Friday
December 9, 2016

Posts by annie

Total # Posts: 801

Calculus AB
Please help me with this WS 1) Find the value of lim as x-->-(square root of 3) of (-x^4 + 5x^2 -6)/(x+(square root of 3) 2) Find the distance between the discontinuities of g(x)= ((square root of x-4))/(x^2 -5x -1) 3)Find the value of x at which the curve y=(x^2 - 4)/(x^5...
November 30, 2016

chemistry
Write a balanced equation for the reaction of liquid bromine with chlorine gas.
November 29, 2016

Calculus AB
Thank you so much! And I will
November 25, 2016

Calculus AB
Could someone please help me with these tangent line problems? 1) Find the equation of the line tangent to the given curve at the indicated point: 3y^3 + 2x^2 = 5 at a point in the first quadrant where y=1. 2) Show that there is no point on the graph of x^2 - 3xy + y^2 = 1 ...
November 25, 2016

science
a body of mass 10kg is moved in a vertical circle calculate tangential acceleration
November 11, 2016

Chemistry
Write mathematical equations that show how you will calculate the detected activity from the count rate due to background radiation and the sample of KCl and how you will determine the “true” activity of your sample from the detected activity. Use the following ...
November 10, 2016

Calculus AB
Thank you so much :)
November 9, 2016

Calculus AB
I'm not sure how to go about this problem: Find the equation of the line tangent to the curve x^2 + 2xy + y^3 = 4 at y=1 in the 1st quadrant.
November 9, 2016

Calculus AB
There's these two word problems I don't understand. 1. A man 6 ft tall walks at a rate of 5 ft per second toward a streetlight that is 30 feet high. The man's 3-foot-tall child follows at the same speed, but 10 feet behind the man. a) Suppose the man is 90 feet ...
November 8, 2016

Chemistry
To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 18.5 g, and its initial temperature is -13.3 °C. The water resulting from the melted ice reaches the temperature of your skin, 28.4 °C. How much heat is ...
November 4, 2016

English Lit
1. What pattern or structure is there to the development the the plot? Describe the way the events are organized. Is the structure significant to the meaning? "Car Crash While Hitchhiking" -Denis Johnson
November 2, 2016

Calculus AB
Thank you so much! These were the hardest out of the 53 problems.
October 30, 2016

Calculus AB
Um I don't really understand these word problems so could someone help me please? 1) An object is thrown upward with an initial velocity of 5 m/s from an initial height of 40 m. Find the velocity of the object when it hits the ground. Assume that the acceleration of ...
October 30, 2016

Calculus AB
Thank you so much. I kind of understand the chain rule and product rule, but it's always hard for me to determine how to do/use them.
October 30, 2016

Calculus AB
Sorry but I've got a lot of problems that I don't understand. 1) Let f(x)= (3x-1)e^x. For which value of x is the slope of the tangent line to f positive? Negative? Zero? 2) Find an equation of the tangent line to the oven curve at the specified point. Sketch the curve...
October 30, 2016

Calculus AB
OH okay thank you so much!
October 30, 2016

Calculus AB
Could someone please help me with this? Calculate the instantaneous rate of change of f <note: f(x)=(x-6)/(x+6)> at x=6.
October 30, 2016

Chemistry
Thank you so much! I understand now.
October 28, 2016

Chemistry
Please write down the redox reactions (using the half-reaction method!) a)Cl2 from OCl- and Cl- in acidic solution b)Br2 from BrO3- and Br- in acidic solution -You don't have to do both, but could you help me step up the half reactions especially for OCl- --> Cl2
October 28, 2016

Algebra
solve for the negative value of x: I know if you solve for a positive value, the answer for x=13; but how to get the negative value. |2x-8|=18
October 23, 2016

math
a recipe for fudge brownies calls for 3 5/8 cups of cocoa per bath. if you are making 2 1/2 batches, how many cups are needed?
October 18, 2016

Science
Mom: circle (C) Dad: oval (c)
October 14, 2016

Science
Mom:Circke face Dad: Oval face Son: ? what's the son genotype & phenotype? may someone give me an example and help me under this question, please.
October 14, 2016

math
Of 45 students 30 play badminton and 26 play tennis. Each student play either badminton or tennis,determine how many students play:(a)badminton only (b) tennis only
September 30, 2016

