# Posts by Annie

Total # Posts: 830

**science**

Why can we see ourselves in a mirror but not a wall

**science**

How do you calculate field of view

**Math**

The class with the greatest mean sales in a spring fundraiser will win a prize. The mean for Eric's class is $148. The mean for Natalia's class is $152. Natalia's sales total $150. If Natalia moves to Eric's class, the mean for each class increases. Explain why?

**algebra**

let the numbers be x, y, z 2x=y+z+11 2x-y-z=11 2x+3z=y+1 2x-y+3z=1 y=x+z -x+y-z=0 2x-y-z=11-------------- 1 2x-y+3z =1--------------2 -x+y-z= 0-------------- 3 consider equation 1 &2 Multiply 1 by -1 Multiply 2 by 1 we get -2x+y+z =-11 2x-y+3z =1 Add the two 4z=-10...

**English**

aside from any grammar or spelling mistakes how is this essay! Can the perfect ideal of loyalty ever be achieved? With no guidelines how can you match a book definition of loyalty. Loyalty is essential in human life, but what is it. The dictionary will describe loyalty as ...

**SP180.1.2 Principles of Public Speaking**

SP180.1.2 Principles of Public Speaking i need help with my outline. not sure where to go from here. I. TITLE: Bullying in schools A. General Purpose: To persuade B. Specific Purpose: To persuade my audience that bullying in schools need to be stopped C. Central idea: The ...

**Math**

A circular swimming pool has a diameter of 7.4m, and a height of 2.4m. What is the volume of the pool?

**Math**

will it be 824.25

**Math**

I went on that website but I don't understand it

**Math**

How do you calculate the surface area of a cylinder when the diameter is 15cm and the height it 10cm

**Math**

b) The median of 15,17,13,19,20,33,22,18 and __ is 18.5 . Is it possible the determine the missing value?

**Chemistry**

thanks

**Chemistry**

how would you do this question when i did it i did -log(1.0) but that is just 0 so what it the procedure to do this question Calculate the pH of a 1.0 mol/L aqueous solution of sodium benzoate. Note: Only the benzoate ion affects the pH of the solution.

**Lone Peak High**

How much of a stock (18.5 M) HCl solution would be required to make 100mL of 0.025 M HCl?

**Science**

That's what I'm thinking..

**Science**

So 35 x 9.8 = 343 N 343 x 3.0 = 1029 J Is that the answer to A or B, I'm a bit confused

**Science**

a)How much work is required to lift a 35-kg object from the ground 3.0 m into the air? b) How much gravitational potential energy did this object gain?

**Science**

Calculate the work done in each of the following situations. a) A horse pulls a wagon with a force of 1200 N and moves it 15 m. b) A cable lifts an elevator 16 m by using a cable with a tension force of 2500 N.

**science**

When you do work to lift an object, what form of energy does the object gain

**Science**

An object has a mass of 5.0 kg on the surface of the Moon. What would be the object's: a) mass on Earth b) force of gravity on Earth

**Health**

help**

**Health**

What is Marijuana ? Can you get cancer from Marijuana ? Is it good or bad for you? I need h

**Language**

I need help answering this question.. How did you or your family deal or cope with these issues? These are the social justice issues i came up with : Poverty, Alcohol & drinking, violence, racism, and lack of human rights.. I know it's my own opinion but I don't know ...

**Math**

A) temperature readings taken over five years

**Math**

State the types of graphs that you could use to present each set of data below.Which type of graph do you think is most appropriate? Data

**History**

Ontario,Quebec,Nova Scotia and New Brunswick

**History**

Explain why some british politicians thought it would be good for Great Britain to keep the colonies?

**History**

in which ways did the colonies of British north america benefit from the intercolonial railways

**English**

No just an essay not a life story

**English**

What's a good title for a mother Teresa essay?

**Science**

The meter per second squared is the unit of Acceleration. My answer is a, acceleration.

**English**

Thank you.

**English**

What does this sentence mean? It was a rainy season which caused the river to be swollen.

**Math**

Jane has a set of green, black and yellow pens. The green pens make up 1/3 of the set, the set has 5 black pens, the yellow pens is twice the number of black pens. How many pens are in Jane set?

**Science**

i don't understand

**chemistry**

if 21.54 grams of caco3 is added to an ecxess of HCl in the equation Cacl3+2Hcl produces Cacl3+co2+H20, what mass does co2 produce?

**math**

The deck of a swimming pool had the same width all the way around. The perimeter of the pool is 50m. The outside perimeter of the deck is 74m. What is the width of the deck?

**math**

How do I find the number of millimeters long a beak is?

