Questions Asked on
August 4, 2007

  1. statistics

    A bank loan officer rates applicates for credit. The rating are normally distributed with a mean of 200 and a standard deviation of 50. Find the P60, the score which separates the lower 60% from the top 40%. I get 212.7, using the normal distribution tool

    asked by joanna
  2. us history

    how did the fear of alienating the border states affect nothern strategy during the war? President Lincoln is "reported to have said that he hoped to have God on his side, but he had to have Kentucky." That's from this article:

    asked by jorge
  3. statistics

    A company manufacturers batteries of 18 and there is a 3% rate of defects. Find the standard deviation for the number of defects per batch. Did you mean to write: "A company manufacturers batteries IN BATCHES of 18 and there is a 3% rate of defects." ?

    asked by john
  4. statistics

    The probability is 0.7 that a person shopping at a certain store spend less than $20.00. For groups size of 22, find the mean number who spend less than $20.00 Do they tell you the most probable amount spent? There are an infinite number of combinations of

    asked by john
  5. Chemistry, #5

    For propanioic acid, HC3H5O2, Ka=1.3 x 10^-5, determine the concentration of the species present, the pH and the percent dissociation of a 0.21 M solution. Do this for H+, OH-, C3H5O2-, HC3H5O2, and the pH and percent dissociation. If someone can please

    asked by Taasha
  6. Chemistry, #3

    Thallium hydroxide is a strong base used in the synthesis of some organic compounds. Calculate the pH of a solution containing 2.55 g TIOH per liter. Sorry! I'm having a really hard time with this acid/base stuff! TlOH is a strong base as the problem says.

    asked by Taasha
  7. Statistics

    A recent survey of students on the question “Do you think the United States should retain or abolish the use of the penny as a coin of currency?” showed that 20 of the 28 students thought that the United States should retain the penny. Consider this

    asked by Kayse
  8. Statistics

    I have a problem I need some help on. I answered some. For many years the numbers of accidents per week at a hazardous intersection have been studied. The number of accidents per week varies with mean 2.2 and standard deveiation 1.4. 1. Could the exact

    asked by Kayse
  9. english

    I need some help writing a paragraph about the literary devices in the book Twisted Summer. This is what I have so far. Twisted Summer is a fictional murder mystery. The setting was at Crystal Lake, where everything took place. There was definitely irony

    asked by melissa
  10. statistics

    If Z is a standard deviation, find the probability that Z lies between -1.10 and -0.36 You have not provided enough information to answer that question. Besides, a different symbol should be used for the standard deviation and the variable (Z) itself. Are

    asked by Artie
  11. Chemistry

    (1.00 x 10^5)NM - (3.96 x 10^3) NM = ? I think that since they're both NM don't you think that you can just subtract them? 96,040 NM whatever NM stands for, and I didn't factor in significant figures. Isn't that nanometers..Dr.Bob? I have no idea but

    asked by Anonymous
  12. Algebra

    Find two consecutive even integers that have a sum of 450. 224+226=450 If two consecutive even integers, x and x + 2, add up to 450, then 2x + 2 = 450 2x = 448 x = 224 is the smallest of the two. Okay thanks.

    asked by Shawn
  13. Statistics

    Why would one not be surprised that when students were asked how many minutes they studied on a typical weeknight, most responses are in multiples of ten minutes???? This question seems to be more about psychology than statistics. Most people don't recall

    asked by Kayse
  14. environmental science

    Hi. I was wondering if someone could help me grasp a concept. The concept is that soon the world will run out of natural resources to sustain life on Earth as the population increases. This idea is presented in a book I am currently reading, EO Wilson's

    asked by Lillian
  15. science(chem)

