Thursday
December 18, 2014

Posts by Liz


Total # Posts: 1,186

Chem
Nevermind, I think I understand it now. Thanks.
December 15, 2010

Chem
c) Ca (s) reacts and produces Co2(g) Can you explain to me why it's b please?
December 15, 2010

Chem
which of the following occurs when a sample of 0.1M HNO3 is tested? a) phenolphthalein turns pink b) bromthymol blue turns yellow c) Ca9s) reacts and produces CO2 (g) d) Na (s) reacts and rpoduces NO2 (g)
December 15, 2010

12th Grade Calculus
Find d^2y/dx^2 by implicit differentiation. x^(1/3) + y^(1/3) = 4 I know that first you must find the 1st derivative & for y prime I got 1/3x^(-2/3) + 1/3y^(-2/3) dy/dx = 0 Then for dy/dx I got dy/dx = [-1/3x^(-2/3)] / [1/3y^(-2/3)] I think that from here I would use the ...
December 14, 2010

english
The high rate of eating disorders in the United States is mainly attributed to social factors such as media, cultural influences, and family factors. My questions is should it be, The high rate of eating disorders in the United States IS/ARE mainly attributed?
December 10, 2010

math
Suppose two dice (one red, one green) are rolled. Consider the following events. A: the red die shows 5. B: the numbers add to 4. C: at least one of the numbers is 3. D: the numbers do not add to 10. Express the event "The numbers do not add to 4." in symbols. 1 B D ...
December 5, 2010

Probability
f two indistinguishable dice are rolled, what is the probability of the event {(3, 3), (2, 3), (5, 3)}? 1 What is the corresponding event for a pair of distinguishable dice? 2 {(3, 3), (2, 3), (5, 3)} {(3, 3), (2, 3), (5, 3), (3, 5), (3, 2)} {(3, 3), (2, 2), (5, 5), (3, 5), (3...
December 5, 2010

math probabilty
Find the (theoretical) probability of the given event, assuming that the coins are distinguishable and fair, and that what is observed are the faces uppermost. Six coins are tossed; the result is at most one head.
December 5, 2010

math
Complete the following probability distribution table and then calculate the stated probabilities. Outcome a b c d e Probability 0.1 1Your answer is correct. 0.43 0.1 0.27 (a) P({a, c, e}). 2Your answer is correct. (b) P(E ∪ F), where E = {a, c, e} and F = {b, c, e}, P(E...
December 4, 2010

Math Probability
Find the (theoretical) probability of a given event, assuming that the dice are distinguishable and fair, and that what is observed are numbers uppermost. Two dice are rolled; the numbers add to 7. 1
December 3, 2010

chemistry
A 1-L flask is filled with 1.45 g of argon at 25 degrees C. A sample of ethane vapor is added to the same flask until the total pressure is 1.35 atm. What is the partial pressure of argon in the flask?
December 2, 2010

math
3y=4/5
November 29, 2010

english
which of the following genres is defined by form rather than theme: tragedy, sonnet, comedy, satire, or drama.
November 23, 2010

geometry
what is the answer to this; Alvan said that if 2 triangles are not congruent, then at least one of the 3 sides of one triangle is not congruent to the corresponding side of the other triangle. do you agree with alvan? justify your answer.
November 21, 2010

PSY/202
The issue that discusses whether development is more a function of biology or more a function of the environment is the ______________ controversy.
November 14, 2010

chemistry
I'm thinking Gd (element 64).
November 9, 2010

math
A poker hand consists of five cards from a standard deck of 52. Find the number of different poker hands of three of a kind (three of one denomination, one of another denomination, and one of a third). 1
November 7, 2010

math
A bag contains 3 red marbles, 2 green ones, 1 lavender one, 2 yellows, and 4 orange marbles. How many sets of four marbles include all the red ones? 1Your answer is incorrect.
November 7, 2010

english
help me find subjects and verbs in college sentences
November 6, 2010

chemistry
Find velocity of electron emitted by metal whose threshold frequency is 2.1*10^14 and when exposed to visible light wavelength of 5.09*10^-7
November 3, 2010

physics
Funny, I just got to this problem in my physics homework. Use the Conservation of angular momentum idea, L=Iw. You can find this with your given initial values. Then, you use that L in a new equation, except with the I final and w final (which you want to ultimately find). Use...
October 29, 2010

math
Alohaaaaaa
October 27, 2010

bus math
Meg's pension plan is an annuity with a guaranteed return of 7% interest per year (compounded monthly). She would like to retire with a pension of $20000 per month for 20 years. If she works 28 years before retiring, how much money must she and her employer deposit per ...
October 27, 2010

