Thursday

September 3, 2015
Total # Posts: 83,852

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by y= x^2, y=0, and x=3 about the x-axis.
*May 7, 2015*

**Math **

Hint: 6% x $1,000,000 / $1,000,000 – {20% x ($1,000,000 – (6% x $1,000,000))] = ?
*May 7, 2015*

**economics**

sick
*May 7, 2015*

**Technology in the classroom**

A software package that you would like to run on your classroom computer list
*May 7, 2015*

**Chemistry**

Zn + 2 HCl = H2 + ZnCl2 / When 25.0 g of Zn reacts, how many L of H2 gas are formed at 25 degrees Celsius and a pressure of 854 mmHg?
*May 6, 2015*

**Math**

Jeanine used 21/2 cups of flour to make muffins and 1 3/4 cups of flour to make biscuits. After borrowing 1/4 cup of flour,she had 2 1/4 cups left to make bread. How much flour did she have to begin with?
*May 6, 2015*

**algebra**

Just use the slope formula. m = rise / run. m = y2 - y1 / x2 - x1 If it's easier for you, label them. (-4 [x1], -3 [y1]), (4 [x2], 3 [y2]
*May 6, 2015*

**Irrational or Not**

You are correct. the square root of two is not a rational number, so twice it is not rational.
*May 6, 2015*

**math**

write 10 1/2% of 60
*May 6, 2015*

**chemistry**

20 g NaOH are dissolved in 1 L H2O. What is the N of the NaOH solution?
*May 6, 2015*

**Algebra**

Thanks - I had a wrong calculation in the first two term problems that gave me the wrong "d", giving me the wrong answers. Thanks for the help.
*May 6, 2015*

**Trig**

Find each value if sin A = 12/13 with 90 degrees <= A <= 270 degrees and if sin B = -7/25 with -90 degrees <= B <= 90 degrees. sin(A - B) sin(A + B)
*May 6, 2015*

**Math**

What is the exact value of sin(-15 degrees)?
*May 6, 2015*

**Chemistry**

help
*May 6, 2015*

**Life orientation**

Xenophobia is the hatred of foreign people in a country or community seeing them prospering by their own work that we can't even do ourselves
*May 6, 2015*

**Life orientation**

orange farm
*May 6, 2015*

**Pre algebra**

The purchase price of a book is $35.85 the sales tax rate is 6.5% how much is the sales tax to the nearest cent what is the total cost of the book
*May 6, 2015*

**math**

1. two circles. x^2+y^2-16x-8y+35=0 and x^2+y^2=5 are given. a. write the equations in the standard form. b.prove that the circles touch each other. c.hence calculate the equation of their common tangent 2. find the equation of a. circle. with centre c(2;3) and which I is the ...
*May 6, 2015*

**Trig**

secθsinθ is equivalent to: Ans: tanθ?
*May 6, 2015*

**Social Studies**

If you mean WW2, then you are correct. The attack on Pearl Harbor was not in WW1.
*May 6, 2015*

**math**

Suppose the matrix A has eigenvalues lambda_1 = -1, lambda_2 = 1, lambda_3 = 2, with corresponding eigenvectors v_1 = [0 5 3]^T, v_2 = [2 0 1]^T, v_3 = [1 -1 0]^T. If you diagonalize A as A = PDP^-1 with P = [2 2 0; p_21 p_22 2; p_31 p_32 p_33], D = [2 0 0, 0 1 0; 0 0 -1], ...
*May 6, 2015*

**Chemistry**

Use the equation below to answer the following question. How many grams of calcium chloride are produced from 19.3 g of HCl? 2HCl + Ca(OH)2 à 2H2O + CaCl2 Give your answer in correct sig digs and correct label.
*May 6, 2015*

**chemistry**

nm,
*May 6, 2015*

**math**

A. determine the equation of the circle passing through points A(3;2) B(8;12) and C(-6;-2) B. a chord of the circle x^2+y^2=50 has a midpoint at (6;3). determine the equation of this chord.
*May 6, 2015*

**Precal **

Find the limit if it exists. 1. Lim x--> 3 (square root of x+1) -2 over (x-3)
*May 6, 2015*

**chemistry**

226 / 1.7 = 132.94 132.94 x 2.8 = ? Are there any answer choices? It'd be helpful if there was any
*May 6, 2015*

