Monday
December 5, 2016

Posts by alex

Total # Posts: 3,582

Math
The volume of a sphere is given by the formula: V = (4/3)(pi)R^3 Since we know V = 15000, this equation becomes 15000 = (4/3)(pi)R^3 Solve for R.
December 4, 2016

math
you are dealt 13-card bridge hand from a 52-card bridge deck. what is the probability that you will be dealt exactly 5 hearts? what is the probability that you will dealt at list 2 hearts? what is the probability that you will receive 5 hearts, 4 clubs, 2 diamonds, and 1 spade?
December 4, 2016

math
what divided by 7 equals 15
November 23, 2016

Algebra
A ball is thrown vertically upward from the ground with an initial velocity of 103 ft per sec. Determine what the maximum height will be
November 22, 2016

Physics
Thank you for your help!
November 19, 2016

Physics
Ah, you subtract .23 from .747. Thanks! But what about part b? Do you find when net work = 0?
November 19, 2016

Physics
A 3.20 kg block starts at rest and slides a distance d down a frictionless 30.0° incline, where it runs into a spring (Fig. 8-6). The block slides an additional 23.0 cm before it is brought to rest momentarily by compressing the spring, whose spring constant k is 443 N/m. ...
November 19, 2016

Math
In a large section of a statistics class, the points for the final exam are normally distributed, with a mean of 72 and a standard deviation of 9. Grades are to be assigned according to the following rule: The top 10% receive A's. The next 20% receive B's. The middle ...
November 18, 2016

Math
In a large section of a statistics class, the points for the final exam are normally distributed, with a mean of 72 and a standard deviation of 9. Grades are to be assigned according to the following rule: The top 10% receive A's. The next 20% receive B's. The middle ...
November 18, 2016

Statistics
Note: For part c, the probability statement should read P(xbar < 3500). The bar denotes sampling means.
November 17, 2016

Statistics
(A) From the problem statement, N(7400, 2900). P(X < 3500) = .0893 (B) ... .0893? (C) This is a test of means. For this we make a new distribution, N(xbar, s), where xbar = mu, s = sigma / sqrt(n). N(7400, 1674.32) P(X < 3500) = .0099
November 17, 2016

Difficult Math
Uh... I'm guessing that .2 means 20%? Because you can't have .2 of a card? But then the total cards you have sums to over 100% and welp.
November 17, 2016

Science
Not enough information. Work is defined as (the sum of) Force(s) dot displacement. So we'd need the direction of the displacement vector. I guess you could argue that "carry" implies perfectly horizontal displacement. In which case, W = 0J. In that case, the ...
November 17, 2016

Algebra
From the problem statement we derive a system of equations. 4a + 3b = 64 a + b = 19 There are a variety of ways to solve this, but I'll use substitution. Isolate a variable. a = 19 - b ... And substitute that into the other equation. 4(19 - b) + 3b = 64 76 - 4b + 3b = 64 -...
November 17, 2016

Statistics
From the problem statement, N(32, 7). (A) 2 years is equivalent to 24 months. We want to know how many watches will break on average. P(X < 24) = .1265 = 12.65% (ouch) (B) This statement asks that we modify the warranty so that less than 16% of watches are refunded. We use ...
November 16, 2016

Physics
Yeah. Set up your static equilibrium equations relative to another pivot. I would recommend doing it at the 100 cm mark, where F is, but it doesn't really matter so long as it's not at the 0 cm mark.
November 16, 2016

Physics
What's N supposed to be? The knife? If so, you would have to pick a different pivot and repeat the process for it.
November 16, 2016

Physics
Start by drawing a picture. You have a meter stick of supposedly uniform mass, so the force due to gravity should be in the geometric center, pointing down. We know on the left end we have an upwards force due to the knife, and at the 40 cm mark a weight. Let's pick the ...
November 16, 2016

English
Inscribed on. Gotta love those English idioms.
November 16, 2016

Physics
As the problem states, this is a conservation of energy problem, so E(initial) = E(final) Let's pick our coordinate system to be point at which the ball initially rests. This makes the initial potential energy 0. When the ball is at its highest point, the velocity is ...
November 16, 2016

6 grade math
So we know that the result of doubling a number and subtracting 27 gives 407. Since your teacher wants a guess and check table, let's just start guessing numbers around the 200 mark, since we know double the number at some point.
November 16, 2016

Statistics
The standard normal curve is N(0, 1). That 6.6& of the curve lies right to the desired z means that .944 of it lies to the left. Use the inverse norm function with the above data in a calculator or look it up in a table. z = +1.589.
November 16, 2016

Algebra
Two fair eight-sided rolled. If a two is showing on one of the die, what is the probability that the sum is six or less?
November 16, 2016

