Friday
November 28, 2014

Posts by Chris


Total # Posts: 2,244

Trigonometry
If a stake is placed in the ground and is 20cm. high and casts a shadow 12.5 cm. long, what time is it? (The sun rises at 6 a.m. and is overhead at noon.)
October 3, 2012

Math
Which statement illustrates the additive identity? a)3+0=3 b)3-3=0 c)3*0=0 d)3*1=3
October 2, 2012

Chemistry
Calculate the pH of 7.2 × 10-8 M HCl. Report your answer to the hundredths place. Next, What fraction of the total H in this solution is from the HCl? Report your answer to the hundredths place. I apologize for the re-post, but I felt the previous one was labeled ...
September 27, 2012

Analytical
I apologize, I saw my mistake, and used HCL (7.2E-8)/(Total) and got: 51.245% This answer is still wrong, so now I am thoroughly confused.
September 27, 2012

Analytical
Thank you very much for the reply. I was able to solve for X (X = 7.03E-8), which I added to that of HCl (Total = 1.405E-7) and was able to obtain the pH (6.85, assume this answer is deemed correct). Here is my problem: I took the (H^+) from HCL (X?) and divided it by the (...
September 27, 2012

Analytical
Calculate the pH of 7.2 × 10-8 M HCl. Report your answer to the hundredths place. Next, What fraction of the total H in this solution is from the HCl? Report your answer to the hundredths place.
September 27, 2012

algebra
Your salary after a 3% salary increase if your salary before the increase was S, what is the algebric expression?
September 26, 2012

Chemistry
How to do significant values in Chemistry? I am totally stuck; I have no idea what to do? My teacher gave me C due to the significant value error. Please help
September 26, 2012

math
Many thanks!!!
September 25, 2012

math
an urn contains 3 blue chips and 7 red chips. sequentially draw 3 chips without replacement. what is the probability that all drawn chips will not be the same color?
September 25, 2012

statistics
an urn contains 3 blue chips and 7 red chips. sequentially draw 3 chips without replacement. what is the probability that all drawn chips will not be the same color?
September 25, 2012

Algebra 1
-2 - radical bar 5 over radical bar 10 simplify
September 24, 2012

Algebra 1
N/5-9=1/5
September 23, 2012

math
i mande 440 at a yard sell in 10 20 i need to have 5 more 10 than 20
September 19, 2012

algebra 2
y varies directly with x. When y = 20, x = 50. Find x when y = 36.
September 19, 2012

Math Stats
Chris is shopping for CDs and decides to purchase 3 movie soundtracks. The store has 9 different movie sountracks in stock. How many different selections of movie sountracks are possible?
September 19, 2012

math
1/3 + 5/6 = 7/6 7/6 + 3/8 = 37/24 37/24 = 1 13/24 or approx 1.5417
September 19, 2012

health
2. ________ in the pancreatic islets secrete the hormone insulin in response to a high concentration of glucose in the blood. A. Beta cells B. Alpha cells C. Gamma cells D. Sigma cells i put b but it said it was wrong
September 18, 2012

Physics
. The cheetah is the fastest running animal in the world. Cheetahs can accelerate to a speed of 20 m/s in 2.5 an can continue to accelerate to reach a stop speed of 29 m/s. Assume the acceleration is constant until the stop speed is reached and is zero thereafter. (a) Express ...
September 16, 2012

math
Ling bought 5 dishes and 9 glasses for $25.50. Each glass cost 50¢ cents more than each dish. How much did Ling spend the glasses
September 16, 2012

trig
I think you mean find all angles theta between 0 and 2pi.
September 15, 2012

math
What is 77 percent round to nearest tenth of a degcree
September 14, 2012

writing
Can someone check my answers for me? True or False... 1. TRUE you should use a comma before the word “and.” 2. FALSE The following is a sentence fragment: It no longer flies. 3. TRUE In the following sentence, the ()'d word is used correctly: The (Jones’) ...
September 13, 2012