**Chemistry**

(460 x 0.387) (232.0 - 34.5) = 178.02 (197.5) = 35158.95 J
*May 6, 2015*

**math**

Click the second Related Questions labeled statistics in all lower case, it's there for ya.
*May 6, 2015*

**Chemistry**

Evacuated glass ampules is held at 1000 degree C with a perfect vacuum inside.estimate e steady state leak rate per unit area of nitrogen gas into th e ampule.the diffusivity of nitrogen gas is 10^-11 m^2/s.wall thickness of ampule is 0.5 mm.surface concentration of nitrogen ...
*May 6, 2015*

**Math**

51 students?
*May 6, 2015*

**Venezuela **

why did this country fall into dictatorship
*May 5, 2015*

**L.A**

what is the participle phrase int he sentence? Quickly grabbing my lunch, I raced out the door to the bus. A. grabbing my lunch B. I raced C. out the door D. to the bus What is the prepositional phrase in this sentence? Late last night there was a loud knock at the door. A. ...
*May 5, 2015*

**math**

Two boats leave a port at the sametime. The first travels at 15km/hr on a bearing of 135 degree. While the second travels at 2km/hr on a bearing of 63 degree . If after 2hours the second boat is directly North of the first boat, calculate their distance apart.
*May 5, 2015*

**Business Statistics**

876
*May 5, 2015*

**Math**

If the volume of a cone is 1/3 pi r^2 h, then how can it also be 1/3 pi r^3?
*May 5, 2015*

**English**

Can someone please tell me if this poem is in iambic pentameter? I really don't understand it. Thank you. I love a boy who will never be mine. When he speaks, I don't hear anything else. He is like sunshine on a gloomy day. When he laughs it sounds like he is singing, ...
*May 5, 2015*

**MATH ONE QUESTION!**

The student council is making six right triangular pennants to promote school spirit. Each right triangle is 9 inches high and 2 feet long. In square feet, what is the total area of six pennants.
*May 5, 2015*

**LO **

hi I'm new plz help i need I four factors that could threaten or limit the core function of the media
*May 5, 2015*

**English**

(Speech ) English is the language of opportunities. Why bother to teach indigenous languages? I
*May 5, 2015*

**math**

I am trying to find the eigenvalues . They are 0 and 2 but i keep on just getting 0. its a4X4 matrix. [ 1 1 0 0 1 1 0 0 0 0 0 0 0 0 0 0]
*May 5, 2015*

**English**

It is good but not good enough. Do I need a comma before "but"?
*May 5, 2015*

**math**

thanks alot now I understand
*May 5, 2015*

**math**

a. the line y=7x cuts the circle x^2+y^2=50 at A and B. find the coordinates of A and B. b. show that C(5;5) lies on the circle. c. show that ACB angle C=90degrees. what can you deduce about AB? d.find the equation of the tangent to the circle at C
*May 5, 2015*

**geometry**

EF is a median of trapezoid ABCD. If the length of EF is 14x, and the length of CD is 20x, what is the length of AB in terms of x?
*May 5, 2015*

**English**

The passage below contains a total of ten pronouns. How many of the pronouns in the passage below are in the nominative case? "Teach me, O Lord the way of thy statutes; and I shall keep it unto the end. Give me understanding and I shall keep thy law; yea, I shall observe ...
*May 5, 2015*

**Math**

Such that 5 is less than or equal to d is less than or equal to 100. It wouldn't show the sign.
*May 5, 2015*

**Math**

The electrical resistance, r ohms, of 1,000 ft of solid copper wire at 77¡ãF can be approximated by the model r = 10,770 / d^2 - 0.37 for any wire diameter, d mils (1 mil = 0.001 inch), such that 5 ¡Ü d ¡Ü 100. What is the approximate ...
*May 5, 2015*

**Math**

7200 x 186000 = 1339200000 what we do next is round 9 units to the left, which leaves us with 1.34. Scientific notation. Final answer is 1.34 x 10^9. K.
*May 4, 2015*

**Math**

There are 7200 seconds in 2 hours. 2 x 60 x 60
*May 4, 2015*

**Math**

Traveling at approximately 186,000 miles per second, about how many miles does a beam of light travel in 2 hours? F. 3.72 x 10^5 G. 2.23 x 10^6 H. 2.67 x 10^7 J. 6.70 x 10^8 K. 1.34 x 10^9
*May 4, 2015*

