# Posts by ray

Total # Posts: 636

**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?

**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 ...

**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 ...

**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?

**economics**

true

**CALCULUS**

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

**CALCULUS**

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

**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..

**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

**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

**Chem**

Thanks!!!

**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

**english**

ITS d I just took test mere gossip

**english**

Try D

**Biochem**

Answer here

**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.

**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?

**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?

**edu**

ok thank you all for your help i really appreciate it

**edu**

because i wanted to be sure of my answers

**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 ...

**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 ...

**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?

**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 ...

**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.

**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

**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 ...

**edu**

that really doesn't say much

**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...

**edu**

I would go with B

**edu**

yes i read a little in the text

**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 ...

**edu**

ok thank you for your help

**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...

**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 ...

**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 ...

**edu..help ms sue**

yea

**edu..help ms sue**

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

**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-...

**edu/diversity**

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

**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 ...

**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. ...

**cultural diversity**

Linda Arriaga teaches at The Young Wonders Preschool. Which one of the following elements is likely to play the most prominent role in the school's child-centered philosophy and mission statement? A. Collaboration between teachers/staff and families B. Family participation...

**Math-Algebra**

10log(5x + 40) = 10

**Math-Algebra**

1) log(9 – x) – log(6 + x) = 1 2) e^2x + e^2x = 1 3) 2e^6x + e^6x = b

**college algebra**

please help me solve this equation x-1/3x-1/2x-5=0

**english**

Humpty Dumpty" tells the story about an egg that fell off a wall and broke. "Humpty Dumpty" is a __ poem. A.narrative B.free verse C.limerick D.nonsense Is it a narrative(a)

**edu**

Ms Sanchez is selecting a picture book to share with her two year olds. She will try to select a book with: a.few pictures so the story is lessened d. detail messages c.simple drawings d.fantasy type illustrations I think d not sure

**edu**

Which one of the following would NOT be a typical communication for a three year old ? a."Thats Scary b."I'm hungry c."Nobody likes carrots d.I wan cookies I think c not sure though

**edu**

Ms. Rook chose to develop her theme of life cycles around The Very Hungry Caterpillar by Eric Carle. She is using a.a thematic inquiry approach b.webbing c.a thematic/literature based approach d.a whole language learning Not sure between b and c i think c

**help please english**

what is a word that is in the ip family that means a baby bird. I have no clue need help

**Maths**

find range for g(X)= -cos4x

**math**

how much is 1/4 of 8 pies

**Physics**

The parachute on a race car of weight 8,810 N opens at the end of a quarter-mile run when the car is traveling at 34 m/s. What total retarding force must be supplied by the parachute to stop the car in a distance of 1,100 m?

**edu**

When a child is transitioning into your classroom, it is best for the child's first visit to take place: a.in the morning when the other children are arriving b.when other children in your class are on the playground c.during your circle time, so the child can meet all his...

**edu**

a teacher can be affectionate and still regard a child with objectivity,which is not possible for a parent. According to Katz this ____ is what distinguishes between mothering and teaching. a. scope of responsibility b. ambivalent attachment c. intensity of affect d. detached ...

**health**

the food group pyramid presents daily recommendations for: a.kind and amount of food to eat each day b.minimum amounts of nutrients needed c.amounts of each nutrient to consume daily d.maximum safe nutrient intakes Is it a? I am not sure

**HELPPPP**

business

**HELPPPP**

A______ is something a producer can do for a consumer I have no clue please help

**4th grade math**

Sam worked 36 hours in two weeks he worked twice as many hours in the second week as the first week how many did he work in the first week

**math**

Don't no

**Earlychilodhood education**

D is the best answer

**Basic Engineering2. Materials Science**

Oh never mind I figured it out.

**Basic Engineering2. Materials Science**

Boron is used to dope 1 kg of germanium (Ge). How much boron (B) is required to establish a charge carrier density of 3.091e7/cm^3. One mole of germanium has a volume of 13.57 cm^3 and weighs 72.61 gram. Give answer in grams of boron? I have no idea how to solve this problem. ...

**statistics**

Scores on an English test are Normally distributed with a mean of 78% and a standard deviation of 4.5%. Find the Value of the first quartile.

**Physics**

Thank you Elena!

**Physics**

The grams for Aluminum are 2.0e2 and the temperature for Aluminum is 2.2e2. The grams for water is 5.0e2.

**Physics**

I'm sorry for Aluminum its 0.215 and for Copper its 0.0922

**Physics**

And the answer that I have is wrong

**Physics**

A 1.0 102 g piece of copper at a temperature of 460 K and a 2.0 102 g piece of aluminum at a temperature of 2.2 102 K are dropped into an insulated bucket containing 5.0 102 g of water at 280 K. What is the equilibrium temperature of the mixture? (Use the specific heats found ...

**Calculus II**

Does the series ln/n^2 converge using the L'Hoptial's rule also. I know you can use the integral test but I have also seen others using the L'Hopital's rule on a very similar funciton ln/n^3 to see that it does converge.