Geometry
You're doing it right. Exact answer just means to keep your answer in symbolic form-- keep your constants. pi * 4^2 * 9 = 144pi (exact) If we wanted the approximate answer, we could substitute pi = 3.14, and then you get 452.
November 13, 2016

Graphing Linear Equations and Inequalities
Pretend that the inequality is an equals sign, so y = 2x. This is a line with slope of +2, and it's x and y intercepts at the origin. Now we want y to be less than 2x. This is represented as the area above / right of the line. To prove this to yourself, you could always ...
November 13, 2016

statistic
I suppose it would depend on how you're defining "overpaying." Certainly, we can assume that the distribution of houses is N(650, 90), and from that, we can conclude that Sam paid an amount one standard deviation above the mean. Whether that is overpaying or not ...
November 13, 2016

physics
Yeah, you have the right process. After you calculate the net force in x and y directions, construct a right triangle by drawing your vectors head-to-tail. |------ | / | / | / | / theta The hypotenuse has a length of ~3188 by Pythagorean theorem. To calculate the angle, we use...
November 13, 2016

Data
We calculate the number of ways each nationality can order their members. This is simple permutations. Canadians: 3! = 6 Americans: 4! = 12 Mexicans: 2! = 2 However, we can also manipulate the order of our diplomats (i.e. Canada, America, Mexico v. Canada, Mexico, America). ...
November 13, 2016

math
By how much does 17 exceed the difference of 5 and -5?
November 12, 2016

Science
In a tennis match the player hits the ball to serve the ball travels 24m from the servers raquet to the opponents Raquet at an average speed of 40 meters per second.calculate the time taken
November 10, 2016

Math
Suppose a tunnel is 44 feet wide and 22 feet high is in the shape of a parabola. A) Determinate an equation, f(x), of a parabola to represent this situation and B) provide a graph to support your work. Suppose lanes pass trought the tunnel that are each 12 feet wide. C) ...
November 9, 2016

economics
Economics
November 8, 2016

Math
The x-intercept of a graph is when y is 0. 5x - 12(0) = 60 x = 12 So our point is (12, 0). Likewise, the y-intercept is when x is 0. 5(0) - 12y = 60 y = -5 So our point is (0, -5). The distance between two points is given by the formula: Dist = sqrt{(x0 - x1)^2 + (y0 - y1)^2...
November 6, 2016

communications
what is the most distorted or misinterpreted topic on the internet?
November 4, 2016

Physics
A)A 100kg person is riding a 10kg bicycle up a 25degree hill. The hill is long and the coefficient of static friction is 0.9. How much force does the person have to apply in order for her to ride 10m up the hill at constant velocity? B) If the person now starts from rest from ...
November 3, 2016

math
Given that [sin(A-B)/cos(A+B)]=1/3[tan(A-B)], find the values of cosB if sinA=1/2
November 3, 2016

social studies
1.  How did Washington handle the war between Britain and France?  (1 point) The U.S. formed an alliance with France to fight against Britain. The U.S.&...
November 1, 2016

Physics
Six dogs pull a two-person sled with a total mass of 280 kg. The coefficient of kinetic friction between the sled and the snow is 0.080. The sled accelerates at 0.65 m/s2 until it reaches a cruising speed of 15 km/h. What is the team's maximum power output during the ...
October 30, 2016

Physics
A pile driver lifts a 450 kg weight and then lets it fall onto the end of a steel pipe that needs to be driven into the ground. A fall of 1.5 m drives the pipe in 45 cm. What is the average force exerted on the pipe?
October 30, 2016

HCC
A manufacturer of hospital supplies has a uniform annual demand for 80,000 boxes of bandages. It costs $10 to store one box of bandages for one year and $160 to set up the plant for prduction. Haw many times a year should the company produce boxes of bandages in order to ...
October 30, 2016

social studies
explain how the civic virtues of the ancient romans inspired the founding fathers vision of how citizens should conduct themselves in the united states
October 27, 2016

english
Tanya's pet hamster likes sleeping behind the computer. I have to pick out the prepositional phrase and then identify its object.
October 25, 2016

history,college
What are some secondary sources and primary sources about Joan of Arc's impact on how Christianity viewed females after Joan's death?
October 24, 2016

Math
A rectangular shaped desk has a length of 36 inches and a width of 16 inches. A desk with a similar shape has a width of 24 inches. What is the length of this desk?
October 20, 2016

Math
A 6-foot person standing 15 feet from a streetlight casts a 10-foot shadow. Two similar triangles are formed. One triangle is formed by the person and the shadow that the person casts. A second triangle is formed by the streetlight and the ground from the base of the ...
October 20, 2016

Science
What was the answer???
October 19, 2016

math
the tallest woman who ever lived cast a shadow of 10 feet while a 3 foot vertical stick cast a shadow of 3' 11". how tall was the woman to the nearest inch?
October 18, 2016

