# Posts by PsyDAG

Total # Posts: 23,418

**science (?)**

What is "i"?

**Statistics**

Need to know standard deviation (SD). 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 for the Z score. Multiply by 1000.

**Probability**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. P(bb) = 1/4 * 1/2 P(Aw/h) = 1/4 * 1/2 Either-or probabilities are found by adding the individual probabilities.

**science**

Light does not go through the iris.

**math**

It would help if you proofread your questions before you posted them. What is "1-3"?

**Probability :(**

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.

**Biology**

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

**science (?)**

What subsystems do you mean?

**Psychology**

http://www.simplypsychology.org/cognitive-dissonance.html

**Math(AssignmentDueToday)**

If Mail is almost a meter, would the scaled down version be larger? x = 38.2/19100 = ?

**Math(Please 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.

**Math**

diameter = 2r 30/7 = 4 50/7 = 7 Area used = 28 * πr^2 = ? Subtract ? from 50*30 for waste

**Math**

No diagram. Cannot copy and paste here. Assuming the wall is 10 feet high: 12(10 - 2.75) - 36/2 = ? inches That is extremely low to hang a picture. Usually they are hung at close to eye level.

**psychology**

The reduction of tension and anxiety is immediate and negative.

**Abnormal Psychology**

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.

**biology**

I know blue eyes are recessive to brown, but I have no idea about the dominance/recessive relationship for straight/curly, dark/red hair.

**stats**

The probability of getting any one question right = 1/6. "at least 4 of the 6" means 4, 5 or 6 correct. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. P(4) = 1/6^4...

**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**

10 + 19 = 29

**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.

**Algebra**

Cannot graph on these posts.

**Math**

Cannot graph on these posts.

**Statistics**

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.

**Psychological Stats**

No need to play, just insert data and solve. Z = (score-mean)/SD

**math**

Ten thousands

**Math (?)**

Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. What is your question?

**math**

Online "^" is used to indicate an exponent, e.g., x^2 = x squared. x^2 - 6x + 9 = 64 x^2 - 6x - 55 = 0 Factor. What factors of -55 will add to give you -6?

**maths (?)**

It would help if you proofread your questions before you posted them. What is a "lakhs place"?

**English**

1, 2. Can indicates ability, while may indicates permission. 3 is awkward. 4, 5. You can feel better without actually being better. Symptoms may temporarily vanish. 7. Typical?

**English**

#2 infers that you don't look great without your uniform.

**math**

Smallest = 123,456,789.0 Largest = 9,876,543,210

**math (?)**

Cannot be done only knowing that 5 points are awarded for each correct answer. Score would be a multiple of 5. What information is missing?

**Statistics**

SEm = SD/√n Variance = SD^2

**math**

MEAN = ∑X/n = (7.75 + 6.30 + 6.30 + 7.00)/5 = ?

**Math Geometry (?)**

It would help if you proofread your questions before you posted them. "and and are"?

**math**

It would help if you proofread your questions before you posted them. Online "^" is used to indicate an exponent, e.g., x^2 = x squared. Do you mean 25-x^2 = 4x In that case, x^2 + 4x - 25 = 0

**math**

thousanths

**Math (?)**

It would help if you proofread your questions before you posted them. "hire purchase the...."?

**Biology**

23 pair before and after

**Math(Please Help Me, Assignment Due)**

B) 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 Z = (score-mean)/SD ...

**Algebra**

Boarding rate + miles(mileage rate) = Total cost

**The mind at work (?)**

What are your choices? Incentive? Encouragement?

**algebra (oops)**

I read square root. x^2 + 3x = 10 x^2 + 3x - 10 = 0 Factor.

**algebra**

Assuming the number is the same for multiple and square root: 3x + √x = 10 Solve for x.

**Maths**

The square lawn is 12 by 12, assuming that the path is not part of the lawn. With the path, the side is 12 + 2(1.5) = ?

**algebra**

B = 2H 25 = .5HB Substitute 2H for B in the second equation and solve for H.

**algebra**

L = W + 3 2L + 2W = 34 Substitute W+3 for L in the second equation and solve for W.

**math**

78,654

**algebra**

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.

**maths**

Is this what you are being asked to do? 64 = 64 63.6 = 64 50.3 = 49 18.7 = 16 You do the rest.