Chemistry
prepare some 0.1 HCl by diluting the appropriate volume of stock 'conc' HCl to 1L. The stock acid is 37.4% HCl by weight and has a density of 1.19g/mL . Measure out the required volume with a graduated clyinder
September 13, 2012

Physics
In a stunt for an action movie, the 100 kg actor jumps from a train which is crossing a river bridge. On the river below, the heroine is tied to a raft floating towards a waterfall at 3 m s−1. The raft and heroine have a total mass of 200 kg. a If the hero times his ...
September 12, 2012

Math
What is 3/4 exivalent to? And 0.9 is exivalent to?(:
September 11, 2012

Math
5/6 is exivalent to? 0.85 is exivalent to? 3/4 is exivalent to? And 0.9 is exivalent to?
September 11, 2012

science
what are the number of digits in a measurement that are known with a certain degree of reliability?
September 10, 2012

Geometry
Use the figure below in which ec bisects ad at c. Find the value of x and the measure of the indicated segment.
September 9, 2012

Calculus
An open top box is made by cutting congruent squares from the corners of a 12 inch by 9 inch sheet of cardboard and then folding the sides up to create the box. What are the dimensions of the box which contains the largest volume?
September 9, 2012

Algebra 1
when the cost of a car is multiplied by 0.07 the results is $1710. Find the cost of the car.
September 9, 2012

math
2x^2+18x-20=0
September 6, 2012

Math (Geometry)
What is the midpoint of line BC with B (2,0) and C (-4,6)?
September 6, 2012

finance
A manufacturing company issues a bond with a 100,000 face value and a coupon rate of 7%. If the bond has a life of 30 years, pays annual coupons, and the yield to maturity is 6.8%, what percentage of the bond's price is the present value of the face value?
September 6, 2012

chemistry
How is overall molecular polarity affected by molecular symmetry (specifically shown for alkenes in book)? And what are the consequences for melting and boiling points (in cases of high molecular symmetry versus low molecular symmetry)? I looked for help in the book but it ...
September 5, 2012

chemistry
What is high molecular symmetry and low molecular symmetry and give examples of both please help!!!
September 5, 2012

healthcare
what is the effects of hippa and other regulations on the use of these media for health care communication?
September 5, 2012

organic chemisrtry
What is a stretch (symmetric versus asymmetric)? What is a bend? ionterpreting infrared spectra NEED HELP PLEASE!!!!!!!!!!!!!!
September 4, 2012

organic chemisrtry
What must a molecule possess to be able to absorb radiation in the infra-red region?
September 4, 2012

organic chemisrtry
How do melting points differ for ionic compounds versus those that contain only covalent bonds? Why is this so (explain)?
September 4, 2012

organic chemisrtry
What is high molecular symmetry and low molecular symmetry and give examples of both please
September 4, 2012

organic chemistry
How is overall molecular polarity affected by molecular symmetry (specifically shown for alkenes in book)? And what are the consequences for melting and boiling points (in cases of high molecular symmetry versus low molecular symmetry)?
September 4, 2012

Math
a rare truffle once sold for 13 dollars and 20 cents for a 0.44 ounce can how much would 1 a pound be
August 28, 2012

Math
I am having trouble figuring out this question: My quotient is 1 more than 30/5. My remainder is 2. What division sentence am I?
August 26, 2012

health
Mean intake of seafood in the United States is approximately 3- 1/2 ounces per week, and increased intake is? A. Not advised B. Believed to cause harm C. Not likely to help or harm D. Recommended i think c
August 23, 2012

help please
thank you
August 21, 2012

help please
i think its d
August 21, 2012

help please
Which age groups benefit from physical activity? A. Children B. Middle aged adults C. Older adults D. All of the above
August 21, 2012

help please
d
August 21, 2012

help please
By making smart food choices, you can help protect yourself from: A. Accidents B. Bone loss C. Type 2 Diabetes D. Both B and C
August 21, 2012

health
it is c
August 21, 2012

health
What types of food can saturated fats be found in? A. Lima beans B. Whole milk C. Seafood D. Potatoes I got A what do you think
August 21, 2012