bus math
Determine the selling price of a 15-year, 4.725% bond, with $1000 maturity value, with a yield of 4.735%. (Assume twice-yearly interest payments. Round your answer to the nearest cent.)
October 27, 2010

psy
Cathy owes six overdue movies to her local video store. Since each of Cathy’s overdue videos is a comedy, only comedies are currently overdue at Cathy’s local video store. Which one of the following premises, if added to the statements above, would allow the ...
October 25, 2010

physics
where does the 4.9 come from?
October 24, 2010

Math Approximation fractions
I really don't understand how to determine which number is greater and which one is smaller can anyone help auorlda ?
October 23, 2010

PHYSICS ---HELP!
A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 6.2×10−5 rad. What diameter spot will it make on the Moon? Express your answer using two significant figures.
October 18, 2010

math
Urban Community College is planning to offer courses in Finite Math, Applied Calculus, and Computer Methods. Each section of Finite Math has 40 students and earns the college $40,000 in revenue. Each section of Applied Calculus has 40 students and earns the college $60,000, ...
October 16, 2010

math
Find the intersection of the line through (0, 1) and (4.4, 2) and the line through (1.9, 3) and (5.3, 0). (Round your answers to the nearest tenth.) (x, y) =
October 16, 2010

math
You operate a gaming Web site, where users must pay a small fee to log on. When you charged $4 the demand was 510 log-ons per month. When you lowered the price to $3.50, the demand increased to 765 log-ons per month. (a) Construct a linear demand function for your web site and...
October 16, 2010

physics
A horizontal force of 20 N acted on a 10 kg mass at rest. The force accelerated the mass over a rough surface so that the mass had a speed of 6.0 m/s after 5.0 seconds. How much friction was acting on the mass?
October 15, 2010

precalculus
Find the dimensions of a square cardboard box (open top) that holds 100 cubic inches and is 4 inches deep?
October 14, 2010

college pre-calc
how do you know if there are holes in a rational function?
October 13, 2010

Physics Help!!
Three identical masses of 500 kg each are placed on the x axis. One mass is at x_1 = -11.0 cm, one is at the origin, and one is at x_2 = 37.0 cm. What is the magnitude of the net gravitational force F_grav on the mass at the origin due to the other two masses? Take the ...
October 11, 2010

physics
a patrol of timing paths each vehicle needs to travel the first half of the distance at a speed of 140 km / h. if the speed limit is 80km / h. which should be the highest average speed of the car in the second half of the section, to avoid being fined?
October 10, 2010

physics
a car crosses the street ABC. the segment AB = average speed of 60km / h for 2 hours, the length BC = average speed of 90km / h for 1 h. the average speed of car travel in AC is? the route is a straight line
October 10, 2010

business math
How long, to the nearest year, will it take an investment to triple if it is continuously compounded at 16% per year?
October 9, 2010

math
After several drinks, a person has a blood alcohol level of 200 mg/dL (milligrams per deciliter). If the amount of alcohol in the blood decays exponentially, with one fourth being removed every hour, find the person's blood alcohol level after 2 hours.
October 9, 2010

math
A bacteria culture starts with 1,000 bacteria and doubles in size every 2 hours. Find an exponential model for the size of the culture as a function of time t in hours. f(t) = 1
October 9, 2010

Physics Help!!
Suppose the kinetic energy of an object moving is 15 J and the potential energy is 25 J at some point in time. Then I measure the potential energy some time later and find it to be 10 J. What is the new kinetic energy?
October 8, 2010

chemistry
I think I'm doing the same lab as you. So what I did was find the new concentration of nitric acid in the solution (because by adding it to water, you've just diluted ur concentration). I got .167. Since nitric acid is a strong acid, it dissociates completely, right? ...
October 8, 2010

college
f(x) = 4 e**(5 x); f(x)=A b**x
October 8, 2010

math
After several drinks, a person has a blood alcohol level of 200 mg/dL (milligrams per deciliter). If the amount of alcohol in the blood decays exponentially, with one fourth being removed every hour, find the person's blood alcohol level after 2 hours.
October 8, 2010

math
After several drinks, a person has a blood alcohol level of 200 mg/dL (milligrams per deciliter). If the amount of alcohol in the blood decays exponentially, with one fourth being removed every hour, find the person's blood alcohol level after 2 hours.
October 7, 2010

