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September 21, 2014

Posts by josh


Total # Posts: 1,486

math
thanks, tori
August 21, 2012

math
Can someone help me how to solve it. A new medically approved wheelchair was considered to be an improvement over a standard wheelchair by 325 out of 450 patients in a survery. 20) What is the margin of error for the survey? Round your ansewer to the nearest tenth of a percent.
August 21, 2012

social studies
the first native americans gathered what? (3 things) that's why we call them hunter-gatherers.
August 20, 2012

English 125 introduction literature
In your 150 words post, summarize the major similarities and differences between the forms of drama, poetry, and the short story. Demonstrate your ideas with textual examples from the course readings. In your response, include at least one example of each literary form. If you...
August 20, 2012

physics
Hi guyys, could you help me with this question. The center of a circular floodgate of radius 0.5 m is located in a dam at a depth of 2 m beneath the free surface of the water contained by the dam. Calculate the force exerted by the water on the floodgate. The density of water ...
August 19, 2012

physics
a hemispherical bowl of radius 0.5 m is filled with water of density 997 kg/m^3. calculated the force exerted by the bowl. ans: 3840 N
August 18, 2012

physics
Hi guyys, could you help me with this question. The center of a circular floodgate of radius 0.5 m is located in a dam at a depth of 2 m beneath the free surface of the water contained by the dam. Calculate the force exerted by the water on the floodgate. The density of water ...
August 18, 2012

maths
At a certain time of the day a post, 4m tall, casts a shadow of 1.8m. What is the angle of elevation of the sun at that time?
July 31, 2012

Math
John takes 2 hours longer than Andrew to peel 400 pounds of apples. If together they can peel 400 pounds of apples in 7 hours, then how long would it take Andrew to peal the apples working alone? Please round your answer to three decimal places.
July 24, 2012

math
Debbie traveled by boat 5 miles upstream to fish in her favorite spot. Because of the 6-mph current, it took her 20 minutes longer to get there than to return. How fast will her boat go in still water? (Please round your answer to one decimal place.)
July 24, 2012

Math
Steve's boat will go 14 miles per hour in still water. If he can go 13 miles downstream in the same amount of time as it takes to go 10 miles upstream, then what is the speed of the current? (Please round your answer to one decimal place.)
July 24, 2012

Math
6/(a^(2)+a-6) = 4/(a^(2)-9)
July 24, 2012

Math
12/x + 3/(x-3) = x/(x-3) - 1/11
July 24, 2012

Math
(b+27)/(b^(2)-1) - 1/(b+1) = (b-2)/(b-1)
July 24, 2012

Math
5x/(x-4) = x + 20/(x-4)
July 24, 2012

math
1/9 - (k+3)/(72K) = 1/(9k) - (k-1)/(8k)
July 24, 2012

Statistics
A researcher claims that at least 10% of all football helmets have manufacturing flaws that could potentially cause injury to the wearer. A sample of 200 helmets revealed that 24 helmets contained such defects. a. Does this finding support the researcher’s claim? Used a ...
July 19, 2012

Chem
How long must a current of 1.20 A pass through a sulfuric acid solution in order to produce 25.0 mL of H2 gs at 25 degrees C and 1 atm pressure?
July 18, 2012

Statistics
Measurements on the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows; 3.11 2.88 3.08 3.01 2.84 2.86 3.04 3.09 3.08 2.89 3.12 2.98 a. Test the Hypothesis H0: µ = 2.95 versus H1: µ 0 ≠ 2.95, and draw appropriate ...
July 18, 2012

statistics
In a statistic class, 10 scores were randomly selected with the following results were obtained: 74, 73, 87, 57, 71, 68, 65, 77, 67, 66. What are the inner fences?
June 28, 2012

statistics
4-(2.33)(√.25)=2.835 ounces
June 28, 2012

statistics
What is square root n?
June 28, 2012

statistics
The diameter of small Nerf balls manufactured at a factory in China is expected to be approximately normally distributed with a mean of 5.2 inches and a standard deviation of .08 inch. Suppose a random sample of 20 balls is selected. Find the interval that contains 87% of the ...
June 28, 2012

math
last week Coughy worked 4 hours more than Achewy. she also worked twice as many hourse as Pokey. altogether, they earned $252. if couphy earns $6.50 per hour, Achewy earns $9 per hour, and Pokey earns $5 per hour, find the number of hours that each worked.
June 6, 2012