**Math**

If the inequality | a | > | b | is true, then which of the following must be true? A. a = b B. a =/ b <----- is not equal sign C. a < b D. a > b E. a > 0
*May 4, 2015*

**eng 122**

what type of language is most effective when making a po
*May 4, 2015*

**geometry**

the Parkers are installing a wooden fence in the back yard they have 330 feet of wood the lip can be no more than 90 feet write and solve equality define the max width of the fence
*May 4, 2015*

**Math**

a right angled triangle has a perimeter of 96.22. if the hypotenuse is 40 cm. how long are the other 2 sides. The answer is 25 and 31.22
*May 4, 2015*

**Math**

a cylindrical cup is made so that the sum of its diameter and its height is 25 cm. find the dimensions of the cup so that the surface area of the cup is a maximum. The answers are. D= 50/3. H=25/3. But how do u get that
*May 4, 2015*

**Math**

The sum of two numbers is 37. The sum of their squares is 756.5. Find the two numbers The answers are 12.5 and 24.5. But I keep getting 44.69 and -7.69
*May 4, 2015*

**Math**

A toy rocket is launched with an initial velocity of 180 m/s. The height of the rocket, in metres, can be modelled by h = –5t2 + 180t, where t is the time in seconds the rocket is in the air. How long will the rocket stay above a height of 1000 m Answer: 22.3 s The answer...
*May 4, 2015*

**Math**

a straight section of railroad track crosses two highways at points that are 400m and 600m, respectively, from an intersection. determine the dimensions of the largest rectangular lot that can be laid out in the triangle formed by the railroad and highways.
*May 4, 2015*

**Chemistry**

1. What is the molar of a sodium bicarbonate solution prepared from 150 g of NaHCO3 in 150 mL solution? 2. What mass of glucose (C6H12O6) is needed to prepare a solution of 10 M, 5 L solution? 3. What volume in liters of a 4.0 M Ca(NO3)2 is needed to provide 50 g Ca(NO3)2?
*May 4, 2015*

**American Goverment**

Yup. You're correct.
*May 4, 2015*

**Math**

Thank you Ms. Sue :).
*May 4, 2015*

**Math**

Do I have to square root 49 and 64?
*May 4, 2015*

**Math**

If a^2 = 49 and b^2 = 64, which of the following CANNOT be a value of a + b? F. -15 G. -1 H. 1 J. 15 K. 113
*May 4, 2015*

**math**

Which hill described in the table is the steepest? (Table) Street: Horizontal (ft): Vertical Rise (ft): Dixie Hill 60 20 Bell Hill 60 40 Liberty Hill 60 30 A. Bell Hill; it rises 2/3 foot for every 1 foot of horizontal travel. B. Dixie Hill; it rises 1 foot for every 3 feet of...
*May 4, 2015*

**Math**

2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30 9: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90 15: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150 so the LCD is 90
*May 4, 2015*

**Math**

I'm sorry. I don't know what I'm doing.
*May 4, 2015*

**Math**

2 x 9 x 5 = 90. I realized my mistake.
*May 4, 2015*

**Math**

Oh. I apologize.
*May 4, 2015*

**Math**

Because 2 x 9 x 15 = 90
*May 4, 2015*

**Math**

Will it be 90?
*May 4, 2015*

**Math**

What is the least common denominator when adding the fractions a / 2, b / 3, c / 9, and d / 15? A. 45 B. 90 C. 135 D. 270 E. 810
*May 4, 2015*

**math**

I don't think they all do??
*May 4, 2015*

**math**

Which quadratic rule represents the data in the table? x: -1 | 0 | 1 | 2 | 3 Y: 4 | 5 | 4 | 1 | -4 A. y= -2x^2 + 5 B. y= -x^2 + 5 C. y= x^2 - 4 D. y= x^2 + 5 Is it A or C?
*May 4, 2015*

**acting**

I've wanted to do acting for about a year, I did a lot of research so I may know a little of what to do. Just so you know this is a website to help with home work, not acting, but I can help just a little. You need to take acting classes/lessons. Plays can be the start, if...
*May 4, 2015*

**math**

idk either
*May 4, 2015*

**Math.**

Which quadratic rule represents the data in the table? x: -1 | 0 | 1 | 2 | 3 Y: 4 | 5 | 4 | 1 | -4 A. y= -2x^2 + 5 B. y= -x^2 + 5 C. y= x^2 - 4 D. y= x^2 + 5 Is it A or C?
*May 4, 2015*

