Monday
May 4, 2015

Posts by IAN


Total # Posts: 212

math
43 circle
March 4, 2015

Math
The curves y=sinx and y=cosx intersects twice on the interval (0,2pi). Find the area of the region bounded by the two curves between the points of intersection.
March 1, 2015

[Calculus] U-substitution for Integrals
Nevermind. Found the answer again. Thanks again.
February 23, 2015

[Calculus] U-substitution for Integrals
Integral of cos(x)*a^sin(x) + C dx = Integral of cos(x)*sin(x)^a + C dx = Let a be a fixed positive number. I'm clueless is to how to solve for a...
February 23, 2015

[Calculus] U-substitution for Integrals
Nevermind, found the answer. It is (1/3)(u^5).
February 23, 2015

[Calculus] U-substitution for Integrals
Integrate from 1 to 5 of (3x-5)^5 dx = Integrate from a to b of f(u) du where (I have solved this part) u = 3x-5 du = 3 a = 0 b = 12 The original value of the integral is 165888 via calculator here's my last question, and it has to be in terms of u: f(u) = ? (Again, in ...
February 23, 2015

AP Chemistry
#1 is its own completely separate problem if it clears up any confusion. One of my friends says the Ho, being positive is endothermic, and she says it's more theoretically based too, and I don't think it uses any value of the heat formation table at all.
February 12, 2015

AP Chemistry
Thank you for #2! For #1, the same principles would apply right? Here are my reasons for the T/F. 1.) Decreasing the temperature at 500K would be beneficial for the reaction, and therefore would shift the reaction forward which would favor PCl3. Also, the equation is ...
February 12, 2015

AP Chemistry
2 Questions (Multi-choice and T/F, though not sure if they're right, and these 2 questions have no correspondence to each other) 1.) a.) Consider the following system at equilibrium where Kc = 1.20E-2 and H° = 87.9 kJ/mol at 500 K. PCl5 (g) <=> PCl3 (g) + Cl2 (g...
February 12, 2015

AP Chemistry
Consider the following reaction: 2NOBr(g) 2NO(g) + Br2(g) If 0.332 moles of NOBr, 0.377 moles of NO, and 0.375 moles of Br2 are at equilibrium in a 14.6 L container at 429 K, the value of the equilibrium constant, Kp, is ___. [NOBr] = .332mol/14.6 L = .0227 M [NO] = .377mol/14...
February 12, 2015

Grade 12 Physics
A rocket ship is moving away from the earth after having been fired from a launch pad in Florida. At what point above the earth's surface will the force of gravity be reduced to ½ of its original value? ------------------ Prior to this question I was given the ...
January 13, 2015

Calculus I
Semelparous organisms breed only once during their lifetime. Examples of this type of reproduction strategy can be found with Pacific salmon and bamboo. The per capita rate of increase, r, can be thought of as a measure of reproductive fitness. The greater r, the more ...
November 2, 2014

Math
A retail outlet purchased 300 printers at a list price of $100 less 7%, and 6%. The rate of markup on selling price on the printers was 40%. After selling 40% of the shipment, the rest of the printers were marked down to a reduced selling price. When there were only 40 ...
July 16, 2014

Physics I for College
thank you
June 23, 2014

Physics I for College
a rope that makes an angle of 30 degrees with the horizontal drags a crate along the floor. what must be the tension in the rope if a horizontal force of 40N is needed to drag the crate? please help me. i really didn't understand what my professor told me. he speak so fast...
June 23, 2014

health
hat is another name for bipolar disorder?
June 17, 2014

Biology
Hydrolysis uses a catabolic reaction. Explain what a catabolic reaction is and how it is useful in creating monomers from polymers.
May 12, 2014

Reading
What else can I add? I don't want to add too many "questions"
February 23, 2014

Reading
Okay, also for this passage "True, the genocide bloodlettings and other mass slaughters of the half century after Hitler- in Cambodia, in Biafra, in Bosnia, in Rwanda and elsewhere-did not approach the Holocaust in scale" I have down affected me a lot because knowing...
February 23, 2014

Reading
How does this passage affect you? “Lief was shown a pocketbook and lamp-shades made from human skin for Ilse Kich, wife of the commandant" So far I have: This left me in shock that someone would have the idea to skin off someone’s skin and make it into a gift ...
February 23, 2014

