Sunday
August 28, 2016

Posts by sara

Total # Posts: 4,327

chemistry
A solution is made by mixing 25 mL of .35 M LiOH with 15.5 mL of .2225 M NH3. Kb=1.8x10^-5 for NH3 Calculate the pH for the solution.
August 25, 2016

perfect number
I need please!!!!
August 16, 2016

perfect number
Yes i need soon for my activity
August 16, 2016

perfect number
I need two perfect numbers. For my activity,I should submit it tomorrow please help me. I need now. Please
August 16, 2016

Maths
An industrial fertilizer costing $370 per tonne to produce is sold retail 61 cents per kilogram.If there is a wastage of 2.5%,find the profit as a percentage of the cost?
June 29, 2016

Abnormal Psychology
GAD
June 27, 2016

Math
Sara was mixing punch for a party from a recipe that calls for 3 parts ginger ale mixed with 2 parts pineapple juice. She graphed the people served compared to the total mixture. Use the point shown on her graph to compute the ginger ale need to serve 20 people.
June 24, 2016

math
if you make guesses for four multiple-choice test questions (each with five possible answers), what is the probability of getting at least one correct?
June 23, 2016

Chemistry
Prepare M/20 oxalic acid solution.Using this solution, find molarity, strength, and percentage purity of the sodium hydroxide solution.
June 13, 2016

English
Option 3 is the Best Answer according to me. Trust me, I am a School Topper in Emirates English Speaking School, Dubai, UAE. Even though others are grammatical enough, most teachers have Option 3 in mind.
June 13, 2016

english
thank you!
May 29, 2016

english
What parts of grammar are the words? Yesterday is history. Tomorrow is a mystery. Today is a gift, which is why we call it the present. Yesterday? Tomorrow? gift? call? it? present? My brother was discharged and will follow up next week. My? will follow up?
May 29, 2016

English
I agree on that one. C.
May 28, 2016

Math
Thanks!!! <3
May 22, 2016

Math
Form the perfect square trinomial in the process of completing the square. What is the value of c? x^2 + 3x + c = 7/4 + c c =
May 22, 2016

Math
Say that you (or your parents) are purchasing a used car for $22,350. The sales tax is 7.5%, the down payment is $1,200.00, and you have an average credit rating. If your first payment is $475.25, how much of the payment goes toward the principal? The average rating is 5.85. ...
May 21, 2016

ELA
Identify the type of clause that is underlined in the following sentence. In this game, whoever gets the fewest whoever gets the fewest points wins. whoever gets the fewest points is underlined
May 11, 2016

finance
Jiminy's Cricket Farm issued a 30-year, 7.2 percent semiannual bond 9 years ago. The bond currently sells for 85.5 percent of its face value. The book value of this debt issue is $107 million. In addition, the company has a second debt issue, a zero coupon bond with 12 ...
May 9, 2016

math
thank you so much!
May 9, 2016

math
I asked this yesterday and didn't get a response. I know it is difficult since you can't see the picture on my homework. Can you tell me if I started correctly and used the correct formula for surface area of a triangular prism? Is there a way to post a pic to help ...
May 9, 2016

geometry (please help)
IMG_7042.JPG I tried to take a pic of the image. Hope it shows because I really need help. Thank you
May 8, 2016

geometry (please help)
Is there a way to post a pic to help explain this? (I will try and explain the triangular prism. it has a 90 angle. the long end of the triangle is 13.5 in. One side is 10 in and the other side of the triangle is 9 in. the side coming down from the triangle making the prisms ...
May 8, 2016

math- geometry
no, the 1 m is not the area of the shaded portion. there is a dotted line across the shaded part and ending at the outer part of the glass. the dotted part is 1 m. that is why I felt if you added that part to the radius of the glass, it would give the radius of the circular ...
May 5, 2016

math- geometry
the shaded area(I mean portion, not the area as in the equation.) shows the distance of the shaded part=1m, . They put that there so you can add that piece onto 1/2m (radius of the inside circle) and together it gives you the radius of the full circle. How did you get the ...
May 5, 2016

math- geometry
I will try and explain this since I can't draw the picture that went with this question. A circular glass overlay was placed on the top of a circular table. Find the area of the shaded region, rounding to the nearest tenth. The shaded region is the part of the table ...
May 5, 2016

geography/social studies
thanks!
May 3, 2016

geography/social studies
one more question: what challenges does russia face as it finds its place in today's world?
May 3, 2016

geography/social studies
PLEASE HELP ME if you were an entrepreneur, which european country might be the best place to start your new business? explain your reasoning
May 3, 2016

social studies
Italy surrounds San marino. So C is the answer.
May 3, 2016

Science
Which of the following statements is true about Earth's magnetic poles? A.They are located at earths geographic poles B.They are the areas where Earths magnetic field is weakest. C. They are the areas where Earths magneic field is strongest. D. Earth has one dominant ...
April 27, 2016

