# Ed

Popular questions and responses by Ed-
## Math 2

Rui is a professional deep water free diver. His altitude (in meters relative to sea level), xxx seconds after diving, is modeled by: d(x)=1/2x^2 -10x What is the lowest altitude Rui will reach? I actually don't understand this problem if its asking for

*asked on September 18, 2017* -
## Physics

Ted Williams hits a baseball with an initial velocity of 120 miles per hour (176 ft/s) at an angle of θ = 35 degrees to the horizontal. The ball is struck 3 feet above home plate. You watch as the ball goes over the outfield wall 420 feet away and lands

*asked on January 18, 2013* -
## Math 2

The rectangle below has an area of 30k^3+6k^2 The width of the rectangle (in meters) is equal to the greatest common monomial factor of 30k^3 and 6k^2 What is the width and length of the rectangle? Width:6k^2 Length: I couldn't find the length I need to be

*asked on September 10, 2017* -
## AP physics 1

A 2.20kg toy plane takes off with an acceleration of 3.30m/s2 . The engine supplies a force of 8.15N . Determine the magnitude of drag force acting on the plane as it accelerates.

*asked on July 16, 2019* -
## math

If two dice are rolled one time, find the probability of getting a sum less than 5.

*asked on November 17, 2012* -
## physics

A person jumps off a diving board 4.3 above the water's surface into a deep pool. The person's downward motion stops 2.1 below the surface of the water.

*asked on September 7, 2011* -
## Math

A die is rolled twice. What is the probability that the sum of the rolls is less than 4 given that one of the rolls is a 1? The answer is 3/11. Could someone tell me how to get this. Thanks?

*asked on May 7, 2011* -
## Managerial econ 1

1)The Midnight hour, a local nightclub, earned $100,000 in accounting profit last year. This year the owner, who had invested $ 1 million in the club, decided to close the club. What can you say about economic profit (and the rate of return)in the

*asked on July 24, 2007* -
## Economics/Marginal Analysis

21st Century Electronics has discovered a theft problem at its warehouse and has decided to hire security guards. The firm wants to hire the optimal number of guards. The follwoign table shows how the number of security guards affects the number of radios

*asked on June 1, 2007* -
## Physics

The sun is 30 ∘ above the horizon. It makes a 54 m -long shadow of a tall tree.

*asked on September 8, 2016* -
## Economics

I think I get this but could use some guidance to make sure, I am having problems with 2e). 1)In an article about the financial problems of USA Today, Newsweek, reported that the paper was losing about $20 million a year. A Wall Street analyst said that

*asked on June 19, 2007* -
## Marginal Analysis

Applacian Coal Mine Co believes it can increase labor productivity and therefore, net revenue by reducing air pollution in its mines. It is estimated that the marginal cost for reducing pollution by installing additional capital equipment is MC =

*asked on June 1, 2007* -
## physics

At a circus, a human cannonball is shot from a cannon at 15m/s at an angle of 40 degrees from horizontal. She leaves the cannon 1m off the ground and lands on the way down in a net 2m off the ground. Determine her horizontal displacement.

*asked on February 13, 2012* -
## physics

Two friends are sitting in a stationary canoe. At the person at the front tosses a sack to theperson in the rear, who catches the sack 2 later. Which plot in the figure shows thevelocity of the boat as a function of time? Positive velocity isforward,

*asked on February 9, 2011* -
## Phyiosics

Three point charges lie in a straight line along the y-axis. A charge of q1 = -9.50 µC is at y = 6.30 m, and a charge of q2 = -7.20 µC is at y = -4.00 m. The net electric force on the third point charge is zero. Where is this charge located? y = m

*asked on December 19, 2010* -
## Economics Help!

4) The manager of Collins Import Autos believes that the number of cars sold in a day (Q) depends on two factor: (1) the number of hours the dealership is open (H) and (2) the number of salespersons working that day (S). After collecting the data for two

*asked on June 4, 2007* -
## Maths

A ball is thrown vertically upwards at 3 m s-1 from 1m above ground level (I) write down the equation for the height of the ball above the ground after t seconds (while the ball is in the air). (II) use your answer to find the time it takes the ball to

*asked on November 17, 2016* -
## Finance

Which of the following best states the difference between seed capital and startup capital? Seed capital is for research and planning while startup capital is for operating expenses. Seed capital is provided by venture capitalists while startup capital is

*asked on November 12, 2014* -
## Math

What is the probability oi rolling a total of 7 in two rolls of a standard die if you get an even number of the first roll? Could someone please help me? Thanks