Math
83.95
February 6, 2014

physics
An ocean liner is traveling at 5m/s. A passenger on deck walks towards the rear of the ship at a rate of 4m/s. After walking 30 meters, he turns right and walks at a rate of 4m/s to the rail, which is 12 meters from his turning point. What is his velocity relative to the water...
November 13, 2013

chemistry
Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50-g sample is burned, and 1.70 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?
October 8, 2013

chemistry
Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 5.50-g sample is burned, and 1.70 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?
October 8, 2013

chattco
Dave's age in 4 years is 18. Write an equation that represents Dave's age in 4 years. Use the variable, d, to represent Dave's age
June 5, 2013

Math
A 3 in. by 5 in. photo is enlarged five times what is the dimensions of the larger photo
May 9, 2013

Algebra 2
Someone crapped in Howard's cornflakes
May 3, 2013

Maths :(
41 different balls are drawn from a bag containing balls numbered 1,2,…,300. The probability that the number of odd balls drawn is larger than the number of even balls can be expressed as ab where a and b are coprime positive integers. What is the value of a+b?
April 15, 2013

geometry
ABCD is a quadrilateral with ∠ADC=∠ACD, ∠ACB=∠ABC and CD=7. If triangles ADC and ABC have perimeter 51 and 59, respectively, what is the value of BC?
April 15, 2013

Maths
A bag contains 10 red marbles, 10 green marbles, 10 yellow marbles and 10 blue marbles. You reach into the bag and grab a marble, then reach into the bag and grab a second marble. The probability that the second marble is the same color as the first marble is ab, where a and b...
April 15, 2013

Maths
How many integer values x satisfy the inequality 2<3x−1/6<5?
April 15, 2013

MAths
Consider a digital clock. The first time after midnight when the three digits are all prime numbers is 2:22 am. What is the last time before 10:00 am, when the three digits on the clock are all prime numbers? Details and assumptions If you determine that the time is 4:23 am, ...
April 15, 2013

Maths
Find the number of positive integers <1000 that can be expressed as 2^k−2^m, where k and m are non-negative integers.
April 12, 2013

Maths
wasnt 5 :(
April 12, 2013

Maths
Two players each flip a fair coin. The probability that they get the same result can be expressed as ab where a and b are coprime positive integers. What is the value of a+b? Dont get the a+b :(
April 12, 2013

Maths
Let N=1!⋅2!⋅3!⋅4!…9!⋅10!. Let 2^k be the largest power of 2 that divides N. What is the value of k?
April 12, 2013

Physics :(( help please TT
You are a maker of hot air balloons and wish to construct a balloon that will lift you and a friend to places unknown. Your standard balloon design is a perfectly spherical, nylon fabric balloon with a small hole on the bottom for the burner that heats the air. Nylon starts to...
April 12, 2013

Physics
Consider a regular pyramid charged with constant volume charge density. The potential at point P, the top of the pyramid is 1V. What would be the potential at point P if we removed the top part, so the pyramid is instead truncated at a height h=0.6H? Hint: You don't need ...
April 12, 2013

Maths
In triangle ABC, D is the midpoint of AC and E is the midpoint of AB. BD and CE are perpendicular to each other and intersect at the point G. If AB=7 and AC=9, what is the value of BC^2?
April 12, 2013

Maths
Triangle ABC has lengths AB=14, AC=18 and also a given angle of ∠BAC=30∘. What is the area of triangle ABC?
April 12, 2013

Maths
7
April 10, 2013

Maths
If two six-sided dice are rolled, the probability that they both show the same number can be expressed as ab where a and b are coprime positive integers. What is the value of a+b?
April 10, 2013

Maths
Dont understand the a,b one TT
April 10, 2013

Maths
Two players each flip a fair coin. The probability that they get the same result can be expressed as ab where a and b are coprime positive integers. What is the value of a+b?
April 10, 2013

ELA
Which of the following is a simple sentence? A.Dawn mounted the stage slowly B.As she stepped in front of the podium,her legs were trembling. C.She was a talented speaker,and she greatly admired Dr.King. D.When she looked up again,her brother grinned and winked.
April 6, 2013

Maths
a and b are digits such that 120ab¯¯¯¯¯¯¯¯ is a multiple of 3, 5 and 7. What is the value of ab¯¯¯? Details and assumptions abc¯¯¯¯¯ means 100a+10b+1c, as opposed to a×b×c. As an ...
March 29, 2013

