Tuesday
September 2, 2014

Posts by Joe


Total # Posts: 2,049

precal
find the quotient z/w z=8(cospi/3+isinpi/3) w=4(cospi/18+isinpi/18)
May 20, 2011

precal
identify the trigonometric form of -6+6i
May 20, 2011

precal
find zw z=8(cospi/2+isinpi/2) w=4(cospi/4+isinpi/4)
May 20, 2011

precal
(root2-root2i)^6
May 20, 2011

precal
identify the standard form of the complex number: 10(cos259+isin259)
May 20, 2011

pre calculus
cube roots of 64i?
May 20, 2011

pre calc
find the fourth roots of 1-root3i
May 20, 2011

pre cal
convert the point to rectangular coordinates (7,1.75)
May 20, 2011

pre cal
convert the point to polar coordinates: (12,-12)
May 20, 2011

pre cal
[root2(cos2pi/11+isin2pi/11)]^4
May 20, 2011

pre cal
convert the point to rectangular coordinates (5,5pi/6)
May 20, 2011

pre calc
find the fifth roots of -32i
May 20, 2011

precalculus
covert the rectangular equation to polar form x2+(y+2)2=4
May 20, 2011

precalculus
fourth roots of 1-root3i
May 20, 2011

Math
the nature camp students are lunch at the lodge. They sat at an even number of tables. There were 5 students sitting at one table, and an equal number of students sitting at each of the other tables. How many students were sitting at each of the other tables?
May 18, 2011

the American journey
for #1 I think its C.and #2 A
May 18, 2011

the American journey
where did the traditions of the the cowhand begin? A.the confederate army? B.the vaqueros C.african american culture D.irish immigrants
May 18, 2011

the American journey
how about this one.... Before railroads, communities across the united states. A. fought the railroad's arrival. B. kept their own time. C. were organized into time zones. D. found it easier to transpot goods to market.
May 18, 2011

the American journey
1.why were immigrants and african americans hired to build the transcontinental railroad?A.they lived near the railroad?B.they were extremely skilled.C.they would work for very low wages.D.all of the above
May 18, 2011

Geometry
find the area of a parallelogram with diagonals of lengths 10 inches and 22 inches that intersect at a 65 degrees angle
May 17, 2011

geometry
that last answer posted is wrong
May 17, 2011

geometry
find the area of a parallelogram with diagonals of lengths 10 inches and 22 inches that intersect at a 65 degrees angle.
May 17, 2011

Math
If M=(1*2*3*4*......*1000) + 1, is M prime? I said no because 24001 can only be divided by 1 and itself, but I got a point off. Why is this?
May 10, 2011

Math - Equivalent Fractions
What is the equivalent fraction for 16/36
May 9, 2011

ENGLISH
Explain the initial steps of writing an essay. Identify how your audience, purpose, and content will influence your approach.
May 6, 2011

Business
I was asked to articulate what I feel are good traits of effective organization, as well as describe how I think culture affects the ability to handel change. I replied with a 350 word response, in my response i stated the "...culturally responsive; this leads way to the ...
May 6, 2011

english
hoe to diagram the white cat sleeps quietly
May 6, 2011

Algebra
Which digit will appear in the 534th place after the decimal point in the decimal representation of 5/13?
May 6, 2011

Math
2 apples weigh the same as a banana and a cherry.A banana weighs the same as nine cherries.How many cherries weigh the same as one apple
May 5, 2011

PreCalc - Vectors
An airplane is flying with an airspeed of 660 Kilometers per hour. The wind is blowing from 345 degrees at 35 km/h. What direction should the airplane take so that, with the wind, the plane will be flying in a direction of 72 degrees? I can compute airspeed and actual ...
May 3, 2011

Pre-Calculus
Two barges are pulling a ship into the harbor. Barge A is pulling with a force of 2700N at N43 deg E, and barge B is pulling at S 50 deg E. What force must barge B exert so that the ship is pulled directly East?
May 2, 2011

Algebra
What is the least integer value of x such that |2x + 7| is < or equal 16?
May 1, 2011

Algebra
Each year the value of a car decreases by 25% of its value the previous year. After 5 years, what is the value of a car originally worth $17,500? Express answer to the nearest dollar.
May 1, 2011

social civics
what is the purpose of a franchise agreement for public utility and how public utilities are regulated
May 1, 2011

chemistry
OF THE FOLLOWING SUBSTANCES, WHICH HAS THE LARGEST AVERAGE SPEED AT 25DEGREES. CO, NH3,H2,N2?
April 30, 2011

geology 245
Power point on factors and forces of geological features for the Barnett Shale
April 30, 2011

Geology 245
I am in need of help with my final project in Geology. I have to create a 12-15slide powerpoint presentation on Factors and Forces of Geological Features, The Barnett Shale. I have the final rubric Final Rubric: |Factors and Forces of Geological Features Objective of Exercise...
April 30, 2011

math
An 11 ounce bag of chips costs $1.99 what is the cost per ounce rounded to the nearest cent? What is the cost per pound rounded to the nearest cent
April 28, 2011

chemistry
Im lost, I dont think Im doing any of it right :/
April 28, 2011

chemistry
I still dont understand part e.
April 28, 2011

chemistry
For part a, would the pH be .523?
April 28, 2011

chemistry
0.5 L of a 0.30 M HCl solution is titrated with a solution of 0.6 M KOH. a)What is the pH before addition of KOH? b)What is the total number of moles of acid? c)What is the pH after addition of 125 mL of KOH solution? d)What volume of the KOH solution is required to reach the ...
April 28, 2011

