Friday

July 25, 2014

July 25, 2014

Total # Posts: 298

**Chemistry**

10. For the titration of 20.00 mL 0.1000 M lactic acid with 0.1000 M NaOH, calculate the pH: a. before any titrant is added b. 10.00 mL prior to the equivalent point c. at the equivalent point d. 10.00 mL after the equivalence point. Plot the points obtained on a graph of pH v...

**Chemistry**

A 5.00 mL aliquot of vinegar (acetic acid, FW = 63 g/mol) was diluted and titrated with 0.1104 M NaOH requiring 32.88 mL. If the vinegar has a density of 1.055 g/mL, calculate its acidity as % acetic acid

**physics**

an electron is accelerated from rest through a potential difference V. If the electron reaches a speed of 9.11*x10^6 m/s, what is the potential difference?

**psychology**

Much research is being conducted on repairing faulty sensory organs through devices such as personal guidance systems and eyeglasses, among others. Do you think that researchers should attempt to improve normal sensory capabilities beyond their “natural” range (for e...

**Math**

A basket of goods and services representative of the CPI cost $2750 when the CPI stood at 118.3. What did the basket of goods cost 10 years earlier, when the CPI was at 93.1? What was the overall percent inflation experienced by consumers for the entire 10-year period?

**math**

1)5 [19+ (5^2-16) ^2] ^2 2)(7m^3-m-6m^2+10)-(5m^3-9+3m-2m^2) 3) 3 (a-2)(4a+1)-5(2a+3)(a-7) 4)6a^2b/-2ab^2 5) 120(1+i) ^2+180(1+i) ^3 /360(1+i)

**Physics**

A space probe has two engines. Each generates the same amount of force when fired, and the directions of these forces can be independently adjusted. When the engines are fired simultaneously and each applies its force in the same direction, the probe, starting from rest, takes...

**math**

what is th value of 4!

**Physics Help..**

Thank you sooo much!

**Physics Help..**

The cable of an elevator of mass M = 1900 kg snaps when the elevator is at rest at one of the floors of a skyscraper. At this point the elevator is a distance d = 10.6 m above a cushioning spring whose spring constant is k = 8500 N/m. A safety device clamps the elevator agains...

**math**

the slope of a mountain if 10, 560 feet lenghth and 5,280 feet widthe

**Logic **

Having trouble with these two 1. 1 ~J 2 (B ⊃ M) ⊃ (~J ⊃ B) 3 ~J ⊃ (B ⊃ M) / B 2. 1 ~L 2 V v (A v L) 3 (V v A) ⊃ ~V / A

**physics**

A ball is thrown 107 m upward and then falls back to earth. Neglecting air resistance, how long will it be in the air? The acceleration of gravity is 9.8 m/s2 . Answer in units of s

**algebra**

can i get help with this question please solve by completeing the square 1/2x^2 -7x=16

**algebra**

can someone please help me solve this solve by completeting the square 1/2 ¡¼X ¡½^2 -7x=16

**philosophy logic - math**

Natural Deduction Proof 1. 1 ~Y ⇒ ~L 2 W v ~Y 3 W ⇒ ~B / ~B v ~L 2. 1 ~U • (G = ~T) 2 (~U v D) ⇒ (W • ~R) / W • ~U 3. 1 (M ⇒ P) ⇒ ~P 2 H ⇒ P 3 M ⇒ H / ~H 4. 1 ~Z 2 S 3 Zv(S ⇒ H) / H

**philosophy logic**

Natural Deduction Proof Help? Having trouble with these two 1. 1 ~Y ⊃ ~L 2 W v ~Y 3 W ⊃ ~B / ~B v ~L 2. 1 ~U • (G = ~T) 2 (~U v D) ⊃ (W • ~R) / W • ~U

**polynomials help me please**

Im sorry here is the problem rewritten X^3 -2x^3 + 3x-1 : X^2-x+4 I have to get the sum diff and product and it kicking my tail i think i keep doing it wrong can someone please help me

**polynomials**

can someone please help me with this problem I have to get the sum diff and product I keep trying to work it out but i really think im blowing it. x^3- ¡¼2x¡½^2 + 3x-1 ¡Ã x^2- x+4

**polynomials**

Can someone check my answer please i dont know if I am doing this right x^ (2):x= sum (x^2 )+ (x)=x^2+x diff (x^2 )-(x)= (x^2-x) Product (¡¼x)¡½^2 (x)=x^2^x

**polynomials**

can someone help me with this crazy problem please I have to do the sum diff and product for class x^3- ¡¼2x¡½^2 + 3x-1 ¡Ã x^2- x+4

**algebra**

how do i solve this v= 4/3 πx^3

**algebra**

can someone help me with this please 2/3 ãx =8

**algebra**

how do i solve ã(x+4) =y+2 solve for x.