Maths
Let f be the function defined as f(x)=x^2 in the domain [−7,+7]. The range of f(x) is [a,b]. What is the value of a+b?
March 29, 2013

Maths
How many integers satisfy the inequality ∣10(x+1)/(x^2+2x+3)∣≥1?
March 28, 2013

Maths
Given tanθ=−4/3, where π/2<θ<π, what is the value of 1/(sinθ+cosθ)?
March 28, 2013

Maths
What is the sum of all integer values of n satisfying 1≤n≤100, such that n^2−1 is a product of exactly two distinct prime numbers?
March 28, 2013

Maths
What is the sum of all integer values of n satisfying 1≤n≤100, such that n2−1 is a product of exactly two distinct prime numbers?
March 28, 2013

Maths
Let f be the function defined as f(x)=x2 in the domain [−7,+7]. The range of f(x) is [a,b]. What is the value of a+b?
March 28, 2013

Maths
What is the sum of all integer values of n satisfying 1≤n≤100, such that n2−1 is a product of exactly two distinct prime numbers?
March 28, 2013

Algebra
ab = 75 Archaic solution: only possibilities for ab are 01 through 99. Eliminate all of those not divisible by 5, which leaves: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55. 60, 65, 70, 75, 80, 85, 90, and 95. Eliminate those not divisible by 3 (divisibility rule for 3) , which ...
March 26, 2013

Physics
Jake has a mass of 88.0 kg and is zooming along in a 110.0-kg bumper car at 9.4 m/s. He bumped Allen's car, which is sitting at rest. Allen has a mass of 88.0 kg. After the elastic collision, Jake continues ahead with a speed of 3.2 m/s. How fast is Allen's car bumped ...
March 18, 2013

Chemistry
Hg + 4H+NO-3 ---> Hg2+(NO3-)2 +2NO2 + 2H2O
March 7, 2013

Chemistry
Hg + 4H+NO-3 ---> Hg2+(NO3-)2 +2NO2 + 2H2O
March 7, 2013

geometry
Write an equation for each circle described. Center at origin,radius is 3. I'm stuck.aren't I suppose to be given an endpoint for me to be able to use the midpoint formula to find the center? I need help please...oh that's the only thing they give me.
February 19, 2013

Physics
The electric field intensity at a point 2m from the surface of a uniformly charged conducting sphere is 1920 N/C. At a point 4m from its center, the electric field intensity is 3000 N/C. a.) Determine the radius of the sphere. Determine the electric field intensity at a point...
February 4, 2013

geometry
Two observers are 200 feet apart,in line with a tree containing a birds nest.The anles of elevation to the birds nest are 30 degrees and 60 degrees.How far is each observer from the base of the tree? Please help me my assigment is due tommorrow!!!!!
January 24, 2013

geometry
I need help on a question that wants me to find x and y on a 45-45-90 triangle they only give me one side wich is three.I already solved for x which is three root two over two...Is that right? I don't know how to solve for y... Please someone help me....:(
January 22, 2013

geometry
I need help on a question that wants me to find x and y on a 45-45-90 triangle they only give me one side wich is three.I already solved for x which is three root two over two...Is that right? I don't know how to solve for y... Please someone help me....:(
January 20, 2013

English
^ hell yeah!
December 17, 2012

Chemistry
KF has the same type of crystal structure as NaCl. The unit cell of KF has an edge length of 5.39 Å. Find the density of KF in g/cm3
December 8, 2012

Chemistry
KF has the same type of crystal structure as NaCl. The unit cell of KF has an edge length of 5.39 Å. Find the density of KF in g/cm3
December 8, 2012

algebra
A roast chicken is done with the temperature of the thigh meat is between 165 and 175. Write a compound inequality to represent the temperature at which a roast chicken is done.
November 20, 2012

Calculus I
How did you get 2r for the height in the volume of water?
November 12, 2012

Calculus
The region between the graphs of x=y^2 and x=4y is rotated around the line y=4. The volume of the resulting solid is?
October 26, 2012

Physics
sorry I mean num 6,7
October 26, 2012

Physics
has anybody done num 10? it doesn't tell you where "that instant" is so what the hell?
October 26, 2012

Physics
i cant get the answer... thx for the help tho mike.
October 25, 2012

Physics
kaminsky hooray :p
October 25, 2012

trig
b=8944ft
October 15, 2012

Physics
The steel ball is suspended from the accelerating frame by the two cords A and B. The angles (they are on the inside) are both 60 degrees. Determine the acceleration of the frame which will cause the tension in A to be twice that in B. The acceleration is going to the right ...
October 4, 2012