Finance
If your bank pays an annual interest rate of 1.5% of balance exceeds $750 and it averages $815 but it falls below $750 for 4 months do you get the other 8 months interest or you get none because of the 4 months it fell below?
April 24, 2016

math
which pair of expressions are equivalent A 4(6X) and 10X B 4(6X) and 24X C 4X + 6X and 10 XX D 4X + 6X and 24X
April 23, 2016

chemistry
Aqueous sodium sulfate reacts with aqueous barium chloride to produce solid barium sulfate and aqueous sodium chloride. the solution contains 3.44g of barium chloride. you have a 0.282M solution of sodium sulfate. determine the volume of the sodium sulfate solution necessary ...
April 17, 2016

chemistry
what is the concentration of 24.5g of Ca(NO3)2 in 244mL of water
April 16, 2016

chemistry
how do i figure out the dilutions of 1.5L of a 15.0% (v/v) NaCl/water solution, what would the concentration of NaCl be if you added 3.0L of water
April 15, 2016

Translating a sentence into a one-step equation
Six more than the product of 8 and Gail's savings
April 15, 2016

U.S history
Compare and contrast the US involvement in the korean and the Vietnam war. Include two similarities and two differences. Can someone please please help me? I honestly remember nothing about these wars.
April 12, 2016

Writing
I need an amazing title that rhymes and includes the name Garza.... Same Thing with the name Coffee #i want these name to stand out as a title
April 11, 2016

Pre-Algebra
which of the following describes a situation in which a data set with a low mean absolute deviation is preferable? A. a car dealership sells cars at different prices B. a factory manufactures computers of different sizes and shapes. C. a food processing plant fills each can ...
April 11, 2016

Math
Your answer... It's like an interview
April 9, 2016

Math
When did you first start a saving plan? What is the purpose of the saving plan? How will having a saving plan benefit someone?
April 9, 2016

Physics
A 2.30 kg block is initially at rest on a horizontal surface. A horizontal force ModifyingAbove Upper F With right-arrow of magnitude 4.92 N and a vertical force ModifyingAbove Upper P With right-arrow are then applied to the block (see the figure). The coefficients of ...
April 7, 2016

math
Thank you for your help
April 6, 2016

math
what is the value of -3/4-(3/-8) (the 3/4 fraction only has the - on the 3, not the entire fraction) a -1 1/8 B -3/8 C3/8 D 1 1/8 What I did is first find a common denominator making the equation -6/8-(3/-8)= -9/16 this is not one of the choices Can you please help. Thank you
April 6, 2016

physics
When is the kinetic energy equal to zero?
April 5, 2016

chem.
The combustion of a polymer gives only carbon dioxide and water. Its average molar mass is 10500g/mol and its degree of polymerization is 2500. Determine the molar mass the formula and the name of the monomer. Draw the formula of the polymer what is its name. Thanks.
April 4, 2016

math
Thank you, I know I didn't know what symbol to use for absolute value, that is why I said I did the absolute value of..., but what are they asking for in the second part when asking What conclusion can you make from the mad value you found? I am not sure what they want. ...
April 2, 2016

math
can you please check my work. The time in minutes that it took five students to complete the math test was 45, 27, 30, 25, and 48. What is the mean absolute deviation of the times? I did 25+27+30+45+48= 175 then I divided it by the 5 students. 175/5= 35 so now I did the ...
April 2, 2016

Physics
A block is projected up a frictionless inclined plane with initial speed v0 = 2.19 m/s. The angle of incline is θ = 25.1°. (a) How far up the plane does it go? (b) How long does it take to get there? (c) What is its speed when it gets back to the bottom?
March 31, 2016

Physics
Three astronauts, propelled by jet backpacks, push and guide a 118 kg asteroid toward a processing dock, exerting the forces shown in the figure, with F1 = 32 N, F2 = 56 N, F3 = 38 N, θ1 = 30°, and θ3 = 60°. What is the (a) magnitude and (b) angle (measured ...
March 31, 2016