    Potassium Carbonate + Sodium Bicarbonate... toxic or not? Saw a actual bottle of this stuff in the supermarket...label says oddly enough.."for refreshing dry squid"...weird.. technically how can it "refresh" dry stuff? Sodium bicarbonate is one of those

    asked by ~christina~
  16. Stupid Chemistry

    Ok, blonde moment here, Kb is the same as Ka but just for bases and Ka is for acids correct? right. Ka is the ionization constant for acids, Kb is the ionization constant for bases. BUT, we can change one into the other this way. KaKb = Kw. So if you are

    asked by Taasha
  17. Statistics

    I have a problem I need some help on. I have answered parts. Any guidance would be appreciated. K For many years the numbers of accidents per week at a hazardous intersection have been studied. The number of accidents per week varies with mean 2.2 and

    asked by Kayse
  18. Philosophy

    I need to write an informative 700-1050 word letter in the persona of one Eastern philosopher to one of his pupils. In the letter, described your chosen philosopher's viewpoints concerning on of his philosophies. In needed, cite secondary sources according

    asked by Darlene
  19. Geometry

    If M is the midpoint of line AB.How do i Find the coordinates of B given A(4,-2) and M(1,3). M = (A + B)/2 ----> B = 2 M - A = 2(1,3) - (4,-2) = (2-4,6+2) = (-2,8)

    asked by Jim
  20. Gemoetry question

    B is the midpoint of line Ac AB=3x AC=7x-5 How do I find what the value of BC is? Since B is the midpoint, AB = BC 3x = 7x -5 4x = 5 x = 5/4

    asked by Jim
  21. Another Geometry question

    B is between A and C. AB=4x+3 BC=3x-2 AC=57 What is the value of x? Solve the relationship AB + BC = AC Substitute the appropriate algebraic expressions for the line lengths. The result will be the equation 7x + 1 = 57 Solve that.

    asked by Jim
  22. Life Science

    How did Mendel’s approach to answering scientific questions differ from that of his contemporaries? Thank you for using the Jiskha Homework Help Forum. You might want to see the answer just posted for Diana.

    asked by Q
  23. statistics

    Can someone assist me in answering this question. Use the given values of n and p to find the mimimum usual value of u-2standard deviations and the maximum ususual values u+20. n-186, p=0.13

    asked by natalie
  24. Life Science

    How did Mendel novel approach contribute to his success in describing how traits are inherited Thank you for using the Jiskha Homework Help Forum. Here are some sites for you: 1. http://en.wikipedia.org/wiki/Heredity (at the bottom, be sure to click for

    asked by Diana
  25. math

    IF f(x)={(3,5), (2,4), (1,7)} What about 1/f(x)? would is be {1/5, 1/4, 1/7}? IF g(x)=sqrt(x-3) k(x)=x^2+5 how would I solve? (k-g)(5)= (g o k)(7)= k^-1(x)= (kg)(x)= nevermind. I know how to do them.

    asked by Anonymous
  26. math

    a circle is tangent to the y-axis at y=3 and has one x-intercept at x=1 a) what's the other x-intercept b) what's the equation i have no clue how to solve this! You know that the center of the circle is somewhere in the line y = 3, denote the x-coordinate

    asked by Anonymous
  27. Ethics

    Having a hard time finding websites on Puerto Ricans living in America and identifying the linguistic, political, social, economic and familial conventions Good weblinks in here to help you. http://www.jiskha.com/display.cgi?id=1175871078 If you need more

    asked by Betty
  28. Creativity-- Question

    Which phrase fosters creativity? 1. "There is no such thing as a purple cat." 2. "I'll show you how to do it." 3. "What is this a picture of?" 4. "You used lots of purple in your picture!" Would "You used lots of purple in your picture!" be correct? Of the

    asked by Alana
  29. Algebra II

    Factor out: 64x^3 + 1 It is a binomial times a trinomial (4x+1)(16x^2-4x+1) should work. Check my math again! [8x^(3/2) - i][8x^(3/2) + i] Although my previous answer works (if i = sqrt-1), Taasha's is what you are looking for.

    asked by Juri