Tuesday
October 21, 2014

Posts by Emily


Total # Posts: 2,341

math
the blueprint for landscaping a yard has a scale of 1/2'' to 1 foot.If the blueprint is a rectangle 18 inches by 22 inches, what are the dimensions of the yard?
August 29, 2013

Math
1) evaluate without a calculator: a)sin(3.14/4) b) cos(-3(3.14)/4) c) tan(4(3.14)/3) d) arccos(- square root of three/2) e) csctheata=2 2) verify the following identities: a) cotxcosx+sinx=cscx b)[(1+sinx)/ cosx] + [cosx/ (1+sinx)]= 2secx c) (sin^2x + 2sinx+1)/cos^2x= (1+sinx...
August 22, 2013

Math
1) What is the amplitude, period, horizontal shift (relative to basic function), and vertical translation of the following: a) -3cos(x+ 3.14/4) and b) 2sin(x-3.14/2)+3 2) evaluate the following expressions: a) log2 cubed root of 16 b) log25 (1/125) c) e^2ln5 d) ln 1/the cubed ...
August 22, 2013

chemistry
what is the concentration of a 250 ml solution that contains 44 grams of magnesium fluoride
August 21, 2013

chemistry
during an experiment, 20 ml of 4 M hydrochloric acid is mixed with 30 ml of water. what is the concentration of your new solution
August 21, 2013

Physics
One long wire carries current 26.0 A to the left along the x axis. A second long wire carries current 68.0 A to the right along the line (y = 0.280 m, z = 0). Where in the plane of the two wires is the total magnetic field equal to zero?
August 15, 2013

math
what is the cost of 3 notebooks at 20% discount, a binder at 25% discount, and 2 pens. 1 notebook: $1.79 1 pen: $2.89 1 Binder: $3.19
August 11, 2013

Math
When a ball is thrown in the air at 15mps from a height of 1 ft, how long does it take for the ball to hit the ground?
July 15, 2013

RE
I have to draw upon the Christian parallels within the story of The Lion, the Witch and the Wardrobe. I have found information on all the characters other than the beavers. could anyone shed some light on this. thanks
July 14, 2013

writing
1)whose
July 11, 2013

Written Communication
I was stuck between bigamy and misogyny. I'm leaning more towards bigamy now, after some internet researching.
July 11, 2013

Written Communication
misogyny (hate against women; ex: domestic violence against women?) That's what I think.
July 11, 2013

Chemistry AP
The numbers are different, so I will remember to post them next time.
July 11, 2013

Chemistry AP
OH I GET IT NOW, the canceling of units This is great. Thank you again.
July 11, 2013

Chemistry AP
(Oh yeah, sorry about the sign, and I forgot a bracket after that perentices, I meant to say "what are the temperatures in Kelvin?".) I'm sorry for my slowness, I'm actually learning from the textbook without any teacher guidance, so I can't ask a teacher...
July 11, 2013

Chemistry AP
Oh and sorry, 10.12 mL or 10.12 cm^3
July 11, 2013

Chemistry AP
Yes. I understand the degree difference that they are asking for, but I'm having trouble with calculations. They give me the numbers 200.0 F and -100.0F and when I convert those to celcius, I think the significant numbers for each answer should have 4 significant answers. ...
July 11, 2013

Chemistry AP
Also it would be nice to see multiple ways, so do you think you could show me the other way in which the problem asks for the use of mass perecent of copper= (mass of copper/total) x100?
July 11, 2013

Chemistry AP
I don't quite understand why you multiplied 10.501 (density of silver) by (1-x). And what was the point of the problem talking about "assume that the volume of silver present plus the volume of copper.."? Thanks for your help Steve
July 11, 2013

Chemistry AP
I'm using Zumdahl 7th Edition Chemistry Book and I'm having trouble with some practice problems in the first chapter. Here are a few: 87: Sterling silver is a solid solution of silver and copper. If a piece of a sterling silver necklace has a mass of 105.0 g and a ...
July 11, 2013

Math
If 1 more than a certain number is 3 less than a second number, the larger of these numbers minus the smaller is equal to?
July 1, 2013