**physics grade 10 icse**

two balls of masses in ratio 1:2 are dropped from the same height find : a. the ratio between their velocities when they strike the ground and b. the ratio of the forces acting on them during motion

**Math**

Mr. Garcia bought 8 cars at 52 each for a total of 416. He bought 11 planes (3 more planes than cars) at 38 each (52-14) for a total of 418. Add 416 to 418 and there is 834 total.

**Art - Help ASAP!!**

i checked the website but its not there

**Art - Help ASAP!!**

how many years does it take to finish the course sculpture at OCAD university??

**Need Math Help Please**

in probability why are tree diagrams more useful than to use tables ?? please explain to me in a paragraph so i understand completely and could you please show me an example where i would have to use the tree diagram, and why i couldn't use a table???

**Need math help please**

could someone please give me an example not an example using coins, marbles, spinner, like something different that would explain the difference b/w theoretical and experimental probability.

**Math Help**

could someone please give me an example not an example using coins, marbles, spinner, like something different that would explain the difference b/w theoretical and experimental probability. And please explain.

**Math Help**

in probability why are tree diagrams more useful than to use tables ?? please explain to me in a paragraph so i understand completely and could you please show me an example where i would have to use the tree diagram, and why i couldn't use a table???

**Math help understand**

Have world problem and I don't get it please explain step by step simplify and show me as many ways as possible cause one might be easier than other !! A bicycle travels at constant speed of 15km/hr. Bus starts 195km behind bicycle and catches up to bicycle in 3 hrs. What...

**science pls help**

True or False 1. If a 40 kg person is accelerating at 10 m/s2, then the magnitude of the force acting on him or her is 400 N. (1 point) true false Multiple Choice 2. How much force is needed to make a 60 kg object accelerate at a rate of 2.0 m/s2? (1 point) 62 N 62 kg 120 N ...

**CHEMISTRY**

When 6.724 g of one of the hydrates of sodium sulfate (Na2SO4) was heated to drive off its water of hydration, the residue of anhydrous sodium sulfate has a mass of 2.964 g. What is the value of x in the formula for the hydrate, Na2SO4•xH2O?

**CHEMISTRY**

Thank you so much!

**CHEMISTRY**

A lawn fertilizer is rated as 6.50% nitrogen, meaning 6.50 g of N in 100 g of fertilizer. The nitrogen is present in the form of urea, (NH2)2CO. How many grams of urea are present in 100 g of the fertilizer to supply the rated amount of nitrogen?

**English**

yea like wth Ms. Sue

**Calculus**

I need help finding the derivative of √3x/(x^2-4) at x=3

**Statistics in Psychology**

A researcher finds that the correlation between variable A and variable B is r= 5 1.20. She also finds that the correlation between variable C and variable B is r= 5 2.40. Which relationship is scientifically more useful and by how much?

**Statistics in Psychology**

What research steps must you go through to use the relationship between a person’s intelligence and grade average in high school so that, if you know a person’s IQ, you can more accurately predict the person’s grade average?

**INF 103**

Digital literacy is a skill that is important for: utilizing computers effectively. counting numbers reading digits. hacking computer information.

**Connexus, Civics, History**

Oh so you used to be a teacher?

**Connexus, Civics, History**

Isnt that what this websites for?

**Connexus, Civics, History**

Please some answer them for me T_T

**Connexus, Civics, History**

Help with civics "What are the Rights of the Accused"? 1. The Supreme Court ruled in re Gault that people... A. that are under arrest must be read their rights by law enforcement. B. who cannot afford an attorney must be provided one by the state. C. accused of ...

**Statistics in Psychology**

Please help. Thank you in advance for your time. In an English class last semester, Foofy earned a 76 (x¯= 85, Sx= 10). Her friend, Bubbles, in a different class, earned a 60 (x¯= 50, Sx = 4). Should Foofy be bragging about how much better she did? Why?

**Statistics in Psychology**

Please help with this question, THANK YOU in advance. A line should be over the top of both X’s. In an English class last semester, Foofy earned a 76 (X = 85, Sx = 10). Her friend, Bubbles, in a different class, earned a 60 (X=50, Sx = 4). Should Foofy be bragging about ...

**Statistics in Psychology**

Please help me with both of these questions. THANK YOU in advance for your for you help. 13. For the data, 9 5 10 7 9 10 11 8 12 7 6 9 (a) Compute the z-score for the raw score of 10. (b) Compute the z-score for the raw score of 6. 14. For the data in question 13, find find ...

**Chemistry**

Write a balanced equation to describe the following reactions: a) C14H30 is cracked to produce ethene, hydrogen and one other compound b) C16H34 is cracked to produce ethene and propene in a 2:1 ratio and only one other compound Thanks:)

**How to do this problem fast**

8%. Because -> percentage change = new-old/old x 100 so 0.68/8.50 x100 Hope this helps :)

**math**

If the rectangles width is trippled and its length is doubled the perimeter of the new rectangle is 92 centimeter greater than the original perimeter what is the area of the original rectangle?

