# Posts by ray

Total # Posts: 594

**math**

Jake and Sara each drive 270 miles to attend a conference. Jake drives at an average speed that is 15 mi/h slower than Sara’s average speed. It takes Jake 1.5 hours longer than Sara to drive the 270 miles. How long does it Jake to make the trip?

*May 12, 2014*

**Science**

henry can you explain to me how you got that answer i don't understand?

*April 30, 2014*

**Statistics**

Thank you!

*April 20, 2014*

**Statistics**

Recently, a university surveyed recent graduates of the English Department for their starting salaries. Four hundred graduates returned the survey. The average salary was $25,577. The population standard deviation is $2,566. What is the 95% confidence interval for the mean ...

*April 20, 2014*

**Statistics**

Thank you!!

*April 20, 2014*

**Statistics**

A survey of an urban university (population of 25,450) showed that 878 of 1,119 students sampled supported a fee increase to fund improvements to the student recreation center. Using the 95% level of confidence, what is the confidence interval for the proportion of students ...

*April 20, 2014*

**Statistics**

Thank you!

*April 20, 2014*

**Statistics**

Mileage tests were conducted on a randomly selected sample of 100 newly developed automobile tires. The results showed that the average tread life was 52,515 miles with a standard deviation of 3,550 miles. What is the best estimate of the average tread life in miles for the ...

*April 20, 2014*

**math**

manuel and ruben played dominoes 24 times. Ruben has won 16 times. estimate the odds in favor of Manuel's winning the next match.

*April 17, 2014*

**physics**

Is there a way to calculate the moment of inertia of a hanging mass (3.1 kg) without length & width dimensions?

*April 1, 2014*

**man**

How to -2x+6y=-26 8x+6y=-1 6using elimination method

*March 24, 2014*

**math**

bill and jane are 1080 miles apart. They start driving towards each other at exactly the same time. Bill travels at 70 mph. Jane travels at 65 mph. How long must they drive before they meet?

*March 19, 2014*

**Algebra 2B**

1. A 2. D 3. B 4. B Correct answers. Put these in and you will receive full credit.

*March 17, 2014*

**poetry part 2**

I think it b It's not c

*March 2, 2014*

**Statistics**

The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable - one three-digit number wins $600 and all others win nothing - that gamblers never reach "the long run." Even after many bets, ...

*February 25, 2014*

**Statistics**

The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable - one three-digit number wins $600 and all others win nothing - that gamblers never reach "the long run." Even after many bets, ...

*February 25, 2014*

**Statistics**

A class survey in a large class for first-year college students asked, "About how many minutes do you study on a typical weeknight?" The mean response of the 463 students was x = 118 minutes. Suppose that we know that the study time follows a Normal distribution with...

*February 25, 2014*

**physics**

A block with a mass of 1.0kg is lifted up slowly from ground (0m) to height of 0.51m. block is slowly displaced horizontally by .10m. find total work done to displace block vertically and horizontally. Then find total work to lift block and move it horizontally.

*February 16, 2014*

**Math**

A truck with 40-in.-diameter wheels is traveling at 50 mi/h. a) Find the angular speed of the wheels in rad/min b) How many revolutions per minute do the wheels make?

*February 11, 2014*

**Physics**

A trash can with a mass of 5 kg has a coefficient of static friction of μs = 0.80 and a coefficient of kinetic friction of μk = 0.22. (The Active Figure applies to a similar situation, but the values of the mass, coefficient of static friction and coefficient of ...

*February 8, 2014*

**Physics**

Suppose a hockey puck slides down a frictionless ramp with an acceleration of 4.70 m/s2. (a)What angle does the ramp make with respect to the horizontal? (b) If the ramp has a length of 6.40 m, how long does it take the puck to reach the bottom? (c) Now suppose the mass of the...

*February 6, 2014*

**Physics**

Suppose a hockey puck slides down a frictionless ramp with an acceleration of 4.70 m/s2. What angle does the ramp make with respect to the horizontal? Please show steps...

*February 6, 2014*

**US History**

ok is there any other questions i posted you can answer?

*January 8, 2014*

**US History**

i don't have my book and i have tried looking it up on the internet but it aint answering my questions

*January 8, 2014*

**US History**

i need help on the answers i was out sick the week we did this lesson and im clueless on it

*January 8, 2014*

**US History**

i really need help with this study guide 30.) Franklin D. Roosevelt became president during the Great Depression and established the New Deal in attempts to help the country recover. The New Deal was made up of several programs that are often times nicknames the alphabet soup ...