**math**

The average temperature for the month of April is 65 degrees. The temperatures ranged from 12 degrees warmer or colder. Write and solve an absolute value equation to represent this information. Write you answer in a sentence format to explain your answer.

**multiplying**

15xy (x=y)

**Algebra**

A goldsmith has two gold alloys. The first alloy is 20% gold; the second alloy is 60% gold. How many grams of each should be mixed to produce 40 grams of an alloy that is 30% gold? amount of 20% gold_____g Amount of 60% gold_____g

**marketing**

The marketing manager at Massimino & McCarthy, a chain of retail stores that sells men's clothing, is reviewing marketing research data to try to determine if changes in marketing strategy are needed. Which of the following sources of data would be a secondary data source?

**Phoenix**

Projectile motions problems are some of the most important problems you will encounter in this course. Through this discussion, we will solve a projectile motion problem step by step Assume a projectile is launched from ground height over a flat plane, at an angle of 50 degree...

**Math**

An individual has 25000 to invest. As their financial consultant, you recommend investing in Treasury Bills earning 7%, Corporate Bonds earning 9% and Junk Bonds earning 11%. Find all the investment alternatives that will earn $2000 per year.

**math-high school**

If the probability of an event happening is 2/5, then the probability of the event not happening is 3/5? This is False. The answer is 1/3. Explain why the answer is 1/3

**chemistry**

which metal react most vigorously? metals aluminum, copper, magnesium, lead, tin, zinc 1. which metal will react most quickly? 2. which will take the longest time to react? 3. which will react most vigorously and least vigorously? 4. list metals from order of least to most vig...

**6th Grade Math**

thanks.

**6th Grade Math**

Need help to explain to my daughter: A horsepower is the power needed to lift 33,000 pounds 1 foot in 1 minute. It is equivalent to 746 watts. Express 525 watts as a portion of a horsepower both as a fraction and a decimal rounded to the nearest thousandth. Thanks for anyone&#...

**math**

1 can OJ is 15% 1 can is 10% how many liters of each should be mixed together to get 5 liters at 13%

**Physics**

Posted by Dan on Thursday, February 21, 2013 at 11:17pm. Plane flying southwest at 155mi/hr. their is a wind from the west at 45.0mi/hr. what's the planes new velocity

**Net ionic reaction**

What is the net ionic equation of MgS04 with Sr(N03)2? I get most of the equation right but i think im missing something...

**ETSU**

How much work is done when a force of 800.0 N is exerted while pushing a crate across a level floor for a distance of 1.5 m

**math**

Two similar rectangular gardens have a ratio of 2:3. If one side of the larger garden is 18 feet, how long is the corresponding side of the smaller garden?

**math**

Two similar rectangular gardens have a ratio of 2:3. If one side of the larger garden is 18 feet, how long is the corresponding side of the smaller garden?

**math**

Gemma has to complete her chores for the week. She must finish 10 hours of chores to receive her allowance. She can work on landscaping for 2 to 8 hours. She can also do laundry for 4 to 6 hours. Determine the graph that correctly represents this system of inequalities. PLEASE...

**business statistics**

a state of indiana lotto ticket pays winners $0, $5, $25, and $200 with probabilities of 0.94, 0.03, 0.02, and 0.01 respectivley. the expected value of this ticket is

**physics**

A projectile is shot straight up from the earth's surface at a speed of 1.50×104 .

**Physics**

A man lies on a plank of negligible mass supported by two scales 2.50 m apart. His head rests on the left scale which is also the axis of rotation. If the left scale reads 290 N and the right scale reads 122 N calculate his mass.

