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December 21, 2014

Posts by help


Total # Posts: 966

Math 1
In audition for school play, 70% passed the quality of the jurors for the first week. of those remaining, 20% were chosen. if only 7 were qualified, how many tried their luck?
July 21, 2012

math
Please note, this is one section of the problem. I didn't feel the need to post the entire question as I understand how to do it...minus this one part. (2 tan pi/3) apparently becomes 2 sqrt 3.....explain?
July 15, 2012

Statistics
A local fire station receives an average of 0.5 rescue calls per day. Find the probability that on a randomly selected day, the fire station will receive fewer than two calls.
July 13, 2012

Reading
when you are purchasing auto insurance, your agem sex and marital status are considered together as your. A. claims history B. ratung territory C. driving record D. Driver classification I got B but it was WRONG
July 11, 2012

calculus
Can some explain how to do this problem? I tried using derivatives...but...I keep getting a different answer from what my teacher told me! A projectile is fired directly upward with an initial velocity of 144 ft/sec and its height (in feet) above the ground after t seconds is ...
July 7, 2012

math
A men's shoe store uses a markup rate of 115% on its most popular brands of shoes. If the shoe store buys a pair of popular-brand shoes for a wholesale price of $79, what will be the retail price of the shoes, to the nearest cent?
July 6, 2012

calculus
Andddd I just realized to take out the 3 out the 6 and 9 T_T opps. Thanks, now I feel dumb XD
July 5, 2012

calculus
I took out the 3x which gave me 3x(x+6-9) but if that's wrong...it's wrong :) thanks for the help!
July 5, 2012

calculus
hey I just wanted to make sure that I was doing this problem correctly. The question says to graph the function f given by f(x)=x^3+3x^2-9x-13 and find the local extremer. So here's what I did: f(x)=x^3+3x^2-9x-13 F^1(x)=3x^2+6x-9 = 3x(x-3) x=0 x=3 I put those two xes back...
July 5, 2012

Algebra 1
awesome.. I wasnt sure about the negative sign..:)
June 28, 2012

Algebra 1
can a base be negative at the same time as my exponent? how will you solve this one? -6 ^-3
June 28, 2012

Chemistry
Tube worms that survive near geothermal vents of hydrogen sulfide rely on bacteria living inside them to obtain energy by the oxidation of H2S to SO4^2-. What is the overall change in the oxidation number of sulfur for this reaction?
June 26, 2012

Algrebra 1
awesome thank you so much...! :)
June 26, 2012

Algebra
yes thank you!
June 26, 2012

Algebra
how to tell the difference between a negative number raised to a power and the opposite of a positive number raised to a power. Use examples in your explanation.
June 26, 2012

Essay
The supporting details
June 21, 2012

math
1-1/square root 3
June 15, 2012

math
I don't understand this question. I am suppose to be simplifying this: u^4-1/u^3-1 I put (u^2+1) (u+1)(u-1) for the top but the bottom, I can't figure out why my book put (u^2+u+1)(u-1) when it's only u^3...where did the extra u come from?
June 12, 2012

statistics
Which hypothesis-testing procedure would you use in the following situations? • The mean time an American family lives in a particular single-family dwelling is 11.8 years. A sample of 100 families in the Sycamore, OK area shows the mean time living in a single family ...
May 29, 2012

Calculus
factor fully: x^3 + x^2 - 7x + 2 give n that x=2 is a root
May 7, 2012

Politics
In Gandhi's account, the person practicing civil disobedience: Openly and civilly breaks an unjust law and quietly suffers the resulting penalty. Must refuse compliance with all of that society's laws for the sake of consistency. Is justified in retaliating against the...
April 30, 2012

child development
I understand...This lesson is just kicking my butt
April 24, 2012

child development
Oh okay sorry I just found this side and it is the first time using it but thanks for your help
April 24, 2012

child development
When both parents believe that men are capable of nurturing infants a. mothers devote time to caregiving b. fathers devote less time to caregiving c. fathers devote more time to caregiving d. the marital relationship tends to suffer, particulary when me spend little time in ...
April 24, 2012

math
what is the derivative of y=ln(x/4)
April 10, 2012

Identifying a Fallacies
I can't seem to figure out which fallcy this would be, is anyone familiar and could tell me which one for the following statement? 'To parents who think it's a good idea to share parenting, I say, "OK then, let the child stay in the house and you two swap ...
April 3, 2012

