Sunday
December 21, 2014

Posts by erica


Total # Posts: 542

psychology
Today, most psychologists take ____ approach to human development. a nativist an empiricist a dualist an interactionist
November 2, 2010

Statistics
A group of 56 randomly selected students have a mean score of 30.8 and a standard deviation of ó = 4.5 on a placement test. Find a 95% confidence interval for the mean score, ì, of all students taking the test.
November 1, 2010

Stats
A group of 56 randomly selected students have a mean score of 30.8 and a standard deviation of 4.5 on a placement test. Find a 95% confidence interval for the mean score, ì, of all students taking the test. (Note: ó is unknown.)
November 1, 2010

Stats
If a confidence interval for the mean is 24.8 < ì < 29.6. What is the margin of error?
November 1, 2010

5th grade Math
I have to find the function rule that goes with this table... X Y 2 8 4 18 7 33 9 43 12 57 I've been trying to figure it out for an hour and can't find anything that works for all of them.
October 27, 2010

physics-please help!
The total cross-sectional area of the load-bearing calcified portion of the two forearm bones (radius and ulna) is approximately 2.5 cm2. During a car crash, the forearm is slammed against the dashboard. The arm comes to rest from an initial speed of 80 km/h in 4.2 ms. If the ...
October 27, 2010

physics
A sample of blood is placed in a centrifuge of radius 20.0 cm. The mass of a red blood cell is 3.0 10-16 kg, and the magnitude of the force acting on it as it settles out of the plasma is 4.0 10-11 N. At how many revolutions per second should the centrifuge be operated?
October 18, 2010

physics
A 512 kg satellite is in a circular orbit about the Earth at a height above the Earth equal to the Earth's mean radius. (a) Find the satellite's orbital speed. (b) Find the period of its revolution. (c) Find the gravitational force acting on it.
October 18, 2010

graph on a plane
graph the inequality on a plane 3x+4y is less then or equal to 12
October 12, 2010

graph on a plane
graph the inequality on a plane 3x+4y is less then or equal to 12
October 12, 2010

Physics
θ = 30° x-direction: vi + vf cos θ = x 1.4m/s - 0.79m/s(√3/2) = 0.716m/s y-direction: vf sin θ = y 0.79m/s * 0.5 = 0.395m/s Speed = √(x² + y²) √[(0.716)² + (0.395²)] = 0.818 m/s Direction: Tan-¹ (y/x) = Tan-¹...
October 7, 2010

7th math
how to do 345x 7.899=
September 18, 2010

Physics
A bag of sugar weighs 4.00 lb on Earth. What would it weigh in newtons on the Moon, where the free-fall acceleration is one-sixth that on Earth? 1 N Repeat for Jupiter, where g is 2.64 times that on Earth. 2 N Find the mass of the bag of sugar in kilograms at each of the three...
September 16, 2010

Math Problems
Pat worked 43 hours and received $7.25 per hour for regular pay and time-and-a-half for all hours over 40 hours. What were her weekly earnings? $22.83 $322.63 $269.75
September 16, 2010

Physics
The leg and cast in the figure below weigh 280 N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w1 weighs 130 N. Determine the weight w2 and the angle á needed so that no force is exerted on the hip joint by the leg plus cast.
September 15, 2010

geometry
i meant geometry but im still stuck and i have 3 more questions about this
September 13, 2010

john marshall
i don't understand how to do this prblem what is ab=x +7,bc=17,ac =2x
September 13, 2010

math 5 grade
Idk just wanted to post
September 13, 2010

history
How did human history in North America during the period described in the Prologue differ from the events of Asia, Eurasia, and Europe? Be specific. How were these differences important to the international state of affairs in 1450? this is using the american nation: a history...
September 10, 2010

business
Choose one of the organizational departments, such as accounting, finance, HR, and so on of a business. What is the role of this department? What types of information does the department need? How does the department use that information?
August 31, 2010

math
how would i construct a truth table for (p and ~q) double arrow q (sorry inexperienced with the symbols and keyboard shortcuts).
August 23, 2010

math
how would i construct a truth table for ~q then p (or arrow p)
August 23, 2010

health
What would be a strength and a weakness for the center of disease control?
July 10, 2010

History Check
The _____ Plan, favored by _____ States, proposed giving States equal representation in a unicameral Congress.
June 25, 2010

English-Ms. Sue
Start by taking out all the details. They are good, but this is a summary not a report about the book. You can still summarize those points but not in depth. Hope I helped! :)
June 16, 2010

Algebra
solve by elimination method 5x+2y=-13, 7x-3y=17
June 11, 2010

reimbursement methodologies
medicare and medicaid financial issues put constraints on a. physician services
May 14, 2010

science
what roes do differnt parts of the eye play in seeing?
May 11, 2010

6th grade
If today is Tuesday, what integer stands for last Sunday?
May 4, 2010

psychology
How do various behaviors of social dominance and courtship display affect the evolutionary process?
April 17, 2010

