Saturday
November 22, 2014

Posts by tracy


Total # Posts: 756

math
a city is served by two newspapers-the Tribune and the Daily News. Each Sunday a reader purchases one of the newspapers at a stand. The following transition matrix contains the probabilities of a customers buying a particular newspaper in a week given the newspaper purchased ...
November 14, 2014

Algebra please help out
In each bouquet of flowers, there are 4 roses and 6 white carnations. Complete the 4 and 6 table to find out how many roses and carnations there are in 4 bouquets of flowers? Please help answer
October 29, 2014

Algebra
Please help out thx
October 28, 2014

Algebra
Write 3 ratios equivalent to the ratio of boys to girls on the bus is 20/15? Please help answer
October 28, 2014

Limits
Lim of [1/(3+x)]-(1/3)/x as x approaches 0 is?
September 14, 2014

math
Rainfall for September in Fiji averages 11" according to World Travel Guide. This year it rained 3% less. How many inches did it rain this year? (Round to the nearest tenth.)
September 8, 2014

Newtons Law of Cooling
using Newton's Law of Cooling: At 10:30 am the medical examiner arrives at a crime scene where a dead body has been found. The temperature of the body is 80 degrees F and the thermostat for the room in which the body was found is set at 68 degrees F. One hour later the ...
September 4, 2014

physics
Jack drops a stone from rest off of the top of a bridge that is 24.4 m above the ground. After the stone falls 6.6 m, Jill throws a second stone straight down. Both rocks hit the water at the exact same time. What was the initial velocity of Jill's rock? Assume upward is ...
August 30, 2014

Accounting
On October 10, 2010, Mason Engineering Company completed negotiations on a contract for the purchase of new equipment. Under the terms of the agreement, the equipment may be purchased now or Mason may wait until January 10, 2011, to make the purchase. The cost of the equipment...
August 13, 2014

business
describe scenarios that depicts the different ways to manage business commerce
June 8, 2014

Delcambre High
a trail mix recipe calls for 1/3 pound of mixed nuts, 4/15 pound of raisins and 2/5 pounds of granola. What is the ratio of raisins to mixed nuts in simplest form?
June 4, 2014

POL201
The tendency of Congress to defer to the President in foreign policy has at times led to
May 16, 2014

Algebra
factoring 18z+45+z^2
May 6, 2014

Algebra
Factoring 9w-w^3
April 30, 2014

math
Evidence of an increased risk of lung cancer associated with cigarette smoking was sought by Doll and Hill. In one study, 649 lung cancer cases were matched by age, and gender to 649 controls; 647 of the cases and 622 of the control had a history of smoking cigarettes. a. Name...
April 28, 2014

epidemiology
In another study, the smoking habits of 34,445 male physicians were obtained by mailed questionnaires. Deaths among these physicians over the subsequent years were identified though contact with the office of the Registrar General. The death rates from lung cancer of these ...
April 27, 2014

epidemiology
In another study, the smoking habits of 34,445 male physicians were obtained by mailed questionnaires. Deaths among these physicians over the subsequent years were identified though contact with the office of the Registrar General. The death rates from lung cancer of these ...
April 27, 2014

Epidemiology
Evidence of an increased risk of lung cancer associated with cigarette smoking was sought by Doll and Hill. In one study, 649 lung cancer cases were matched by age, and gender to 649 controls; 647 of the cases and 622 of the control had a history of smoking cigarettes. a. Name...
April 27, 2014

Algebra
5670 compounded annually at a 3.5 interest rate once a year yields what in interest
April 25, 2014

Algebra
P=A (1+r)6 -n P=2000 (1+0.05) ^-n P=2000 (1.05)^ -12 =?
April 24, 2014

Algebra
You did not give an answer
April 24, 2014

Algebra
2000/1.05^12
April 24, 2014

STATS
Suppose we are testing the null hypothesis H0: ì = 20 and the alternative Ha: ì 20, for a normal population with ó = 5. A random sample of 25 observations are drawn from the population, and we find the sample mean of these observations is = 17.6. The P-...
April 5, 2014

