Friday
July 25, 2014

Posts by James


Total # Posts: 1,832

Math
Can someone please help me? certain medical diagnostic test is used to determine if people have pinkyitis and it is known that 1 in 1300 Americans has the disease. The test correctly diagnoses the presence of pinkyitis 97% of the time and it correctly diagnoses the absence of ...

Math
Volunteers working to raise funds for a new community library sold 1000 raffle tickets at $10 each. Tickets are to be randomly drawn and prizes are awarded as follows: one prize of $1,000, twenty prizes of $50 and one hundred prizes of $20. What is the expected value of this r...

College Math
Volunteers working to raise funds for a new community library sold 1000 raffle tickets at $10 each. Tickets are to be randomly drawn and prizes are awarded as follows: one prize of $1,000, twenty prizes of $50 and one hundred prizes of $20. What is the expected value of this r...

Statistics
2.376

Statistics
2.376

healthcare commumication
What are the advantages and disadvantages of using traditional, electronic, and social media for health care communication What are the effects of HIPAA and other regulations on the use of these media for health care communication

Chemistry
The binding energy of electrons in a metal is 194 kJ/mol. Find the threshold frequency of the metal. ----------------- The heat of fusion of ice is 6.00 kJ/mol. Find the number of photons of wavelength = 6.78×10^−6 m that must be absorbed to melt 6.80 g of ice.

Calculus
Find an antiderivative of q(t)=(t+8)^5

finance
The Ault Company made a credit sale of $15,000. The invoice was sent today with the terms, 3/15 net 60. This customer normally pays at the net date. If your opportunity cost of funds is 9% the expected payment is worth how much today?

physics
A model airplane of mass 1.5 kg is attached to a horizontal string and flies in a horizontal circle of radius 5.8 m, making 2 revolutions every 8 s. (The weight of the plane is balanced by the upward “lift” force of the air on the wings of the plane.) The accel...

physics
An athlete swings a 3.06 kg ball horizontally on the end of a rope. The ball moves in a circle of radius 0.82 m at an angular speed of 0.25 rev/s. What is the tangential speed of the ball? Answer in units of m/s

Math
What is the truth table for p v ( q arrow going straight across p )

Calculus
Find the area between y=e^-x and y=4(x-x^2.

Physical Sci
John used a force of 300 N to push his younger brother in a wagon for 50m. How much work did John do?

statistics
fhj

Chemisty 20
A sample of water was known to contain chloride ions. To determine the concentration of chloride ions in the water sample, a student added a solution of silver nitrate to 500mL of the water. 1.26g of silver chloride percipitate formed. What was the concentration of chloride io...

Calculus
The velocity of a particle moving along the x-axis is given by f(t)=6-2t cm/sec. Use a graph of f(t)to find the exact change in position of the particle from time t=0 to t=4 seconds.

physics
an object accelerates at 0.8m/s2 when a resultant force of 200n is acting on it what is the mass of the object

Calculus
Find an equation of the tangent line to the curve for the given value of t. x=t^2-2t, y=t^2+2t when t=1

physics RC
wow thank you! book was fairly vague on this subject

physics RC
The potential difference between the plates of a leaky capacitor, C = 3.00 microfarads., drops from 6.80 V. to 3.40 V. in 1.00 s. What is the equivalent resistance (in ohms) between the capacitor plates?

math
what is 11/15 - 7/20

fractions from least to greatest
8/7,5/7,3/7,1,7,4/7

Calc 2
Can someone help me with this one?

Calc 2
Can someone help me with this one?

Calc 2
Is the series convergent or divergent? n=1 series to infinity (-1)^n * (sqrt(n)/(4+5sqrt(n)) Does this diverge?

Calc 2
Does 3/4 - 3/5 + 3/6 - 3/7 + 3/8.... Converge or Diverge?

Calculus 2
i know that the ratio test is used to figure it out. you first find the limits right?

Calculus 2
Find the radius of convergence and interval of convergence of the series. n=2 series to infinity (-1)^n * x^n+6/n+7 R= ? I= (or[ , ]or) How do i do this?? ( means convergent and [ means divergent.

Math
A frictionless spring with a 7-kg mass can be held stretched 1 meters beyond its natural length by a force of 20 newtons. If the spring begins at its spring-mass equilibrium position, but a push gives it an initial velocity of 0.5 m/sec, find the position of the mass after sec...

Calc 2
This is how it looks: hopefully this clarifies it a bit. n^n/(4)^1+3*n

Calc 2
How would I do this one? n=1 to infinity n^n/4^1+3*n Does it absolutely converge, conditionally converge, or diverge? What would I do here?