Pre-calc-urgent
How do you find a formula for f(x) and g(x) if h(x)=f[g(x)] h(x)=(2x^3-5)^4
April 15, 2010

chemistry lab titration
Are the pH's at 5mL, 15mL, and 25mL equal the respective pKa's (11.60, 6.77, and 2.25) since they are all half-equivalence points?
April 7, 2010

math 10 general math
what is the yield for 8.5% compound continously?
April 4, 2010

math
What is a generalization for this set of polygons: square, hexagon and a pentagon
February 1, 2010

10th grade
The question is asking you what you'all did there?
January 21, 2010

Physics
I'm sorry, but that doesn't make sense to me, is there any other way you can explain it? Thanks.
January 20, 2010

Physics
A stationary billiard ball, mass 0.17 kg, is struck by an identical ball moving at 2.7 m/s. After the collision, the second ball moves off at 60° to the left of its original direction. The stationary ball moves off at 30° to the right of the moving ball's original ...
January 20, 2010

biology
I believe that it is A
January 20, 2010

math
So you need to make two equations, and then use substitution. I used A for the larger number and B for the smaller: A=B+5 4A+3B=97 Then you plug in (B+5) for A in the second equation... 4(B+5)+3B=97 4B+20+3B=97 7B+20=97 7B=77 B=11 A=5+11 A=16
January 20, 2010

3rd grade math
1600
January 4, 2010

algebra
what is n/15=120
December 5, 2009

math
CAN YOU SHOW ME THE QUICKEST WAY TO DO ALGEBRA
November 24, 2009

math
3X42
September 10, 2009

psychology
What task component distinguishes the Wechsler Scales from the SBIS?
September 7, 2009

12th grade Biology
followhich of the wing accurately shows the correct terms for the two sides of a chemical equation, correctly placed to the lelf or to the right where they belong ,and also shows the correct symbol that is written between them
August 23, 2009

English - A lesson before dying
what are two plot related titles and their pose or tone related title?
August 10, 2009

college
how to work symbolic representatios? i need to find the domain and range
April 24, 2009

Chemistry
there is a picture on google images... if you type in "crystal structure of lithium sulfide"......
April 15, 2009

Chemistry
The crystal structure of lithium sulfide (Li2S) is pictured here. The length of the unit cell is 5.88 x 10^2. For this structure, determine: a)the coordination number of Li and S b) the number of formula nunits in the unit cell c) the density of Li2S
April 15, 2009

Chemistry
The crystal structure of lithium sulfide (Li2S) is pictured here. The length of the unit cell is 5.88 x 10^2. For this structure, determine: (I could not paste the actual picture from the assignment here, but if you go to Google Image and type in "crystal structure of ...
April 14, 2009

Physics: Electricity and Magnetism
Four charges on a rectangle that is 6 cm by 3 cm. All but one of the corners has a positive charge. The magnitudes of the charges are all 8.40e-12 C. What is the net electric field at the center of the rectangle?
April 10, 2009

algebra 1b
i need to know how to solve certain problems like this 4x=2y-10 x+2y=5 i need examples of this and shown to me step by step
March 21, 2009

Psychology
I haven't watch that movie before, do you mind telling me exactly which part relates to memory and learning? I tried to find it in youtube, but not sure which part. thanks!
March 12, 2009

Psychology
This is a homework assignment for my Psychology course on Memory and learning. Find a Movie/video clip (1-3 mins)that demonstrate a concept / phenomenom relevant to learning and memory? My prof used Matrix (what we see is just our neuron firing) and Bourne Idenity(amnesia)for ...
March 12, 2009

Englsih
This is one of my english homework. Can someone have a look at it and give me some suqqestions. Thank you. The Summary of English Grammar defines the major word-classes in terms of meaning rather than structure. By references to any one of the major wordclasses state the ...
March 9, 2009

English
My other friend with the same assignment put dual for all of them.
March 9, 2009

English
YesYes. The question original is: Indicate the case, person, number and gender of the bracketed words. I only have trouble with indicating the gender. Thanks!
March 9, 2009

English
Indicate the gendr of the bracketed words. I tired them but I am not sure am I right or not. Please look over it and give me suggestion if they are wrong. Thank you!! (They) told the (children) the (stories) they had heard (themselves). They - collective children - collective...
March 9, 2009

simple math
it can yujuytufjurjrngdjhdfgknbijnnbgk bnbniojgoigmnio bgiokmihklninklgdb
February 16, 2009

English
I have did the corrections for my english homework I posted a few days ago. Can someone check it over again and give me some suggestion if they are still wrong. Thank you!! Identify the phrase in the sentence below, and name the kind and function of each phrase. a)Having had a...
February 7, 2009

English
This is my english assignment, hope someone will look over it for me!! Thanks Identify the phrase in the sentence below, and name the kind and function of each phrase. a)Having had a good season, they hoped to win the trophy. having had a good season: participial to win the ...
February 4, 2009

