Wednesday
May 4, 2016

# Posts by abby

Total # Posts: 1,036

Calculus
let V be volume of the solid obtained by rotating about the y-axis the region bounded by y=sqrtx and y=x^2. find V both by slicing and by cylindrical shells. in both cases, draw a diagram to explain your method. I'm SO stuck!
September 15, 2010

Calculus
find volume of solid obtained by rotating region bounded by curves y=x and y=sq.rt x, about line x=2
September 15, 2010

shoud i add a predicate or a subject to this sentence this baseball team.
September 8, 2010

Identify the ROI and NPV of the wireless order-taking system. ...
September 2, 2010

Math
So i was given a graph of h(x) and i am supposed to approximate h^-1(3) but i'm not sure about how to do it. could anyone tell me how to find the solution? THANKS!
August 24, 2010

Algebra 2
Make a table with a process column to represent each pattern. Write an expression for the number of tiles in the nth figure. The picture is a column of squares that is 4X6. In each figure its subtracting a square.
August 18, 2010

Helpppp!!!!!!!!!!I need help on the acrostic. Can you people help? Okay, I need to do an acrostic on photosynthesis, devoured,and extinct.....Thank you if you help.....Rlyyyyyy THANKS
August 16, 2010

Science
Why does the water of lakes and oceans look alike?
August 15, 2010

maths
z = x-y+4 z = y-w-3 z = w-x+5 Based on the system of equations above, what is the value of z? a) 2 b) 3 c) 4 d) 6 e) 12
July 11, 2010

economics
they are economically inefficient
June 28, 2010

math
What you saying
June 9, 2010

math
Thank you I thought so
June 9, 2010

Math
A survey was made of 200 students to study their use of the public library system. The findings were as follows: 60 used the Reader’s Guide. 28 used both the card catalog and the information booth. 68 used the information booth. 83 did not use the library. 43 used only ...
June 6, 2010

Chemistry
Predict the effect of each of the following on the indicated equilibrium system in terms of which reaction will be favored (forward, reverse, or neither) H2(g)+Cl2(g)<=>2HCl(g) +184 kJ A)addition of Cl2 B)removal of HCl C)increased pressure D)decreased temperature E)...
May 18, 2010

math
Without graphing, identify the slope and the y-intercept. y = -4x + 5
May 16, 2010

algebra
Use the discriminant to determine how many real-number solutions the equation has. s2 - 5s + 6 = 0
May 16, 2010

health
List 3 components of the environment Briefly describe the major pollutant in each category and their effect on health Explain how sustainable development affects the environment
May 14, 2010

health
List 3 components of the environment Briefly describe the major pollutant in each category and their effect on health Explain how sustainable development affects the environment
May 14, 2010

%%%%
thanks dr bob!! I remember now!
May 4, 2010

%%%%
what is the formula for finding a percentage of a dollar amount??? ex. 30 % of 233 is ??? Please help me! Thanks!
May 4, 2010

40/100=4/10=2/5 a percent is over 100-then reduce
May 4, 2010

Trig
How do I solve this problem? tan (30° + x)
May 2, 2010

Chemistry
If one strand of DNA has the sequence AATCCGTAGCTC, what would be the sequence of its complementary strand?
April 28, 2010

physics
What is cice and Hfice on here?
April 26, 2010

Calculus
Use the given vector to find a vector b such that compab = 4. a = ‹4, 0, 1› ‹s, t, >
April 17, 2010

Calculus
At what points does the helix r = sin(t), cos(t), t intersect the sphere x^2 + y^ 2 + z^2 = 26? (Round your answers to three decimal places. Enter your answers from smallest to largest z-value.)
April 16, 2010

Physics
why is the second part incorrect
April 16, 2010

Physics
An oscillator with a mass of 520 g and a period of1.2 s has an amplitude that decreases by 2.20% during each complete oscillation. At what time will the energy be reduced to 15.0% of its initial value?
April 16, 2010