**business**

Final Global Business Plan Paper and Presentation for paraguau

**math**

7/12, 14/30 approximation which is greater

**geometry **

I have a 20 qyestuon assigment that its due tomorrow,but i need help on this question. Determine if the conjecture is true or false.If its false give a conterexample. Given: two angles are supplementary. Conjecture: one angle is obtuse and one is acute. please help me!!!

**geometry**

I really need help on this question: Determine whether each conjecture is true or false.Give a counterexample for any false conjecture. Given:Wx=XY Conjecture:W,X,Y are collinear. PlEASE HELP!!!

**geometry **

I'm stuck on this question please help. "GK bisects angle FGH". If angle FGK=8v-2 and angle KGH=3v+3,find angle FGH. PLEASE HELP ME

**geometry**

Thanks for your help!!!

**geometry**

I was assiged a 44 question assigment and I really need some help.I'm stuck on this question: "Find the coordinates of S for RS if Q is the midpoint and R is an endpoint. Q(-6,-5),R(-4,4)

**geometry**

I was assiged a 51 question assigment today and its due tomorrow.I'm having a hard time with the following question: "If angle BFA=3r+12 and angle DFE=-8r+210,find angle AFE". PLEASE HELP!!!!

**geometry**

I'm stuck on this question please help. "Lines p and q intersect to form adjacent angles 1 and 2.If angle 1=3x+18 and angle 2=-8y-70,find the values of x and y so that p is perpendicular to q.

**geometry**

Thanks!!!

**geometry**

I need help with this question. "The measure of the supplement of an angle is 60 less than three times the measure of the complement of the angle.find the measure of the angle". Please help!!!!

**geometry**

Thank you so much!!!!!

**geometry **

I"m stuck on this question "Rays PQ and QR ae perpendicular.Point S lies in the interior of angle PQR.If angle PQS!=4+7a and angle SQR=9+4a,find angle PQS and angle SQR. PLEASE HELP!!!!

**geometry**

Thanks!!!!

**geometry**

I'm having a hard time with this question: "AB has endpoints A(n,4n) and B(3n,6n). Which of the following is true? A. AB=4n B. The midpoint of AB is (2n,2n). C. AB=n√8 D. The midpoint of AB is (4n,10n)". PLEASE HELP!!!!!

**geometry**

I was assiged to a 20question assigment and Im having troubles with the following question: "Find the coordinates of the midpoint of a segment having the endpoints C(4,1) and D(-3,7). Then find the distance between the endpoints PLEASE HELP!!! Its due on monday!!!

**math**

The average middle-distance runner at a local high school runs the mile in 4.5 minutes, with a standard deviation of 0.3 minute. The percentage of a runners that will run the mile in less than 4 minutes is %.

**chem**

what volume of 1M NaOH is needed for the reaction with 1L of 1M HCl?

**math**

Whole numbers can be represented by rectangular arrays of tile. What kind of numbers have more than one rectangular array?

**math**

Multiply using Area Models – Draw the model a. 1/3 x 4/5 b. 3/4 x 1/5

**math**

O ok thanks i reaally appreciate it

**math**

The queen asked her cook how many guests had attended a recent banquet. “I do not know, my lady” he said, “but every two guests shared a plate of fruit between them, every three used a bowl of broth among them, and every four shared a platter of beef. I used 65 ...

**math**

as in where did you get the 13g/12=65

**math**

im sorry i really dont get how you got that

**math**

The queen asked her cook how many guests had attended a recent banquet. “I do not know, my lady” he said, “but every two guests shared a plate of fruit between them, every three used a bowl of broth among them, and every four shared a platter of beef. I used 65 ...

**Business Analysis**

Your answer for number 2 is incorrect I got 56.25% it's 45,000=40,000(r)2 45,000=80,000(r) 45,000/80,000 r=.5625 or 56.25%. number three is also incorrect. Answer A is correct, but answer B is not. You have to examine the key word ordinary value, which is number of days di...

**Math**

If the simple interest on $1000 for 2 years is $300, then what is the rate?

**Math**

The volume of a rectangular aquarium is 900 gallons. the bottom is 4 feet by 6 feet. find the height of the tank

**Math**

The area of a rectangular garden is 55 square meters. The length is 7 meters. Find the width?