math
if AX= kX k belongs to real numbers A=|4 -2| X=|x| |-2 4| |y| and x is not equal to cero, and cero is not equal to y, find k
October 7, 2010

physics
if AX = kX, k belongs to reals where A=|4 -2| <-(is a matrix) X=|x|<-(matrix) |-2 4| |y| and x is not equal to cero, cero is not equal to y, find k
October 7, 2010

math
Use exponential regression to model the price P(t) as a function of time t since 1994. Include a sketch of the points and the regression curve. (Round the coefficients to 3 decimal places.)
October 7, 2010

math
After several drinks, a person has a blood alcohol level of 200 mg/dL (milligrams per deciliter). If the amount of alcohol in the blood decays exponentially, with one fourth being removed every hour, find the person's blood alcohol level after 2 hours.
October 7, 2010

physics
for example of the stone dropped from a ballon and striking the ground and taking into account air resistance sketch a) a distance-time graph b) a velocity-time graph c)an acceleration-time graph
October 7, 2010

math
Find equations for exponential functions that pass through the given pair of points. (Round all coefficients to 4 decimal places if necessary.) (-2, 3) and (3, 4)
October 7, 2010

math
After several drinks, a person has a blood alcohol level of 200 mg/dL (milligrams per deciliter). If the amount of alcohol in the blood decays exponentially, with one fourth being removed every hour, find the person's blood alcohol level after 2 hours.
October 7, 2010

math
A bacteria culture starts with 1,000 bacteria and doubles in size every 2 hours. Find an exponential model for the size of the culture as a function of time t in hours.
October 7, 2010

math
Obtain exponential functions in the form f(t) = Aert, if f(t) is the value after t years of a $9,000 investment depreciating continuously at an annual rate of 8.5%. f(t) = 1
October 7, 2010

physics! center of mass
a long non uniform board of length 8 m and mass m = 12 kg is suspended by two ropes if the tensions in the ropes are mg/3 (on left) and 2mg/3 (on right) what is the location of the board's center of mass thank you!
October 7, 2010

physics! center of mass
a long non uniform board of length 8 m and mass m = 12 kg is suspended by two ropes if the tensions in the ropes are mg/3 (on left) and 2mg/3 (on right) what is the location of the board's center of mass thank you!
October 7, 2010

langauge arts
PASSAGE: How did one village bring disaster on itself? On a morning in early spring, 1873, the people of Oberfest left their houses and took refuge in the town hall. No one knows why precisely. A number of rumors had raced through the town during recent weeks, were passed on ...
October 4, 2010

chemistry(FSU)
3 is right! Thank you!! But how'd you get the answer?
October 2, 2010

Math
Im still confused. Wouldnt each side just be 0.33 m then?
September 20, 2010

Math
How would i determine that with only one value?
September 20, 2010

Math
The corners of a square lie on a circle of diameter 0.33 m. Each side of the square has length L. Find L.
September 20, 2010

PHI103: Informal Logic
eating candy will help his daughter improve in areas other than math
September 17, 2010

PHI103: Informal Logic
Barney’s lawsuit against Pinetree Café is unwarranted.
September 17, 2010

math
17 + 1 = 9(s) solve for s 18 = 9(s) s = 2
September 14, 2010

math
what do you divide 83 and 100 with to get to 5/6
September 14, 2010

business hs
positive attitude manners
September 14, 2010

English fallacies
my assignment is to find quotes from thimas jefferson's query 14 and label them according to fallacies and i just dont get it. some quotes include "Comparing them by their faculties of memory, reason, and imagination, it appears to me, that in memory they are equal to...
September 9, 2010

Medical Billing and Coding
Ok thank you This is what I had wrote: Healthcare, as it exists today, is an ever escalating, competitive process whereby providers and institutions thrive financially. If universal health care coverage were made available to all people, the competition among the providers and...
August 29, 2010

Medical Billing and Coding
Explain why the lack of universal health care coverage can raise health care costs.
August 29, 2010

Medical Billing and Coding
I have found the answer thank you to all who helped
August 27, 2010

Medical Billing and Coding
The investigational new drug (IND) application contains which of the following information?
August 27, 2010

12th grade - Math
Explain. 1.) To solve x(x-5)=0 either factor may be equal to zero. 2.) | 8-15i | = 17 3.) The solution for x^2 = -2 cannot be found graphically. [any help or explanation is greatly appreciated]
August 26, 2010