*January 8, 2014*

**English**

1.the trip led to an argument between Helen and ____ a.I b.me 2. It was ____ who demanded an apology from the newspaper. a.we b.us 3. We appreciated ____ writing a personal letter to explain his stand on the issue. a.his b.him 4. The most outspoken critics were my sister and ...

*December 6, 2013*

**social studies**

Where can I find a good, reliable source on the internet about the Bermuda Triangle? I would like a PDF with at least a few pages and I specifically am looking for scientific explanations. Sites that end with edu or gov would be great. I have been searching the internet for ...

*December 3, 2013*

**English**

Sorry my iPad did that by itself

*November 23, 2013*

**English**

Is it passive or active voice? Many clothes (we're given) to the homeless shelter. Passive By the end of today, the students (will have mastered) the grammar. Active My aunt Margot ( has been traveling) with her daughter. Active The cookies (have been eaten) by the guests...

*November 23, 2013*

**pyschology**

Thanks for your response, Ms.Sue. But I still Don't know how to relate that to clothing. Can you please explain a bit more?

*November 22, 2013*

**pyschology**

Define what prototype is and give four examples of prototype for the category of 'clothing' I know a prototype is a typical member of a particular category, but i Don't know what would be examples for prototype in terms of clothing... Would be it: tshirt, pants, ...

*November 22, 2013*

**Math**

Jay can deduct the amount over 7% of his gross income as medical expenses on his income tax return. If his annual salary is $18500 and his medical expenses one year were $1450 how much could he deduct on his tax return?

*November 11, 2013*

**Chem**

4.5 X 10^-12m

*October 23, 2013*

**physics**

Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 17.5 kg and an initial velocity of = 8.50 m/s, due east. Object B, however, has a mass of mB...

*October 10, 2013*

**URGENT ALGEBRA 2**

well yeah but ive had this question on a past test and i don't know the answer and i keep getting it wrong can you please help me answer it correctly?

*October 4, 2013*

**URGENT ALGEBRA 2**

identify the vertex and the axis of symmetry of the graph for the function y=3(x+2)^2 a.vertex(2,-3 axis of symmetry x=2 b.vertex(-2,-3) axis of symmetry x=-2 c.vertex(2,3) axis of symmetry x=2 d.vertex(-2,3) axis of symmetry x=-2 identify the maximum or minimum value and the ...

*October 4, 2013*

**algebra**

constraints x greater than or equal to 0 y less than or equal to 8 y greater than or equal to x y greater than or equal to -1/2x+6

*October 3, 2013*

**algebra**

what is the minimum value for z=3x-1/2y over the feasibility region defined by the constraints? a.-4 b.-5 c.-3 d.-6

*October 3, 2013*

**Math**

squareroot of 8 * exponents 3

*October 2, 2013*

**history**

compare the purpose, audience, and styles of John Winthrop and Johnathan Edwards.

*September 19, 2013*

**math**

what is f(-3) if f(x)=[2x+1]+5 0 10 12 -10

*September 17, 2013*

**math**

so (2+3)(4)=2*4+3*4=6+12=18 would be a possible answer to this question?

*September 17, 2013*

**math**

Write an algebraic expression that requires each of the following properties of real numbers to simplify, in the order given: the Distributive Property, the Associative Property of Addition, the Commutative Property of Addition, and the Distributive Property. Simplify the ...

*September 17, 2013*

**english 11**

yyay i got it right thanks so much

*September 11, 2013*

**english 11**

i got it its native american oral tradition

*September 11, 2013*

**english 11**

the statement below represents which genre from the early american and colonial period? i want to explain origins of the natural origins of the natural world and its processes.(1 point) a.the poetry of anne bradstreet b.the oral tradition of native americans c.the journals of ...

*September 11, 2013*

**us history**

when i write my thesis statement where do i put it in my paper? is it the first line of paper or what?

*September 10, 2013*

**social studies**

i have look and read over everything in my book number 3 i think i got it but the other 2 im clueless

*September 5, 2013*

**social studies**

1. Explain two ways in which sectionalism caused conflict or tension in the United States during the early 1800s. Then explain how sectionalism affects economics and politics in the United States today. 2. which was more of a priority in presindents lincolns reconstruction ...