Math
How many fl oz would go pinto 6.5
September 28, 2016

Calculus AB
Please help I'm stuck on this problem for the past hour. Define f(x)= { Ln lx-1l }/x A) show that f(c) is continuous at x=2 B)Where on the interval [-2,2] is f discontinuous? Show the work that leads to your conclusion. C) classify the discontinuities in part b) as ...
September 15, 2016

Social Studies
Oh wait it's D.
September 8, 2016

Social Studies
Which of the following was the provision in the Treaty of Paris in 1763? a. All French land in North America was to be given to England b. All French land in North America was to be given to Spain c. All French lands west of the Mississippi and Louisiana were to be given to ...
September 8, 2016

geography
shopping malls interstate highway system oil deposits
September 8, 2016

Language Arts
Which of the following topics would be most appropriate for an autobiography narrative? A. your opinion of the opening ceremony at the Olympic Games B. your explanation of how to download MP3 files to your personal musical device C. your account of your audition for a ...
September 7, 2016

AP Biology
Not to be rude, but none of them answer my question for the phenotypes of the cusimanse, or it's body structure and function from out and within.
August 6, 2016

AP Biology
What are the phenotypes of the long-nosed cusimanse? I can't find any site about their body structure or function either.
August 6, 2016

Chemistry
If you are asked to make exactly 1.0 Liter of 0.80 M ZnCl2 solution, how many grams of zinc chloride would you need to be massed out? How do I go about solving this problem?
July 13, 2016

English
Read the following poem and then respond to the question below: “I’m Nobody! Who are you?” By Emily Dickinson I’m Nobody! Who are you? Are you – Nobody – too? Then there’s a pair of us! Don’t tell! they’d advertise – you know! ...
June 7, 2016

Psychological
hello
May 30, 2016

Psychological
Which of the following statements regarding the nature of stress is true? A. Accumulating hassles may well lead to a sudden onset of PTSD. B. Psychophysiological disorders are primarily mental disorders. C. Continued exposure to stress is associated with the secretion of ...
May 30, 2016

Math
For questions 3 and 4, simplify each expression. 1. 4^4/4^6 -16 16 1/16 <----------------- -1/16 2. 5^0 0 <------------- 5 1 –5
May 30, 2016

Math
Write each expression using a single exponent 1. x^9/x^2 a)x^11 b)x^7 <-------------- c)7 d)x^5 2. h^14/h^5 a)h^-9 b)1/h^9 c)h^19 d)h^9 <-----------------
May 30, 2016

physics
An insulated beaker contains 300g of water initially at 30 degree celsius. water at 100 degree celsius is added until the temperature of mixture reaches 50 degree celsius . the specific heat capacity of water is 4.2J/(kg degree celsius). how much water is added?
May 22, 2016

Algebra
A chemist mixed a 70% alcohol solution with a 30% alcohol solution to make a 45% alcohol solution. How many liters of each were used to make 120 L of a 45% solution? I tried solving this with elimination method and made two separate equations. For instance, x+y = 120(.45) .70x...
May 20, 2016

Math Help- Areas!!!!
THANK YOU STEVE!!!!!!
May 19, 2016

Math Help- Areas!!!!
For problems 4-5, find the surface area of the cylinder in terms of pi. (cylinder is 18 cm high and 14 cm wide) A. 350 pi cm2 B. 896 pi cm2 C. 602 cm2 D. 644 pi cm2***? (cylinder is 20 inches high and 18 inches wide) A. 396 pi in2 B. 522 pi in2 C. 360 pi in2****? D. 1008 pi ...
May 19, 2016

Trigonometry and Right Triangles!
Thank you Steve!
May 8, 2016

Trigonometry and Right Triangles!
The length of the hypotenuse of a 30 60 90 triangle is 16. What is the perimeter? I'm just learning about this. Can someone explain?
May 8, 2016