1st math
How far does the minute hand move in an hour?
March 28, 2016

math
sorry composition is actually supposed to be consumption
March 22, 2016

math
Which car is the cheapest to run?Explain why. Bill's car: average fuel composition 20 miles per gallon Sue's car: average fuel composition 30 miles per gallon Fred's car: average fuel composition 40 miles per gallon I think the answer is Fred because his car can ...
March 22, 2016

Math
At a hockey game, a vender sold a combined total of sodas and hot dogs. The number of sodas sold was three times the number of hot dogs sold. Find the number of sodas and the number of hot dogs sold.
March 19, 2016

Phys
Axwddxxhhgv
March 13, 2016

Phys
A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of the ring. The ring ...
March 13, 2016

Statistics
In a prior sample of U.S. adults, the Center for Disease Control (CDC), found that 10% of the people in this sample had pinworm but the margin of error for the population estimate was too large. They want an estimate that is in error by no more than 1.5 percentage points at ...
March 11, 2016

Statistics
Suppose you draw a card from a deck (with replacement) 10 times in a row. What is the probability that you get exactly 3 hearts? Round your answer to 3 decimal places.
March 11, 2016

english composition 11
all of the following are techniques of active reading except
March 10, 2016

English
B?
March 8, 2016

Business
I wonder if someone can help me on question please , Analyse the impact of relevant legislation/regulations on any two types of part time &full time employment contract ?
March 5, 2016

Statistics
TRUE or FALSE: The p-value of a hypothesis test is the probability that the null hypothesisis true given the sample statistic obtained.
March 5, 2016

science
A example of negative feedback a. elevated free t4 resulting in elevated trh b. elevated free T4 resulting in elevated tsh c low free T4 resulting in elevated tsh d. low free t4 resulting in low tsh i think its B. not sure.
March 4, 2016

physics
A 3.30-kg steel ball strikes a massive wall at 10.0 m/s at an angle of θ = 60.0° with the plane of the wall. It bounces off the wall with the same speed and angle (see the figure below). If the ball is in contact with the wall for 0.204 s, what is the average force ...
March 3, 2016

physics
A 0.224-kg volleyball approaches a player horizontally with a speed of 18.0 m/s. The player strikes the ball with her fist and causes the ball to move in the opposite direction with a speed of 22.0 m/s. (a) What impulse is delivered to the ball by the player? kg·m/s (b...
March 3, 2016

MATH
I NEED HELP WITH MULTIPLACATION
March 3, 2016

Chemistry
24.0 mL of 2.4 M silver nitrate is mixed with 32.0 mL of 2.0 M sodium chloride. ( I wrote the balanced equation as AgNo3+NaCl -> NaNo3 + AgCl ) A) Identify the precipitate formed by name and formula. - I wrote AgCl (silver chloride) B) Calculate the mass of precipitate ...
March 2, 2016

math
39?
March 1, 2016

physics
The figure here shows four penguins that are being playfully pulled along very slippery (frictionless) ice by a curator. The masses of three penguins and the tension in two of the cords are m1 = 12 kg, m3 = 16 kg, m4 = 21 kg, T2 = 101 N, and T4 = 202 N. Find the penguin mass ...
March 1, 2016

physics
A daredevil on a motorcycle leaves the end of a ramp with a speed of 35.5 m/s as in the figure below. If his speed is 34.0 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance. m
February 29, 2016

physics
A 61.0-kg runner has a speed of 3.20 m/s at one instant during a long-distance event. (a) What is the runner's kinetic energy at this instant? KEi = J (b) If he doubles his speed to reach the finish line, by what factor does his kinetic energy change? KEf KEi =
February 29, 2016

math
Ms. Hardin invested $70,000 in three stocks. The first year, stock A paid 6% dividends and increased 4% in value; stock B paid 8% dividends and increased 5% in value; stock C paid 9% dividends and increased 3% in value. If the total dividends were $5180 and the total increase ...
February 23, 2016

Economics - URGENT
Suppose we now care about the long run decisions of a firm that has a production function of the form q = 4L^1/2 + K Suppose w = 1 and r = 0.5 Assume that, at the beginning when w0 = 1 and r = 0.5, the firm chose to produce q0 = 20 units of output. Then, the wage increased to ...
February 23, 2016

Statistics
What is the difference between the population distribution, the distribution of the same, and the sampling distribution and what are the formulas to get the normal distribution of each?
February 16, 2016

