Saturday

July 30, 2016
Total # Posts: 2,290

**Math**

Is the following series convergent? explain ((2n)!)/((n!)(4^n))
*July 30, 2016*

**MATH**

Does the sequence converge? Work out a=-1^n
*July 29, 2016*

**math**

10th floor
*July 28, 2016*

**MATH**

Solve the integral using trig substitution (1/((x)(x^2+1)))dx
*July 24, 2016*

**MATH**

Integrate 1/(x(x^2+1)) dx using trig substitution
*July 24, 2016*

**Math**

Evaluate the integral using u substitution ((y^3)/((1-y^2)^2))dy
*July 24, 2016*

**Calculus**

A tank in the shape of a right circular cylinder is filled with water (62.5 lb/ft3). It has a height of 8 ft and a diameter of 10 ft. How much work is required to pump all the water to a spout that is 3 ft above the top of the tank?
*July 18, 2016*

**calculus**

A tank in the shape of a right circular cylinder is filled with water (62.5 lb/ft3). It has a height of 8 ft and a diameter of 10 ft. How much work is required to pump all the water to a spout that is 3 ft above the top of the tank?
*July 18, 2016*

**calculus**

A region is bounded by y=2x and y=4sqrt(x). Find the volume when rotated along 1)y=-1 2)the y axis
*July 18, 2016*

**math**

The region in the first quadrant bounded by the 𝑦-axis and the curve 𝑥 = 2𝑦2 − 𝑦3 (graph please) is revolved about the 𝑥-axis. Find the volume?
*July 17, 2016*

**Calculus**

A tank in the shape of a right circular cylinder is filled with water (62.5 lb/ft3). It has a height of 8 ft and a diameter of 10 ft. How much work is required to pump all the water to a spout that is 3 ft above the top of the tank?
*July 17, 2016*

**Economics**

hey writeacher, you will really get from me one day. You are acting over smart. I will smack you.
*July 13, 2016*

**math**

What is the height of a cylinder with a volume of 384π cubic inches and a radius of 8 inches? Round to the nearest tenth of an inch.
*July 13, 2016*

**Physics**

A guitar string is 108 cm long and has a mass of 2.90 g. From the bridge to the support post (L) is 70 cm, and the string is under a tension of 470 N. What is the frequency of the first overtone? Only 1 try left please help.
*July 7, 2016*

**Physics**

Two identical loudspeakers are some distance apart. A person stands 5.70 m from one speaker and 3.00 m from the other. What is the second lowest frequency at which constructive interference will occur at this point? The speed of sound in air is 343m/s. only 1 try left please ...
*July 7, 2016*

**MATH HELP**

A bus leaves a station at 10am and averages 60 mph. Another bus, traveling at 75 mph, leaves the same station 30 mins later following the same route. What time does the second bus catch up with the first bus? I don't know how to work this out at all!
*July 6, 2016*

**Math**

Make four 8s equal 8
*July 2, 2016*

**Maths**

At 3 pm ship A is 20 nautical miles south west of ship B. Assuming that the y- direction is north and the x-direction is east, the velocities of ships A and B can be expressed in knots in vector form as Va=(12,+5) Vb=(-8,-9) (i) Find the velocity of ship B relative to ship A
*June 28, 2016*

**algebra**

Two investments totaling $49,500 produce an annual income of $1770. One investment yields 2% per year, while the other yields 4% per year. How much is invested at each rate?
*June 28, 2016*

**Physics**

A water balloon launcher launches a balloon straight up at a flying kite. If the kite is hovering 75.0 meters off the ground, and the balloon hits it on its upward trajectory with a velocity of 12.2m/s, a) What was the launch velocity of the balloon
*June 19, 2016*

**physics**

A 5.0 m portion of wire carries a current of 8.0 A from east to west. It experiences a magnetic field of 6.0 × 10^–4 T running from north to south. What is the magnitude and direction of the magnetic force on the wire? 2.4 × 10^–2 N upward 2.4 × 10...
*June 13, 2016*