Math
Oatmeal Recipe: Water 3/4 cup Salt: 1/4 teaspoon Oats: 1/3 cup If the least possible multiple of the recipe above is prepared so that a whole number of cups of both water and oats are used, how many teaspoons of salt would be required?
July 1, 2013

Math Gr 11
"A rock is dropped from the edge of a 180 m cliff. the function f(x) = -5t^2 - 5t + 180 gives the height of the rock, h(t), in meters t seconds after it was released. How long does it take for the rock to reach a ledge 80 m above the base of the cliff?" I have no ...
June 20, 2013

Math
an algorithm word problem
June 3, 2013

geometry
450 cm3
May 23, 2013

first additional language
how did youth day came?
May 19, 2013

math
what is the rule of the input output table input 2 output 11 input 3 output 15 input 5 output 18 input 8 output? what is the rule?
May 15, 2013

C/Justice
it could be B.
May 9, 2013

C/Justice
The inmate code is: A. the set of rules for inmate behavior established by prison officials. B. an informal set of rules of inmate behavior that is part of the prison culture. C. a secret language inmates use to communicate with each other in the presence of guards or other ...
May 9, 2013

C/J
The role of the defense attorney is to: A. decide the innocence of the accused. B. get his or her client off by whatever means. C. give the client every resource available to defend himself or herself within the limits of ethics and law. D. act as a legal technician to get his...
May 8, 2013

life orientation
5 ways in which the human or environmental problem impact on the community on Hiv&aids
May 8, 2013

help please
Although its meaning may vary from one culture to the next, __________ appears to be an almost universal taboo. A. murder B. rape C. theft D. incest D am i correct?
May 4, 2013

Physics 1
A steel wire in a piano has a length of 0.5000 m and a mass of 3.800 10-3 kg. To what tension must this wire be stretched in order that the fundamental vibration correspond to middle C (fC = 261.6 Hz on the chromatic musical scale)?
May 3, 2013

calculus
Find the derivative y = e^(-5x) + cos^3 x F(x)= (x^2 -x+1)^3
April 29, 2013

math
20
April 27, 2013

Chemistry
A sample of argon gas at STP occupies 56.2 liters. Find the number of moles of argon and the mass in the sample
April 27, 2013

Math
How do you find the equation of a line with a slope of 2 and containing the points 1,5
April 25, 2013

math
An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible formula for f(x).
April 23, 2013

landmark project
thank you but can you help me think of 3 questions for palace of fine arts
April 23, 2013

landmark project
I am not impatient
April 23, 2013

landmark project
please
April 23, 2013

landmark project
i really need help
April 23, 2013

landmark project
did any workers die while building the palace of fine arts
April 23, 2013

landmark project
did any workers die while building the palace of fine
April 23, 2013

math
An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible formula for f(x).
April 23, 2013

Math
The invested in a bank savings accouint is coumpounded continousl, with an annual interest rate of 3%. If a deposit of $2000 is made, then determine the balance after 2 years
April 22, 2013

physics
Two speakers are wired to emit identical sounds in unison. The wavelength in air of the sounds is 6 m. Do the sounds interfere constructively or destructively at a point 10 m from both speakers? 1. Destructively 2. Neither 3. Constructively
April 21, 2013

General Chemistry
"How would you prepare 150. mL of 0.1M sodium hydroxide given a stock solution of 3.0M NaOH?" I made calculations and figured the process would be to dilute 5 mL of the 3.0M NaOH to 150. mL. Is this correct? For the ideal 150. mL of 0.1M NaOH, I calculated there to ...
April 21, 2013

math
Take an 17 by 11-inch piece of paper and cut out four equal squares from the corners. Fold up the sides to create an open box. Find the dimensions of the box that has maximum volume. (Enter your answers as a comma-separated list. Round your answer to three decimal places.)
April 21, 2013

Calculus
A University of Rochester student decided to depart from Earth after his graduation to find work on Mars. Before building a shuttle, he conducted careful calculations. A model for the velocity of the shuttle, from liftoff at t = 0 s until the solid rocket boosters were ...
April 21, 2013