Stats
Damon, thank you!
March 29, 2014

Stats
Assume that event A occurs with probability 0.4 and event B occurs with probability 0.5. Assume that A and B are disjoint events. The probability that either event occurs (A or B) is A. 0.0 B. 0.7 C. 0.9 D. 1.0.
March 29, 2014

Stats
These are my options. A.0.30 B.0.40 C.0.60 D.0.90
March 29, 2014

Stats
I added the mean of 21 and SD of 10 and the probability is 0.9715. That is not one of my options, please help!
March 29, 2014

Stats
The high temperature X (in degrees Fahrenheit) on January days in Columbus, Ohio varies according to the Normal distribution with mean 21 and standard deviation 10. The value of P(X < 10) is
March 29, 2014

Stats
Let the random variable X be a random number with the uniform density curve given below. P(0.6 < X < 0.9) is
March 29, 2014

Statistics
Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ score separating the top 37% from the others. Answer in one decimal place.
March 28, 2014

Chemistry
What is the enthalpy change if 25.0 g of methane are burned? 890kJ of heat released for every mole of methane that reacts. CH4 + 2O2 = CO2 + 2H2O
March 18, 2014

Stats
4. A least squares regression line to predict a student’s Stat145 test score (from 0-to-100) from the number of hours studied was determined from a class of 55 Stat145 students: ̂ = 48.2 + 2.21x. One student in the class studied for 18 hours and scored 82 on the exam...
March 7, 2014

Statistics
Thank you! :)
February 25, 2014

Statistics
In a study, nine tires of a particular brand were driven on a track under identical conditions. Each tire was driven a particular controlled distance (measured in thousands of miles), and afterward the tread depth was measured. Tread depth is measured in “mils.” Here...
February 25, 2014

STAT - Please check answer
In a study, nine tires of a particular brand were driven on a track under identical conditions. Each tire was driven a particular controlled distance (measured in thousands of miles), and afterward the tread depth was measured. Tread depth is measured in “mils.” Here...
February 24, 2014

Math
Archaeologists often find only parts of ancient human remains. For example, they may find a small finger bone, called the metacarpal bone. Is it possible to predict the height of a human from the length of his or her metacarpal bone? To investigate, a researcher measures the ...
February 20, 2014

STATS
Is the answer C?
February 20, 2014

STATS
So B is not the correct answer?
February 20, 2014

STATS
Archaeologists often find only parts of ancient human remains. For example, they may find a small finger bone, called the metacarpal bone. Is it possible to predict the height of a human from the length of his or her metacarpal bone? To investigate, a researcher measures the ...
February 20, 2014

algebra & trigonometry
One number x. So, the other number: 210 – x. According to the given condition, x^2 = 210 – x, ox^2 + x – 210 = 0, or (x + 15) (x – 14) = 0, or x = –15 or 14. Therefore, one number is either –15 or 14 and the other number is either (210 + 15) = 225...
February 11, 2014

STATS
Suppose that the average weight of students in a statistics class is 75.5 kilograms with a standard deviation of 10.3 kilograms. Using the 68-95-99.7 rule, what is the lower bound for the weight of the top 2.5% of students?
February 11, 2014

STATS
Yes! Thanks. :) I have one more question. Suppose that the average weight of students in a statistics class is 75.5 kilograms with a standard deviation of 10.3 kilograms. Using the 68-95-99.7 rule, what is the lower bound for the weight of the top 2.5% of students.
February 10, 2014

STATS
Thank you that helps a lot. I have been struggling with this. C. What percent of students weigh less than 60.1 kilograms? Z=(60.1-75.5)/10.3=-1.49 I checked the z-table and the probability is .0681. .0681*100=6.8% Is this problem correct?
February 10, 2014

STATS
Suppose that the average weight of students in a statistics class is 75.5 kilograms with a standard deviation of 10.3 kilograms. B. What percent of students have weights greater than 80.1 kilograms?
February 10, 2014

STATS
Thanks!
February 10, 2014

STATS
Suppose that the average weight of students in a statistics class is 75.5 kilograms with a standard deviation of 10.3 kilograms. A. 45% of the student weights are above ____ kilograms? Z=.3264=x-75.5/10.3 Now what?
February 10, 2014

stats
how do I find the margin of error for the given values of c,s,and n c=0.95, s=2.1,n=100
December 5, 2013