math
the hotdog shack sold 359 hotdogs during their 2-day grand opening celebration on saturday and sunday. the number of hotdogs sold on sunday was 13 less than twice the number of hotdogs sold on saturday. how many hotdogs did the hotdog shack sell on sunday?
June 6, 2012

algebra
math: bobby has $14 more than tina while seda has twice as much money as bobby. together they have $208. how much money does each have?
June 5, 2012

chemistry
2 H20, my bad
June 5, 2012

chemistry
What Volume of 0.575M HCl will neutralize 4.22g of Mg(OH)2? I got the BRE of 2HCl + 1Mg(OH)2 ---> 1MgCl2 + H2O, what do i do from there?
June 5, 2012

geometry
The equation (x + 6)2 + (y + 4)2 = 36 models the position and range of the source of a radio signal. Describe the position of the source and the range of the signals.
May 30, 2012

Chemistry
A sample of Hydrochloric Acid (HCl) has a concentration of 5.00 %(m/v). Determine the molar concentration of the solution.
May 23, 2012

Algebra 2
2(x-2) 2(180-2)=360-4=356
May 17, 2012

algebra
What are the vertical and horizontal asymptotes of y=(4/x-3)+2
May 16, 2012

6 grade math
WHAT SCHOOL DO YOU GO TO
May 15, 2012

language arts
It also affects the way in which one family relates to another, to the neighborhood, and to the community. What correction should be made to this sentence?
May 9, 2012

math
carrie says that one solution to y=3x-5 is (4,7).Describe two ways to check if her statement is true.use at least one way to check her answer.
May 8, 2012

Chemistry (Stoichiometry)
Thank you very much
May 8, 2012

Chemistry (Stoichiometry)
Two students react 15.50g of Lead (II) nitrate with 3.81g of sodium chloride. Predict the mass of the excess reactant left over when the reaction is complete.
May 8, 2012

Math
there are 8 cards, five are black and three are white.The question is " Find the probability of icking a black than white card. HELP PLEASE!!!!
May 8, 2012

College Geometry
In discussing Frieze Groups it was assumed that there is a smallest positive translation along the axis. All translations for the pattern form a subgroup. Consider the axis to be the Reals and G to be a subgroup under +. Look at the infimum T of all strictly positive elements ...
May 8, 2012

math
Inverse of 275? I think it's -275, but I am not sure.
May 3, 2012

Physics Help
Does atomic excitation occur in solids as well as in gases? Yes or No and Why?
May 2, 2012

math
For the arithmetic series 13+19+... a. find tsub27 b. find Ssub27 c. if tsubn = 445, find n
May 2, 2012

Math algebra
Write the following as a sum and/or difference of logarithms log((∛x^2+1)/(x^2-1))
May 1, 2012

Chemistry
What is the [CrO4] in a 2.5 L saturated solution of lead (II) chromate to which 0.05 mol Pb(NO3)2 is added?
April 29, 2012

Math
Actually S=12 L=10
April 25, 2012

Chemistry help!
Hi! In practice, why is the volume of oxygen obtained from the electrolysis of water LESS THAN half the volume of hydrogen obtained? I'm guessing it might have to do with gases escaping? Help!
April 22, 2012

Trig
sin^4t-cos^4t/sin^2t cos^2t= sec^2t-csc^2t i have =(sin^2t+cos^2t)(sin^2t+cos^2t)/sin^2tcos^2t then do i go =(sin^2t+cos^2t)/sin^2tcos^2t stumped
April 19, 2012

Pre-Calc help NOW PLEASE!!!
Evaluate the expression under the given conditions. tan(A+B); cosA=-1/7, A in quadrant 3, sinB=1/2, B in quadrant 2.
April 18, 2012

chemistry
Which of the following will cause a greater amount of oxygen to dissolve in 100 g of water?
April 17, 2012

chemistry
thank you so much!
April 16, 2012

chemistry
A liquid was analyzed to be 54.5% C, 9.10% H, and 36.4% O. An empty flask, whose mass was 45.32 g, when filled with the vapor of the liquid at 735mm Hg and 99.2°C had a mass of 46.05 g. The volume of the flask was found to be 263.2 mL. empirical formula -> C2H4O What is...
April 16, 2012