Ag Bio
I'm stuck on a few questions. If you can just answer what you can- 25. Describe the role of an operon in a prokaryotic cell, and give an example of how an operon works. 31. The word transcribe means "to write out," and the word translate means "to express in...
April 15, 2010

Osciallations
You pull a simple pendulum of length 0.237m to the side through an angle of 3.50 degrees and release it. How much time does it take the pendulum bob to reach its highest speed? Take free fall acceleration to be = 9.80 . How much time does it take if the pendulum is released at...
April 15, 2010

Ag. Bio
Last one, thanks for the help guys =) 34. Recall what happens in mitosis and meiosis. Describe how a given amount of a cell's DNA might be alike or different after each process was complete.
April 14, 2010

Ag. Bio
Been working on this forever... Thanks =) 33. A researcher identifies the nucleotide sequence AAC in a long strand of RNA inside a nucleus. In the genetic code, AAC codes for the amino acid asparagine. When that RNA becomes involved in protein synthesis, will asparagine ...
April 14, 2010

Ag. Bio
=) Thanks 32. How does the possible impact of a chromosomal mutation that occurs during meiosis differ from that of a similar event that occurs during mitosis?
April 14, 2010

Ag. Bio
This is the hardest question I can't figure out. Thanks =) 31. The word transcribe means "to write out," and the word translate means "to express in another language." Review the meanings of transcription and translation in genetics. How do the ...
April 14, 2010

Ag. Biology
I'm stuck on 10 questions on my homework, I'll post them separate. 25. Describe the role of an operon in a prokaryotic cell, and give an example of how an operon works.
April 14, 2010

statistics
The time to complete a standardized exam is approximately normal with a mean of 70 minutes and a standard deviation of 10 minutes. Using the 68-95-99.7 rule, if students are given 90 minutes to complete the exam, what percentage of students will not finish?
April 13, 2010

Social Studies
i need help on learning about jefferson davis
April 11, 2010

Algebra
121 and 144
April 6, 2010

Chemistry
I got answers for a and b but I don't know where to begin on c
April 5, 2010

Chemistry
For a I have .948 mol Li3N and for h20 I have 17.07848544 grams so now what do I do
April 5, 2010

yes actualy thank you! :)
April 4, 2010

I am doing a project on Percy Jackson and the Olympians: The Lightning Thief. I need to five 5 Hero's Journey Archetypes, but i can't seem to think of any except for 2 which are The Underworld and The Hero. I do not have my archetypes list with me so i am trying to do ...
April 4, 2010

statistics
Scores on a test have a mean of 66 and Q3 of 81. The scores have a distribution that is approximately normal. Find the standard deviation. Round your answer to the nearest tenth.
March 29, 2010

CHEM
The first excited state of the hydrogen atom is separated from the ground state by 10.2 eV. (a) At what wavelength does this occur and what is the energy difference in kJ mol-1
March 26, 2010

Physics
the ski boat is traveling at 15 m/s and the tension in the rope is 80 N. If the boat does 3500 J of work on the skier in 54.6 m, what is the angle between the tow rope and the center line of the boat?
March 9, 2010

Physics
Initially sliding with a speed of 2.3 m/s, a 2.0 kg block collides with a spring and compresses it 0.41 m before coming to rest. What is the force constant of the spring?
March 9, 2010

Pre-Cal
1) Use the half-angle formulas to determine the exact values of the sine, cosine, and tangent of the angle. 67 degrees 30'
March 9, 2010

Approximate the equation's soultions in the interval (o, 2pi). If possible find the exact solutions. sin 2x sinx = cosx I do not know where to start.
March 6, 2010