Chemistry
6.71 X 10^-18
April 27, 2011

Math
I need help solving this using U- Substitution (x^2-4)^2 + (x^2-4) -6=0
April 27, 2011

algebra
Your company would like to know how sales levels affect profits. If too few items are sold, then there is a loss. Even if too many items are sold, however, the company can lose money (likely because of low pricing). It is good to know how many items can be sold for there to be...
April 26, 2011

algebra 2 and trig (math)
Find the value of x in the interval 0 is less than or equal to x and 360 is greater than or equal to x which satisfies the equation cos x - 2 cos x sin x.
April 26, 2011

algebra 2 and trig (math)
Find the positive acute angle that satisfies the equation tan(squared) minus tan = 0.
April 25, 2011

Math
What is happening?
April 25, 2011

Chemistry
How many moles of HCl must be added to 100mL of a 0.100 M solution of methylamine (pKb=3.36) to give a buffer having a pH of 10.0?
April 24, 2011

algebra
x^2+34x+c
April 20, 2011

Physics
A hydrogen atom initially in its ground state (n = 1) absorbs a photon and ends up in the state for which n = 3. What is the energy of the absorbed photon? *I found the energy of the atom at the ground state and at n = 3. I subtracted the final from the initial to get a value ...
April 19, 2011

Physics
a man jumps off a bridge to see how high it is. he measures his time of descent. he is in the air for 3.0 s before splashing into the water below. a. How high is the bridge above the water? b. How fast is the man going as he hits the water?
April 18, 2011

Chem
estimate the aqueous solubility, in milligrams per liter of AgBr(s) at 160 degrees C
April 15, 2011

Chem
For a solution that is 0.280 M HC3H5O2 (propanoic acid Ka=1.3*10^-5) and 0.0894 M HI, calculate the following. Concentration of H30, OH, C3H5O2-, I-
April 14, 2011

PD-20
ur mom
April 13, 2011

math
On the fastest speedways, some drivers reach average of 3 miles per minute. Write a formula that gives the number of miles M that such a driver would travel in X minutes. How far would this driver travel in 38 minutes?
April 11, 2011

math
on the fastest speedways, some drivers reach average speeds of 2 miles per minute. write the formula that gives the number of miles M that such driver would travel in x minutes. How would this driver travel in 37 minutes
April 11, 2011

statistics
"Separate the data by company and do descriptive stats for each. Copy and paste into a Word document, formatting appropriately. “Appropriate” includes formatting to a reasonable and appropriate number of decimals, including a good, descriptive caption for the ...
April 10, 2011

TX Goverment
Does the state (Texas) system for raising revenue rely too much on regressive mechanisms like sales tax, user fees and licenses?
April 10, 2011

math
If you triple 4 and subtract 2 each day, how many days until you have zero?
April 6, 2011

chemistry
100 grams of a liquid completely fill a 200 ml bottle. What is the density of the liquid?
April 5, 2011

physics
The picture tube in an old black-and-white television uses magnetic deflection coils rather than electric deflection plates. Suppose an electron beam is accelerated through a 53.8-kV potential difference and then through a region of uniform magnetic field 1.00 cm wide. The ...
April 4, 2011

Math
(2/$7.5)=(3.5/x) x=$13.125
April 4, 2011

com155
Thank you for your help!!
April 3, 2011

com155
Could you please tell me if the adjectives and adverbs below are correct for my paragraph? Adverbs- responsibly personally not every currently very Adjectives- credit much paying hard minimum one
April 3, 2011

com155
The following is a paragraph regarding my experience with credit cards. I had to use least five adverbs and five adjectives in my paragraph. I have to bold the adverbs and underline the adjectives, the only problem is I am having a hard time figuring out which are adverbs and ...
April 3, 2011

com155
Ok Sorry for the misunderstanding.
April 3, 2011

com155
I need to know the adverbs and adjectives in the paragraph.
April 3, 2011

com155
Having a credit card could get someone into much trouble if it is not used responsibly. I personally have nightmares when it concerns credit cards. I do not like paying interest on something when it is not necessary. I learned how to use credit cards the hard way. I ran up a ...
April 3, 2011

physics 1001
The pressure in each of your car tires is 2.10 105 Pa. The mass of your car is 1690 kg. Assuming that each of your tires bears one-quarter of the total load, what is the contact area of each tire with the road?
April 1, 2011

geometry AGAIN
A
March 31, 2011

math
what part of a day is 45 minutes?
March 28, 2011

rebus puzzle
I need a good rebus sit to help sove some rebus puzzles. thanks!
March 27, 2011

REBUS PUZZLES
These letters are written in large bold print. LIF Next puzzle: A bold diagonal line going from right to left.
March 27, 2011