*September 5, 2013*

**math**

1. write the equation in slope-intercept form. what are the slope and y-intercept? -9x+10y=-9 2. what is the graph of the equation? -5x+y=-3 please help on these a.s.a.p thansk guys

*September 4, 2013*

**Math**

Jdujs

*August 28, 2013*

**Calculus (help steve)**

i had trouble with this problem too

*June 28, 2013*

**Set and relations**

Help me understand: {5} is a subset {0,2,5} The way I read it is the only element in {5} is 5 and it is a member of the set {0,2,5}. I s this true?

*June 1, 2013*

**math**

looking for the pattern in these sequences: -2,-1,4,1,4,9,14,27,_,_,_,_

*May 31, 2013*

**math**

looking for the pattern in these sequences: -2,0,1,4,4,8,_ , _ , _, _, and so forth

*May 31, 2013*

**math**

A poll of 100 students was taken at a no-residential college to find out how they got to campus. The results were as follows: 28 said car pools;31 said buses;and 42 said they drove to school in their own car alone. In addition, 9 used both car pools and buses;10 said both car ...

*May 31, 2013*

**math**

Tickets to a show cost $10 for adults and $5 for children. The show was sold out, and the theatre has 500 seats. If the revenue collected from these ticket sales was $2900, how many adult tickets were sold?

*May 31, 2013*

**physics**

An eyepiece is made of two positive thin lenses, each of focal length f = 20 mm, separated by a distance of 16 mm. (a) Where must a small object viewed by the eyepiece be placed so that the eye receives parallel light from the eyepiece? (b) Does the eye see an erect image ...

*May 29, 2013*

**optics**

A thin, double-convex lens has a refractive index of 1.50. The radius of curvature of the front surface is 15 cm and that of the rear surface is 10 cm. See sketch. (a) How far from the lens would an image of the sun be formed? (b) How far from the lens would an image of a toy ...

*May 29, 2013*

**chem word problem**

.If a gas is cooled from 323.0 K to 273.15 K and the volume is kept constant, what final pressure would result if the original pressure was 750.0 mm Hg? Round to the nearest tenth. Don't forget the units. what should i plug in?

*May 23, 2013*

**economics**

true

*May 23, 2013*

**CALCULUS**

Lim x->4 (x^2+3x+4)/5x-12

*May 8, 2013*

**CALCULUS**

Lim x->4 (x^2+3x+4)/5x-12

*May 8, 2013*

**CALCULUS**

lim x->2 f(x) where f(x) = { x^2-x-2/ 3x-6 , x<2 } {-1 , x=2 } {x+2/4 , x>2} is f(x) continuous at x = 2 ? explain..

*May 8, 2013*

**MATH**

Solve the differential equations? (calculus) a) square root cotany/ (1+x^2)sin^5y dy/dx = e^x^3 +3x/ square root cotany b) y^2/cosx dy = e^sinx/ e^y^3-1 dx

*May 8, 2013*

**Chem**

Citric acid (H3C6H5O7) is triprotic acid which reacts with NaOH according to the balanced chemical equation shown below what volume of 0.200m Naoh is required to titrate 7.50ml of lemon juice which is 0.245 m in citric acid? H3C6H5O7+3NaOH->Na3C6H5aO7+ 3H2O

*April 21, 2013*

**Chem**

Thanks!!!

*April 21, 2013*

**Chem**

A mixture of He Ne and 3rd gas exhibit a total pressure of 486 mm hg if the partial pressure of He125mm mm hg and partial pressure of Ne is 214mm hg what is the mole fraction of the 3rd gas in container

*April 21, 2013*

**english**

ITS d I just took test mere gossip

*April 16, 2013*

**english**

Try D

*April 16, 2013*

**Biochem**

Answer here

*April 3, 2013*

**Chemistry**

Calculate the heat released when 454 g of steam at 100.0C condenses and then cools to 30.0C. State your answer in calories.

*April 3, 2013*

**chemistry**

The pH of a .10M HOBr solution is 4.8 1. What is [H+] in that solution? 2. What is [OBr-]? What is [HOBr]? (where do the H+ and OBr ions come from?) 3. what is the value of Ka for HOBr? what is the value for pKa?

*April 2, 2013*

**physics**

A battery with an emf of 14.5 V and internal resistance of 0.83 Ω is connected across a load resistor R. If the current in the circuit is 0.81 A, what is the value of R?