**Chemistry**

Consider the compounds 4-tert-butylcyclohexanol and 4-tert-butylcyclohexanone. Using silica gel plates, which of the two compounds will have the higher Rf value when ethyl acetate is the developing solvent? Which will have the higher Rf value when dichloromethane is the ...
*May 30, 2016*

**Math**

Which ordered pair is not a solution of y= -4x -9 A(-9,27) B(3,-21) C(-6,15) D(5,-28) I have no idea how to do this help please
*May 26, 2016*

**Math**

Which is equivalent to this expression -4(-3x)+5(-7) A. -12x + 35 B. 12x - 35 C. -7x + 12 D. 7x - 12 Which is equivalent to the inequality shown below? X/2 </= -15 A. X >/= 7.5 B X </= 7.5 C X >/= -30 D X </= -30
*May 25, 2016*

**Math**

Write a variable on both sides that has infinite solutions.
*May 24, 2016*

**CIVICS PLS HELP MS. SUE**

Then my second choice would be C. if it isnt correct can you please explain to me?
*May 20, 2016*

**CIVICS PLS HELP MS. SUE**

ich of the following best illustrates the government's role in controlling financial institutions? A. The government directly influences the price of stocks in the stock market by taxing purchases of stock. B. The government limits the amount of loans that individuals can ...
*May 20, 2016*

**math**

@Mrs.Sue
*May 20, 2016*

**math**

Mrs.Sue please help
*May 20, 2016*

**math**

There are 9 candidates running for 3 seats on a committee. How many different election results are possible? A. 36 B. 84 C. 504 D. 56
*May 20, 2016*

**Math **

Anita can clean a typical pool in 8 hours. Chao can clean a typical pool in 6 hours. How long should it take Anita and Chao working together to clean a typical pool? I'd like to know how to work out this problem in order to find the answer.
*May 17, 2016*

**math**

The pressure P, of a gas varies inversely with its volume, V. Pressure is measured in units of Pa. Suppose that a particular amount of a gas is initially at a pressure of 84 Pa at a volume of 36 L. If the volume is expanded to 216 L, what will the new pressure be? I don't ...
*May 17, 2016*

**Chemistry**

A solution contains H2O2 in water. Complete decomposition of the H2O2 in 170 g of this solution yields 5.6 L of O2(g), measured at 0 oC and 101.325 kPa. What is the percentage by mass of H2O2 in this solution? Choose the closest answer. A 10% B 20% C 5.0% D 3.0% E 1.0%
*May 17, 2016*

**Chemistry **

Determine how many grams of Al must react with 2.5 M NaOH in order to produce 40 mL of hydrogen gas at 22°C and 1.02 bar
*May 17, 2016*

**check english please.. romeo and juliet**

Read this excerpt from the prologue to act II of Romeo and Juliet: CHORUS: Now old desire doth in his death-bed lie, And young affection gapes to be his heir; That fair for which love groan'd for and would die, With tender Juliet match'd, is now not fair. Now Romeo is ...
*May 17, 2016*

**Walk Two Moons**

Has anyone read the story walk two moons? If so, please help. where does Sal BEGIN to realize that her mother is really not returning? A) Lake Michigan B) Madison Wisconsin C) Pipestone Minnesota *** D) Sioux Falls, South Dakota please help, I've read the book and tryed ...
*May 14, 2016*

**Pre Algebra**

Is anyone from connexus academy who took the Unit 4 Lesson 7 Polynomials and Properties of Exponents Unit Test?? I need help on the first question...
*May 13, 2016*

**calculus**

Find the area of the region bounded by the graph of f(x)=x(x+3)(x+1) and the x-axis on the interval [-3,0]
*May 12, 2016*

**history**

Evaluate one viewpoint on each of the following in the Andes and the Pampas: the environment, globalization and the economic growth
*May 12, 2016*

**Language Arts**

and is the second question c?
*May 12, 2016*

**Language Arts**

the first one is b then right?
*May 12, 2016*

**Language Arts**

Under a spreading chestnut tree The village smithy stands; The smith, a mighty man is he, With large and sinewy hands; And the muscles of his brawny arms Are strong as iron bands. His hair is crisp, and black, and long, His face is like the tan; His brow is wet with honest ...
*May 12, 2016*

