y(1.844680696g)=0.944g X(1.574765922g)+Y(1.902934537g)=0.953g to solve this i know i need to use a system of equations, but i'm having trouble setting the coefficients to equal each other.

CHEMISTRY-For Dr.Bob
thank you so much for your help. this is what i have thus far: X(331.74g/2*107.87g) + Y(253.33g/137.33g)=0.944g which is: X(1.54g)+Y(1.84g)= 0.944 is that correct? how would i solve for the nitrates? we didn't measure each one separately--we measured the original sample. t...

CHEMISTRY-For Dr.Bob
My chem class just finished a lab in which the objective was to find the percentage of silver and barium in a nitrate salt mixture by precipitating the chromates, separating out the precipitate from the solvent and spectator ions via filtration, and analysis of the combined pr...

CHEMISTRY
My chem class just finished a lab in which the objective was to find the percentage of silver and barium in a nitrate salt mixture by precipitating the chromates, separating out the precipitate from the solvent and spectator ions via filtration, and analysis of the combined pr...

Contemporary History
thank you!

Contemporary History
i have to write two papers, one about the causes and the other about the effects of world war II. how can i structure them so that i score well?

Chemistry
thank you!

Chemistry
I'm having a hard time getting started studying for my chemistry midterm. i'm kind of overwhelmed. my teacher gave me a brief study guide, but where would be the best place to start? are notecards effective for studying chemistry?

Reading
The Great Depression http://encarta.msn.com/encyclopedia_761584403/Great_Depression_in_the_United_States.html

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