*asked on May 8, 2011* -
## Physics

What minimum coefficient of friction between the tires and the road will allow a 3700 kg truck to navigate an unbanked curve of radius 25 m at a speed of 45 km/h? My answer: Fnet=ma Ff=m(v2)/r) Ff=(3700)(452/25) Ff=(3700)(2025/25) Ff=(3700)(81) Ff=299700

*asked on November 19, 2010* -
## Chemistry

Could some please tell me if I did this problem correctly? Assume that at a given temperature, there is 1 g of CO2 gas in a one liter volume. How much mass of O2 would there be at the same temperature, in the same volume? My answer: Step 1) Find the number

*asked on October 22, 2009* -
## Econ

The economy contains 2000 $1 bills. a) If people hold all money as currency, what is the quantity of money? b) If people hold all money as demand deposits and banks maintian 100 % reserves, what is the quantity of money? c) If people hold equal amounts of

*asked on July 12, 2007* -
## Electrical theory

a series RL circuit contains two resistors and two inductors. the resistors are 33 ohms and 47 ohms. inductors have inductive reactances of 60 ohms and 30 ohms. the applied voltage is 120 volts. what is the voltage drop on the 33 ohm resistor?

*asked on October 28, 2015* -
## Economics

Are chickens and and cows examples of capital goods? Capital goods are items used in the creation of other goods. Because chickens create eggs and cows make milk, are they consumer goods?

*asked on February 1, 2011* -
## history

Heather bought a ten-year maturity corporate bond when it was issued for $1,000. The bond has an annual interest rate of seven percent and pays interest semi-annually. How much does she receive every six months?

*asked on November 4, 2010* -
## math 7/8 grd

d+s ˃ -3 d ˃ -7 find s it says the answer is 4 (s=4) but it seems not ok because depending on d the number can be pretty much anything

*asked on November 14, 2017* -
## Chemistry

The gas phase reaction X+Y⇄ Z is first order in Y and second order in X. If the concentration of X is double and concentration of Y is tripled. The reaction rate would be increase by a factor of: then, Rate= k [x]^2[y] --> k[x]^4[y}^3 is this the correct

*asked on June 14, 2016* -
## math

A brownie cake recipe requires 2 1/2 cup of sugar. The amount of flour needed is 1/2 cup more than twice the amount of sugar. How much flour is required?

*asked on May 14, 2015* -
## basic electronics

What would happen if the two pith balls shown in Figure A-1 were held together for a few moments, then released? A. The charge would leak off and the pith balls would hang straight down. B. The pith balls would each receive a negative charge and they would

*asked on January 16, 2014* -
## PHYSICS

a 50 kg person running to the east at 8.5 m/s jumps into a 100 kg initially at rest. A)find the velocity of the wagon and person together as they move away.B) If they coast 30 m before coming to a stop, find the average force of the friction that slows

*asked on October 12, 2011* -
## Physics

Acceleration due to gravity is 9.81 m/s/s. What is the weight (in Newtons) of a 97.96 kg mass?

*asked on May 30, 2011* -
## History

Washington's main objective as president of the united states was to: (1) set up a court similar to that of Eurpoean monarchs. (2) establish respect for the office of presidency. (3) keep peace between the northern and southern states. (4) maintain his

*asked on January 6, 2010* -
## Help from The Economyst

I have put together my set of questions that I posted and answered them with yor help and direction, would you mind looking at the finished product for correctness. I still got lost on some of it I think. I could send them to you. EY Post them. We do not

*asked on June 10, 2007* -
## Science

Please help me with these questions from the Science 6: Forces and Motions Unit Test. My answer-****** 1. Which of the following best describes the movement of an object at rest if no outside forces act on it? (1 point) It will move due to inertia. Gravity

*asked on May 21, 2018* -
## math 7/8 grd

d+s ˃ -3 d˃-7 find s the answer supposed to be 4, but I think it is not correct, because depending on d it might be pretty much anything.. any thoughts?

*asked on November 14, 2017* -
## Maths

a circus artist drops a ball from a high wire. The ball takes 1.5 seconds to reach the ground. (i) Find the height of the high wire above the ground (ii) write an expression for the speed of the ball t seconds after it's dropped where 0

*asked on November 17, 2016* -
## Chemistry

Methyl amine is a weak base with a pKb=3.35. Consider the titration of 30.0mL of .030M of Methyl amine with 0.025M HCl. a) Write the appropriate equation for the reaction. b) Calculate K for the reaction in part (a). c) Calculate pH of the initial methyl

*asked on April 27, 2016* -
## University physics

"A droplet of oil carries an extra charge of one electron and is held motionless between parallel plates separated by 1.80 cm across which there is a potential difference of 55.5 kV. What is the mass of the droplet?" I assumed that this whole thing was

*asked on February 10, 2016* -
## Math

Twice the square of a positive number increased by three times the number is 14. Find the number.