**math**

agree

**statistics**

That you are 95% sure that the true mean lies between those limits.

**math**

2/3x = 2.24 Solve for x then divide by 4.

**Management Science**

5 hours, A = $50, B = .15 * 5 * 60 9 hours, A = 50 + .25*60, B .15 * 9 * 60

**Math**

F = 62 - S F - 15 = 7(S-15) Substitute 62-S for F in the second equation and solve for S.

**math (?)**

Approximation of what? What following? Cannot copy and paste here.

**maths(?)**

It would help if you proofread your questions before you posted them. "Crore?" thirteen thousand nine hundred forty eight = 13,948

**maths**

Assuming it is a progression, I agree.

**MATH**

First, please do not use all capitals. Online it is like SHOUTING. Not only is it rude, but it is harder to understand. Thank you. It would help if you proofread your questions before you posted them. Don't know what "FO," "VO" and "BA" ...

**communication**

Do others make comments about you to you? If so, do you agree with those comments?

**math**

How much time is spent on each job?

**statistics**

What is the list of numbers measuring? Depth? For shell length, 99% = sample mean ± Z (SEm) SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (&...

**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 related to the Z score. Multiply by 100.

**Maths (?)**

What is your question?

**Math**

Could be any one of several, starting with 4489, 3368, 2247.... Do you have more data?

**Maths (?)**

More data needed.

**geometry (?)**

Not geometry. What is your q1uestion?

**geometry (?)**

No following shown. Cannot copy and paste here.

**Math**

Don't understand the second equation.

**Math**

A. Tires = cars * 4 b. Minutes = days * 24 * 60

**Algebra**

2008-1998 = ? Substitute that for x and solve.

**science**

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.

**Math**

1. +2 2. -9

**English**

1, 2, 3, 4. Yes "Was" better than "is," because planning was done previously.

**Stats**

n*p = 30 * .34 = ?

**Science**

If they have landed, zero. If not, .98m.

**math.**

3 * 39 * 10 = ?

**Psychology**

I would say classical experiments.

**Science**

Since this is not my area of expertise, I searched Google under the key words "Aldosterone effect on urine" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=Aldosterone+effect+on+urine&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you...

**math**

Mean = ∑x/n (80+85+82+x)/4 ≥ 85 Solve for x.

**Math**

Online "^" is used to indicate an exponent, e.g., x^2 = x squared. (a+b)^2 = a^2 + 2ab + b^2

**algebra**

How would you like us to help you?

**math**

12:14

**Math Makes Sense Grade 3**

1 - 1/4 = ?

**Math (?)**

No diagram. Cannot copy and paste here.

**math**

Nearest foot is 2.

**Business Mathematics**

How many tolls have to be paid? Assuming one toll: y = $2 + .80r Substitute 17 for r and solve.

**MATH**

Let x = total distance x - 1/3x - 2/5x = 1,200m Solve for x.

**Advanced Algebra**

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 (SD) Consider only positive value.

**English**

3 and 7 are incorrect.

**algebra**

Cannot draw graphs on these posts. b. 8 *.85 = ? c. 8 * 1.20 = ? d. compare 4.00/.85 to 4.00/1,20

**Math**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. P(3) = (5/12)^3 P(1of3) = (5/12)(7/12)^2 e) At least one = one, two or three Either-or probabilities are found by adding the ...

**Math**

Either-or probabilities are found by adding the individual probabilities. P(A or B)= P(A) + P(B) = .03 + P(B) = .07 P(B) = .04 Typos?

**math**

10 liters = 1 cubic centimeter 80*60*50 = ? cubic centimenters

**maths**

Since this is not my area of expertise, I searched Google under the key words "How to draw functions in same set of axes" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=How+to+draw+functions+in+same+set+of+axes&ie=UTF-8&oe=UTF-8&...

**MATH (?)**

First, please do not use all capitals. Online it is like SHOUTING. Not only is it rude, but it is harder to understand. Thank you. Between the chord and what?

**science (?)**

Lack data.

**statistics**

Z = (score-mean)/SD Use the Z table.

**Algebra**

Why do YOU think this? Might it be helpful in your later life?

**math**

The current value is $200. The cumulative value = $200 * 15 * 12