Pre-Calc !!!
Prove the identity. 2tanx/1+tan^2x=sin^2x
April 16, 2012

chemistry
A closed container has a mixture of methane, CH4, ethane C2H6, and propane C3H8. If 12.5 g of methane, 36.0 g of ethane, and 14.0 g of propane have a total pressure of 890. mm Hg, what is the partial pressure of each of the gases in the container?
April 15, 2012

College Comp II
What is the meaning & how did you figure it out? thanks March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy* band *a toot* Complete with medals *a honk* cornet Against *a thump* one side of his lips And the other stuck with...
April 12, 2012

Comp II
Need to write a 1000 word essay about this, but I can't figure out what the poem is even about. What is the meaning & how did you figure it out? thanks March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy* band *a toot* ...
April 12, 2012

ENGLISH HELP
What is this poem's meaning and how did you understand it? March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy* band *a toot* Complete with medals *a honk* cornet Against *a thump* one side of his lips And the other ...
April 12, 2012

Chemistry
thanks
April 2, 2012

Chemistry
the only chromate used was the amount present in 1mL of Mohr's indicator. Does it matter if no addition chromate was added?
April 2, 2012

Chemistry
Using the total volume at endpoint (51.98mL) and the fact that the concentration of CrO4 ^2- due to Mohr's indicator is 0.26 M, find the actual concentration of CrO4^ 2- at the endpoint (or at the instant just before Ag2CrO4 begins to form). Any help I am completely lost ...
April 2, 2012

Math
What is the number of revolutions in a 450pi radians
March 30, 2012

math
31 lbs of bananas cost $248. How much would 40 lbs cost?
March 28, 2012

Physics
A rectangular loop of wire, L = 26.2 cm and W = 15.4 cm, carries a I1 = 1.83 A current and lies in a plane (d = 13.6 cm), which also contains a very long straight wire carrying a I2 = 10.5 A current. I used this equation: F1+F2 = mu0*I1*I2*0.262/(2pi)*(1/0.136-1/0.290)=2.57*10...
March 24, 2012

All Sub
Yeah im talking about grades.
March 24, 2012

All Sub
If you have 21 questions and you miss 2 whats your score? How do you find out?
March 24, 2012

geometry
rectangle a is similar to smaller rectangle b. the scale factor is 5/3. if the area of rectangle a is 150 square inches, what is the area of rectangle b?
March 22, 2012

Physics - Static Forces
Blocks 1 & 2 are connected by a string. Block 1 is on an incline & has a mass of 5.4kg. Block 2 is hanging from the string & has a mass of 2.1kg. The coefficient of friction is 0.22 between all surfaces. 1: What is the minimum angle "theta" can be while keeping the ...
March 18, 2012

Physics
No.
March 17, 2012

CAL 2
Use Euler's method with step size 0.2 to estimate y(1), where y(x) is the solution of the initial-value problem y'=5x+y^2, y(0)=-1 y(1)=
March 15, 2012

english 11
4. Which of the following statements about Anne Bradstreet is NOT true? (1 point)Anne Bradstreet was never married. Anne Bradstreet was the first published poet in America. Anne Bradstreet was born and educated in England. Anne Bradstreet favored poems with regular rhyme ...
March 14, 2012

cal 2
Use Euler's method with step size0.4 to estimate y(2) , where y(x) is the solution of the initial-value problem y'=5x+y^2, y(0)=1. Y(1)=
March 12, 2012

English 11
Thanks Roscoe if these are true...
March 12, 2012

physiscs
a 75w and 50 w incandescent light bulbs are designed fot use with the same voltage. what is the ratio of the resistance of the 75- w bulb to the resistance of the 50 w bulb?
March 8, 2012

physics
the elecric potential at a certain point is space is 12 V. What is the electric potential energy of a -3.0uc charge placed at that point? is it +36uj?
March 8, 2012

physics
A -4.0UC charge is located 0.45m to the left of a +6.0uc charge. what is the magnitude and direction of the electrostatic force on the positive charge?
March 8, 2012

english
I have a Question about The Merchant of Venice By william shakspear. What are Some promises made in the stor??? Please help!
March 4, 2012

math
For the next three problems, evaluate each expression if x = −2, y = 4, and z = −3. (4 − 2x)−2 (y − z)−3 (x − 5y)0
March 1, 2012

math
Rewrite using only positive exponents: x−5y3. ??
March 1, 2012

math
Write an expression for the volume of a rectangular prism if the length is 5 feet shorter than some x amount, the width is 3 feet longer than x, and the height is x feet.
March 1, 2012

algebra
(-5,-2,) end point (-7,-5) mid point, how do I find another end point?
February 29, 2012

