Wednesday
August 20, 2014

Posts by vanessa


Total # Posts: 699

Statistics PLEASE HELP ME!
Collina’s Italian Café in Houston, Texas, advertises that carryout orders take about 25 minutes (Collina’s website, February 27, 2008). Assume that the time required for a carryout order to be ready for customer pickup has an exponential distribution with a ...
April 7, 2014

Economic/Statistics
Collina’s Italian Café in Houston, Texas, advertises that carryout orders take about 25 minutes (Collina’s website, February 27, 2008). Assume that the time required for a carryout order to be ready for customer pickup has an exponential distribution with a ...
April 7, 2014

statistics
Collina’s Italian Café in Houston, Texas, advertises that carryout orders take about 25 minutes (Collina’s website, February 27, 2008). Assume that the time required for a carryout order to be ready for customer pickup has an exponential distribution with a ...
April 7, 2014

Math
Thanks for the help.
April 7, 2014

Math
This is what I got too, but it says that my answer is wrong.
April 7, 2014

Math
The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
April 7, 2014

Math
ok I got now. Thank you so much for your help, I appreciate it.
April 7, 2014

Math
I got t=70 and it still says it is wrong.
April 7, 2014

Math
This is what I got and it says it is wrong. Can you tell me what I'm doing wrong please? Thanks Q(t) = 200(.5)^(.0704t) Q '(t) = (200/14.2) (.5)^(t/14.2) so when t = 21.5 Q ' (t) = (200/14.2) (.5)^(21.5/14.2) = 4.931 g/day
April 7, 2014

Math
Phosphorus-32 (P-32) has a half-life of 14.2 days. If 200 g of this substance are present initially, find the amount Q(t) present after t days. (Round your growth constant to four decimal places.) How fast is the P-32 decaying when t = 21.5? (Round your answer to three decimal...
April 7, 2014

Math
The length (in centimeters) of a typical Pacific halibut t years old is approximately f(t) = 190(1 − 0.955e−0.25t). (b) How fast is the length of a typical 9-year-old Pacific halibut increasing? cm/yr (c) What is the maximum length a typical Pacific halibut can ...
April 7, 2014

math
The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
April 7, 2014

math
The length (in centimeters) of a typical Pacific halibut t years old is approximately. (b) How fast is the length of a typical 9-year-old Pacific halibut increasing? (c) What is the maximum length a typical Pacific halibut can attain?
April 7, 2014

math
Phosphorus-32 (P-32) has a half-life of 14.2 days. If 200 g of this substance are present initially, find the amount Q(t) present after t days. (Round your growth constant to four decimal places.) How fast is the P-32 decaying when t = 21.5? (Round your answer to three decimal...
April 7, 2014

statistics
Assume a binomial probability distribution has p = .60 and n = 200. c. What is the probability of 100 to 110 successes (to 4 decimals)? d. What is the probability of 130 or more successes (to 4 decimals)?
April 7, 2014

statistics
Given that z is a standard normal random variable, compute the following probabilities (to 4 decimals). P(z -1.0) P(z -1.0) P(z -1.5) P(z -2.5) P(-3 < z 0)
April 7, 2014

statistics
Collina’s Italian Café in Houston, Texas, advertises that carryout orders take about 25 minutes (Collina’s website, February 27, 2008). Assume that the time required for a carryout order to be ready for customer pickup has an exponential distribution with a ...
April 7, 2014

statistics
Collina’s Italian Café in Houston, Texas, advertises that carryout orders take about 25 minutes (Collina’s website, February 27, 2008). Assume that the time required for a carryout order to be ready for customer pickup has an exponential distribution with a ...
April 6, 2014

statistics
Given that z is a standard normal random variable, compute the following probabilities (to 4 decimals). P(z -1.0) P(z -1.0) P(z -1.5) P(z -2.5) P(-3 < z 0)
April 6, 2014

statistics
Assume a binomial probability distribution has p = .60 and n = 200. c. What is the probability of 100 to 110 successes (to 4 decimals)? d. What is the probability of 130 or more successes (to 4 decimals)?
April 6, 2014

Math
The growth rate of Escherichia coli, a common bacterium found in the human intestine, is proportional to its size. Under ideal laboratory conditions, when this bacterium is grown in a nutrient broth medium, the number of cells in a culture doubles approximately every 30 min. (...
April 6, 2014

Math
Phosphorus-32 (P-32) has a half-life of 14.2 days. If 200 g of this substance are present initially, find the amount Q(t) present after t days. (Round your growth constant to four decimal places.) How fast is the P-32 decaying when t = 21.5? (Round your answer to three decimal...
April 6, 2014

