Tuesday
February 9, 2016

# Posts by PsyDAG

Total # Posts: 21,166

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. Resubmit with your answers.
November 25, 2015

Science
Because we don't know what an "átomo" is?
November 25, 2015

Ciencias
Trato contestar en Inglés. Antibiotic use can promote development of antibiotic-resistant bacteria. Every time a person takes antibiotics, sensitive bacteria are killed, but resistant germs may be left to grow and multiply. Repeated and improper uses of antibiotics are ...
November 25, 2015

Ciencias
Es mejor a preguntar en Inglés. No sé "estafiilococo."
November 24, 2015

math
Because the sum of the first column > 9.
November 24, 2015

Math
J - 6 = 4(F-6) = 4F -24 Therefore J = 4F - 18 J + 4 = 2F Substitute 4F-18 for J in the third equation and solve for F. Insert that value into the second equation to solve for J. Check by putting both values into the third equation.
November 24, 2015

math
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 I'll let you do the ...
November 23, 2015

Math
Online "^" is used to indicate an exponent, e.g., x^2 = x squared. Cannot post diagrams here.
November 23, 2015

Algebra 2
No data. Models of what? How long does it take to produce one model? What are the costs of producing one model?
November 23, 2015

Science
The moon is smaller than the earth, so its gravitational pull is less.
November 23, 2015

psychology
Sensory adaptation is becoming less sensitive to a stimulus after sensing it continuously for a period of time. Let me give you a real life example — mine. Decades ago, I worked in an old home with several buildings. Even though they tried to keep the buildings clean, the...
November 23, 2015

math
(8/3)/8 = x/11 (8/3)/8 = x/6 Solve for x.
November 23, 2015

math
November 23, 2015

math
How many shrubs?
November 23, 2015

Math
12.5 * (1-.75) = blue 32/3 * (1-.8) = white Add blue and white.
November 23, 2015

Math
3.25/1 = x/2.75 Solve for x.
November 23, 2015

MATH
25.5 * 82 = ?
November 23, 2015

Math
20 - 6.5 - 29/8 = ?
November 23, 2015

MATH
44 * 3/4 = number Already have the fraction in the information.
November 23, 2015

math
No values given.
November 23, 2015

Pre-Algebra (Partial)
Too many to respond to. However, first 5 are correct.
November 22, 2015

algebra
Online "^" is used to indicate an exponent, e.g., x^2 = x squared. L = 5W LW = 80 Substitute 5W for L in the second equation and solve for W. Insert that value into the first equation to solve for L. Check by putting both values into the second equation.
November 22, 2015

No, you are making it too hard. The problem (as you indicated it) does not indicate that you have to convert it to ounces. 2 - 2/5 - 3/10 = 2 - .4 - .3 = 1.3 pounds
November 21, 2015

Pure Math
November 21, 2015

Pure Math
See later post.
November 21, 2015

Math
Was the "percent of fat calories that a person in America consumes each day" determined by this sample? If so, this sample is too small to generalize to the population. If not, I would assume that the data was found with a larger sample and apply the normal ...
November 20, 2015

science
November 20, 2015

Statistics
Unclear. Typo? Z = .12/2 = .06? Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.06) and its Z score.
November 20, 2015

Chemistry?
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. What is your question?
November 20, 2015

Behavioral Statistics Help!
How would you respond, if a bonus was taken away? Using "the same subjects tested in both situations" would lead this to happen.
November 20, 2015

Statistics
In the patient's mind, the placebo reduces anxiety (and therefore some of the stress). This reduction can decrease the perceived pain. http://drdavespsychologypage.homestead.com/Placebo_Power.pdf http://drdavespsychologypage.homestead.com/Placebo_Power_Doubled.pdf
November 20, 2015

algebra
November 19, 2015

Math
A square has all sides equal.
November 19, 2015

math
Distance = rate times time 10 = 65t 10 = 50t Solve for t, convert to minutes and compare.
November 19, 2015

Stats
No table. You cannot copy and paste here.
November 19, 2015

math
What is the "same" exchange rate?
November 19, 2015

Science
Since this is not my area of expertise, I searched Google under the key words "evolution evidence" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=evolution+evidence&ie=UTF-8&oe=UTF-8&gfe_rd=ssl&ei=6WJPVqyVB-aD8QfPwbWgDA In the ...
November 19, 2015

science
Density = mass/volume
November 19, 2015

Statistics
A) small sample. What experiment? B) If that is the first quartile, then 25% would consume 34.31 fat calories or less. Consumption ≤ 34.51
November 19, 2015

Algebra
When multiplying, exponents are added. 1. x^2/9 2. 16a^4/c^8
November 19, 2015

Physics needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
November 19, 2015

scale factors
3.5/1 = x/20 Solve for x.
November 19, 2015

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (±.025) and its Z score. 95% = mean ± Z(SEm) SEm = SD/√n Need value of SD.
November 19, 2015