Physical Science
(c) ____Cl2(g) + ____KBr(aq)h____Br2(l ) + ____KCl (aq) (d) ____CH4(g) + ____O2(g)h____CO2(g) + ____H2O(l )
December 4, 2013

Math URGENT PLEASE
If a car in 1963 cost @$2,400 How much would that be in 2012
November 25, 2013

Math URGENT PLEASE
Please Help, The last question has to be done by midnight. A chevy Bel Air, a classic car today, cost $2,400.0 new in mid-1963. How much would that be in 2012 dollar.
November 25, 2013

algebra
Please Help, The last question has to be done by midnight. A chevy Bel Air, a classic car today, cost $2,400.0 new in mid-1963. How much would that be in 2012 dollar.
November 24, 2013

Mathematics
calculate the CPI for this year and for 5 years from now. Project the price 5 years from now of an item that you commonly buy. **Dunkin Donuts Coffee**** $2.04 Please help, I know I am missing something. Thanks
November 24, 2013

Math
HELP: Does THIS LOOK OK SO FAR? NEED HELP WITH THE REST, PLEASE! A 1963 Chevy Bel Air, a classic car today, cost $2400 new in mid-1963. How much would that be in 2012 dollars? Cost 2012 = CPI in 2012 Cost 1963 = CPI in 1963 Cost in 2012 = 232.0 $2,400 30.6 Cost in 2012= $2,400...
November 24, 2013

math
A 1963 Chevy Bel Air, a classic car today, cost $2400 new in mid-1963. How much would that be in 2012 dollars?
November 23, 2013

math
Saving for retirement by contributing the same amount each month from your 23rd birthday until your 65th birthday, in an account that pays a steady 4% annual interest compounded monthly. How much will be in your fund at age 65 if you save $100 a month?
November 23, 2013

Math
A pair of newborn male and female rabbits is placed in an enclosure to breed. The rabbits start to bear young TWO MONTH after their own birth. At the end of each month, they have another male-female pair, which in turn mature and start to bear young ONE MONTH later. None of ...
November 17, 2013

Math
A pair of newborn male and female rabbits is placed in an enclosure to breed. The rabbits start to bear young ONE MONTH after their own birth. At the end of each month, they have another male-female pair, which in turn mature and start to bear young ONE MONTH later. None of ...
November 17, 2013

Math
A pair of newborn male and female rabbits is placed in an enclosure to breed. The rabbits start to bear young one month after their own birth. At the end of each month, they have another male-female pair, which in turn mature and start to bear young one month later. None of ...
November 17, 2013

Math
With these ideas in mind, evaluate—in a paragraph each—the following data depictions. U.S. Federal Budget Policy Outlays by Category for 2015. (U.S. Federal Budget for 2011.) p. 153. This display shows expected expenditures of the federal government in 2015, totaling...
November 17, 2013

math
If anyone has "For All Practical Purposes" I am stuck on page 680, Writing Project # 2. It is just to long to post.
November 17, 2013

Math
How can I rewrite this statement for my math class: "The war funding bill...passed this week, but with three times fewer Democrats voting for it than did the last year.
November 16, 2013

Math
If a dollhouse was made out of the same material as a real house, how would their weights compare?
November 16, 2013

Math
12''
November 16, 2013

Math
Dollhouse and the furnishing are built to a scale of exactly 1 in. to 1 ft, what is the linear scaling factor?
November 16, 2013

Math
Growth rate of odd size object: Start: 1.5" w by 1.5" l by .25" h End: 3.25" w by 3.50" l by .25" h Did this object increase by 600%? Some people tell me approx. 500% and 405% Which is it and how do you do the math for the correct answer?
November 15, 2013

math
Please I need help: I need to figure out the procedure to this question: Growth rate of odd size object: Start: 1.5" w by 1.5" l by .25" h End: 3.25" w by 3.50" l by .25" h Did this object increase by 600%? How do I figure this out? Thank you very...
November 14, 2013

Math
Steve, Sam or Salah, How do you come up with your answers of 500%, 505 405% Please and Thank you, Tracy
November 14, 2013