Critical Thinking
What kind of rhectorical or fallaci is this statement When religious conservatives enact laws to enforce the idea that their God abhors suicide, they threaten the central principle on which America was founded
April 2, 2012

URGENT Spanish help please.
thank you!
April 1, 2012

URGENT Spanish help please.
ok in the example it shows: ¿Comprendes espanol? Si, lo comprende ok for this question it's asking 1) do you and your siblings practice tennis my response: no, no los practicamos.. it said i was wrong how would I correct that 2) it asked does your mother teach ...
April 1, 2012

Trig
Solve the equation 2sin(2x) = cos x. and Solve the equation cos^2(2x)–sin^2(2x)= (√3 / 2).
April 1, 2012

Trig
Use the half-angle formulas to come up with an exact expression for each function value below. You do not have to simplify your answers. cos(pi/16)
April 1, 2012

trig
prove: cot^2(x)=cos(x)/(sinx)(tanx)
March 26, 2012

Derivatives
differentiate and simplify y= (e^x - 1) / x^2
March 25, 2012

math
I have solved the following questions, let me know if they are correct, thanks. 1. Simplify, and write in the base of 3: (9^x . 3^4x)^2 answer: 3^12x 2. Differentiate and simplify a. y= 3x^4 - 4e^x + 8 answer: 4(3x^3 - e^x) b. y= (3 + 4e^x)^5 answer: 20e^x (3+ 4ex)^4 c. y= (e^...
March 24, 2012

math-check
I have solved the following questions, let me know if they are correct, thanks. 1. Simplify, and write in the base of 3: (9^x . 3^4x)^2 answer: 3^12x 2. Differentiate and simplify a. y= 3x^4 - 4e^x + 8 answer: 4(3x^3 - e^x) b. y= (3 + 4e^x)^5 answer: 20e^x (3+ 4ex)^4 c. y= (e^...
March 24, 2012

American Literature
Describe the political role of the poetry of the 1950s? can anyone give a few pointers on this, thanks!
March 24, 2012

trig
Solve for theta, giving a general formula for all of the solution: tan(theta)=-1 sin(theta/2)=1/2
March 22, 2012

Trig
4sin^(2)x-3=0
March 21, 2012

physics
I got frequency: 2pi/√ 2 Period: √2/2pi
March 21, 2012

physics
What is the period and frequency of a 10-pound weight oscillating (as a pendulum) on a 5-meter-long rope?
March 21, 2012

physics
consider the following: A point on the tip of a tuning fork vibrates in harmonic motion described by the equation d=10sin(ωt). 1. ω for a tuning fork that has a frequency of 535 vibrations per second. (I don't understand this question) 2. How many cycles does the...
March 21, 2012

trig
Determine the least positive value of t for which d=0. d=cos((3pi/4)(t)) 0=cos((3pi/4)(t)) I got stuck on this step Please help
March 21, 2012

trig
Determine the least positive value of t for which d=0. d=cos((3pi/4)(t)) 0=cos((3pi/4)(t)) I got stuck on this step Please help
March 21, 2012

physics
A buoy oscillates in simple harmonic motion according to the motion of waves at sea. An observer notes that the buoy moves a total of 6 feet from its lowest point to its highest point. The buoy returns to its highest point every 15 seconds. Amplitude: 6 feet Period: ??? ...
March 21, 2012

physics
How do I find omega (ω)?
March 21, 2012

physics
Would I use cosine or sine?
March 21, 2012

physics
A buoy oscillates in simple harmonic motion according to the motion of waves at sea. An observer notes that the buoy moves a total of 6 feet from its lowest point to its highest point. The buoy returns to its highest point every 15 seconds. Amplitude: 6 feet Period: ??? ...
March 21, 2012

chemisrty
The molar heat capacity of silver is 25.35j/mol C . How much energy would it take to raise the temperature of 9.30 grams of silver by 12.0 C?
March 20, 2012

chemistry
when I work this out I get 5.7 g but it is saying that my answer is incorrect and I am not sure what I am doing wrong..
March 19, 2012

chemistry
A 32.2 g iron rod, initially at 22.3 C, is submerged into an unknown mass of water at 63.9 C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 58.6 C. What is the mass of the water?
March 19, 2012

physics!!!
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), whereas its index of refraction is 1.530 at a wavelength of 410 nm (violet). If both wavelengths are incident on a slab of crown glass at the same angle of incidence, 1.1°, what is the angle ...
March 19, 2012