REBUS PUZZLES
The two letter E's one is over the V and R and the other letter E is under the T and D
March 27, 2011

REBUS PUZZLES
I need help with some rebus puzzles please. T H R O U G H The letters TRUH are in Bold color. E OV RRAT D E
March 27, 2011

algebra
If the cost of a cell phone has decreased 400% during the past 10 years, does that correspond to a cost decrease of four times?
March 24, 2011

Newton's 3rd Law
How can I use Newton's 3rd law on a diver off of a diving board? Could I calculate friction against his feet?
March 22, 2011

Calc. Help ASAP please
the tuition at a college increases exponentially. the current tuition (let it be t=0) is 36,000 and in 2 years it will be 39,690. a) find a formula to predict the cost of tuition in t years. Is this right? And I'm stuck at the end. 39,690= 36,000e^(kt) 11.025=e^(kt) ln(11....
March 22, 2011

science
why is it so important to have only one set of chemical symbols in the world?
March 20, 2011

science
Is it possible to study just one atome?why?
March 20, 2011

algebra
What is the maximum number of cubes measuring 5cm on an edge that can be obtained by cutting a solid cube that measures 1 m on an edge?
March 20, 2011

Calculus
ok so apparently there's no way to express integral |f(x)|dx in standard mathematical functions... which I don't exactly buy... but ya the issue came up when I was trying to evaluate integral |x - 2|dx and apparently this is correct integral |x-2|dx = 2 - [(x-2)^2sgn(2...
March 19, 2011

Calculus
ok so apparently there's no way to express integral |f(x)|dx in standard mathematical functions... which I don't exactly buy... but ya the issue came up when I was trying to evaluate integral |x - 2|dx and apparently this is correct integral |x-2|dx = 2 - [(x-2)^2sgn(2...
March 19, 2011

calculus
use the fact that integral dy/dx dx = integral dy = y find the antiderivative and plug in e and 9 to solve for the constant... i think...
March 19, 2011

physics
How far will a car moving at 50 miles an hour travel in the time it takes to sneeze?
March 17, 2011

math
how do i solve this problem? -4n+5m-2-6n+4-3m
March 15, 2011

physics
A child in a boat throws a 6.00 kg package out horizontally with a speed of 12.0 m/s, Fig. 7-28. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 25.0 kg and that of the boat is 50.0 kg. Magnitude ___m/sDirection
March 13, 2011

Word problem solving with graph equation
Assignment Part I: A system of equations can result in 3 possibilities: consistent, inconsistent, and dependent. Discuss each of these types of solution that can be generated, and describe the graph of each possibility. Part II: Break-Even Analysis and Cost Analysis: As a ...
March 13, 2011

calculas
If sin theta equals two third and zero degrees less than theta less than 90 degrees find cosine theta
March 12, 2011

algebra
The constraints don't show when I cut and paste so I will type them out, sorry! 0 less than or equal to x less than or equal to 10, 0 greater than or equal to y greater than or equal to 5 and 3x + 2y less than or equal to 6
March 9, 2011

algebra
Find the maximum value of the objective function z=24x+7y subject to the following constraints: 1. 0¡Üx¡Ü10, 0¡Üy¡Ü5. 3x + 2y ¡Ý 6
March 9, 2011

physics
A 8.00 kg shell at rest explodes into two fragments, one with a mass of 2.00 kg and the other with a mass of 6.00 kg. If the heavier fragment gains 130 J of kinetic energy from the explosion, how much kinetic energy does the lighter one gain?
March 8, 2011

computer fun
My sister has no websites to go to for fun.She is 10 so what do you suggest?
March 6, 2011

math
during a special promotion, each customer who makes a purchase is given a coupon for a discount of either 10,20, 30,40, or 50 percent. if a customer has an equal chance of receiving any one of the 5 types of discount coupons,what is the probability that the first customer will...
March 6, 2011

Physics
A spiral spring is compressed so as to add U units of potential energy to it. When this spring is instead stretched two-thirds of the distance it was compressed, its remaining potential energy in the same units will be a. 2U/3 b. 4U/9 c. U/3 d. U/9
March 5, 2011

Physics
Two lumps of clay having equal masses and speeds, but traveling in opposite directions, collide and stick together. Which of the following statements about this system of lumps must be true? A. The momentum of the system is conserved during the collision. B. The kinetic energy...
March 5, 2011

Physics
A glider airplane is coasting horizontally when a very heavy object suddenly falls out of it. As a result of dropping this object, the glider's speed will a. increase. b. decrease. c. remain the same as it was.
March 5, 2011

Physics
Cart A, of mass 3.00 kg, approaches and collides with cart B, which has a mass of 7.00 kg and is initially at rest. When the springs have reached their maximum compression, a. cart A has come to rest relative to the ground. b. both carts have the same velocity. c. both carts ...
March 5, 2011

Physics
A proton with a speed of 4.20×104 km/s makes an elastic head-on collision with a stationary carbon nucleus. We can look up the masses of both particles. Which of the following quantities can be calculated from only the known information? A. The velocity of the proton and...
March 5, 2011

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