Pre-Cal
Approximate the equation's soultions in the interval (o, 2pi). If possible find the exact solutions. sin 2x sinx = cosx I do not know where to start.
March 6, 2010

physics
79622?
March 3, 2010

Physics
Jill of the Jungle swings on a vine 7.0 m long. What is the tension in the vine if Jill, whose mass is 65 kg, is moving at 2.3 m/s when the vine is vertical?
March 2, 2010

Physics
When you take your 1200 kg car out for a spin, you go around a corner of radius 51 m with a speed of 12 m/s. The coefficient of static friction between the car and the road is 0.88. Assuming your car doesn't skid, what is the force exerted on it by static friction?
March 2, 2010

MATH
Elsie is starting a recycling club at her school and hopes to use the money earned from recycling cans to buy recycling bins for the school. Elsie first needs to figure out how much the cans that can be collected at her school will weigh, so she starts by weighing the cans in ...
March 2, 2010

math
The recycling center pays 25 cents per kg for aluminum cans. If her school recycles 2070 cans each day, how much money will Elsie earn each day by recycling?
March 2, 2010

Pre-Cal
1) My last question was wrong. The question should read: Fill in the blanks As x --> pi+, sin x --> ? and csc x --> ? I do not understand this!
February 28, 2010

Pre-Cal
Error. Im sorry the question is As x --> pi+, sin x --> ? and csc x --> ?
February 28, 2010

Pre-Cal
1) Fill in the blanks As x --> pi^2, sin x --> ? and csc x --> ? I do not understand this!
February 28, 2010

1) Use the cofunction identites to evaluate the expression without the aid of a calculator. cos^2 18 degrees + cos^2 72 degrees. Would I use the forumula cos(pi/2 - Q) = sin Q
February 28, 2010

1) Use the cofunction identites to evaluate the expression without the aid of a calculator. cos^2 18 degrees + cos^2 72 degrees.
February 28, 2010

chemistry
What would be happening in this reaction? 2Ag^+(aq) + CO3^2-(aq) + HNO3 (aq) -----> 2AgNO3(s) + H20(l) + CO2(aq)
February 26, 2010

chemistry
Confused
February 25, 2010

Pre-cal
1) Solve the equation sinx(sinx+1) = 0 I am having trouble with the first step. Could I do sin x^2 + 1 =0?
February 23, 2010

Physics
A child goes down a playground slide with an acceleration of 1.24 m/s^2. Find the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 32.0 degrees below the horizontal.
February 23, 2010

Physics
A farm tractor tows a 3800-kg trailer up a 19 degrees incline with a steady speed of 3.0 m/s. What force does the tractor exert on the trailer? (Ignore friction.)
February 22, 2010

Pre-Cal(Urgent!!)
Find all the solutions of the equation in the interval (0,2pip) sin(x + pi/6) - sin(x -pi/6) = 1/2 I am only stuck on the last part. I have 2sinx(sqrt3/2) = 1/2 Does the 2 cancel out with the sqrt 3/2. I am not sure what to do.
February 20, 2010

Pre-Cal
Find all the solutions of the equation in the interval (0,2pip) sin(x + pi/6) - sin(x -pi/6) = 1/2 I am only stuck on the last part. I have 2sinx(sqrt3/2) = 1/2 Does the 2 cancel out with the sqrt 3/2. I am not sure what to do.
February 20, 2010

Math
1) Find the angle of depression from the top of a lighthouse 250 feet above water level to the water line of a ship 2 miles off shore. arc tan 10560/250 = 88.64 ft Is this correct? 2) A passenger is in an airplane flying at n altitude of 10 kilometers sees two towns directly ...
February 18, 2010

Physics
A swimmer runs horizontally off a diving board with a speed of 3.14 m/s and hits the water a horizontal distance of 2.16 m from the end of the board. How high above the water was the diving board?
February 16, 2010

Physics
A cork shoots out of a champagne bottle at an angle of 39.0 degrees above the horizontal. If the cork travels a horizontal distance of 1.10 m in 1.40 s, what was its initial speed?
February 16, 2010