Math
The length (in centimeters) of a typical Pacific halibut t years old is approximately. (b) How fast is the length of a typical 9-year-old Pacific halibut increasing? (c) What is the maximum length a typical Pacific halibut can attain?
April 6, 2014

Math
A radioactive substance decays according to the formula Q(t) = Q0e−kt where Q(t) denotes the amount of the substance present at time t (measured in years), Q0 denotes the amount of the substance present initially, and k (a positive constant) is the decay constant. (a) ...
April 6, 2014

Math
The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
April 6, 2014

Math
During a flu epidemic, the number of children in the Woodbridge Community School System who contracted influenza after t days was given by the following. Q(t) = 7000/1+249 e−0.6 t (b) How many children had the flu after 10 days?
April 6, 2014

statistics
Given that z is a standard normal random variable, compute the following probabilities (to 4 decimals). P(z -1.0) P(z -1.0) P(z -1.5) P(z -2.5) P(-3 < z 0)
April 5, 2014

statistics
Assume a binomial probability distribution has p = .60 and n = 200. a)What are the mean and standard deviation (to 2 decimals)? b)Why can the normal probability distribution be used to approximate this binomial distribution? c)What is the probability of 100 to 110 successes (...
April 5, 2014

statistics
Collina’s Italian Café in Houston, Texas, advertises that carryout orders take about 25 minutes (Collina’s website, February 27, 2008). Assume that the time required for a carryout order to be ready for customer pickup has an exponential distribution with a ...
April 5, 2014

Math
A radioactive substance decays according to the formula Q(t) = Q0e−kt where Q(t) denotes the amount of the substance present at time t (measured in years), Q0 denotes the amount of the substance present initially, and k (a positive constant) is the decay constant. (a) ...
April 5, 2014

Math
During a flu epidemic, the number of children in the Woodbridge Community School System who contracted influenza after t days was given by the following. Q(t) = 7000 1+249 e−0.6 t (a) How many children were stricken by the flu after the first day? (b) How many children ...
April 5, 2014

Math
The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
April 5, 2014

Math
The length (in centimeters) of a typical Pacific halibut t years old is approximately f(t) = 190(1 − 0.955e−0.25t). How fast is the length of a typical 9-year-old Pacific halibut increasing? ? cm/yr (c) What is the maximum length a typical Pacific halibut can ...
April 5, 2014

Math
The growth rate of Escherichia coli, a common bacterium found in the human intestine, is proportional to its size. Under ideal laboratory conditions, when this bacterium is grown in a nutrient broth medium, the number of cells in a culture doubles approximately every 30 min. (...
April 5, 2014

math
Phosphorus-32 (P-32) has a half-life of 14.2 days. If 200 g of this substance are present initially, find the amount Q(t) present after t days. (Round your growth constant to four decimal places.) How fast is the P-32 decaying when t = 21.5? (Round your answer to three decimal...
April 5, 2014

Math
Skeletal remains had lost 84% of the C-14 they originally contained. Determine the approximate age of the bones. (Assume the half life of carbon-14 is 5730 years. Round your answer to the nearest whole number.)
April 5, 2014

Global Studies
I was also thinking c?
March 12, 2014

Global Studies
Which of the following minerals generates the most income for British Columbia? A. lead B. zinc c. Gold d. Copper <<< One reason many British Columbians feel a link to the countries of the Pacific Rim is because more than 15% have ____ancestors. a. Hawaiian <<&...
March 12, 2014

algebra
Hoe can I solve this by using elimination method.?? 5y+2x=5x+1 3x-2y=3+3y
February 10, 2014

science
please help someone fast !!!
December 19, 2013

science
Describe how the Triassic period was a transitional time period during the Mesozoic era. Explain why the boundary between the Triassic and Jurassic periods is similar to the boundary between the Permian and Triassic periods.
December 19, 2013

science
2. Describe the two most important events in the history of animal life that occurred at the beginning and at the end of the Paleozoic era. List and briefly outline the six different periods into which the Paleozoic era is divided. so i cannot find it in my notes, and im ...
December 19, 2013

Math
Write a unit rate 250 miles for 20 miles
November 22, 2013

MATH HELP
write the equations of two different parabolas whose vertices are at (3,2).
November 13, 2013

algebra
how do you solve x+y=2?
November 13, 2013

Chemistry
Measuring the conductivity of an aqueous solution in which 0.0200 mol CH3COOH has been dissolved in 1.00 L of solution shows that 2.96 % of acetic acid molecules have ionized to CH3COO- ions and H3O+ ions. Calculate the equilibrium constant for ionization of acetic acid and ...
November 12, 2013