*asked on May 12, 2015* -
## Math

Jason is a salesperson in the electronics department store. He is 38% short of his goal for the week. His goal is to earn %450. For each CD player he sells, he earns $57. How many CD players does he need to sell in order to meet his goal?

*asked on September 22, 2014* -
## statistics

A researcher is testing the effect of a new cold and flu medication on mental alertness. A sample of n=9 college students is obtained and each student is given the normal dose of the medicine. Thirty minutes later, each students performance is measured on

*asked on April 29, 2014* -
## math

I am supposed to find the area of a segment of a circle. The circle is cut with two radi with an angle of 90 degrees. Then where the radi touch the circle another line is drawn to connect them. The triangle and the small section between the triangle and

*asked on May 4, 2013* -
## Physical Science

Predict how each of the following changes will affect the following reaction involving gaseous reactants and products: 2NO2 = N2O4 + heat a. the temperature is increased. b. the pressure is increase. c. N2O4 is removed from the equilibrium mixtur. d. NO2

*asked on February 8, 2013* -
## physics

Initially, a particle is moving at 5.30 m/s at an angle of 35.0° above the horizontal (+x axis). Two seconds later, its velocity is 5.97 m/s at an angle of 50.0° below the horizontal. What was the particle's average acceleration during this time

*asked on November 10, 2012* -
## Physics

A certain p-channel JFET has a VGS(off) = +6V. What is ID when VGS = +8V?

*asked on March 9, 2012* -
## physics

A football kicker lines up to kick a game winning kick. The goalpost is 30m away and the ball must clear the 3.3m high cross-bar. If the kick leaves his foot at an angle of 35 degrees, how fast must the kick be to clear the bar?

*asked on February 13, 2012* -
## Calculus

Two forces of equal magnitude act to 60 degrees. If their resultant has a magnitude of 30N, find the magnitude of the equal forces.

*asked on February 11, 2012* -
## physics

A net force of 265 N will accelerate how much mass at 0.5 m/s/s?

*asked on May 30, 2011* -
## Government

Authority possessed by both the state and national government that may be exercised separately and simultaneously are called...... powers. These powers may not be exclusively within the scope of the national power or in conflict with the national law.

*asked on May 12, 2011* -
## Economics

Does the demand-pull theory represent a leakage or injection in the economy? I'm confused.

*asked on May 9, 2011* -
## Chemistry

If calcium carbonate) and aluminum silicate are mixed together and heated then the result is cement. Cement is a mixture of calcium oxide, carbon dioxide, aluminum oxide, and calcium silicate. Write the balanced equation for this reaction. My Answer:

*asked on January 28, 2011* -
## Math

Using the binomial theorem, Find the first three terms in the expansion of (x-(1/x))^5. My solution: C(5,0)x5 + C(5,1)(x4)(-1/x) + C(5,2)(x3)(-1/x)2 x5 + (5)(x4)(-1/x) + 10(x3)(-1/x)2 x5 + (-5x4/x) + 10(x3)(1/x2) x5 + (-5x3) + 10(x) x5 -5x3 + 10x The first

*asked on January 10, 2011* -
## Physics

In an accidental explosion, a satellite breaks in half while in circular orbit about earth. One half is brought momentarily to rest. What is the fate of the half brought to rest? What happens to the other half?

*asked on October 20, 2010* -
## Managerial Econmics

Q4: Ch 5 (10%) In terms of the consumer theory set forth in this chapter, can you explain the meaning of the following statements? a. “I think you get more for your money from Nike than from Reebok.” b. “I wanted to buy a Boxster rather than a

*asked on October 10, 2010* -
## Math

Find the value of the following. 10^(-10log3) The log exponent is confusing me. Could someone please help me? Thanks.

*asked on September 8, 2010* -
## geometry

find x 40x+50=150

*asked on April 27, 2010* -
## math

Ed, Ethan and Nathan are playing a game. Ed has won11 rounds, Ethan has won 8 rounds, and Nathan has won 1 round. Write the relative frequency of Ed not winning a round as a percent. 45%? Is my Answer correct?