Math
24:30 or 4:5 .... or 4/5 ... or 4 to five
October 4, 2012

physics
Use range equation: d = [v^2(sin2theta)]÷g 18 = [v^2(0.58778)]÷9.8 (18 x 9.8)÷0.58778 = v^2 v^2 = 216.745 v = 14.722 m/s Hope this helps :)
October 4, 2012

geometry
"Determine whether the conjecture is true or false.Give a counterexample for any false conjecture". Given: x = 5 Conjecture: m = 5 PLEASE HELP!!!
September 18, 2012

geometry
Determine whether each conjecture is true or false.Give a counter example for any false conjecture. Given:Angle 1 and angle 2 are not complementary.angle 2 and angle 3 are complementary. Conjecture:angle1=angle3
September 12, 2012

geometry
I need help on this question "Find the value of the variable and GH if H is between G and I". GI=8b+2,HI=3b-2,HI=16 Please helo me....
August 29, 2012

geometry
Thank you!!!
August 28, 2012

geometry
I need help on this homework question KL and KJ are opposites rays.Angle 1 is congruent to angle 2 and KM bisects angle NKL.If angle JKN=9x+5 and angle MKL=2x+3,what is angle MKN? Please help me....
August 28, 2012

Math
is that true? the answer, how old are you two?
July 11, 2012

calculus
Each of the sides of a square (S) with an area of 16 is bisected and a smaller square (S2) is constructed using the bisected parts as vertices. The same process is carried out on S2 to construct an even smaller square (S3). What's the area of S3? (Draw a diagram, please?)
June 5, 2012

math
Thank you very much!
May 13, 2012

math
2 planes parallel to the base of a pyramid cut the pyramid at 1/4 and 2/3 of the height as measured from the base up. If the volume of the pyramid is 100 cubic inches, what is the volume of the middle piece to the nearest tenth?
May 13, 2012

math
What is 3/8 divided by 9/10?
May 6, 2012

geometry
draw it, it always helps you will see that you need to use Tangent "Opposite over adjacent" tan(angle)=65/20
April 22, 2012

Math
3 hours
April 6, 2012

Math
If it takes 45 minutes to make 15 chairs how long would it take to make 100 chairs.
April 6, 2012

physics
A tow truck is connected to a 1500 kg car by a cable that makes a 27 degree angle to the horizontal. If the truck accelerates at 0.58 m/s^2, what is the magnitude of the cable tension? Neglect friction and the mass of the cable.
April 1, 2012

physics
A 140 g arrow is shot vertically from a bow whose effective spring constant is 500 N/m. If the bow is drawn 60 cm before shooting the arrow,to what height does the arrow rise?
April 1, 2012

chemistry
my K value was right. My mistake was when I plugged my values from my ICE table into the expression I used 0.25x^2/1.35-x instead of just x^2/1.35-x. Everything else was right.Thanks anyway
March 24, 2012

chemistry
At 298 K, 1.35 mol BrCl(g) is introduced into a 12.0 L vessel, and equilibrium is established in the reaction. BrCl(g)-->0.5Br2(g) + 0.5Cl2(g) Calculate the amount of BrCl(g) present when equilibrium is established.(Use delta G[Br2(g)]=3.11kJ/mol and delta G[BrCl(g)=-0.98Kj...
March 24, 2012

Physics
The problem is the notation. That is not kilo-newtons, that is k hat newtons. it should be 8/(17*1*3)
March 3, 2012

business
The answer to 18 is A - pie chart
February 10, 2012

geometry
A park at the end of a city block is a right triangle with legs 150 ft and 200 ft long. Make a scale drawing of the park using the following scale 1in:300ft.
February 1, 2012

chem
I have to find the effective pH range of a buffer. I read that this optimal buffering occurs when the pH is within 1 pH unit from the pK value for the buffering system. But can anyone explain why its is optimal within 1 pH unit? Thanks.
January 28, 2012

Science
What is a reference point in determining force, velocity,speed?
January 22, 2012

Science
If a car is going 65mph makes a 90 degree, what changes?
January 22, 2012

statistics
8. Assume that the MM207 Student Data Set is a random sample of all Kaplan students; estimate the proportion of all Kaplan students who are male using a 90% level of confidence.
January 18, 2012

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