BUS 210
This isn't that hard, just read the f*ing chapter
December 3, 2008

Math
did u say divide 6 3times
December 2, 2008

3rd grade
The Pilgrims were seeking freedom
November 18, 2008

chem
how do i calculate the concentration of F ions using pH in ppm
November 16, 2008

Statistics
Assume that men constitute 49% of population in a country. Assume also that among men there are 5% of color-blinded. Find the proba- bility that a person chosen at random is a color-blinded man.
November 14, 2008

Chem
find pH of 0.050 M HCLO4 plus 0.050 M HBr> You must consider activities>
November 12, 2008

math
the edges of a cube are 3 inches long. what is the surface area, in square inches, of this cube?
November 9, 2008

health
the main reason you should rduce your intake of eggs is because egg yolks
October 28, 2008

math
Is the following set of numbers a perfect triple? 13, 15, 18 Why are they, or why not
October 27, 2008

chemistry
What does the statement the properties of salt are different from the properties of elements that go into making them mean
October 13, 2008

Math word problem
I am having problems with this part: add the equations... 33+63)km/time=64km/hr then time= 96/64 hr (I know this is 1.5) Now solve for speed of wind in the first equation.. (is it 33km/1.5 =22) 33km/time=32km/hr-speedwind.
October 12, 2008

Math word problem
Erik bicycles 32 km/h with no wind. Against the wind he bikes 33 km in the same time it takes to bike 63 km with the wind. What is the speed of the wind? I don't understand any of the responses. You have to assume in this case the wind retards and assists with the same ...
October 12, 2008

Help
Erik bicycles 32 km/h with no wind. Against the wind he bikes 33 km in the same time it takes to bike 63 km with the wind. What is the speed of the wind?
October 12, 2008

MATH
WHAT ARE THE BEST WAYS TO STUDY FOR MATH TEST...
September 19, 2008

physics
at 10:15 am, Snail 1 crossed the 65-cm mark with a velocity of 4cm/min. in a great burst of energy, snail 1 raced to the 90-cm mark in 3 minutes. his velocity as he crossed the 90-cm mark was 7 cm/min. what was the acceleration of snail 1?
September 18, 2008

11th grade
your pet dog runs around in circles, chasing his tail. Does this mean acceleration?
September 18, 2008

biology
if boron has 5 protons in its nucleus how many neutrons are there?and how many electrons? what if b-7 was an isotope how many nentrons are present in this atom? thanks for your help
August 4, 2008

Pre calc
How do you write a quadratic equation in standard form for a given set of zeros?
August 2, 2008

science
what is a flatcurved surface called
July 9, 2008

history
Nixon's policy of "engagement" with the Communists was called detente. Rather than military confrontation, Nixon championed diplomatic conversations. Nixon ended the Vietnam war, went to Red China, and started the nuclear arms reduction treaties. Nixon's ...
July 2, 2008

algebra
i figured it out :)
June 12, 2008

algebra
If y varies jointly with x and z, and y=24 when x=3 and z=2, then the value of x when y=6 and z=0.5 is 12 6 1 3 1/3
June 12, 2008

ecology
what part of the plant absorbs the most water?? Is it the stem?
May 27, 2008

CRITICAL THINKING
not sure
April 3, 2008

math
Thank you.
March 6, 2008

math
How would I find the a for the equation y= a(x-h)^2+k. I'm looking at a graph, and I can solve for everything except for a. What is it supposed to be?
March 6, 2008

U.S. History
What were the key arguments for and against U.S. imperialism during the Spanish American War??
March 2, 2008

molarity
what mass of sodium hydroxide, NaOH, must be dissolved to make 460 ml of a 1.10 M solution
February 27, 2008

english
the subjuect of a sentence may be what parts of speech?
February 12, 2008

math Thanks to everyone for the help it's needed!
what would be the radius of a circle with a diameter of 8 inches?
February 12, 2008

math
what is the average of 132,145,140,128? do u add them all togher then divide ? or just add them and get the answer?
February 12, 2008

math
robert bought a used car for $1,500.00 if the sales tax is 5% what is the total that he paid?
February 12, 2008

math
2/3+4/6+?
February 12, 2008

math its been years since school
a cube measures 3 inches on all its sides. Wgat is its volume in inches?
February 12, 2008

math
what is the perimeter of a triangle which sides mesure 6,8,and 10 inches?
February 12, 2008

geometry
what is the area of a rectangle with a width of 12 feet and a length of 10?
February 12, 2008

math
1 pie with diameter of a to b then radius of top to bottom half of c to o the chord is angle cob right. the questions are a. which chord is not a diameter b. name a central angle that is a right angle c. name a inscribed angle
December 3, 2007

math
8/9 x 1 1/5 x 10
December 3, 2007

science
Why does covering and refrigerating food help reduce spoilage from mould?
November 3, 2007

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