**Physics**

Two people are talking at a distance of 3.4 m from where you are, and you measure the sound intensity as 1.0 10-7 W/m2. Another student is 4.2 m away from the talkers. What sound intensity does the other student measure?

**Physics**

A 5-m-long string, fixed at both ends, has a mass of 9 g. If you want to set up a standing wave in this string having a frequency of 298 Hz and three antinodes, what tension should you put the string under? I got 0.009kg(a984.68m/s)^2/5=7090 N it still says its the wrong answer

**Physics**

Your saying g=9.06

**Physics**

For some reason its still saying its the wrong answer

**Physics**

It still says its the wrong answer. Let me calculate it again

**Physics**

Imagine you are an astronaut who has landed on another planet and wants to determine the free-fall acceleration on that planet. In one of the experiments you decide to conduct, you use a pendulum 0.47 m long and find that the period of oscillation for this pendulum is 1.43 s...

**Physics**

Imagine you are an astronaut who has landed on another planet and wants to determine the free-fall acceleration on that planet. In one of the experiments you decide to conduct, you use a pendulum 0.47 m long and find that the period of oscillation for this pendulum is 1.43 s. ...

**Calculus**

F(x) = x^5 ln x A) Find the interval on which f is increasing Find the interval on which f is decreasing B) Find the local minimum value of f C) find the inflection point (x,y) Find the interval in which f is concave up Find the interval in which f is concave down

**Science- physics**

A 10 kg lawnmower is pushed along by a force applied at a 20* angle to the horizontal. If the mower accelerates at 3.4 m/s what is this force?

**Statistics**

Suppose there are two defective items in a pool of five items. You want to test one item at a time until you identify the second defective item. Find following probabilities a. You need four tests. (i.e. The second defective item will be found at the fourth test.) b. You need ...

**physics**

all the following are true about water except that it: a has a very high specific heat capacity compared to ther substances. b. takes a long time to heat up. c. takes a short time to cool off. d. makes the earths climates milder.

**Math**

Each equal side of an isosceles triangle is 3 1/2 inches longer than the base. The perimeter of the triangle is 2 feet. Find the length of its base.

**PHYSICS!!**

A plane drops a hamper of medical supplies from a height of 4190 m during a practice run over the ocean. The plane’s horizontal veloc- ity was 111 m/s at the instant the hamper was dropped. What is the magnitude of the overall ve- locity of the hamper at the instant it ...

**Physics**

Pt. 1 Gas in a container is at a pressure of 2.3 atm and a volume of 6.1 m3. What is the work done on the gas if it expands at constant pressure to five times its initial volume? Answer in units of J My wrong answer: 56.12 Pt. 2: What is the work done on the gas if it is com- ...

**Physics**

Pt. 1 Gas in a container is at a pressure of 2.3 atm and a volume of 6.1 m3. What is the work done on the gas if it expands at constant pressure to five times its initial volume? Answer in units of J My wrong answer: 56.12 Pt. 2: What is the work done on the gas if it is com- ...

**Physics**

Suppose you throw a 0.058-kg ball with a speed of 11.0 m/s and at an angle of 31.5° above the horizontal from a building 12.3 m high. (a) What will be its kinetic energy when it hits the ground? (b) What will be its speed when it hits the ground?

**Physics**

A) Gravity pulls an area of wet soil and rock downward in a landslide B) An ... Many people know that the weight of an object varies on different planets, but did ... If the Earth's gravitational force causes a falling 74 kg student to accelerate .... the acceleration of ...

**physics**

A fire hose ejects a stream of water at an angle of 31.5 ° above the horizontal. The water leaves the nozzle with a speed of 24.3 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit the highest possible fire?

**spelling**

Foist

**math**

a recipe that will make 3 pie call for 7 cups of flour. write a proportion and solve it to find how many pies can be made with 28 cups of flour

**physics**

A hot-air balloon is rising upward with a constant speed of 3.06 m/s. When the balloon is 9.31 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

**Ethis**

What is the historical and current impact of the biomedical issue in abortion?

**computer**

If int main() { int a=1; int *p; how do the following statements differ 1) p=&a; 2) *p=&a; 3) p=a; 4) printf("%d",p); 5) printf("%d",*p); and what does int **a mean

**physics**

The box decelerates at a rate of 3m/s and skids 24 meters becoming to a stop.How fast were you traveling when the box fell out.

**Chemistry**

The molar mass of Cl is 35.45 g/mol. What is the mass of the chloride atom in grams.?

**Physics - Center of Mass**

A baseball player uses a bat with mass mbat to hit a ball with mass mball. Right before he hits the ball, the bat's initial velocity is 36 m/s, and the ball's initial velocity is -20 m/s (the positive direction is along the positive x-axis). The bat and ball undergo a ...

**math**

Describe how you can use a number line to order the fractions 3/7, 5/7 and 1/7 from least to greatest.

**MATH**

You have 43 marbles. You divide them equally among some sacks. How many sacks must you use to get fewer than 8 marbles in each sack?

**physics**

what is the mass of a playset that is moved with 580n of force for 11 seconds at 1.5 m/s?