Physics
A convex lens of focal length 2.5 cm is placed 4 cm from a small object of height 4 cm. Use a ruler and construct the image. Is the image real or virtual, upright or inverted? What is the image distance? What is the height of the image? What is the magnification?
April 21, 2013

landmarks
none of those tell me who named palace of fine arts
April 20, 2013

landmarks
ther are so many websites , i do not know which website do you want me to read about
April 20, 2013

landmarks
i dont get it
April 20, 2013

landmarks
how did Palace Of Fine Arts got its name
April 20, 2013

Find the avg rate
Find the average rate of change f(x)=x^3-3x+9 (a) from -4 to -3 (b) from -2 to 5 (c) from 5 to 9
April 19, 2013

Algebra
For the given equation, list the intercepts and test for symmetry. 2+y-121=0 Show tests algebraically
April 19, 2013

math
he should be puling with 66 pounds of force
April 18, 2013

Please Help! Rate of change...
Taxes: Along with incomes, peoples charitable contributions have steadily increased over the past few years. The table shows the average deduction for charitable contributions reported on individual income tax returns for the period 2007 to 2012. Find the average rate of ...
April 18, 2013

Math
Mack needs to buy fencing to surround his circular garden. If his garden is 30 feet across and fencing cost $4.50 per foot, how much will it cost to fence in Mark's garden? If the radius if of a circle is 4 feet, what is its circumference ? Ben ran 10 times around a ...
April 17, 2013

Find the rate of change
Taxes: Along with incomes, peoples charitable contributions have steadily increased over the past few years. The table shows the average deduction for charitable contributions reported on individual income tax returns for the period 2007 to 2012. Find the average rate of ...
April 17, 2013

Math
A meteoroid changed velocity from 1.0 km/s to 1.8 km/s in 0.03 seconds. What is the acceleration of the meteoroid?
April 16, 2013

Science
In 0.5 seconds, a projectile goes from 0 to 300m/s. what is the acceleration of the projectile?
April 16, 2013

Algebra 1
Solve for y=x-5
April 15, 2013

math
Let 2^a = 5 and 2^b = 7. Using exponent rules, solve the equation in terms of a and b. 0.4^x = 343
April 14, 2013

Math
Thanks!
April 14, 2013

Math
What is 8/9 as a percent, as a decimal, and a decimal rounded to two places?
April 14, 2013

Physics
no its still just wrong
April 14, 2013

Physics
That is wrong
April 14, 2013

Physics
A rotating uniform-density disk of radius 0.6 m is mounted in the vertical plane. The axle is held up by supports that are not shown, and the disk is free to rotate on the nearly frictionless axle. The disk has mass 5.8 kg. A lump of clay with mass 0.5 kg falls and sticks to ...
April 14, 2013

Physics
11-098-satellite_and_junk.jpg A spherical satellite of radius 4.6 m and mass M = 195 kg is originally moving with velocity vsatellite,i = < 3000, 0, 0 > m/s, and is originally rotating with an angular speed ?1 = 2 radians/second, in the direction shown in the diagram. A ...
April 14, 2013

Physics
A device consists of eight balls each of mass 0.4 kg attached to the ends of low-mass spokes of length 1.8 m, so the radius of rotation of the balls is 0.9 m. The device is mounted in the vertical plane. The axle is held up by supports that are not shown, and the wheel is ...
April 14, 2013

CHEM QUICK HELP
Which of the following are correct statements? (Could be as many as 4) 1. Standard pressure is 101.3 atmospheres 2. One mole of gas contains 22.4 representative particles 3. One mole of gas always occupies 22.4 liters regardless of other conditions 4. Solids can always be ...
April 11, 2013

math
Thank you!
April 10, 2013

math
Dad baked a batch of cookies. My brother ate half my mom ate a fourth of the batch. Dad ate 3 and I ate the last two. How many cookie did dad bake? PLEASE help me figure this problem out?
April 10, 2013

math
A population of animals oscillates between a low of 1098 on January 1 (t = 0) and a high of 2344 on July 1 (t = 6). (a) Find a formula for the population, P, in terms of the time, t, in months.
April 9, 2013