*asked on March 9, 2010* -
## Bible Fill In The Blank

1. God can use suffering to cause us to ? spiritually and to bring ? to Himself. I Think the first one is "grow". I'm not sure about the other one. I'm Not Sure For Numbers 2-4 (Below). Please Help Me! 2. Ethical, doctrinal, numerical, and factual

*asked on January 11, 2010* -
## History

During the period of the Crusades, warfare between Christians and Muslims lasted nearly ? years 50 300 200 100

*asked on November 16, 2009* -
## AP physics

a small ball of mass .85 kg is attached to one end of a 1 m long massless rod, and the other end of the rod is hung from a pivot. When the resulting pendulum is 25 degrees from the vertical, what is the magnitude of the torque about the pivot?

*asked on January 28, 2008* -
## AP Physics

A flywheel turns through 46 rev as it slows from an angular speed of 3.1 rad/s to a stop. Assuming a constant angular acceleration, find the time for it to come to rest? What is its angular acceleration (in rad/s^2) ? How much time is required for it to

*asked on January 27, 2008* -
## Managerial Economics Question

1)The Midnight hour, a local nightclub, earned $100,000 in accounting profit last year. This year the owner, who had invested $ 1 million in the club, decided to close the club. What can you say about economic profit (and the rate of return)in the

*asked on July 26, 2007* -
## Managerial Econ 2

1)The chief economist for Argus Corporation, a large appliance mfg., estimated the firm’s short-run cost function for vacuum cleaners using an average variable cost function of the form: 3 AVC = a + bQ + cQ Where AVC = dollars per vacuum cleaner and Q =

*asked on July 19, 2007* -
## Managerial Economics

I'm not sure I have the formulas correct for this problem and I do not know what the labor hours are.... Dimex Company, a sheet-metal mfg., estimates its long run production function is: 3 3 2 2 Q = -0.015625K L + 10K L where Q is the number of body panels

*asked on July 19, 2007* -
## Math

How to factor x^3 - 3x^2 + 4 =0 Use D'Alembert's Rational Roots Theorem. Any rational roots of the form of p/q (p and q assumed to be relatively prime) must be such that p divides the constant term (in this case 4) and q divides the coefficient of the

*asked on July 14, 2007* -
## Economics, Marginal Utilities

Help Economyst.... 1) I think I get this one but maybe n not? Bridget has a limited income and comsumes only wine and cheese, her current consumption is four bottles of wine and 10 pounds of cheese. The price of the wine is $10 per bottle and the price of

*asked on June 11, 2007* -
## algebra

240+.12x>480+.06x

*asked on February 11, 2020* -
## Math

how many different four person committees can be formed from a group of five boys and four girls

*asked on October 2, 2019* -
## Math

Problem: Ms. Ashol has 20 boys and 16 girls in her mathematics class. If she chooses two students at random to work on the blackboard, what is the probability that both students chosen are girls? What I did : I added the boys and girls 36 (16c2)/(36c16)

*asked on September 24, 2019* -
## Math

How many different four-person committed can be formed from a group of six boys and four girls? I don’t understand how to do this problem or set it up at all

*asked on September 24, 2019* -
## Math

From a standard deck of cards, what is the probability you will select: You select one card and it is an ace and black? All I know is a an ace is 4 and there is 26 blacks

*asked on September 12, 2019* -
## Algebra

Using the function f(X)=-3X+1 find f(2M+5)

*asked on January 8, 2019* -
## probability

Marie distributes toys for toddlers. She makes visits to households and gives away one toy only on visits for which the door is answered and a toddler is in residence. On any visit, the probability of the door being answered is 3/4, and the probability

*asked on November 28, 2018* -
## probability

A factory produces copper wires. A blue mark is placed on a very long length of copper. The wire is then cut into pieces. The lengths of different pieces are independent, and the length of each piece is distributed according to the same PDF fX(x). Let R be

*asked on November 28, 2018* -
## Math 7th gr

it is about bowling, your final score is 14 less than your friends, did you have a spare in the 10th round? 9th round 10th final friend 8 - 7 / 6 105 89 105 you 6 3 9 82 I don't know bowling, so it is a bit unfair.. the final should be 105-14=91 and since

*asked on August 29, 2018* -
## math 7 grd

you have to design a space station (model) that has a 120 cm3 volume, and it has to have the possible smallest surface area. it must contain 3 different shapes. (cone and sphere surface are was not covered, only their volume, so they are out....we can

*asked on April 19, 2018* -
## math 7/8 grade

I am having hard time with this question. What are the possible dimensions of the Khufu pyramid, based on the information (asking height, side lengths, slant height) " According to this site 115,000-200,000 casing stones were used The stone blocks usually

*asked on April 18, 2018* -
## Maths

The Random Variable X is normally distributed with mean 560 and standard deviation 20. Find P(X

*asked on February 26, 2018* -
## 6 grade math

wile catching fireflies, you and your friend decide to have a competition. after m minutes, you have (3m +13) fireflies and your friend has (4m+6) fireflies. a. how many fireflies are caught per minute? b. ow many fireflies caught before the competition?

