Saturday
August 23, 2014

Posts by Rick


Total # Posts: 296

Calculus
use the simpson's rule with n=10 to estimate arc length of y=x^(-1/3), for 1<=x<6
July 31, 2014

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 ...
June 22, 2014

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
June 22, 2014

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?
May 13, 2014

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 ...
May 13, 2014

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?
May 3, 2014

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)
May 3, 2014

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...
February 12, 2014

math
what is th value of 4!
January 9, 2014

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 ...
December 30, 2013

math
the slope of a mountain if 10, 560 feet lenghth and 5,280 feet widthe
November 8, 2013

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
October 12, 2013

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
October 5, 2013

algebra
can i get help with this question please solve by completeing the square 1/2x^2 -7x=16
October 3, 2013

algebra
can someone please help me solve this solve by completeting the square 1/2 ¡¼X ¡½^2 -7x=16
October 2, 2013

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
September 29, 2013

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
September 28, 2013

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
September 21, 2013

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
September 21, 2013

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
September 20, 2013

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
September 20, 2013

algebra
how do i solve this v= 4/3 πx^3
September 16, 2013

algebra
can someone help me with this please 2/3 ãx =8
September 15, 2013

algebra
how do i solve ã(x+4) =y+2 solve for x.
September 15, 2013

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.
July 20, 2013

multiplying
15xy (x=y)
July 13, 2013

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
June 1, 2013

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?
May 30, 2013

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 ...
May 10, 2013

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.
May 1, 2013

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
April 25, 2013

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 ...
April 18, 2013

6th Grade Math
thanks.
March 26, 2013

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&#...
March 26, 2013

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%
March 4, 2013

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
February 22, 2013

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...
February 11, 2013

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
February 9, 2013

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?
January 30, 2013

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?
January 30, 2013

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...
December 19, 2012

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
December 10, 2012

physics
A projectile is shot straight up from the earth's surface at a speed of 1.50×104 .
November 30, 2012

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.
November 27, 2012

business
Final Global Business Plan Paper and Presentation for paraguau
November 12, 2012

math
7/12, 14/30 approximation which is greater
November 1, 2012

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!!!
September 18, 2012

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!!!
September 12, 2012

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
August 28, 2012

geometry
Thanks for your help!!!
August 28, 2012

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)
August 28, 2012

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!!!!
August 27, 2012

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.
August 26, 2012

geometry
Thanks!!!
August 25, 2012

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!!!!
August 25, 2012

geometry
Thank you so much!!!!!
August 25, 2012

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!!!!
August 25, 2012

geometry
Thanks!!!!
August 25, 2012

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!!!!!
August 25, 2012

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!!!
August 24, 2012

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 %.
July 31, 2012

chem
what volume of 1M NaOH is needed for the reaction with 1L of 1M HCl?
July 30, 2012

math
Whole numbers can be represented by rectangular arrays of tile. What kind of numbers have more than one rectangular array?
July 29, 2012

math
Multiply using Area Models – Draw the model a. 1/3 x 4/5 b. 3/4 x 1/5
July 22, 2012

math
O ok thanks i reaally appreciate it
July 15, 2012

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 ...
July 15, 2012

math
as in where did you get the 13g/12=65
July 14, 2012

math
im sorry i really dont get how you got that
July 14, 2012

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 ...
July 14, 2012

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 ...
June 27, 2012

Math
If the simple interest on $1000 for 2 years is $300, then what is the rate?
June 18, 2012

Math
The volume of a rectangular aquarium is 900 gallons. the bottom is 4 feet by 6 feet. find the height of the tank
June 18, 2012

Math
The area of a rectangular garden is 55 square meters. The length is 7 meters. Find the width?
June 18, 2012

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. ...
June 10, 2012

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...
May 12, 2012

math
Solve the following polynomial inequalities. 4x - 5 ≤ 2(x - 7)
May 11, 2012

math
Solve the following polynomial inequalities. A) x^3 - 5x^2 + 2x ≥ -8 B)2(x3 - 2x2 + 3) < x(x - 1)(x + 1)
May 10, 2012

math
When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p.
May 9, 2012

math
Solve the following polynomial inequalities. a) 4x - 5 ≤ 2(x - 7)
May 9, 2012

Chemistry
What volume of 0.716M KBr solution is needed to provide 10.5g of kBr?
May 5, 2012

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?
April 25, 2012

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...
April 12, 2012

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.
April 8, 2012

math
When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p.
March 23, 2012

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.
March 23, 2012

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.
March 21, 2012

math
When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p.
March 21, 2012

math
When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p. (2 marks)
March 20, 2012

math
If (x – 3) divides evenly into x^3 – x^2 – kx + k, find k. (2 marks)
March 20, 2012

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
March 20, 2012

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 ...
March 13, 2012

Electronic Devices
An n-channelJFET is biased such that VGS= -2V using self bias. The gate resistor is connected to ground
March 9, 2012

Urban Anthropology
Can anyone tell me what an architectural bidirectional relationship is with regards to urban anthropology?
March 4, 2012

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.
March 3, 2012

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
March 1, 2012

Chemistry
I get answer 0.172. Is that correct?
February 29, 2012

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 ...
February 29, 2012

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 ...
February 29, 2012

chemistry
I get the answer 5 times. Is that correct?
February 27, 2012

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 ...
February 19, 2012

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