Math Help!!!
How do I solve for sin24=CD/BC if BC is 15,052.07464? Thanks!
May 7, 2016

physics
on the road with Kate. If she is driving a 2500kg car going 75km/h a)how much kinetic energy will it process. b)She asks "How high would I have to lift the car for the same amount of potential energy"? converting 75km/h to m/s
May 4, 2016

physics
and I dividing the f/x or do I multiply
May 4, 2016

physics
F=24.9N?
May 4, 2016

science
The cohrence length of a light source is 2.45×10raise to power-2 calculate width of spectral line
April 22, 2016

science
write down the possible terms of one electron system corresponding to n=2
April 22, 2016

science
find the energy of first excited state of helium
April 22, 2016

math
Write the following sets in set. Builder notation. B is the set of even natural numbers greater than 15 and smaller than 29
April 17, 2016

Please help me out
What Ring size would an 48 year old wear? I'm trying to find a gift for my boyfriend . he is 48, but I don't know what is his size . I don't have time to get his finger measured by a pro but maybe I can? Please don't Respond with just go to a jeweler. Also do ...
March 31, 2016

Geometry
(x)(x+10)=1200
March 31, 2016

history
The Ming dynasty emperors were members of the Zhu family. .... Hong Wu did continue to conduct limited trade with merchants for ... the fault of the eunuchs— also contributed to the decline of the Ming Dynasty. .... They were able to enlist Ming government officials and ...
March 30, 2016

Math
IDk
February 17, 2016

Math
Wendy's savings to Stef's savings were 5:6. After they spent $28 each, then the ratio became 1:4. A) Find Wendy's saving before spent $28. B) What's Stef's saving after spent $28.
January 27, 2016

Physics
A shaft is turning at 71.6rad/s at time zero. Thereafter, its angular acceleration is given by α = –10.8rad/s2 – 4.42 t rad/s3 where t is the elapsed time. Calculate its angular speed at t = 2.73s. and How far does it turn in these 2.73s
January 26, 2016

Math/ algebra
Cheryl decided to create a flower bed in front of her house. One half of her flower bed is planted with pink tulips. She plants three-quarters of the rest of the ground with purple iris. After that she plants one half of what remains with orange marigolds. The rest of the ...
January 17, 2016

World Civilizations
my little girl name is destiny
January 2, 2016

World Civilizations
I'm trying to help my little girl but i really don't understand this stuffs at all if you can please help my little girl out here is her email address at please i give up on helping her out
January 2, 2016

World Civilizations
i really do understand this still its getting me upset :(
January 2, 2016

World Civilizations
Thank You for your help
January 2, 2016

World Civilizations
Why did northern European powers enter the competition for the New World land and resources in the 17th century? need help please
January 2, 2016

Trig
Could you explain the (50-v/2)^2 + 3/4v^2 = 100^2 part? I'm a little confused.
December 7, 2015

Trig
In still air, an airplane is flying at 100 mph. It encounters a wind blowing toward the west at 50 mph. What should be the plane's compass heading for its course to be N30ºW?
December 7, 2015

Science
Thank You
November 12, 2015

Science
If you were creating a lamp by hand what type of material would you chose for the wiring and what material would you chose to coat the wiring? Why?
November 12, 2015

Science
Thank You
November 12, 2015

Science
What must happen to the electrons in a material to create an electric current?
November 12, 2015

Science
An electric fence displays a warning sign about the voltage and amperage of the fence. How would amperage and voltage affect the power of the fence?
November 12, 2015

Math
Write the following equation in slope intercept form 3x + 4y = 12
November 10, 2015

Math
2. Find the slope of (3, 4) (6, -2)
November 10, 2015

Math
1. What is the domain and range for these two ordered pairs? (3, 4) (6, -2) Domain and Range.
November 10, 2015

Physics
An experimental model rocket has a mass of 0.054kg. The fuel that was used in one test had 215J of chemical potential energy. When the rocket reached an altitude of 119m, it was travelling at 48m/s and still rising. With what efficiency did the rocket convert chemical ...
November 9, 2015

Math algebra 2
Identify the vertex the axis of symmetry,the maximum, or minimum value and the range of each parabola Y=x^2-4x+1
November 2, 2015