Algebra
;p
August 20, 2012

Pre algebra math
How do I do 21 - y, explain
August 19, 2012

Math
HELP?! 1.-9^2 2.(5x^9y)(-2x^-2y^-3) 3.(a^1b^-2) / (a^-2b^4) 4.(7x^-1/y^4)^-2 Scientific notation: 5) .0000745 Decimal Form: 6) 9.3*10^6 Solve: 7.3√-27 8.√(-5a)^2 Simplify: 9.√60x^5y^2 10.√75x^3 / √3x
August 16, 2012

Algebra2
So if the absolute vale equals a negative number there is no solution? Such as: |x^2+2x+1|=-4 So, that has no solution?
August 16, 2012

Algebra2
Making Sure these are right? absolute value: 1.|7x+2|=10 x=1.1 x=1.7 2.|3x-5|=-1 x=1.3 x=2
August 16, 2012

Law
The Jones Act, as the Merchant Marine Act was passed to support a strong national merchant marine, requiring that ships transporting goods on U.S. territorial waters to be built, owned and operated by U.S companies. The majority of the crew also must consist of U.S. citizens. ...
August 9, 2012

reading
the answer is captions
August 9, 2012

reading
is it captions
August 9, 2012

reading
the table of contents is the thing you read that shows you what page to turn to of witch chapter.
August 9, 2012

reading
subheads and table of contents
August 9, 2012

reading
I think its b but not sure.
August 9, 2012

reading
In order to get an idea of significant subject areas in a chapter, it is best to read the: A. subheads. B. graphics. C. captions. D. table of contents.
August 9, 2012

reading
When is the best time to read review the discussion questions? A. Immediately after you have finished all of the reading. B. After you write your notes. C. Before you begin any detailed reading. D. At least 1 hour after your detailed reading.
August 8, 2012

math
i used a calculator and the answer is b.
August 8, 2012

chemistry
if the pressure of 1.50L of hydrogen gas at 100 degrees celsius decreases from .500atm to .115atm,what is the final volume. assume temp remains the same
July 31, 2012

college physics
A 565 N mountain climber moves across a rope strung across a canyon. When she is more than halfway across, she notices the rope makes a 10.0 degree angle (from horizontal) behind her and a 25.0 degree angle (from horizontal) ahead of her. What are the tensions in the rope in ...
July 30, 2012

Chemistry
302.4 grams
July 23, 2012

Chemistry
You need to make 4200 mL of 0.450 M CuSO4. How many grams of CuSO4 do you need?
July 23, 2012

spanish
never mind figuerd it out
June 29, 2012

spanish
when will i get the answer?
June 29, 2012

spanish
1.También tengo mi propio auto. 2. Me llamo Mario Verdejo. 3. Soy el mejor chofer de Santiago. 4. Mi nuevo cliente se llama Jaime Talavera y es de los Estados Unidos. 5.Mañana vamos al Valle de Maipo. can some one help me put this in order cant seem to figure it ...
June 29, 2012

ENGLISH
Does the phrase "frozen to the spot" means: I couldn't move because of fear?
June 24, 2012

ENGLISH
Yea sorry typo .. I think it's A because B and C are personification and D is referring to a man and it didn't say what kind of figure it was.
June 24, 2012

ENGLISH
The phrase "my eye caught the shadow means" : A. I saw the shadow out of the corner B. My eye went and grabbed hold of a shadow C. The shadow grabbed my eye D. I saw a man standing at my side
June 24, 2012

Physics help
A wave is described by the equation y = (4.5×10−2) sin (1.9x − 3.2t), where lengths are measured in meters and time in seconds. What is the displacement of a particle at position x = 2.7 m at time t = 5.8 s? Note: Remember that the argument of the sine ...
June 15, 2012