Calculus 2
thanks!

Calculus 2
Sorry it's *(-5)^n and I don't think its absolutely convergent, am I correct?

Calculus 2
n=1 series to infinity (-5^n)/n^3 does it absolutely converge, diverge or conditionally converge. Would I be applying the ratio test?

math
whats the angle of one end of a 13 ft.by2 by 4 ,,2ft.high and other end level?

Computer Science
Question #1. 1. Say that L is regular over 0, 1. Is the set, {x|x = 0y,y ∈L } also regular? 2. For two regular languages (a) Is M*L=L*M for any alphabet? (b) Is it true if the alphabet is only {0,1}? (c) Is it true if the alphabet is only {0}? 3. If L is regular, is the ...

Physics
You dont have to give me the answer but explaining a way to get there would help

Physics
As part of a physics experiment, you stand on a bathroom scale in an elevator. Though your normal weight is 690 N, the scale at the moment reads 588 N. (a) Is the acceleration of the elevator upward, downward, or zero? (b) Calculate the magnitude of the elevator's accelera...

Physics
h=1.5 d=2

Math
How do you round 0.0694 to the greatest place?

Algebra
A clothing company makes two basic products- shirts and pants. The company has 50 labor hours per day in the cutting department and 70 hours available in the sewing department. It takes 12 minutes to cut a shirt and 15 minutes to sew it. It takes 13 minutes to cut pants and 18...

college math
two bakeries produce three types of cookies, chocolate chip, sugar, and peanut butter. the cookies are produced in batches containing some of each type of cookie. the cooks will not break up a batch, so you must buy an entire batch of cookies if you want any cookies. mrs. bett...

algebra
two bakeries produce three types of cookies, chocolate chip, sugar, and peanut butter. the cookies are produced in batches containing some of each type of cookie. the cooks will not break up a batch, so you must buy an entire batch of cookies if you want any cookies. mrs. bett...

Calculus 2
The question is: n=0 E to infinity 4+sin(n)/3^n Does it converge or diverge? i'm doing this hw problem and I believe it converges according to other example? Is this the case?

Calculus 2
Does Series n=1 to infinity 1/2n+1 converge or diverge? I'm thinking it converges, because p would be < 1 right? I'm a little confused.

english
klnlfn

Physics
Just got the answer a little bit ago. Treat it as a roller coaster question. It's work conservation so the total work done by gravity is the total work in the system. This causes the sphere to move forward as well as to rotate. By playing around with the kinetic and rotati...

physics
If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h?

physics
If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h?

physics
If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h?

math
both are correct, just use a claculator

Physical Science
A block of ice at 0^\circ {\rm C} is dropped from a height that causes it to completely melt upon impact. Assume that there is no air resistance and that all the energy goes into melting the ice. What is the height necessary for this to occur.

Calculus
I got the dz/dy derivative to be: cos(x-y)/sin(x-y) I got the d^2z/dydx derivative to be: -(sin(x-y))^2 - (cos(x-y))^2/ (sin(x-y))^4

Calculus
Find the d^3z/dydx^2 partial derivative of: ln[sin(x-y)] The answer is supposed to be 1/2; however, I cannot figure out how to get this answer. Any help is appreciated.

English
My prompt is: Explain, in an essay with a thesis, why student papers must be relevant and how that relevance is achieved in their writing. (The requirements of this essay include why and how. Address both in the thesis) I'm pretty sure I need to address rhetorical stance i...

statistics
A researcher wants to study the spending habits of customers of a local shopping mall. The mall manager claims that the average spending per customer is $70, but the researcher believes that the average is less than $70. A simple random sample of 350 shoppers is obtained. The ...

multplication
When multiplying is there a rule stating that the numbers being multiplied can't have the same two last numbers as the product or the numbers can't end with the same numbers that were multiplied?

Pre-calc
Use the given zero to find the remaining zeros of the function: h(x)=x^4-15x^3+55x^2+155x-1476 Zero:5-4i I multiplied [x-(5-4i)][x-(5+4i)] and got x^2-10x+9. The example I have says to divide that by h and get a second quadratic equation that is also a factor of h. I have to u...

Trig.
Never mind, I figured it out.

Trig.
I'm trouble solving for theta. Any help is appreciated. 0.73377324 = sin(theta)/cos(theta)

Chem
Balance the following redox reactions in acidic solution by the half-reaction method Br–(aq) + I–(aq) + HClO(aq) = Br2(l) + IO3 + Cl–(aq)

Physics
A 1830-kg car is traveling with a speed of 19.8 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 63.1 m? Not sure about the equation to use for this queation.

history
c

Math
what is the future value of $8000 a year for 28 years at 7.5%

Calculus
Find the absolute maximum and minimum vales of the set D. F(x,y) = x^2 + y^2 - 2x, D is the closed triangular region with vertices (2,0), (0,2), and (0,-2). I know that I have to find Fx(x,y) and Fy(x,y) but I'm not sure where to go from there. Any help is appreciated. Fx(...