Ms.Sue
MsSue can you give me a general analysis of what Kalamazoo Poverty Reduction Initiative is about and how they're beneficial. I've read the site and not comprehending it.
March 18, 2012

American Literature
Hey! Can anyone give a good suggestion on a research topic.
March 16, 2012

Ms.Sue
I've changed my persuasive topic from Water cons. to Poverty in Kalamazoo. Do you know of any organizations that help the poverty in Kalamazoo? So far I've only found Loaves and Fishes.
March 16, 2012

Calculus
Q. Find the minimum value of Q=x^2y subject to the constraint 2x^2+4xy=294. Its the derivative method.
March 15, 2012

help!
Are ways to prevent oil leakage in Kalamazoo?
March 12, 2012

MsSue Please
well it's a speech not writing
March 12, 2012

MsSue Please
I'm the guy doing the persuasive speak on the Oil leakage in the Kalamazoo river. I can see you're from/know of this area. Can you give me some pointers/idea's of what I could talk about/include in my persuasive speech. I've been doing a little reading of how ...
March 12, 2012

calculus
The efficiency of an internal combustion engine is given by E= (1-v/V)^0.4 Where V and v are the respective maximum and minimum volumes of air in each cylinder. a) Show that ∂E/ ∂V > 0 and interpret your result b) Show that ∂E/ ∂v < 0 and ...
March 11, 2012

Math ?
If p is a positive  integer and is greater than 3. How many prime integers are there in 3p including 1 and 3p
March 10, 2012

Math ?
If p is a positive  integer and is greater than 3. How many prime integers are there in 3p including 1 and 3p
March 10, 2012

MsSue
you helped me last week on finding a persuasive topic for on issues of Kalamazoo. I chose Water Conservation.. Do you know any handy news articles that would be of help that are 2009 and greater? Thanks In Advance
March 9, 2012

geometry
h = 16, k = 4, a = 4.) k = 3, a = 9, h = __________ 5.) a = , h = 5, k = ___________ 6.) h = 4, k = 1, n = ___________ 7.) h = 9, k = 6, m = ___________ 8.) n = , h = 5, p = ____________, k = __________
March 9, 2012

American Literature
Would you describe Langston Hughes’s poetry as modernist in its themes, use of images, and style? Refer to specific examples from Hughes’s poetry to support your answer.
March 8, 2012

American Literature
Explain the meaning of one example of Cather's use of animals to describe human behavior.
March 7, 2012

American Literature
What is significant about the novel's title, My Antonia?
March 7, 2012

voc 8
is it teacher
March 7, 2012

Geometry
isaac is landscaping a yard , to see how well a tree shades are area of the yard. He needs to know the trees height . The trees shadow is 18 feet long at the same time isaacs shadow is 4 feet long if isaacs is 6 feet tall how tall is the tree
March 6, 2012

Trig
Please help. I can't get this problem at all. When two bubbles cling together in midair their common surface is part of a sphere whose center D lies on the line passing through the centers of the bubble. Also, angles ACB and ACD are 60 degrees. Show that the radius r of ...
March 5, 2012

math
Suppose the space needle in seattle washington casts a 220 ft shadow at the same time a nearby tourist cast a 2- foot shadow if the tourist is 5.5 feet tall how tall is the space needle
March 5, 2012

Calculus
A sporting goods store sells 100 pool tables per year. It costs $20 to store one pool table for a year, based on the average inventory on hand. It costs $40 for each delivery of pool tables. How many times per year and in what lot size should the store order pool tables to ...
March 4, 2012

Persuasive topics.
What are some issues in Kalamazoo, Michigan that I can do a persuasive speech on. Issues that are 2010 or greater?
February 28, 2012

Physics!!!
A 24-V battery is connected in series with a resistor and an inductor, with R = 5.6 Ω and L = 2.0 H, respectively. (a) Find the energy stored in the inductor when the current reaches its maximum value. (b) Find the energy stored in the inductor one time constant after the...
February 27, 2012