**History**

I'm looking for globalization in the Andes. I'm not looking for answers just maybe a link for help or something? thanks.
*May 12, 2016*

**History**

How does elevation impact ecosystems in South America A. Farmers can grow different crops at different elevations (this one?) B. Plants do not grow above the tree line C. Animals can't live in higher evelations D. Humans settle only in the lowest elevations
*May 12, 2016*

**calculus 1**

Set up the simplified integral and compute the volume created when the area bounded by y=.25x4, y=4, and the y=axis (Quadrant 1) is rotated around the line x=-2
*May 11, 2016*

**Chemistry**

5.88 moles of nitrogen and 16.2 moles of oxygen are mixed until the equilibrium is established, 11.28 moles of nitric oxide are formed calculate the value of equilibrium constant
*May 11, 2016*

**Social Studies**

Blop is correct, I got 100%
*May 11, 2016*

**Physics**

Three dynamics carts have force sensors placed on top of them.(cart 1, with mass of 2.2 kg, has one sensor --> cart 2, with mass of 2.5 kg, has sensors two and then three --> cart 3, with mass of 1.8 kg, has sensors four then five). Each force sensor is tied to a string ...
*May 7, 2016*

**MATH HELP ASAP**

For questions 1–4, find the slope of the following graphs. 1. a. 1/2 b. 2 c. 2 d. -1/2 2. a. 3/2 b. 1 c. -1 d. -3/2 3. a. 2/3 b. 3/2 c. 3 d. -2/3 4. a. 0 b. 1 c. -1 d. undefined For questions 5 and 6, find the slope of the line that goes through the following points. 5. x...
*May 4, 2016*

**HELP MATH ASAP**

For questions 1–4, find the slope of the following graphs. 1. (1 point) 2 –2 – 2. (1 point) 1 –1 – 3. (1 point) 3 – 4. (1 point) 0 1 –1 undefined For questions 5 and 6, find the slope of the line that goes through the following points. 5. (1 ...
*May 4, 2016*

**MATH HELP ASAP**

i dont know i need help
*May 4, 2016*

**MATH HELP ASAP**

identify the sequence as arithmetic, geometric, or neither. please explain answer 1.6,0.8, 0.4, 0.2,...
*May 4, 2016*

**MATH HELP ASAP**

algebraic
*May 4, 2016*

**MATH HELP ASAP**

use the expression to find the value of the 20th term. a. 24 b. 76 c. 80 d. 84
*May 4, 2016*

**algebra**

which algebraic expression represents the sequence shown 4,8,12,16,... a. 4n b. n + 4 c. 4n + 4 d. 4 ( n-1)
*May 4, 2016*

**alegbra help asap **

what are the first 4 terms in the sequence represented by the expression 2n + 3? a. 2,5,8,11 b. 4,5,6,7 c. 5,7,9,11 d. 5,10,15,20
*May 4, 2016*

**PLEASE HELP ASAP ALGEBRA**

indentify the sequence as arithmetic, geometric, or neither. 3,4.5,6,7.5,... a. arithmetic b. geometric c. neither please help i dont know the answer
*May 4, 2016*

**PLEASE HELP ASAP**

a. 9 b. 11.5 c. 15 d. 19.5
*May 4, 2016*

**PLEASE HELP ASAP**

which values will be part of the sequence? 3,4.5,6,7.5,...
*May 4, 2016*

**MATH HELP ASAP**

identify the sequence as arithmetic, geometric, or neither 3, 4.5,6,7.5,...
*May 3, 2016*

**PLEASE HELP ASAP ALGEBRA**

A spinner is divided into 10 equal sections numbered from 0 to 10. you spin the spinner once. what is P ( divisible by 3)? a. 1/3 b. 1/2 c. 2/5 d. 3/10 my answer is d, is that correct?
*May 3, 2016*

**PLEASE HELP ASAP**

Im asking if thats correct
*May 3, 2016*

**PLEASE HELP ASAP**

1.Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the card in a hat. What are the odds in favor of picking an I? a. 5:3 b. 3:5 c. 3:7 d. 1:2 my answer is b? 2. Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the cards in a hat. What are ...
*May 3, 2016*