Physics
A car has a unibody-type frame and is supported by four suspension springs, each with a force constant of 36100 N/m. The combined mass of the car’s frame and everything inside it (the engine, the seats, the passengers, etc.) is 1270 kg. Because of worn-out shockabsorbers...
April 7, 2013

Physics
A particle hangs from a spring and oscillates with a period of 0.2 s.If the mass-spring system remained at rest, by how much would the mass stretch it from its normal equilibrium position? The acceleration of gravity is 9.8 m/s^2
April 7, 2013

Physics
A mass of 0.22 kg is attached to a spring and is set into vibration with a period of 0.10 s. What is the spring constant of the spring? Answer in units of N/m
April 7, 2013

General Chemistry
What volume of 1.0 M HCl would react completely with 0.20 grams of NaC2H3O2*3H2O? It sounds like an equation I would set up as this and would use mole ratios to calculate the answer: HCl + NaC2H3O2*3H2O --> But I am confused as to what I would put as the products, let alone...
April 7, 2013

Chmeistry
Estimate the uncertainty in the speed of an oxygen molecule if its position is known to be +/- 3 nm. The mass of an oxygen molecule is 5.31 x 10^26 kg.
April 4, 2013

General Chemistry
Balance the following redox reaction in acidic and basic solutions: Fe(OH)2(s) + O2(g) --> Fe(OH)3(s) These are the steps my instructor gave us to balance redox reactions: 1. Divide into 1/2 rxns (reduction & oxidation) 2. Balance atoms other than H & O 3. Balance O with ...
April 3, 2013

Physics 1
A coin rests 12.0 cm from the center of a turntable. The coefficient of static friction between the coin and turntable surface is 0.350. The turntable starts from rest at t = 0 and rotates with a constant angular acceleration of 0.749 rad/s2. After what period of time will the...
April 1, 2013

language arts
it is a spring break pratice book
March 29, 2013

language arts
but i need help i am only in third grade
March 29, 2013

language arts
true or false. 1. it is easy to walk across something impassable. 2. ice sheets floating on water are called floes. 3. land that is barren has many plants and animals. 4. a crevasse is a deep crack.
March 29, 2013

english
Special education services for young children are with disabilities a. cannot be enforced through laws b. depend on parent efforts c. do not involve the head Start program d. are rooted in federal legislation My answer is d.
March 28, 2013

math
You are at the music store to buy some CDs. You have $45 to spend and the store sells CDs for 12.99 each. Write an inequality that represents the number, n, of CDs that you can buy without spending more money than you have. help greatly appreciated thk
March 27, 2013

geography
The OB river flows through which region a. Central Asia b. Siberia c. Moldova d. Ukraine a or b not sure I think B is more correct am i right?
March 26, 2013

Science
Calculate the quantity of energy required to change 3.00 mol of liquid water to steam at 100°C. The molar heat of vaporization of water is 40.6 kj/mol
March 25, 2013

Biology { PLEASE HELP :D }
From an ATP production viewpoint, use fact B to make a statement regarding the efficiency of fats vs. carbs. Fact b - Carbs bind and store water. The metabolism of water yields no ATP. Fat has no water bound to it.
March 25, 2013

organic chemistry
Did a grignard experiment where we were supposed to form triphenylmethanol but something went wrong. When we heated up the mixture with the petroleum ether, it didn't solidify, it turned dark and oily. What went wrong?
March 25, 2013

organic chem
I prepared triphenylmethanol by a grignard reaction. At the end you add petroleum ether to the mixture and heat it up. It stayed a liquid and got dark and oily but never solidified. What went wrong?
March 25, 2013

Stats
Is noise present in the differenced series (taking non-stationary data and making it stationary thru first difference of a time series)?
March 23, 2013

language arts
thank you
March 23, 2013

language arts
what is the past tense of go
March 23, 2013

language arts
i get it now
March 23, 2013

language arts
i do not get it
March 23, 2013

language arts
what is the exact verb of swam
March 23, 2013

Curriculum dev
Behavior objectives should be written about a behavior that a) is exhibited by most chlldren. B) can actually be seen. C) exhibits all five selves. D) can be evaluated using standardized test. I think a) is exhibited by most children. CAn someone give me some feedback
March 20, 2013

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