Computer Science
Where can I find college grants and scholarships for men 2 deviations below standard in height?

Algebra
To keep his basketball team hydrated, Daniel mixes a powdered sports drink with cold water. For best taste the mix should be 96% water. If Danial has used 16 scoops of powder and added two quarts of water, how many gallons of water should he add, given than each scoop is 1/4 o...

Trigonometry
I need help on both of these... Find the exact value of cotx if the terminal side of angle x contains the point (-5,-12). Find the exact value of secx for angle x that has a terminal side containing the point (-1,squareroot3)

Trigonometry
Express 3 rad in degree measure and approximate to four significant digits

physics
A ball is thrown straight up with an initial speed of 30 m/s. How high does it go? Assume the acceleration of gravity is 10 m/s 2 . Answer in units of m

Math
if its linear, its a straight line. If its a quadratic, it looks like either a hill or a valley. It makes an arc. If its exponential, its a curve

Calculus
Never mind. I figured it out. L(x,y) = f(2,5) + fx(2,5)(x-2) + fy(2,5)(y-5) L(x,y) = 6 + 1(x-2) - 1(y-5) = 6+x-2-y+5 = x-y+9 L(2.2,4.9) = 2.2-4.9+9=6.3

Calculus
Given that f is a differentiable function with f(2,5) = 6, fx(2,5) = 1, and fy(2,5) = -1, use a linear approximation to estimate f(2.2,4.9). The answer is supposed to be 6.3. Here's what I've done so far: L(x,y) = f(2,5) + fx(2,5)(x) + fy(2,5)(y) L(x,y) = 6 + x - y L(2...

Physics
particle A moves along the line y = 30m with a constant velocity of magnitude 3.5 m/s and parallel to the x axis. At the instant particle A passes the y axis, particle B leaves the origin with 0 initial speed and constant acceleration of magnitude 0.50 m/s2. What angle θ ...

Philosophy
How might Hobbes argue that from the time of reformation (1517), with decline in the power of the pope, to WW1 no sufficient structure existed to support the Just War Theory?

Quantum Physics
They didn't say.. They just asked for the energy level that will emit a photon in an infrared region

Quantum Physics
An electron drop to what energy level is likely to emit a photon in the infrared region?

physics
two stones with initial speeds of 13 m/s and are thrown at an angle 30 degrees, one below the horizontal and one above the horizontal. What is the distance between the points where the stones strike the ground?

physics
two stones with initial speeds of 13 m/s and are thrown at an angle 30 degrees, one below the horizontal and one above the horizontal. What is the distance between the points where the stones strike the ground?

physics
two stones with initial speeds of 13 m/s and are thrown at an angle 30 degrees, one below the horizontal and one above the horizontal. What is the distance between the points where the stones strike the ground?

understanding observation behavior
Which of the following method depends on heavily on the observers memory.

assessing development cognitive language observat
There are several strategies that can help preschool children Foster language production one strategy that involves asking questions after a child. speaks to encourage him or her to continue talking is called?

assessing development cognitive language observat
When preschool child is first learning to print. alphabet letters he or she print letters upside down or backwards the teacher should.

Physics
A woman driving at a speed of 23 m/s sees a deer on the road ahead and applies the brakes when she is 210 m from the deer. If the deer does not move and the car stops right before it hits the deer, what is the acceleration provided by the car's brakes?

math
is 25 the answer?

math
please answer my question i really need help

math
So i should do 30/6=5 5*5=25

math
30 30 30 30 okay now what?

math
cause i need five squares to cover a aquare with a side length of 30 inches without over lappigng but i am really confused

math
i did 30 divided by 5 and i got six

math
2?

math
how many squares with sides that are 6 inches long and needed to cover a aquare with a side length of 30 inches without over lappigng i put 1 am i correct?

math
no because 548 rounded to the nearest 10 is 550, this 550-130 is 420

hands on variables
n+2x10 when n=5

math
how many boxes can 372 be equally divided into?

mathematics
given that (the square root)1,225 = 35, evauluate 250(to second power)

math
um thanks

math
thank you and one more question, what is a trick i can apply when i am asked to find the cube root of something? i am taking a test on friday and i want to know so i can get a good grade on it.

math
what is the cube root of 9,261?

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