**PLEASE HELP WITH ALGEBRA**

Damon how did you find those answers though
*May 3, 2016*

**PLEASE HELP WITH ALGEBRA **

Please show me all the steps to solving the problem also you can use comment field to explain the work QUESTION: a box contains 95 pink rubber bands and 90 brown rubber bands. you select a rubber band at random from the box. find each probability. write the probability as a ...
*May 3, 2016*

**Algebra PLEASE PLEASE HELP ASAP**

what ? there are 3 different questions
*May 3, 2016*

**Algebra PLEASE PLEASE HELP ASAP**

1.Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the card in a hat. What are the odds in favor of picking an I? a. 5:3 b. 3:5 c. 3:7 d. 1:2 my answer is b? 2. Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the cards in a hat. What are ...
*May 3, 2016*

**algebra PLEASE HELP ASAP**

please show me the steps that you use to solve the problem. you can also use the comment field to explain the work. QUESTION: 1. what is the probability of selecting a red marble, replacing it, and then selecting a blue marble? show work 2. what is the probability of selecting...
*May 3, 2016*

**algebra PLEASE HELP ASAP**

john but for a) it comes out to be 0.5135135 and for b) it comes out to be 0.4864864 are you sure those are correct??
*May 3, 2016*

**algebra PLEASE HELP ASAP**

Please show me all the steps to solving the problem also you can use comment field to explain the work QUESTION: a box contains 95 pink rubber bands and 90 brown rubber bands. you select a rubber band at random from the box. find each probability. write the probability as a ...
*May 3, 2016*

**math help me asap**

whats 12! divide by (4!8!) i dont know the answer please help
*May 3, 2016*

**algebra PLEASE HELP ASAP**

on question 1 i meant to say the probability of a basketball player hitting a foul shot is 1/3.
*May 3, 2016*

**algebra PLEASE HELP ASAP**

1. the probability of a basketball player hitting a foul shot is 1/3. how many shots would you expect her to make in 90 attempts. a. 30 b. 60 c. 3 d. 45 my answer is b? 2. simplify 8P3. a. 42 b. 336 c. 40,432 d. 56 my answer is d? 3. how many ways can 4 students be chosen from...
*May 3, 2016*

**algebra PLEASE HELP ASAP**

1. A bag contains 9 green marbles and 11 white marbles. You select a marble at random. What are the odds in favor of you picking a green marble? a. 9:20 b. 2:9 c. 11:9 d.9:11 my answer is d? 2. A bag contains 5 green marbles, 8 red marbles, 11 orange marbles, 7 brown marbles, ...
*May 3, 2016*

**Algebra PLEASE HELP ASAP**

1.Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the card in a hat. What are the odds in favor of picking an I? a. 5:3 b. 3:5 c. 3:7 d. 1:2 my answer is b? 2. Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the cards in a hat. What are ...
*May 3, 2016*

**algebra PLEASE HELP ASAP**

Jennifer writes the letters M-O-N-T-A-N-A on cards and then places the cards in a hat. What is the probability of picking an M? a. 1/6 b. 1/7 c.6/1 d.7/1 my answer is b?
*May 3, 2016*

**Algebra **

The vertex of a parabola represented by f(x)=x^2-4x+3 has coordinates of (2,-1). Find the coordinates of the vertex of the parabola defined by g(x)=f(x-2). Explain how you arrived to your answer. My question: Would you move the parabola represented by f(x) 2 spaces to the ...
*May 2, 2016*

**Anatomy and Phys 1**

I have a case study that I need to do and I need someone to help simplify it for me. I would greatly appreciate it and thanks in advance! Beginning with depolarization at the neuromuscular junction, describe the normal sequence of events which lead to muscle contraction and ...
*April 28, 2016*

**algebra**

A soccer ball is kicked toward the goal. The height of the ball is modeled by the function h(t) = −16t2 + 48t where t equals the time in seconds and h(t) represents the height of the ball at time t seconds. What is the axis of symmetry, and what does it represent? t = 1....
*April 27, 2016*

