Thursday
April 24, 2014

Posts by PsyDAG


Total # Posts: 17,530

science
If the atmosphere gets thinner, what do you think happens to the air pressure outside the airplane?

Science (?)
What is a "shake up toy"?

Algebra (?)
What inequalities? You cannot copy and paste here.

stats
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. (1-.05)(1-.05) = ?

Math
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. 4/8 is 4 times greater than 1/8 and they add to 5/8.

math
36/1.5 = ?

math
hi

math
-2x+6y=-26 8x+6y=-16 Multiply first equation by 4, then add the two equations. -8x + 24y = -104 30y = -120 You should be able to work it from here.

statistics
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.10) and its Z score. Insert ±Z into equation above and solve for score.

Statistics (?)
Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance 95% = mean ± ...

stats
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.15) and its Z score. Insert all values in above equation to calculate the score.

math
If -2y = 1, then y = -1/2 Thus 3x + (-1/2) = 1, then: 3x = 3/2 x = 1/2

Math
2 cups = 16 fluid ounces 1 gallon = 128 fluid ounces 1 pint = 16 fluid ounces x/16 = 16/128 Solve for x.

Math
a = 90 - b 2b + a = 96 2b + (90-b) = 96 b = 6

math word problems
It lost the 2' plus another 4' (1 yd 1 ft). 2' + 4' =?

statistics
You do not mention what is being measured. Do the numbers represent SAT Scores or the number of people who took the test (participation rates)? Points on a scatter diagram are each represented by two numbers, one on the ordinate (Y axis) and the other on the abscissa (X axis)....

algebra (?)
No wall shown. you cannot copy and paste here.

Probability (?)
We do not have access to Table III.

Algebra
Multiply both sides by z. 6 - 3z = 8/5z Add 3z to both sides. 6 = 3z + 8/5z = 23/5z Multiply both sides by 5/23. 6 (5/23) = z 30/23 = z

Statistics
Find the means first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance Z = (mean1 - mean2)/stan...

math
a. What are pairs of factors of 128? Start with 2, 64. b. Pick the two factors that would allow the needed space. c. L * W = Area W = Area/L

math (?)
What design? Cannot copy and paste here.

algebra
Ratio is 1:3 with total of 4. 1/4

Child Development
D

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.071) and its Z score. OR… http://davidmlane.com/hyperstat/z_table.html

math
6 * .25 = ?

math
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though. However, I will do one problem. 4. 10b + 25 = 5(2b + 5)

Chemistry needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.

statistic****help*****
There are 2 possibilities with each coin. TTT HTT THT TTH HHT HTH THH HHH How many is that?

math
From your data, it makes more sense to subtract. Multiply second equation by 5 and subtract it from the first. 5x + 20y = 40 5x + 15y = 30 5y = 10 You should be able to proceed from here.

English??
"How to subtract from ADD"?

Health
Since this is not my area of expertise, I searched Google under the key words "mastication muscles" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=mastication+muscles&ie=UTF-8&oe=UTF-8 In the future, you can find the information y...

psychology
I can't make any sense out of it either. It would help if you proofread your questions before you posted them. You cannot copy and paste here.

psychology
mental processes

statistic****help*****
Looks fine to me.

statistic****help*****
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though. However, I will start you out. 10. Since you are dealing with percents, the grand total = 1....

Statistics
95% = mean ± 1.96 SEm SEm = SD/√n I'll let you do the calculations.

science question
indicator? Independent variable? determiner?

STATISTIC***HELP
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.

Alegbra
If you move the decimal place to the left, the exponent is positive. If you move decimal place to the right, exponent is negative. 9.3 * 10^7

Algebra
3.4 * 10^-7

Science
As long as you are saying "any," I would choose 1.

Statistic
K = .40 * .40 = ? L = .30 *.60 = ? Either-or probabilities are found by adding the individual probabilities.

Math 3
130/8 = 16.25 If she wants to bag "all" the cookies, there will be only 2 in the 17th bag.

math
Well, what do you notice? Is it closer to the original number?

Astronomy
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. Since this is not my area of expertise, I searched Google under the key words "fastest moon" to get these possible sources: https:/...

math (?)
?

Stats
80% = mean ± 1.28 SD

statistic help please
See Post under name of Helen.

statistic help please
32/259 = ? I have already answered this second question in a previous post.

statistic
I'm not sure about D.

statistic
A. 26/52 = ? B. How many queens are there? Divide by 52. C. How many red queens are there? Divide by 52. D. If the face card was replaced, no different from B. If not replaced, and queen drawn, 3/51. Or if queen not drawn, 4/51. Either-or probabilities are found by adding the ...