Physics!
The figure shows a uniform disk with a circular hole cut out of it. The disk has a radius of 4.00 m. The hole's center is at 2.00 m, and its radius is 1.00 m. What is the x-coordinate of the center of gravity of the system? The center of the disk is (0,0) The center of the...
June 10, 2012

Physics
A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement? In rad.
June 9, 2012

physics help please
A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement?
June 9, 2012

Physics
A dancer completes 3.4 revolutions in a pirouette. What is her angular displacement? Help me get this answer please.
June 9, 2012

finance
You have finally saved 10,000 and are ready to make your first investment. You have the three following alternatives for investing that money: 1) Captial cities ABC Inc. bonds with a par value of $1000 that pays an 8.75 percent on its par value in interest, sells for $1.34 and...
June 7, 2012

business finance
Her are the data on $1000 par value bonds issued by Microsoft, Ford, and Xerox at the end of 2008, Assume you are thinking about buying these bonds as of January 2009. Answer the following questions. a. Calculate the values of the bonds if your required rates of return are as ...
June 7, 2012

nutrition
What personal boundaries would be establish in a nutrition seminar session?
June 5, 2012

chemistry/check please
-Hydrogen is the lowest density solid 2.which element has the highest? Osmium
June 3, 2012

chemistry
In solid form, what element has the lowest density? Which has the highest density? -Hydrogen is the lowest density solid 2.which element has the highest? can you help?
June 3, 2012

chemistry/help
In solid form, what element has the lowest density? Which has the highest density? -Hydrogen is the lowest density solid 2.which element has the highest? can you help?
June 3, 2012

chemistry/help
In solid form, what element has the lowest density? Which has the highest density? 1. Hydrogen is the lowest density solid 2.which element has the highest?
June 3, 2012

chemistry / help please
What is the name of: ZnNO3, of (NH4)2O, of Rb3PO4, or NH4ClO4?
June 3, 2012

PHYSICS
An applied force accelerates a 50-kg crate along a frictionless floor from rest to 5 m/s.The work performed by this force is most nearly 125 J 250 J(x) 500 J 625 J 1,250 J Can someone please explain this to me and help? I thought it was 250 J but my calculation was wrong.
June 2, 2012

world history
Why did Queen Mary imprison her half -sister Elizabeth? a-She had converted to Calvinism b- She had led an uprising c- She was beautiful d- She was popular and protestant answer: D correct?
June 1, 2012

learing
D.
May 29, 2012

chemistry
the chemical substance called flavin (an anthocyanin) is it write?
May 28, 2012

chemistry
What chemical substance is in red cabbage which serves as an indicator for acids and bases?
May 28, 2012

world history
Can you tell me 3 ways that the conclusion of WW1 leads into directly into WW2? thank you.
May 27, 2012

PHYSICS PLEASE HELP
A particle travels counterclockwise around the origin at constant speed in a circular path that has a diameter of 2.50 m, going around twice per second. Point Q is on the path halfway between points P and R, which lie on the x axis and the y axis, respectively. State the ...
May 27, 2012

algebra
In a canoe race, a team paddles downstream 480 m. in 60 s. The same team travels up stream in 80 s. Find the team's rate in still water and the rate of the current. Please show how the equation is set up to solve
May 26, 2012

algebra
A jet travels at a rate of 798 mi/hr. with the wind. Going against the wind, the jet travels at a rate of 762 mi/hr. What is the rate of the jet in still air and the the rate of the wind? please show how the equation should be set up
May 26, 2012

ALGEBRA
Jim paddles a canoe upstream at a rate o 3mi/hr. Traveling downstream, he travels at 8 mi/hr. What is his rate in still water and what is the rate of the current? PLEASE SHOW THE SOLUTION EQUATION
May 26, 2012

math
5/10=3/5
May 26, 2012

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