Social studies
1, what was Alexander Hamiltons main reason for insisting all the nations debts be paid in full? So the country could borrow in the future So the country would be seen as a world leader Because many citizens needed the money Because the nation had a moral obligation to do so...
October 18, 2016

Art History, college
Q: How did the Babylonians make the Ishtar Gate blue (and all its other colors)? A: The Babylonians make the Ishtar Gate blue (and all its other colors) through the use of blue glazed enameled bricks for the blue which was thought to be made of the precious stone,lapis luzli, ...
October 16, 2016

Art History, college
Q:The Old Kingdom, or Old Dynasty, of Egypt is considered the golden age of Egypt. Using specific examples, explain why. A:The Old Kingdom, or Old Dynasty, of Egypt is considered the golden age of Egypt because of the monumental building efforts such as the funerary complex of...
October 16, 2016

Art History, college
Q:The Old Kingdom, or Old Dynasty, of Egypt is considered the golden age of Egypt. Using specific examples, explain why. A:The Old Kingdom, or Old Dynasty, of Egypt is considered the golden age of Egypt because of the monumental building efforts such as the funerary complex of...
October 16, 2016

Algebra
if tickets are sold for $50, then 600 tickets are expected to be sold. For each $1 reduction in price, an additional 20 tickets will be sold. Write an equation that gives revenue R from ticket sales when the ticket prices are reduced by "x" dollars.
October 10, 2016

History
All day long and in all places I am always fastening upon you, stirring you and persuading you and reproaching you. You will not easily find another like me. Use the passage to answer the question. 1. In the passage, what Greek philosopher describes his own method of seeking ...
October 10, 2016

History, college
What are some natural events mentioned in Robert Bartlett's book "The Natural and the Supernatural in the Middle Ages"?
October 10, 2016

Science
Yes
October 9, 2016

calculus
Sorry, supposed to be from 0 to 2pi
October 6, 2016

calculus
use Simpson's with n=10 to approx. f(x)= x sin x, 0¡Ü x ¡Ü2¦Ð round to 6 decimal places I know I set up the calculation correctly like this: (pi/15)(f(0)+4f(pi/5)+2f(2pi/5)+...+2f(8pi/5)+4f(9pi/5)+f(2pi) I keep getting a negative answer but...
October 6, 2016

Social studies
Can someone check my answers 1, Which of the following was one way different regions of the country agreed? Support of slavery Support for the war of 1812 Support of foreign policies Support of economic stability?****** 2, which of the following was the main reason Spain ...
October 6, 2016

math
Write a compound inequality that each graph could represent
October 2, 2016

Psychology
In Schachter and Singer's experiment, participants who received epinephrine injections reported euphoria in a happy situation and anger in an insulting situation. Why were the results difficult to interpret? a) Placebo injections produced the same results as epinephrine. ...
October 1, 2016

psychology
Goals are most effective at motivating increased efforts if the goals are a) challenging (somewhat better than you have done in the past). b) flexible (such as "do your best"). c) private. d) easy. a is my answer
October 1, 2016

History
1. That is correct as the traditional range for the Sioux people was from the Dakotas to Wyoming. 2. That is correct because the Aztecs lived in a swampy and marsh filled environment which means farming in terraces would be the best option for crops surviving floods. 3. That ...
September 29, 2016

Math
There are 11 kids in your math class. 3 of them are girls and 8 of them are boys. There are 6 bananas and 12 apples in the bowl.
September 28, 2016

college, history
Yes I have but he is so vague about what he considers things being natural in the Middle Ages that I decided to ask for help and the same thing with the supernatural I've got the gist, I just need some rock-hard examples to make my essay that much better for both what he ...
September 28, 2016

college, history
What does Robert Bartlett in the "The Natural and the Supernatural in the Middle Ages" say about things about being beyond nature and what examples does he give? Also,what does Robert Bartlett in the "The Natural and the Supernatural in the Middle Ages" say...
September 28, 2016

history,college
So in my shoes, Bob, would you rewrite what I have for my answer by including what you stated above?
September 26, 2016

history,college
What was the distinction between natural and supernatural events in the medieval world? (One of the questions that I have to answer in an essay regarding Robert Bartlett's book 'The Natural and the Supernatural in the Middle Ages) My answer: Natural events can be ...
September 26, 2016

History, college
Hi, I need help with making a stronger thesis statement that I'm going to use on my midterm assignment for Pre-Modern World History. Here's the thesis statement that I've come up with: The book 'The Natural and the Supernatural in the Middle Ages' portrays ...
September 25, 2016

people
Who is Jishha?
September 22, 2016

Algebra
Thanks, but I wanted someone to show me how to FIND the answer.
September 22, 2016