**Language Arts, check!!!**

Actually nvm I can confirm the other answers too. The answers B C A D are correct for the "unit 3 Lesson 13: Read: Kid Territory: Why Do We Need Zoos?"
*April 25, 2016*

**Language Arts, check!!!**

It depends on the assignment. If you are on a "unit 3: dramatic transformations lesson 12: read: zoos: joys or jails?" then the following answers are correct: B D A A However, I cannot confirm the answers for any other assignment.
*April 25, 2016*

**statistics**

A math test consists of 17 multiple choice questions, each with five possible answers (a, b, c, d, e), only one of which is correct. Assume that a student takes the test and randomly answers the questions. What is the probability that the student will get no questions correct?
*April 24, 2016*

**Calculus**

a(t)=4sin3t;v(0)=1,s(0)=6 I'm trying to find expression for s(t). Should I wait till the end to add find and add constant. I got [1/9(13t-4sin(3t))+6] and it was wrong.
*April 24, 2016*

**Chemistry**

H3O conc will be 0.0045M because HNO3 is a strong acid
*April 24, 2016*

**chemistry**

I posted a question several days ago: The pH of human blood needs to be between 7.35 and 7.45. You want to prepare a buffer solution that gives a pH of 7.40. You decide to use a sodium phosphate buffer: the acid is H2PO−4 and the conjugate base is HPO2−4 . You want...
*April 24, 2016*

**chemistry**

Thank you, i figured out where I made the error.
*April 23, 2016*

**chemistry**

Hi, I am trying to find the pH of a buffer I created and then added NaOH to. This is my data: total volume of solution 34.2 mL [NaOH] before reaction 6.0 [HOAc] before reaction .8 M [OAc-] before reaction .4 M [HOAc] after reaction 0 M [OAc-] after reaction 5.2 M So, how would...
*April 23, 2016*

**chemistry**

Consider the following reaction. 2 CO (g) + O2 (g) −→ 2 CO2 (g) What is most likely true about the entropy change for this reaction? Why would the delta s of the rxn be less than zero? thanks.
*April 22, 2016*

**Chemistry**

thank you
*April 22, 2016*

**Pre Algebra**

Anonymous you are wrong...I used Kelsey's answers and got 100%
*April 20, 2016*

**Chemistry**

In a student's experiment, when 40 mL of 6% (w/w) hydrogen peroxide solution was reacted with 10 mL 0.5 M FeCl3 solution, a ΔrH of -3,382 J was calculated. Calculate ΔH for this reaction in kJ mol-1. Give your answer to 2 decimal places, do not include the units ...
*April 19, 2016*

**Biology , AP Biology**

which of the following are autotrophs ? A. plants , some protists and some bacteria B. plants C. plants and some bacteria D. plants and some protists
*April 16, 2016*

**calculus**

A 5.5 foot tall woman walks at 6ft/s torward a street light that is 16.5 ft above the ground. what is the rate of change of the length of her shadow when she is 14ft from the street light? At what rate is the tip of her shadow moving? How do I get the equation for this and how...
*April 14, 2016*

**physics**

If you launch a marble out of a launcher on a table with a given angle, and you know that range( distance it travelled) and time travelled ( if needed). The only force acting upon is gravity. How would you find the initial speed or velocity of the launcher? Is there a formula?
*April 12, 2016*

**Math**

Find how many numbers bigger than 2,999 and less than 8,999 can be formed from the odd digits, if no digits can be repeated.
*April 11, 2016*

**Chemistry**

Nitric oxide is formed and the equation is N2 + O2 <--> 2NO Calculate the equilibrium constant now?
*April 4, 2016*

**College Algebra**

3100 is correct, the typo is 2900. Thank you for helping.
*March 31, 2016*

**College Algebra**

Write a sentence explaining the meaning of the slope and y-intercept for the given linear relation. According to the Statistical Abstract of the United States, the number of crimes, C, reported since 1998 is given by the equation: C=31000-29t where t is in years. A. What is ...
*March 31, 2016*

**math**

Weights of women are normally distributed with mean 143 pounds and standard deviation 29 pounds. If 36 women are randomly selected, what is the probability that their mean weight is between 120 and 160 pounds? Round your answer to two decimal places.
*March 31, 2016*