Algerbra
Divide (x^6-13x^3+42)/(x^3-7) Please show me how to work the problem
October 30, 2013

biology
thanks so much for the article
October 30, 2013

biology
If a person with Down syndrome marries a person without Down syndrome, is it possible for their child not to have Down syndrome? I assume that there is a 50% chance that they could have a child that will not have down syndrome. Is this correct?
October 30, 2013

grade 11 biology
Consider a germ cell of a person with Down syndrome(Trisomy 21). Explain what is happening with the arrangement of chromosome 21 inside the cell during interphase 1, Anaphase 1, Telophase 1, telophase 11. Please help, I am really stuck on this. Thank you
October 30, 2013

physics
The total volume of a new house is 800 m3. Before the heat is turned on, the air temperature inside is 10°C, and the relative humidity is 50%. After the air is warmed to 20°C, how much water vapor must be added to the air to make the relative humidity 50%? m = kg
October 24, 2013

Math
log a = 2 Find the vaule of A
October 21, 2013

biology
Stuck on this question. When infected by the Hepatitis B virus (HBV), many patients experience flu-like symptoms such as fever, loss of appetite, nausea, vomiting, and malaise. This is called acute hepatitis. During this stage, what is the HBV doing? What do you call this ...
October 19, 2013

biology
Hi there, Not sure the answer for this question. In what way is endospores stronger than bacterial cell?
October 18, 2013

alegbra
Use linear combinations to solve these systems. 5r-3s=12 3r+55=28
October 13, 2013

Math
A house cost $85,000. The price of the house will raise 5% each year. If the price actually rise at that rate, what will the price, P, of the house equal in y years. a. Make a table for 5 years B. Explain how you calculated the price c. What number do you need to use if you ...
October 7, 2013

Physics
As a train approaches the city it sees a stalled car on the tracks. The train slams on its brakes going from 25 m/s to rest in 30 s. How far away was the stalled car when the train conductor slammed on the brakes?
September 30, 2013

math
i need help to solve this 0.3(0.3x+0.8<-0.3
September 30, 2013

Answers check and help!
d. Calculate the mean square for 1) gender, 2) marital status, 3) interaction between gender and marital status, and 4) error or within variance. e. Calculate the F ratio for 1) gender, 2) marital status, and 3) interaction between gender and marital status. f. Identify the ...
September 24, 2013

Analyzing with ANOVA
Submit your answers to the following questions using the ANOVA source table below. The table depicts a two-way ANOVA in which gender has two groups (male and female), marital status has three groups (married, single never married, divorced), and the means refer to happiness ...
September 23, 2013

Psychological stats
Post a null hypothesis that would use a t test statistical analysis.. Use the same hypothetical situation taken in the t test hypothesis, and turn it into a null hypothesis using a one-way ANOVA analysis and a two-way ANOVA.
September 20, 2013

Psychological stats
I need help with a unique null hypothesis that I would then be able to use a t test statistical analysis,the same hypothetical situation taken in the t test hypothesis, and turn it into a null hypothesis using a one-way ANOVA analysis and a two-way ANOVA. I understand null and...
September 20, 2013

Language and Other Barriers
I do not think (a) is the right answer. That would be a good quality to have, but (c) speak another language- is the right answer. Think about it, if your an esl teacher and you only know English, how do you teach the class that doesn't understand you? And I know (d) and (...
September 20, 2013

Chemistry
Calculates the work done (in joules) when 42.8 g of tin dissolves in excess acid at 1.10 atm and 23 degrees Celcius. Assume ideal gas behaviour.
September 19, 2013

Chemistry
Calculates the work done (in joules) when 42.8 g of tin dissolves in excess acid at 1.10 atm and 23 degrees Celcius. Assume ideal gas behaviour.
September 19, 2013

Gr 11 Math
(√x^4)(√x) "√" is a radical sign. does it equal √√x^5
September 17, 2013

Gr11 Math
5^-4 - 5^-6/5^-3 +5^-5 i got 24/26, simplified would be 12/13. Am i correct?
September 17, 2013