Algebra
1.Use the distributive property to simplify the expression. (-1)(4-c) Can someone show me how to work this out? I'm stuck. :C
September 22, 2016

chemistry
How many mL of 0.6 M H2SO4 solution are needed to react completely with 23.62 g of Fe2O3 in the following reaction?
September 20, 2016

maths
Three boys earned a total of 235.50.What was the averge amount earned per boy
September 20, 2016

Physics
A woman stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.70 of her regular weight. 1).Calculate the magnitude of the acceleration of the elevator. Express your answer to two significant figures and include ...
September 19, 2016

Social Studies
Thanx connection students
September 15, 2016

Social Studies
a cd b c c c b b d a
September 15, 2016

World History
hey nikki im also in connexus maybe we could sometimes help each other if u have kik or skype thatd be cool
September 14, 2016

Math, ratio, part to part ratio etc...
There were 40 students per bus for the field trip
September 12, 2016

Math
Four more than twice Jason's age is the same as his age ten years from now. How old is Jason now?
September 7, 2016

Social Studies
i need help on this to
September 6, 2016

algebra
- 1/3 chance of choosing an O, as there are 6 letters in "school" and 2 of those are O's. 2/6 = 1/3
September 4, 2016

Social Studies
d a d&a
August 30, 2016

algebra
mary had 150 buttons more than gary at first. after mary used 190 buttons gary now has twice as many buttons as mary. find the number of buttons mary had at first.
August 29, 2016

algebra
mary had 150 buttons more than gary at first. after mary used 190 buttons gary now has twice as many buttons as mary. find the number of buttons mary had at first.
August 29, 2016

algebra
You also have two options for lodging. Write an equation FOR EACH OPTION that depicts the total cost of your stay, y, based on the number of days, x. Bilton Hotel: $100/night but you must pay an additional one-time fee of $40 for parking and other fees Triple Tree: $110/night ...
August 13, 2016

statistic
A survey found that​ women's heights are normally distributed with mean 62.5 in. and standard deviation 2.7 in. The survey also found that​ men's heights are normally distributed with a mean 67.9 in. and standard deviation 2.8 . Complete parts a through c ...
July 29, 2016

Physics
htt p://i .imgur. com/mXYFaDV .png this is the link, delete the spaces. Are any of these options correct?
July 18, 2016

Physics
Ok so this is just a small understanding problem, I do not want you to actually help me solve the problem, here it goes: A cylinder with mass 3kg slides on ice with its base surface at 5m/s and collides with an identical but stationary cylinder. The collision is elastic. After...
July 18, 2016

arithmetic sequence
find the 9th term of the arithmetic sequence with Asub1=10 and =1/2
July 6, 2016

arithmetic sequence
give the sequence of 5 term if the first term is 8 and the last term is 100
July 6, 2016

Chemistry
How much energy is released when 2.50g of NH3 rxs with excess N20 given the following 2NH3+3N2O -> 4N2_3H2O; DELTA(H)=-1010KJ. Please give work and setup :)
June 26, 2016

Chemistry
a 2.00 g sample of C6H402 is burned in a calorimeter whose heat capacity is 8kj/C. The delta T is +7.13 degrees C. What is the enthalpy change per mole?
June 26, 2016

math
Add all the numbers up but pay attention you are counting 6.30 twice. then you divide by the numbers of days you have.(5) Your answer should be 5.47
June 21, 2016

math
Arley’s Bakery makes fat-free cookies that cost $1.60 each. Arley expects 40% of the cookies to fall apart and be discarded. Arley wants a 35% markup on cost and produces 200 cookies. Assume that Arley can sell the broken cookies for $1.50 each. What should Arley price ...
June 20, 2016

Pre cal
If Joe invested $7000 at x% and $13,000 at 3% more, find x if the income from both investments is $1190 I'm thinking that the equation would r something like 1,190=(13,000)(.03) but please correct me if I'm wrong. Thank you for your assistance.
June 6, 2016

MATH
Answer=EGG
June 1, 2016

MATH
THOSE WERE THE INSTRUCTION(THIS IS THIRD GRADE MATH)
June 1, 2016

MATH
EACH LETTER IN EACH ADDITION PROBLEM STANDS FOR A NUMBER BETWEEN 0 AND 9.NO TWO LETTERS STAND FOR THE SAME NUMBER IN EACH QUESTION. FIND THE VALUE FOR EACH LETTER.FOR EACH PROBLEM, USE THE NUMBERS IN THE BOX NEXT TO THE PROBLEM. T E N (5,6,1,2,7) + O N _________
June 1, 2016

Physics
H=5.09684
May 24, 2016

Algebra
For f(x) = 0.01(2)x, find the average rate of change from x = 2 to x = 10.
May 19, 2016

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