Statistics
A sample of size 16 is taken from a normally distributed population with a mean of 12 and a standard deviation of 3. The probability that the sample mean is equal to 12 is a. 1 b. 0.5 c.-0.5 d.0 please explain
February 12, 2016

Science
Thank you for checking my work
February 11, 2016

Science
When hair is combed with a hard rubber comb, the hair becomes positively charged because the comb A. Transfers protons to the hair B. Remove electrons from the hair C. Transfers electrons to the hair D. Remove both times from the hair I could be removed electrons from hair . ...
February 11, 2016

Science
Thank you
February 11, 2016

Science
If you add a battery to a series circuit, what will happen to the current in the circuit? A. The current both stayed the same since there is the same resistance B. The comment will increase since there is less resistance C. The current will increase since there is more voltage...
February 11, 2016

calculus
25pi/3=1/2xsquare root of 100x^2 and plus 50 arcsin(x/10)
February 11, 2016

Science
Which of the following parts of a circuit is not actually necessary for the circuit to function? A. Wire B. Load C. Switch D. Energy source I put B. The load. I know you need wires to function since they connect the parts of the circuit. The switch turns the circuit on. I wasn...
February 10, 2016

ocupational therapy aide
exam for ocupational therapy aide
February 8, 2016

Statistics
We are managing a large soy bean farm. To estimate our revenues for the coming year, we need to estimate our crop yield. Soy bean yields are measured by pods/plant. We are planning for a yield of 40 pods/plant. a. We take a random sample of 64 soy bean plants and get a sample ...
February 8, 2016

Geography
Draw a table like the one below into your exercise book. With reference to the Simple model of an ecosystem (on page 2), suggest possible ways that each of the components of an ecosystem can influence each other. Climate Vegetation Fauna Landforms & Drainage Soils Climate ...
February 6, 2016

chem
use atomic theory to explain why chemical reactions obey the law of conservation of mass
February 4, 2016

Math
Joe spends $8 on lunch and $6.50 on dry cleaning. He also buys 2 shirts that each cost the same amount. Joe spends a total of $52. What is the cost of each shirt.
February 3, 2016

math
a 6-pack of under shirts costs $13.98. This is $3.96 less than the cost of buying 6 individual shirts. if each undershirt costs the same amount, how much does each undershirt cost when purchased individually?
February 3, 2016

Chemistry
In a sample of 100 liters of air a city's 2x10^-8 L of the pollutant SO2. How many ppm by volume ?
February 3, 2016

Economics
Luis’s utility function is u=x^.4y^.6 Suppose that Luis wants to get 60 utils, provide 4 bundles with which he can achieve that level of utility. Please explain
February 1, 2016

Economics
Can you check my answer Consider an individual with a utility function of the form: U(x,y)=xy , and where m=1, px=2, and py=3 , where m is the individual's income or wealth, pi is the price of good i. Calculate the individual's optimal consumption bundle, (x,y) = (...
February 1, 2016

math
plot sin(1*pi*1000t) +2 where v(t) =1 what does this plot for two periods look liek
February 1, 2016

Chemistry
In the preparation of one liter of 2.5 M HCl solution, what is the volume of HCl concentrated (37% w / w, d = 1.19 g / ml) to be used?
January 31, 2016

Civics
What are some common laws I really don't get this can someone explain it to me?
January 27, 2016

Math
A circle is divided into 8 equal parts. What is the total angle measure of 4 parts?
January 20, 2016

chemistry
The titration of 5.40 mL of a saturated solution of sodium oxalate, Na2C2O4, at 25∘C requires 29.4 mL of 2.200×10−2 M KMnO4 in acidic solution. What mass of Na2C2O4 in grams would be present in 1.00L of this saturated solution?
January 18, 2016

Electrical Engineering
Technically it could be either...
January 15, 2016

ECE
Assume that a device exists between two nodes A and B of a circuit and that the voltages of these two nodes A and B are equal to 2V and -3V respectively What is the voltage drop across the device? So I think I just go A-B , but it might also be B-A so either 5 or -5. im not ...
January 15, 2016

math [last]
m= 1/2 and y-intercept is 7. so x= 1/2x + 7
January 14, 2016

math [last]
Write the equation of the line with the given slope and y-intercept. slope = 1/2 y-intercept = 7 A)y = 7x + 1/2 <-- or is it C? B)y = 1/2x + 7 C)x = 7y + 1/2 D)x = 1/2y + 7
January 14, 2016

math
no wait is 2x+4.
January 14, 2016

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