Spanish-Thank you Srs JMcGin and Ricardo8th grade
Sra, Thank you for responding. I use spanishtypeit to do accents but I actually forgot the accents in both words above Thank you again and thank you Ricardo also for responding
February 29, 2012

Spanish-8th grade
Thank you Ricardo-it was a spelling mistake with te should be de but I see where I made the other mistake. Thanks again.
February 29, 2012

Spanish-8th grade
I'm having a problem answering some questions we're learning about shopping and stuff like that so could someone check these please. 1. ¿Qué buscas cuando vas te compras? Busco variedad de cosas cuando voy me compro. 2. ¿Quien es la persona mas de ...
February 29, 2012

Mathematics
A rectangular block of lead with dimension 43 cm x 53 cm x 63 cm is melted to mould spherical balls of 3 cm radius. How many balls are made? (Round your answer to the nearest whole number and take Pi as 3.14)
February 29, 2012

algebra 2
Graph the function f(x) = –3x^3 + 9x^2 – 2x + 3 using graphing technology and describe the end behavior
February 28, 2012

Chemistry
I need help with finding the theoretical yield of Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g). So far I have 24.305 + 37.4688 = 61.7738 g based on the weight of MgCl2 + H2, but I'm not exactly sure what to do or if I've even started it properly. Also, if you could help ...
February 28, 2012

Precalculus
Solve Cos^2(x)+cos(x)=cos(2x). Give exact answers within the interval [0,2π) Ive got the equation down to -cos^2(x)+cos(x)+1=0 or and it can be simplified too sin^2(x)+cos(x)=0 If you could tell me where to go from either of these two, it would be great help.. Thankyou ...
February 23, 2012

ASHFORD
Identify two distinct fallacies you see committed in the media.
February 23, 2012

Algebra 2
My question involves "Graphic Representation of Radicals of the Second Order" I know that the length of the hypotneuse of a right triangle equals the square root of the sum of the lengths of the two legs. The problems I'm having trouble with are the square roots ...
February 23, 2012

math
(4m-20)(7m)/(5m-25)(28)
February 23, 2012

chemistry
3. Answer the following questions: For each question show a balanced chemical equation and show all calculation for full credit. a. Assume that you had 100 nuts (N) and 75 bolts (B). How many NB molecules could you make by screwing one nut onto each bolt?
February 23, 2012

consumer math
6. These items were on Cyril's last credit card statement. Last Balance Payment Periodic Rate New Charges $567.18 $120.00 1.56% $45.17 What is his new balance? (Points : 1)
February 22, 2012

science
i come u face???
February 22, 2012

Chemistry
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 18.9 g of biphenyl in 26.4 g of benzene?
February 22, 2012

consumer math
23. Jeremy had a starting balance of $122.00 in his savings passbook. He made these transactions: Deposits of $68.52 and $46.35; Withdrawals of $95.00 and $20.50; Interest $1.50. What is his final balance? (Points : 2) $125.22 $120.22 $112.22 $122.87 24. Banks pay interest on ...
February 21, 2012

Chemistry
When 4.73 g of a nonelectrolyte solute is dissolved in 965 mL of water at 28 °C, the resulting solution exerts an osmotic pressure of 945 torr. What is the molar concentration of the solution? How many moles of solute are in the solution? What is the molar mass of the solute?
February 21, 2012

statistics
What probability value should be used for determining whether the modified process results in a defect rate that is less than 6%. I got part a and b of the question but I am completely lost on what this is asking me. Can anyone help?!?
February 10, 2012

chemistry
When do you put the suffix (g) after a compound?
February 2, 2012

statistics
the answer is the standard deviation is 6 but i dont know how to get that
January 31, 2012

statistics
the distribution of scores on a test is mound shaped and dsymmetric with a mean score of 78. if 68 percent of the scores fall between 72 and 84, what is the stand deviaition
January 31, 2012

trigmsu
csc(θ) / cot(θ)
January 30, 2012

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