Physics
A soccer ball is kicked with a speed of 9.80 m/s at an angle of 25.0 degrees above the horizontal. If the ball lands at the same level from which it was kicked, how long was it in the air?
February 16, 2010

Physics
In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 25 m/s at an angle of 39 degrees above the horizontal. (a) How long does it take for the ball to reach the wall if it is 3.7 m away? (b) How high is the ...
February 16, 2010

Physics
In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 3.9 m/s at an angle of 25 degrees above the horizontal. It is released 0.75 m above the floor. What horizontal distance does the ball cover before bouncing?
February 16, 2010

1) For a person at rest, the velocity v (in liters per second) of air flow during a respiratory cycle is V = 0.85 sin pi(t)/ 3 where t is the time in seconds. (Inhalation occurs when v > 0 and exhalation occurs when v < 0) A) Find the time for one full respiratory cycle ...
February 12, 2010

MAth
yuhh know what im asking yuhh guys okayy! nd i know what iht is im not stupid!
February 10, 2010

MAth
what do you call a person who buys and sells bugs?
February 10, 2010

Physics
I need to solve this equation. 3E -9 N / 1.25 E -19 C I do not know what to do with the -9 and -19.
February 10, 2010

social studies
why was the Spanish-American War important to America?
February 10, 2010

social studies
Why was Theodore Roosevelt an American Hero?
February 10, 2010

science
February 1, 2010

Physics
1) The question asked to find the ionosphere reading for your area today and gives you s web site. I went on the website but I have no idea how to find the reading for West Palm Beach. Any suggestions?
January 26, 2010

2/5 of 40 What is the formula to find this????
January 11, 2010

Science
How is the pH of a strong acid compared to a weak acid of the same concentration?
January 10, 2010

math
a bank teller had \$2750 in 10 dollar bills and5 dollar bills he had twice as many10 dollar billsas 5 dollar bills how many of each bill does he have
January 8, 2010

english
1. might be going 2.did give
January 8, 2010

wrighting
I have to wright a report on the erely explors and evrything i wright dous not make sence
January 7, 2010

come up with some ideas first
January 7, 2010

science
What are the seven energy levels and tell the maximum number of electrons that can fit in each.
December 8, 2009

social
what are two actions outlawed by the english bill of rights?
December 2, 2009

social
according the the english bill of rights, how is freedom of speech protected?
December 2, 2009

History
Comparing the different diplomacy styles of Prestidents Roosevelt, Taft, & Wilson, Roosevelt beheved the U.S. should respond to foreign crises, not by threats, but by military action, thus, the "big stick" approach. Taft hoped to modifty the American foreign policy ...
November 30, 2009

History
Compare the different diplomacy styles of Presidents Roosevelt, Taft, and Wilson.
November 30, 2009

MATH
Jones Company had 100 units in beginning inventory at a total cost of \$10,000.The company purchased 200 units at a total cost of \$26,000. At the end of the year, Jones had 80 units in ending inventory. Compute the cost of the ending inventory and the cost of goods sold under (...
November 30, 2009

science
A 2.7 kg box is released on a horizontal surface with an initial speed of 2.9 m/s. It moves on the surface with an acceleration of .27 m/s squared. Calculate the kinetic friction force on the box. The coefficent of the kinetic force is .156.
November 24, 2009

math
Over the past two weeks, Jane earned \$292 and \$193 respectively, at her part time job. What must she earn in the third week to bring her three-week average earnings to \$200 per week?
November 22, 2009

Science
What is it caled when... A family of unreactive elements whose atoms do not gain, lose, or share valence electron
November 19, 2009

world history
true or false if false why hindus believe that souls are born and reborn many times each time into a new body which is a process called reincarnation
November 19, 2009

history
Why were American political leaders so interested in the Pacific islands in the late 1800's?
November 16, 2009

the gcf can not be lower than 16
November 13, 2009

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