Science
What solution?
November 18, 2015

How many 1/2 dozen and/or 1 dozen batches did she sell. For example: 6 half-dozen = \$30 - \$10 = \$20 profit. 3 dozon = ? 2 half-dozen and 2 dozen = ? etcetera
November 18, 2015

math
b - .7b = Sale price
November 18, 2015

Math
It helps to indicate each answer WITH the question e.g., ***. 1. yes 2. No 3. No 4. Yes 5. Typo? 6. Yes 7. Yes 8. No 10. Yes
November 18, 2015

Math
We cannot chose for you.
November 18, 2015

math
It would help if you proofread your questions before you posted them. Typo?
November 18, 2015

Math
What rectangles? Cannot copy and paste here.
November 17, 2015

Pre Algebra Math
To check answers, we need to know what the problems are.
November 17, 2015

Let x = tree height x/8 = 6/4 Solve for x.
November 17, 2015

Chemistry needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
November 17, 2015

With data so spread out, it is essentially impossible to evaluate.
November 17, 2015

biology
Since this is not my area of expertise, I searched Google under the key words "purines in DNA" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=purines+in+DNA&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the information ...
November 17, 2015

maths
1000km/2cm = xkm/2.5cm Solve for x.
November 16, 2015

maths
2/5 = x/15 20 - x = ?
November 16, 2015

Southwark
52 > 36
November 16, 2015

Math
B = 2S B - 600 = P B + P + S = 6900 2S + (B-600) + S = 6900 2S + (2S-600) +S = 6900 Solve for S.
November 16, 2015

Math
L = 2W + 8 2L + 2W = 100
November 16, 2015

algebra
November 16, 2015

Math
http://www.celsius.co.uk/converter/
November 16, 2015

Psychology
The photoreceptor would sense brightness, whether rod or cone. However, since the cones work in combination to sense colors, that would not happen. Amount of light = brightness.
November 16, 2015

Science
What questions? We do not have lesson 9. 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.
November 16, 2015

spanish
What are your choices? ellos dan?
November 16, 2015

biology
Since this is not my area of expertise, I searched Google under the key words "history of the discovery of DNA" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=history+of+the+discovery+of+DNA&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the ...
November 16, 2015

math
For whole numbers, 2 and 1. If fractions, it can almost be infinite.
November 16, 2015

Math
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 I'll let you do the ...
November 15, 2015

college math
3/5 = x/2000 Solve for x.
November 15, 2015

statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/49 * 1/48 * 1/47 * 1/46 * 1/45 * 1/44 = ? There is an equation for this, but I don't remember it.
November 15, 2015

Verbal presentation is presentation with words (e.g., two thousand fourteen).
November 15, 2015

chemistry needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
November 15, 2015

math
Let x = John's age (x-4)/2 = (x+5)/3 Solve for x.
November 15, 2015

math
3, 13, 23, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39 39-42 pages
November 15, 2015

Biology
Stable environment where?
November 14, 2015

Biology
Other organisms produce them.
November 14, 2015

Math
M = F - 3 M = 4W Substitute F-3 for M and solve.
November 14, 2015

math
What original function?
November 14, 2015

Biology
a. How can it be dominant, if there are carriers who do not have the disease? b. No, use Punnett Square: https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
November 13, 2015

Biology
a. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl b. Note that the male Y-chromosome does not have a normal clotting gene to dominate the recessive h gene on the X, so males cannot be just carriers. If they have one h gene, ...
November 13, 2015

math
A square would get the maximum area. (720/3)^2 = ?
November 13, 2015

Biology 30
a. Child would receive either A or B from mom, so could never have type O blood. There is no indication whether the parents are + or -. b. Do punnett square: https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
November 13, 2015

Statistics
Ho: error1 = error2 Ha: error1 ≠ error2 Ho: new = old Ha: new > old
November 13, 2015

Science
Agree.
November 13, 2015

Statistics 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.
November 12, 2015

science
A, B (disadvantage for the bacteria)
November 12, 2015

science
Varying sieves?
November 12, 2015

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 (.758) and its Z score. Insert data into equation above to calculate score.
November 12, 2015

math
Pythagorean theorem a^2 + b^2 = c^2 (hypotenuse)
November 12, 2015

math
None. You cannot copy and paste here.
November 12, 2015

english
Since this is not my area of expertise, I searched Google under the key words "suddenly" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=suddenly&ie=UTF-8&oe=UTF-8&gfe_rd=ssl&ei=cMZEVo_kNOWD8QfHxYzYBg In the future, you can find ...
November 12, 2015

If P = .01, then directional would look for P = .01. If nondirectional, you would look for P = .005 in either direction.
November 12, 2015

science
Since this is not my area of expertise, I searched Google under the key words "pftba" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=pftba&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the information you desire more ...
November 11, 2015

math (?)
It would help if you proofread your questions before you posted them.
November 11, 2015

Statistics
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 like "...
November 11, 2015

MLA citation