Math
A man walks 3 miles due east, then 4 miles due north, then five miles due east. How far is he from his starting point?
October 25, 2015

math
Casey got 94 got of the 100 questions answered correctly how many percent of the questions did she answer correctly
October 21, 2015

algebra
Hi! Have a good day.
October 19, 2015

present participle or past participle
1. the baking bread looked delicious. 2. devoted soccer fans are looking forward to the season. 3. frozen blue berries are his favourite desert. 4. walking slowly the dog stretched his legs. 5. examined by a doctor, his wound will heal soon
October 12, 2015

present and past perticiple
The lion basking in the sun looked sleepy
October 12, 2015

English
I need a real life example of something that illustrates these qualities from "How to Read Literature Like a Professor?" by Thomas C. Foster I am doing a chapter from the book called Nice to Eat You: Acts of Vampires Basically this is what I got from the chapter : 1....
October 9, 2015

English
I need help for "How to Read Literature Like a Professor?" by Thomas C. Foster I am doing a chapter from the book called Nice to Eat You: Acts of Vampires Basically this is what I got from the chapter : 1.Literal Vampirism: Nasty old man, attractive but evil, ...
October 8, 2015

Chemistry
Suppose density of 100.0 mL of some liquid was found to be 0.789 g/mL. What would be the specific gravity of 20.0 mL of this liquid?
September 29, 2015

English
I need help making a synthesis analysis of Jonathan Swifts "A Modest Proposal". I don't know what to say or write about. I'm really bad at making synthesis. Please help me
September 17, 2015

Physics
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0854 s, during which time it experiences an acceleration of 217 m/s2. The ball is launched at an angle of 58.3° above the ground. Determine the (a) horizontal ...
September 9, 2015

PreCalc
what angle in rqadians correspond to 3 rotations around the unit cvircle
September 8, 2015

Chem
Why doesn't tobbaco smoke in bloodstream kill you? (Molecular explanation)
August 20, 2015

computer
2.C 14.B 17.D
August 10, 2015

computer
2010 to 2013
August 10, 2015

computer
1. Default tab stops are set in Word every _______ inch. A. 1 B. 1/2 C. 1/4 D. 3/4 2. Once you've saved a block of text or graphics for easy insertion in other documents, you'll see it in the _______ gallery. A. Photo Space B. ClipArt C. Multimedia Online D. Quick ...
August 10, 2015

Chemistry
Consider the reaction: 2Mg + O2 ------> 2MgO The reaction is at equilibrium, the concentration of MgO is found to be 0.5. What is the concentration of Mg and O2? ------------------------------------------------------- Keq is not given... using the ICE table, I ended up with...
June 29, 2015

Chemistry
Consider the reaction: 2Mg + O2 ------> 2MgO The reaction is at equilibrium, the concentration of MgO is found to be 0.5. What is the concentration of Mg and O2? ------------------------------------------------------- Keq is not given... using the ICE table, I ended up with...
June 29, 2015

Art History
What are the main differences between Cycladic and typical Mycenaean art?
June 7, 2015

Math
Class of 20 students, 13 play soccer, 8 play tennis and 2 play neither. Find how many students a) Play soccer or tennis b) Play both soccer and tennis c) Play only soccer
May 27, 2015

Chemistry
What is the concentration of acid or base remaining after reaction if 21 ml of 0.54 M sulfuric acid is mixed with 39 milliliters of 0.12 M sodium hydroxide?
May 19, 2015

chemistry
which one is at room temperature then ?
March 19, 2015

chemistry
LiF, BeF2, PCl3, CCl4, F2 1. which is likely to conduct electricity when aqueous: 2. which is most likely to be a gas in room temp. 3. which is likely to be very soluble in water 4. which is a polar molecule? may have more than one answer
March 19, 2015

Calculus
Nevermind, solved it!
March 17, 2015

Calculus
1.) Consider the graphs x+5y=17 and x+7=y^2 where a=7 b=2 c=57 f(x) = ? g(x) = ? I have solved for a,b, and c but I can't figure out f(x) and g(x) For f(x) I thought it was (17-x)/5 but it's not the correct answer. For g(x) I thought it was the sqrt(x+7) but it's ...
March 17, 2015

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