*April 1, 2013*

**edu**

ok thank you all for your help i really appreciate it

*March 26, 2013*

**edu**

because i wanted to be sure of my answers

*March 26, 2013*

**edu**

my text says Use mentalinguistic strategies to talk explicitly about the concept of prints: "This first page is the beginning of the book." "Let's turn to the next page." "This page has lots of words in it." "Who can guess what the words ...

*March 26, 2013*

**edu**

Emergent literacy skills are enhanced by a.quantity and quality of print and audio-visual resources b. the family socio-economic status and aspirations c.engaging in literacy event with other persons especially adults d. the educational or professional level of one or both ...

*March 26, 2013*

**geography**

hurricanes and cyclones originate: a.in the tropics b.in temperate latitudes c.near the poles d.in the center of large land masses Is the answer a?

*March 25, 2013*

**physics**

A hypodermic syringe is attached to a needle that has an internal radius of 0.303 mm and a length of 3.02 cm. The needle is filled with a solution of viscosity 2.00 10-3 Pa · s; it is injected into a vein at a gauge pressure of 16.1 mm Hg. Ignore the extra pressure ...

*March 22, 2013*

**physics**

At the surface of a freshwater lake the pressure is 102 kPa. (a) What is the pressure increase in going 34.7 m below the surface? b) What is the approximate pressure decrease in going 33 m above the surface? Air at 20° C has density of 1.2 kg/m3.

*March 22, 2013*

**edu**

By text states what i posted above. I am just willing to understand why the answer is C because i was leaning toward B

*March 9, 2013*

**edu**

The middle-class preference for relatively small nuclear families consisting of mother, father,(or a single mother),and two or three children, is unusual when compared with families from most other non-European backgrounds. Most cultures include maternal or paternal ...

*March 9, 2013*

**edu**

that really doesn't say much

*March 9, 2013*

**edu**

Which of these scenarios best describes a nuclear family? A) Jeremiah is growing up within a cluster of adults and children who maintain their own living quarters but come together for work and meals. Child-rearing is a shared responsibility. B) The Farrish family is comprised...

*March 9, 2013*

**edu**

I would go with B

*March 8, 2013*

**edu**

yes i read a little in the text

*March 8, 2013*

**edu**

A 1992 finding by researchers Dickinson et al. about the language prompts used by low-income caregivers revealed a need for training in: A. approaches for eliciting more referential language and labels. B. expanding question formats to obtain a child's elaborations and ...

*March 8, 2013*

**edu**

ok thank you for your help

*March 8, 2013*

**edu**

A parent from a non-mainstream culture complains to the program director that her son is being negatively singled out by his teacher. The director would do well, as a first step, to address the complaint by: a. backing the teacher's position and action b. setting a meeting...

*March 8, 2013*

**edu**

Which statements best express the strategy of semantic extension? a. The teacher uses redundancy to teach new vocabulary b. A mother says the same word twice in succession when speaking to her child c. Semantic extension involves the repetition of words & sentences, recasting ...

*March 7, 2013*

**edu**

7.Which one of the following conditions Fails to foster good communicative interaction in an early learning setting? a. The teacher repeats every thing a child says, but in the proper English form. b. At least during the time the child is in the early care environment, the ...

*March 7, 2013*

**edu..help ms sue**

yea

*March 7, 2013*

**edu..help ms sue**

i was saying the same thing. this question makes no sense

*March 7, 2013*

**edu..help ms sue**

A young Asian child would probably be less inclined to engage in backchanneling than a middle-class American child does because: a.he or she incorporates both verbal and nonverbal responses b.middle-class children are taught and expected not to engage in backchanneling c.non-...

*March 7, 2013*

**edu/diversity**

Or B. for the second question..I'd go with B.

*March 7, 2013*

**edu/diversity**

With growing concern and intake of information , a child may not be able to put new details into former mental bins and concept groups. When this occurs, a search for_____is stimulated a. coherence b. rules c. consonance d. definition Would A be appropriate Which one of the ...

*March 7, 2013*

**cultural diversity**

Child-rearing practices in which children are expected to sleep alone, toddlers are epected to self-feed, and preschoolers are encouraged to compete and/or do their best are likely to be contrary to beliefs and practices held by parents and guardians who belong to a/an: A. ...

*March 5, 2013*