*asked on October 21, 2017* -
## Math 2

Graph g(x)=−6(x−2)(x) Ok so I don't know how to do this because it isent two binomials but if you can help me this is what I got Vertex:1,6 X-intercpts: x=2 Is that right if not explain it to me please!

*asked on September 18, 2017* -
## Math

How can I graph this equation: (x-squared + y-squared - 1)cubed = x-squared times y-cubed ? Is there a polar form of the equation?

*asked on July 21, 2017* -
## algebra

Miranda worked two part-time jobs last week. The first job paid $8 an hour, and the second job paid $11 an hour. She worked a total of 23 hours last week and earned $208. How many hours did Miranda work at the first job?

*asked on July 17, 2017* -
## math

Time Height (Weeks) (CM) 1 1 2 4 3 6 4 9 5 11 ~Ok i have this problem and its a correlation coefficient, There is a lot of questions but how would you find if its linear or exponential.

*asked on March 29, 2017* -
## algebra

Delaney needs to rent a car while on vacation. The rental company charges $17.95, plus 16 cents for each mile driven. If Delaney only has $50 to spend on the car rental, what is the maximum number of miles she can drive?

*asked on March 11, 2017* -
## Chemistry

Identify the chemical reactants in ZnCl2(aq)+H2(g)?

*asked on March 5, 2017* -
## Algebra

manuella likes pepperoni, mushroom, and extra cheese on her pizza. how many different pizzas can she order with one, two, or all three of these toppings?

*asked on March 2, 2017* -
## math

the gas tank in jocko's car hold 12 gallons when it's full. the car gets 18 mi/ gal. How far can he travel on two full tanks

*asked on October 11, 2016* -
## math age problem

I am 10 less than four times my age six years ago how old am I now

*asked on September 5, 2016* -
## Calculus

Solve the following equation on the interval [0,2pi) if sin = -0.29?

*asked on August 21, 2016* -
## Calculate y' and y'' at the point (1,1)

Calculate y' and y'' at the point (1,1) on the curve 5 xy^2+9 y-14 = 0 I got the first part (-5/19) but I can't get the answer for the second

*asked on July 12, 2016* -
## Math

Calculate y' and y'' at the point (1,1) on the curve 5 xy^2+9 y-14 = 0 I got the first part (-5/19) but I can't get the answer for the second

*asked on July 12, 2016* -
## physical science

you are riding in a car traveling at 60mi/hr in a 50 mi/hr zone. you spot a policeman 10 feet ahead. you slow down with an acceleration of -2ft/sec2 for 3 seconds. Do you get a ticket

*asked on June 14, 2016* -
## University physics

"Consider a long charged straight wire that lies fixed and a particle of charge +2e and mass 6.70×10-27 kg. When the particle is at a distance 1.61 cm from the wire it has a speed 2.70×105 m/s, going away from the wire. When it is at a new distance of

*asked on February 10, 2016* -
## Definition

In which sentence is the word SPUTTERS used correctly? a.The engine SPUTTERS when it is started in the cold. b.The ball SPUTTERS as it bounces across the court. c.That tree SPUTTERS when it drops its leaves. d.The wave SPUTTERS as it breaks over the beach

*asked on February 2, 2016* -
## Algebra 2

Mario took a 17 day trip around the U.S. He visited Boston, Miami, Philadelphia and New York. In Boston he spent $200 per day, in Miami $225 per day, in Philadelphia $175 per day and in New York he spent $150 a day for a total of $3400. The number of days

*asked on November 28, 2015* -
## World history

What was the biggest change? Where? Why? Japan China Europe Africa

*asked on November 9, 2015* -
## 4th grade math

there are 4 possible scoring plays in an NFL football game (T) touch down -6 points (A) point after touchdown can only be earn with a touch down) - 1 point (F) field goal - 3 points (S) safety - 2 points 1. how many different ways could the team score 11

*asked on November 9, 2015* -
## World history

What development produced the greatest instability? Where? Why? Japan China Africa Europe

*asked on November 9, 2015* -
## World history

Who benefited the least from the development of feudal systems? Explain why Japan China Africa Europe

*asked on November 9, 2015* -
## World history

Who benefitted the least from the development of feudal system? Explain why Japan China Africa Europe

*asked on November 9, 2015*