**math**

If the rectangles width is trippled and its length is doubled the perimeter of the new rectangle is 92 centimeter greater than the original perimeter what is the area of the original rectangle?

**calc and Vectors**

A wire 60 cm long is to be cut into two pieces. One of the pieces will be bent into the shape of a square and the other into the shape of an equilateral triangle. The wire is to be cut in order that the sum of the areas of the square and the triangle is to be a maximum. An ...

**Calc and Vectors**

The owner of an orange grove estimates that 150 orange trees per acre will each yield on average 800 oranges per year. For each additional tree planted per acre the number of oranges produced by each tree decreases by 10 per year. How many trees should be planted per acre in ...

**Calculus and vectors**

A cylindrical tank is to have a capacity of 1000 m³. It is to fit into a foundry that is 12 m wide with a height of 11 m. The base of the tank will cost half as much as the top. The metal for the side of the tank will cost four fifths as much as the top. An equation that ...

**Math**

Fencing costs 29$ per meter what is the cost of fencing a rectangular swimming pool if the fenced area is to be 16 m long 9 m wide.

**geometry**

what is the algebraic rule for x=4,y=1;x=6,y=1;x=8,y=2;x=10,y=2;x=12,y=3;x=14,y=3;x=16,y=4;x=18,y=4...

**math**

Sherry is playing the integer game and is given a chance to discard a set of matching cards. Sherry determines that if she discards one set of cards her score will increase by 12. If she discards another set, then her score will decrease by eight. If her matching cards make up...

**us hist**

c is correct

**staistics, is it right?**

Find the mean, the median, and the mode for the following data. 21 21 22 22 22 26 34 Mean 335.1 rounded to 335, median 22, mode is 22 could someone tell me if I got this right?

**statistics**

Find the mean, the median, and the mode for the following data. 21 21 22 22 22 26 34 Mean 335.1 rounded to 335, median 22, mode is 22

**statistics**

I have to find mean, median and mode did I do this right? 21,21,22,22,22,26,34

**math geometry**

how can i prove in geometry proofs that something is a midpoint of a line? thanks

**english**

not sure but prepositional phrase with a gerund?

**english**

__present participial phrase __nominative absolute __appositive __past participial phrase __prepositional phrase with a gerund

**english**

By serving as a popcorn vendor sorry

**english**

What grammatical structure is the italicized portion of the sentence? By serving as a popcorn vendor, Don saw many good games. appositive?

**English**

Select the correct noun clause in the sentence below. Then choose the function of the noun clause. The detective asked me if I had heard any strange noises the night before. Noun clause: if I had heard any strange noises the night before. function of clause: direct object

**English**

Thank you once again.

**English**

Which of the following sentences does not have a subordinate adjective clause? ___The poem, which Peg wrote for me, was good enough to print. _x_He made some statements, and they had no foundation of fact. ___Gerry won a swimming pool trophy of which he is very proud.

**English**

What is a subordinate clause?

**English**

Thanks again. (:

**English**

1.adjective 4.adjective 5.noun ?

**English**

Choose the function of the italicized infinitive phrase. 1.May I have permission to use the car tonight? 2.He went to Europe to study architecture. 3.I want to go with you to the store. 4.Can you give me a place to put my things? 5.To help you is my greatest desire. 6.Meredith...

**English**

thank you!!!!

**English**

So 5. Subject? 6.Predicate noun?

**English**

What is the gerund phrase and noun function of the gerund in these sentences: 1.Brett earns his income by repairing cars. 2.I enjoy playing the piano. 3.Her favorite pastime is entertaining friends. 4.She is successful in mimicking others' voices. 5.He must like studying ...

**3rd grade Math**

If Beth has 28 feet of trim to use as edging on a rectangular blanket, what is the length and width of two blanket sizes she could make?

**science**

Need help with those same questions.. please help!!

**english**

An occurrence at Owl Creek bridge compare and contrast to After Twenty Years

**biology**

Explain how new species can originate without geographical barriers.

**Calculus**

Find the volume of the solid obtained by rotating the region under the graph of the function f(x) = (2)/(x+1) about the x-axis over the interval [0,3]

**Calculus**

Find the area of the shaded region bounded by y=7x and y=x(sqrt(22^2-x^2))

**Chemistry**

Carbon tetrachloride has an enthalpy of vaporization of 29.82kj/mol. If CCl4 has a normal boiling point of 350k, what is its vapor pressure at 273k? (R=8.31 J/molK)

**Chemistry**

What is the vapor pressure of CH4 at 1 atm and 298k?