Chemistry
A solution is prepared by adding 50ml of .05 M HCl to 150 ml of .10 M HNO3. Calculate the concentrations of all species in this solution.
February 27, 2012

math
Complete the table for this question y=-1/2x+3 the table is x y 0 -2 -4 2 0
February 27, 2012

PHYS›CS
At the end of the spring term, a high school physics class celebrates by shooting a bundle of exam papers into the town landfill with a homemade catapult. They aim for a point that is 31.1 m away and at the same height from which the catapult releases the bundle. The initial ...
February 27, 2012

physics
A uniform ladder 10.0 m long is leaning against a frictionless wall at an angle of 60.0° above the horizontal. The weight of the ladder is 18.4 lb. A 60.8-lb boy climbs 4.18 m up the ladder. What is the magnitude of the frictional force exerted on the ladder by the floor?
February 27, 2012

American Literature
According to Langston Hughes in "The Negro Artist and the Racial Mountain, what is the "mountain standing in the way of any true Negro art in America"?
February 25, 2012

physics!!!
To monitor the breathing of a hospital patient, a thin belt is girded around the patient's chest . The belt is a 215-turn coil. When the patient inhales, the area encircled by the coil increases by 41.0 cm2. The magnitude of Earth's magnetic field is 50.0 µT and ...
February 25, 2012

Chemistry
I got it, thanks!
February 23, 2012

Chemistry
An atmospheric scientist interested in how NO is converted into NO2 in urban atmospheres carries out two experiments to measure the rate of this reaction. The data are tabulated below. A: [NO]0 = 9.63 × 10-3 M, [O2]0 = 4.1 × 10-4 M t(s) 0/3.0/6.0/9.0/12.0 [O2] 4.1/...
February 23, 2012

Calculus
Find an equation (in terms of x and y) of the tangent line to the curve r=3sin(5theta) at theta=pi/3
February 21, 2012

Calculus
Thank you!
February 20, 2012

Calculus
Sand is poured onto a level piece of ground at the rate of 0.25 m^3/min and forms a conical pile whose height is equal to its base diameter. How fast is the height increasing at the instant when the height is 0.50 m? V = 1/3(pi)(r^2)h I got 3/pie, is that correct?
February 20, 2012

American Literature
Based on "To Whistler, American," how does Pound view the role of American art and literature?
February 18, 2012

American Literature
least published, like whose work wasn't published that much, or didn't write that much compared to the others.
February 18, 2012

American Literature
Of Fitzgerald, Hemingway, Pound, and Stein, who was the least published writer? I have no clue about it
February 18, 2012

Politics
no, i think it is false
February 17, 2012

Politics
true
February 17, 2012

Politics
At the national level, America is best described as having a direct democracy system of government. True or false
February 17, 2012

Politics
Q. The words “wall of separation between church and state” appear in the Constitution. a. true b. false
February 17, 2012

math
thanks guys!
February 16, 2012

math
solve for x: -3x^2+6x-3=0
February 16, 2012

Algebra 2
log100^x
February 6, 2012

PreCalculas
Can someone tell me what the graph of r=cos (5/2 x angle) should look like?
February 2, 2012

physics!!!
Two capacitors, C1 = 27.0 µF and C2 = 35.0 µF, are connected in series, and a 21.0 V battery is connected across them. (a) Find the equivalent capacitance, and the energy contained in this equivalent capacitor. equivalent capacitance= µF total energy stored...
January 27, 2012

math
Kelly opened a savings account with $500 she received at 8th grade graduation four years ago. The account pays 2.5 percent compounded daily. How much should be in the account now?
January 25, 2012

math
How much money would you have in a savings account at the end of one year, if you saved $1000 at two percent interest compounded quarterly? Round to the nearest dollar
January 25, 2012

math
Michelle put $2000 in a savings account at 1.75 percent interest. She kept it there for eight years. How much interest did she earn?
January 25, 2012

math
Orlando has a bank statement balance of $414.25 and $5.90 service charge. His check register shows $374.16 and he has two outstanding checks of $26.54 and $21.78. What is his true balance?
January 25, 2012

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