Math
Growth rate of odd size object: Start: 1.5" w by 1.5" l by .25" h End: 3.25" w by 3.50" l by .25" h Did this object increase by 600%?
November 14, 2013

Algebra (Pythagorean Theorem)
Ahmed has half of a treasure map. which indicates that the treasure is buried in the desert 2x + 6 paces from castle rock. Vanessa has the other half of the map. Her half indicates that to find the treasure one must get to castle rock walk x paces to the north and then walk 2x...
November 4, 2013

Algebra
Thank you
November 4, 2013

Algebra
I was not asking if it was a Pythagorean Theorem? This is the equation that I have to solve
November 4, 2013

Algebra
This is a Pythagorean Theorem x^2 + (2x + 4)^2 = (2x + 6)^2
November 4, 2013

Algebra
thank you
November 1, 2013

Algebra
Help I'm stuck I need to factor a trinomial expression using the AC method 15x^2 + 31x + 2
November 1, 2013

Algebra
I need to know how to factor these in A-C method form 2a^2+1+3a 9w-w^3
October 31, 2013

Algebra (factoring Polynomials)
I need to know how to factor these in A-C method form 2a^2+1+3a 9w-w^3
October 31, 2013

Algebra (factoring Polynomials)
Thank you. Can you please do this in the ac method form?
October 31, 2013

Algebra (factoring Polynomials)
9w-w^3 2a^2+1+3a
October 31, 2013

math
if Ted's front porch is 9 and 3/4 inches by 4 feet.How long is his porch?
October 29, 2013

Algebra
(-9x^3 + 3x^2 -15x)divided by (-3x) Find the quotient
October 28, 2013

Polynomials
In order for me to understand I need step by step explanations.
October 28, 2013

Polynomials
still confused
October 28, 2013

Polynomials
P dollars is invested at annual interest rate r for 1year If the interest is compounded semiannually then the polynomial P(1+r/2)^2 represents the value of the investment after 1 year. rewrite the expressions without parentheses evaluate the polynomial if P=5670 and r=3.5%
October 28, 2013

algebra
find the quotient (-9x^2 + 3x^2- 15x) - (-3x)
October 28, 2013

Algebra
P dollars is invested at annual interest rate r for 1year If the interest is compounded semiannually then the polynomial P(1+r/2)^2 represents the value of the investment after 1 year. rewrite the expressions without parentheses evaluate the polynomial if P=5670 and r=3.5%
October 28, 2013

Algebra
I have two questions dealing with financial polynomials. $6780 compounding 2.5%interest once a year yields? in interest 5760 compounding 3.5 interest once a year yields? in interest
October 28, 2013

Algebra
Ozark furniture company can obtain at most 3000 board feet of maple lumber for making its classic and modern maple rocking chairs. A classic maple rocker requires 15 board feet of maple and a modern rocker requires 12 board feet of maple. write an inequality that limits the ...
October 21, 2013

Algebra
a line passes through the point (4,1) and has a slope -4 write an equation for this line
October 20, 2013

Algebra
graph the line with slope -2/3 passing through (-5, -5)
October 20, 2013

Algebra
a line passes through the point (-7,-4) and has a slope of 3 write an equation for this line
October 20, 2013

Algebra
how do you find -4/5 on a graph?
October 20, 2013

Algebra
4x-3y=-6 finding the x and y intercept line based on a equation in standard form
October 20, 2013

Algebra parallel and perpendicular
Thank you. can you explain the steps that you used.
October 17, 2013

Algebra parallel and perpendicular
y=3/4x-1 write equation for a line parallel to the given line passing through (4,0)
October 17, 2013

Algebra
8(v-8)-2v=-28
October 12, 2013

Algebra
0.05(0.3m+35n)-0.8(0.09n-22m)
October 5, 2013

Algebra
It was not -2w it was 2w
October 5, 2013

Algebra
2w-3+3(w-4)-5(w-6)
October 5, 2013

Algebra
-2w-3+3(w-4)-5(w-6)
October 5, 2013

algebra 1
The sum of four consecutive integers is decreased by 30, the result is the fourth integer. Find the four integers.
October 1, 2013

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