Sunday
May 1, 2016

Posts by erica

Total # Posts: 576

Calc
You need 50 pounds of two commodities costing $1.25 and$1.60 per pound. a) Verify that the total cost is y=1.25x + 1.60(50 - x), where x is the number of pounds of the less expensive commodity. b) Find the inverse function of the cost function.
December 6, 2010

Calc
Find the inverse of f(x) = (x+2)/x
December 6, 2010

Calc
Use the derivative to determine whether the function is strictly monotonic on its entire domain and therefore has an inverse function. f(x) = cos [(3x)/2]
December 6, 2010

Calc
Locate any relative extrema and inflection points. y = (ln x)/x
December 2, 2010

Calc
Use implicit differentiation to find dy/dx. ln xy + 5x = 30
December 2, 2010

Physics
What force is required to accelerate an object having a mass of 3 kg at 5 m/s2?
December 2, 2010

Binomial
Independent samples of n1 = 400 and n2= 400 observations were selected from binomial populations 1 and 2, and x1 = 100 and x2 = 127 successes were observed. What is the best point estimator for the difference ( p1-p2) in the two binomial proportions? a. -0.0675 b. -0.1250 c. 0...
November 24, 2010

Algebra HELP
How do I solve 2x-4=x-10?
November 17, 2010

eng
thank you, no i didn't see that the last time. i re-wrote both of the paragraphs instead of using you, i put them in plural form.
November 17, 2010

eng
the topic sentence in the first paragrhah is >Financing a car to purchase it can cost highly in interest rates. the topic sentence in the second paragrah is >When financing something there is interest that comes with purchasing it. Depending on credit status, interest ...
November 17, 2010

eng
i need to know if i underlined the correct topic sentence. if not can you see the topic with in the two paragraphs? 1. When purchasing a car, it can cost more than what it is worth because of not developing the money to buy it. Financing a car to purchase it can cost highly in...
November 17, 2010

english
thank you, no i didn't see that the last time. i re-wrote both of the paragraphs instead of using you, i put them in plural form.
November 17, 2010

english
it is the second sentence. the underline didn't show up. so i typed it out. does it look correct?
November 17, 2010

english
i need to know if my sentences and grammar are clear, and if i have the correct topic sentence for each paragraph correct. 1. If something will cost more than what it is worth because, you do not have the money to buy it is you can purchase it by financing it. Purchasing ...
November 17, 2010

ENGLISH
1.Purchasing something by financing it can cost you highly in interest rates. 2. When financing something you have interest that comes with purchasing it.
November 16, 2010

ENGLISH
I need to know if MY SENTENCES focus on one key point, The topic sentence relates to the paragraph as a whole, The content is comprehensive, accurate, and effective, Major points are stated clearly; are supported by specific details, examples, or analysis; and are organized ...
November 16, 2010

english
thank you, are the sentences clear and concise,well-constructed, and on topic? grammar and puncuations correct?
November 16, 2010

english
ok thank you i will try again. here are the underlined words. paragrahp 1. < u > text < / u>cost< u > text < / u>worth< / u>cost< u >interest rates, needed,debt,cash, interest or debt,choice, has interest or not. papragraph 2. finance, ...
November 16, 2010

english
i underlined the words but it didn't show up. here they are again. The paragraphs are related to the issue of how interest rates affect our purchasing decisions. The tone is appropriate to the content and assignment. Sentences are complete, clear, and concise. Sentences ...
November 16, 2010

english
Erica P. com/155interest rates • In a total of 200 words, write two paragraphs with about how interest rates affect our purchasing decisions. • Identify the topic sentence in each by underlining it. I need to know if I underlined all of the topic sententeces, They ...
November 16, 2010

adverbs adjectives in comparison Corr.3
1. Assignment: Review - Adjectives, Adverbs, and Comparison • Use at least five adverbs and five adjectives to write a 150- to 300-word review of a movie, sporting event, musical performance, or television show. • Bold each adverb. • Underline each adjective. &#...
November 13, 2010

adver adjectives in comparison corrected
thank you for all of your help i really appreciate it.
November 13, 2010

adver adjectives in comparison corrected
did this correct the run-on?One day, Miyagi witnesses one of the beatings. He intervenes and single handedly defeats Johnny and his friends.
November 13, 2010

adver adjectives in comparison corrected
ok
November 13, 2010

adver adjectives in comparison corrected
is this corrct? In the karate kid 1984, version the mentor Mr.Miyagi was more graceful, (comparative) than Mr. Han when it came to his way of teaching.
November 13, 2010

adver adjectives in comparison corrected
thank you, im a bit confused on how i should correct the run-on. can you tell me what is missing or how i should reword it?
November 13, 2010

adver adjectives in comparison corrected
1. Assignment: Review - Adjectives, Adverbs, and Comparison • Use at least five adverbs and five adjectives to write a 150- to 300-word review of a movie, sporting event, musical performance, or television show. • Bold each adverb. • Underline each adjective. &#...
November 13, 2010

adverbs,adjectives in comparison
thank you, how was my sentence structer?
November 13, 2010

adverbs,adjectives in comparison
t: Review - Adjectives, Adverbs, and Comparison • Use at least five adverbs and five adjectives to write a 150- to 300-word review of a movie, sporting event, musical performance, or television show. • Bold each adverb. • Underline each adjective. • Compare...
November 13, 2010

math
this math is so hard elp
November 8, 2010

physics
same here.I'm panicking because I don't understand anything in that class. Never again will I take physics online.
November 6, 2010

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

chemistry
mc(delta)T 50x1(100-37) =3,150
September 21, 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

earth
1. a 2. b
January 15, 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

4 grade FL social studies weekly
20th
October 9, 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

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