**math**

In a bird sanctuary 41 different special of birds are being studied. Three large bird feeders are constructed, each providing a different type of bird feed. One feeder has sunflower seeds. A second feeder has a mixture of seeds, and the third feeder has small pieces of fruit. ...

**math**

The Pythagorean Theorem gives the relationship between the sides of a right triangle. The following identities show the relationships between the trigonometric functions of a particular angle. sin2 θ + cos2 θ = 1 tan2 θ + 1 = sec2 θ 1 + cot2 θ = csc2 &...

**math**

Solve the following polynomial inequalities. 4x - 5 ≤ 2(x - 7)

**math**

Solve the following polynomial inequalities. A) x^3 - 5x^2 + 2x ≥ -8 B)2(x3 - 2x2 + 3) < x(x - 1)(x + 1)

**math**

When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p.

**math**

Solve the following polynomial inequalities. a) 4x - 5 ≤ 2(x - 7)

**Chemistry**

What volume of 0.716M KBr solution is needed to provide 10.5g of kBr?

**chemistry(PLease Help)**

An aqueous solution contains 0.223 M carbonic acid and 0.112 M hydrobromic acid. Calculate the carbonate ion concentration in this solution. [CO32-] = mol/L. Can you please help me how to solve this problem?

**Statistics**

According to the Pew Internet &American Life Project. 75% of American adults use the internet. The Pew project authors also peported on the percentage of Americans who use the internet by age group. The data in the in the agefile group was consistent with their findings. these...

**math**

Let f(x) = ax^3 + bx^2 + 3x – 4. If f(x) is divided by (x – 2), the remainder is 2. When it is divided by (x – 1), the remainder is -2. Find a and b.

**math**

When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p.

**math**

Let f(x) = ax^3 + bx^2 + 3x – 4. If f(x) is divided by (x – 2), the remainder is 2. When it is divided by (x – 1), the remainder is -2. Find a and b.

**math**

Let f(x) = ax^3 + bx^2 + 3x – 4. If f(x) is divided by (x – 2), the remainder is 2. When it is divided by (x – 1), the remainder is -2. Find a and b.

**math**

When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p.

**math**

When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p. (2 marks)

**math**

If (x – 3) divides evenly into x^3 – x^2 – kx + k, find k. (2 marks)

**math**

Factor each of the following trinomials: (14 marks) A)15s2 + 26s + 8 B) x4 – 5x2 – 36 (hint: let a = x2) C) t2 + 4t – 2 D) 2w2 – w – 4

**Economics**

I have a few questions, for my test coming up. Which of the following is most necessary for specialization among producers to take place? Free trade Monetary policy Competition Scarcity Which of the following best states the purpose of an import quota? To reduce competition fr...

**Electronic Devices**

An n-channelJFET is biased such that VGS= -2V using self bias. The gate resistor is connected to ground

**Urban Anthropology**

Can anyone tell me what an architectural bidirectional relationship is with regards to urban anthropology?

**chem 2**

if 10.0g of NaF and 20.0 g of HF are dissolved in water to make one liter of solution, what will the pH be? For HF, Ka=6.8x10-4.

**math**

Find the discriminant. Tell which conic section each graph will be. 4x^2 + 9y^2 +7x-2y-100=0 4x^2+14xy+7x-2y-100=0

**Chemistry**

I get answer 0.172. Is that correct?

**Pre-Cal**

This exercise is based on the following table, which lists interest rates on long-term investments (based on 10-year government bonds) in several countries in 2008. How long, to the nearest year, will it take an investment in Germany(4.3%) to triple its value if the interest i...

**Pre-Cal**

This exercise is based on the following table, which lists interest rates on long-term investments (based on 10-year government bonds) in several countries in 2008. Assuming that you invest $12,000 in the Japan(1.5%), how long (to the nearest year) must you wait before your in...

**chemistry**

I get the answer 5 times. Is that correct?

**Algebra**

The Oliver Company plans to market a new product. Based on its market studies, Oliver estimates that it can sell up to 4,500 units in 2005. The selling price will be $2 per unit. Variable costs are estimated to be 20% of total revenue. Fixed costs are estimated to be $6,400 fo...