Biology
B https://www.google.com/search?client=safari&rls=en&q=water+to+steam&ie=UTF-8&oe=UTF-8 In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

Biology
Since this is not my area of expertise, I searched Google under the key words "mutation DNA" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=mutation+DNA&ie=UTF-8&oe=UTF-8 In the future, you can find the information you desire more...

Science
Different from what? Each different substance has distinct chemical and physical properties.

science (?)
Which wave? https://www.google.com/search?client=safari&rls=en&q=calculate+amplitude+of+a+wave&ie=UTF-8&oe=UTF-8

Science
Agree with Jay.

Math (Partial)
First two questions and last. Z = (score-mean)/SD SD^2 = variance Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability of the Z score.

Statistics (?)
No data given. Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(SEmean1^2 + SEmean2^2) SEm = SD/√n If only one SD is provided, you can use just that to determine SEdiff. Find table in the back of your statistics text labeled something ...

statistics
95% = mean ± 1.96 SEm SEm = SD/√n

Science
Rain forest is only one type of environment and trees are only one group of plants. Organisms either adapt to their environment or die.

math
Volume cone = 1/3π(r^2)h Surface area Square pyramid = 2bs+b^2 Volume Rectangular prism = L*b*m

stat
I don't know what your "rule of thumb" is, but: a. 95% = mean ± 1.96 SD b. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to t...

Phi
Since this is not my area of expertise, I searched Google under the key words "social contract approach to political theory" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=social+contract+approach+to+political+theory&ie=UTF-8&oe=U...

human bio please help
A fibers B Calcium?

science (?)
What phenotypes?

science
http://simple.wikipedia.org/wiki/Malleability In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

math
Looks good!

math
Right!

Weather needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.

Science
These apply to any subject. http://drdavespsychologypage.homestead.com/Be_Here_Now_.pdf http://drdavespsychologypage.homestead.com/Learning_Requirements.pdf http://drdavespsychologypage.homestead.com/Learning_Hints.pdf

Biology
Right

Science... plz help~!(?)
https://www.google.com/search?client=safari&rls=en&q=popul+Vuh&ie=UTF-8&oe=UTF-8#q=popol+vuh+mayan&rls=en

Algebra
(x+y)^2 = x^2 + 2xy + y^2

Alegbra
Online "^" is used to indicate and exponent, e.g., x^2 = x squared. When multiplying terms, the exponents are added. (x^5)(x^7) = x^12

SCIENCE HELP ASAP PLZ! ONLY ONE QUESTION!!!!!!!!
Since when do social groups provide instincts?

SCIENCE HELP ASAP PLZ!
If you have no territory, you have no resources.

Science
Since this is not my area of expertise, I searched Google under the key words "respiration of animals" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=respiration+of+animals&ie=UTF-8&oe=UTF-8 In the future, you can find the informa...

math
Find 2 factors in your end terms that will add to give the middle term. 18 = 9*2 = 6*3 This doesn't seem possible with your equation. Do you have a typo?

Chem needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.

human biology please help
Since this is not my area of expertise, I searched Google under the key words "golgi bodies function" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=golgi+bodies+function&ie=UTF-8&oe=UTF-8 In the future, you can find the informati...

algebra
Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. I'll let you do the calculations.

Liberal Arts Math II
https://www.google.com/search?client=safari&rls=en&q=snowflake+island+perimeter&ie=UTF-8&oe=UTF-8

biology PLEASE HELP
Cell membrane

human biology need help
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.

Physics needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.

Math
I would use a bar graph for both.

Math
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.

Math - please help
L = 3s k = s -20 s + 3s + s-20 = 170 Solve for s, then k and L.

Algebra
Right!

Algebra
1, 2. Okay 3. √0 - 2 = -2… √9 - 2 = 3 - 2 = 1 I'll let you do the other two.

math
.06% = .0006

Please Help Me :( Science: Biology, Genetics!
1. alleles? 2. mitosis, meiosis 3. incomplete dominance? 4. chromosomes 5. reproduce?

6th grade math - statistics
The middle 50% would be from between 3 and 4 to between 8 and 10 (the middle 6 scores). Q1 defines the lowest 25% (0, 1, 3), while Q3 defines the highest 25% (10, 12, 12).

exam # 013050 (?)
No data given.

Alegbra
x = 5000-y .05x + .08y = 331 Substitute 5000-y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation. Where can I find those interest rates?

Math (?)
What is your question?

math(QUESTION)
Agree

psychology
Since there are so many variables in personal interaction, it might be best to use several recorded requests (same content) from both genders and have doctors respond to them. To make is double blind, a third party would be the only one who knows the gender of the speakers, ex...

operations and supply
Since this is not my area of expertise, I searched Google under the key words "master production schedule" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=master+production+schedule&ie=UTF-8&oe=UTF-8 In the future, you can find the...

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