12th grade - Math
Identify the system as consistent, inconsistent or dependent. Explain your choice. 1.) 3x - 2y = 12 6x - 4y = 24 2.) x= -5 y= 4
August 26, 2010

physics
A unit of area often used in measuring land areas is the hectare, defined as 104 m2. An open-pit coal mine consumes 72 hectares of land, down to a depth of 29 m, each year. What volume of earth, in cubic kilometers, is removed in this time?
August 25, 2010

Math
Solve for the indicated variable p I don't know what you do to solve it. A=P+Prt
August 24, 2010

Physics - Uniform circular motion
centripetal acceleration? v^2 / r = ac
August 21, 2010

physics
I actually used that formula and got that answer (35.625 m/s) but does that take into account the speed of the police car? (or is that a red herring)
August 21, 2010

physics
A speeding car is pulling away from a police car. The police car is moving at 30 m/s. The radar gun in the police car emits an electromagnetic wave with a frequency of 20.0 x 10^9 Hz. The wave reflects from the speeding car and returns to the police car where the frequency is ...
August 21, 2010

Physics
A 8.1 kg stone is at rest on a spring. The spring is compressed 12 cm by the stone. The stone is then pushed down an additional 27 cm and released. To what maximum height (in cm) does the stone rise from that position?
August 19, 2010

algebra
Substitute -21 into -x, which gives you -(-21). Two negatives make a positive, therefore -x = 21.
August 19, 2010

math
14 to 49
August 17, 2010

hca/210
What do you see as the purpose of health insurance? Should there be limits on the amount of health care provided? Word count met? If yes, what criteria should we use to ration health care? If no, how should health care be financed so that everyone has access?
August 4, 2010

writing call
In what ways are full-sentence outlines more beneficial than topic outlines? o Explain why it may or may not be simpler to write your paper instead of first creating a full-sentence outline. o What steps will you take to turn your outline into the body of your rough draft?
August 3, 2010

university of phoenix
I need to write a paper on the immigration law SB1070 in one week.
August 3, 2010

essay
I need to see if the paragraph I wrote is Ok?
July 21, 2010

chemistry
An enclosed cylinder has 3 moles of gas with a volume of 60 L and a temperature of 400 K. What is the pressure inside the container? Round to the nearest tenth. Don't forget the units.
July 4, 2010

Chemisrty
If you were balancing a chemical equation that contained the substance sodium nitrate, NaNO3, composed of a sodium ion, Na+1, and a nitrate ion, (NO3)-1, what number or numbers could you change in order to balance the equation?
June 30, 2010

math
Find the measure of angle DBC if the measure of angle ABD is 36 degrees and the measure of angle ABC is 74 degrees.
June 28, 2010

Chemistry
Fe + 2HCl = FeCl2 + H2 A piece of metallic iron (10 moles) was dissolved in concentrated hydrochloric acid. The reaction formed hydrogen gas and iron chloride. How many grams of HCl were consumed? Don't forget the units.
June 27, 2010

Government
#1 is c.) socialism, communisn
June 20, 2010

geometry
Find the Pythagorean triple for m = 14
June 18, 2010

healthcare
list and describe the four steps necessary to establish the proper ICD-9-CM code.
June 17, 2010

proviso
how many grams of Fe2O3 are formed when 16.7g of Fe reacts completely with oxygen?
June 14, 2010

question
who gets to decide if you go to summer school?
June 13, 2010

SOCIAL STUDIES! EMERGENY! HELP NEEDED!
Trade between the two countries is relatively modest when compared to trade with their immediate continental neighbours, but still significant. France is Canada's seventh largest trading partner overall, and the third largest in Europe. Annual bilateral trade between the ...
June 3, 2010

nutrition
If you have ever poured oil into a glass of water, you have seen that these two substances do not mix. Knowing this, how do lipids move through the body so they can be digested and absorbed?
June 1, 2010

statistics
Consider a study in which the population variance estimate based on treatment group of 14 participants is 8, and the population variance estimate based on a control group of 17 individuals is 9. Compute the pooled estimate of population variance.
May 31, 2010

health
Neurology : It organizes the information The nervous system controls all body functions. It receives information from inside and outside the body and then sends out messages to appropriate organs in the body in response to this information. The organs of the body that receive...
May 30, 2010

Biology
It can all so be called Genetic Inheritance I think this is better and shorter
May 30, 2010

Biology
All humans and many other primates can be typed for the ABO blood group. There are four principal types: A, B, AB, and O. There are two antigens and two antibodies that are mostly responsible for the ABO types. The specific combination of these four components determines an ...
May 30, 2010

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