**Math**

Which hill described in the table is the steepest? (Table) Street: Horizontal (ft): Vertical Rise (ft): Dixie Hill 60 20 Bell Hill 60 40 Liberty Hill 60 30 A. Bell Hill; it rises 2/3 foot for every 1 foot of horizontal travel. B. Dixie Hill; it rises 1 foot for every 3 feet of...
*May 4, 2015*

**computer**

thanks
*May 4, 2015*

**computer**

plz helpz
*May 4, 2015*

**computer**

Why do we need information?
*May 4, 2015*

**math**

the answer is $2.22. you can get the answer by adding how much Dan spent on the berries, $4.53, and peaches, 13.25 all together, and subtracting that number from the $20 dollars he paid. :-)
*May 4, 2015*

**chemistry**

a 12ml sample of 0.4m silver nitrate solution is mixed with 8 ml of 0.8m sodium chloride solution. determine the identity of precipitate and the number of grams produced.
*May 4, 2015*

**Math**

Carmen and Susan are members of their school’s running club. The length of the circular track at the school is 1/10 of a mile. In the time it takes Carmen to run 3 times around the track, Susan runs 4 times around the track. A. In the time it takes Carmen to run 12 times ...
*May 4, 2015*

**physics**

Find the total change in the internal energy of a gas that is subjected to the following two-step process. In the first step the gas is made to go through isochoric heating until it gains 5963 J and its pressure is 3.12 105 Pa. In the second step it is subjected to isobaric ...
*May 4, 2015*

**science**

correct, thank you
*May 4, 2015*

**science**

When a tennis ball smashes into a tennis racket, the ball temporarily changes shape as it compresses against the racket. Which type of energy is temporarily stored with the ball as it is compressed? (1 point) elastic potential kinetic electrical potential
*May 4, 2015*

**English**

no :)
*May 4, 2015*

**science**

3. A 10.0-kg animal is running at a rate of 3.0 m/s. What is the kinetic energy of the animal? (1 point) a. 3.3 J b. 30.0 J c. 45.0 J d. 90.0 J
*May 4, 2015*

**science**

that was correct, thank you:)
*May 4, 2015*

**science**

Two identical masses are moving down a slope. One mass is traveling twice as fast as the other mass. How does the kinetic energy of one mass compare to the other? a. The faster object has the same kinetic energy as the slower object. b. The faster object has less kinetic ...
*May 4, 2015*

**Ms. Sue PLZ HELP!!!(science)**

Levi Ackerman IT IS Y,Z,X/ I checked my book!!
*May 4, 2015*

**Ms. Sue PLZ HELP!!!(science)**

THX!!
*May 4, 2015*

**Ms. Sue PLZ HELP!!!(science)**

A portion of the amino acid sequence of an enzyme from a worm is shown below: -Q-Q-Q-Q-N-N-N-C-C Analyze the same potion of the same enzyme taken from several other organisms. Place them in order from most closely related to the worm to most distantly related to the worm. -Q-...
*May 4, 2015*

**math**

Joe starts a gym. In the first year, 300 people join. If the membership grows at an annual rate of 4%, how many members will there be after 5 years?
*May 4, 2015*

**math**

1. A(-3;4) is a point on a circle with centre at the origin. a.determine the coordinates of B, if AB is a diameter. b. Show that point C(0;5) lies on this circle. c.show that ACB has a magnitude of 90degrees. 2.a.ddetermine the equation of the circle with AC as diameter, if A ...
*May 4, 2015*

**Precal **

Evaluate the limit of f(g(x)) as x approaches 0. F(x)= 4x-4 G(x)= 8x+1
*May 4, 2015*

**creative expression and play**

i think that it is a
*May 4, 2015*

**creative expression and play **

Historically, toys have reflected the times in which they have been created. today's children sometimes play with media related figures taht: A. limit the imaginative possibilities of creative play B. develop the range of visual parameters C. encourage technological ...
*May 4, 2015*

**math**

The side of a square is measured to be 16 ft with a possible error of ±0.1 ft. Use differentials to estimate the error in the calculated area. Include units in your answer.
*May 4, 2015*

**Art and Creative Development**

i think A
*May 4, 2015*