Psy
Suggest one psychological research question that could be answered by each of the following types of statistical tests: •z test •t test for independent samples, and •t test for dependent samples
September 13, 2013

english grade 12
i know confusing. its a video called part of our heritage- Canada. The video display native Indians and French explorers. The native tells them to come to their village to talk and they interpret that village is called Canada and that is how we got our name Canada.
September 12, 2013

english grade 12
i'm to make an note making frame work which includes main idea and examples or supporting ideas or key words. the video is naming canada. Main Idea: Discovering our nation Canada 1. Native language Kanata was translated as our nation country name. 2. The native invited ...
September 12, 2013

english
thank you so much
September 12, 2013

english
So I dont know how to word that one. Should I just omit the trees?
September 12, 2013

english
I am to identify 3 words or phrases in the Canada anthem and explain. Verse one: 1. True North Strong and Free - this phrase expresses hope and freedom of choice, speech and beliefs. 2. with Glowing hearts - this phrase describes the love and pride for our country 3. We stand ...
September 12, 2013

business law
If Sally's employer subjects her to more severe discipline for an act of misconduct than a similarly situated fellow employee not in her protected group for the same act of misconduct, Sally may have a claim for disparate treatment discrimination. true or false
August 31, 2013

trig
u = (9, 2) v = (-5, -2) 2u - 3v = ?
August 28, 2013

geometry
postulates are assumed to be true and we need not prove them. They provide the starting point for the proof of a theorem. A theorem is a proposition that can be deduced from postulates. We make a series of logical arguments using these postulates to prove a theorem.
August 27, 2013

human physiology
B) the amount of substrate for the enzyme to act upon is very low
August 27, 2013

World History
What are the errors? I thought it was okay..
August 17, 2013

World History
City-States Essay Assignment In what ways were the Indus Valley people an advanced civilization? In what ways did their civilization compare to an advanced modern civilization today? How is this? The Indus Valley people had great architectures. The yearly floods that the Indus...
August 17, 2013

English
Well, I'M SORRY! Excuse me. I don't use the words in the bible in my vocabulary! I don't say "He shall not goeth to the park." I say "can't go to the park." Thanks anyways!
August 17, 2013

English
I've finish it! I believe it's done. I checked/fixed the mistakes. Check once last time? Thanks. To whom it may concern, A very great friend of mine began writing a children's Bible, and now just finished it. He wanted to write a children's Bible to help kids, ...
August 17, 2013

English
Hey. I rewrote and fixed a lot of it and want you to check what I have so far! To whom it may concern, A very great friend of mine began writing a Children's Bible, and now just finished it. He wanted to write a Children's Bible to help kids, even new Christians ...
August 17, 2013

English
You don't have to help me.I was writing on what I believe in.Are you Christian? I'll just write about something else!
August 17, 2013

English
-______- Can you tell me what my errors were?
August 17, 2013

English
Imagine that you are an agent who is interested in publishing new authors. Choose any book you like and present the book to a publisher in New York. How's this; To whom it may concern, A very great friend of mine decided to begin writing the bible for kids. He just ...
August 17, 2013

Chemistry
I knew it! :) Thanks!!
August 17, 2013

Chemistry
What's the correct empirical formula for CO2?
August 17, 2013

English
I need help. Please and thank you. 4. What does a strong verb add to a sentence? 5. What does a quality adjective add to a sentence?
August 16, 2013

Geometry
Thatsall thats on the problem
August 15, 2013

Geometry
Help. PT=5x+3 and TQ=7x-9 Find the value of PT
August 15, 2013

GeometryHelp
Yeahh. Thanks!
August 14, 2013

GeometryHelp
Rs=8y+4 ST=4y+8 RT=15y-9 A. What is the value of y. B. What is Rs, ST, RT
August 14, 2013

GeometryHelp
Compare and Contrast Describe the difference between saying that two segments are congruent and saying that two segments have equal length. I need help with the below question. When would you use each phrase?
August 14, 2013

World History
In what ways were the Indus Valley people an advanced civilization
August 14, 2013

Geometry MATH CHECK
Check? In your own words, explain why we use the formula AB = |a - b| to find the distance of a segment. Include why you need to subtract and why you need to take the absolute value. We use that formula |a-b| because a and b are representing coodinate numbers you need to ...
August 14, 2013

Geometry
I got y=-17 Am I right?
August 14, 2013

Geometry
I'm sorry rt=15 not 115
August 14, 2013

Geometry
How'd you get that? I was trying the problem and couldn't get it
August 14, 2013

Geometry
How would you do this? Rs=8y St=4y+8 RT=115y-9 a.Find the value of y b. Find rs, st, rt
August 14, 2013

Geometry
Help? 1. In your own words, explain why we use the formula AB = |a - b| to find the distance of a segment. Include why you need to subtract and why you need to take the absolute value. 2. Compare and Contrast Describe the difference between saying that two segments are ...
August 14, 2013

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