# lindsey

Most popular questions and responses by lindsey-
## Please i needd an answer asap!!!

I give medals and 'best answer' :) I need help asap! Which of the following is one way to assess whether or not a learning game is effective? a. Being able to win the game b. doing a quiz before and after the game to see what you have learned c. Making it

*asked on January 8, 2014* -
## physics

A bike first accelerates from 0.0 m/s to 5.0 m/s in 4.5 s, then continues at this constant speed for another 4.5 s. What is the total distance traveled by the bike?

*asked on September 5, 2011* -
## Physics

A 25 kg child slides down a playground slide at a constant speed. The slide has a height of 3.0 m and is 7.0 m long. Using energy considerations, find the magnitude of the kinetic friction force acting on the child.

*asked on November 22, 2011* -
## Investing ( pease help)

You hold a diversified $ 100,000 portfolio consisting of 20 stocks with 5000 invested in each . The portfolio's beta is 1.12. You plan to sell a stock with b=0.90 and use the proceeds to buy a new stock with b=1.75. what will the portfolio new beta be ?

*asked on July 24, 2009* -
## 3rd grade math

Explain how you know 6/6 and 1 are equivalent?

*asked on April 8, 2014* -
## chemistry

Suppose you are asked to find the area of a rectangle that is 2.1-cm \rm cm wide by 5.6-cm \rm cm long. Your calculator answer would be 11.76 cm 2 \rm cm^2 . Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not

*asked on August 29, 2013* -
## 3rd grade math

Will arrived at his mother's office at 3 P.M. It took him 30 minutes to walk from his home to the mall. He was in the mall for 45 minutes. It then took him 15 minutes to walk to his mother's office. At what time did Will leave home?

*asked on May 19, 2014* -
## Chemistry

Please also, help me set up this problem. Acetylene, C2H2, can be converted to ethane, C2H6, by a process known as hydrogenation. The reaction is C2H2(g)+2H2(g)⇌C2H6(g). Given the following data at standard conditions (all pressures equal to 1 atm and

*asked on November 16, 2014* -
## Physics

In the winter sport of curling, players give a 20 kg stone a push across a sheet of ice. A curler accelerates a stone to a speed of 3.0 m/s over a time of 2 s. a)How much force does the curler exert on the stone? b)What average power does the curler use to

*asked on November 22, 2011* -
## Trigonometry

Statuary Hal is an elliptical room in the U.S. Capitol. Teh room is also called the Whispering Gallery because a person standing at one focus of the room can hear even a whisper spoken by a person standing at the other focus. Statuary Hall is 46 ft. wide

*asked on December 19, 2011* -
## Chemistry

Help me set up this problem. I have been looking at a few examples of similar problems and I keep getting the wrong answers. I'm getting really confused. Q: The standard free energy change ΔG∘ and the equilibrium constant K for a reaction can be related

*asked on November 16, 2014* -
## Chemistry

At 25°C, K = 0.090 for the following reaction:H2O(g) + Cl2O(g) 2 HOCl(g) Calculate the concentrations of all species at equilibrium for each of the following cases. (a) 1.2 g H2O and 1.6 g Cl2O are mixed in a 1.4 L flask. (b) 1.2 mol pure HOCl is placed

*asked on February 15, 2009* -
## Finance ( Need help )

Sapp Trucking’s balance sheet shows a total of noncallable $45 million long-term debt with a coupon rate of 7.00% and a yield to maturity of 6.00%. This debt currently has a market value of $50 million. The balance sheet also shows that the company has

*asked on August 3, 2009* -
## Chem

Hydrogen peroxide decomposes according to the following: H2O2--> H2O(l) + 1/2O2(g); deltaH = -98.2kJ Calculate the change in enthalpy, deltaH, when 1.00g of Hydrogen peroxide decomposes

*asked on November 19, 2009* -
## trig

The cross section of a television antenna dish is a parabola. A dish has a receiver that is located at the focus, 4 ft. above the vertex. Find the equation. (which I did) -- x^2 = 8y If the dish is 8 feet wide, how deep is it?

*asked on December 20, 2011* -
## math

The test Keyshawn's class took finished at 10:30 A.M. The first part of the test took 30 minutes. There was a 15 minute break. The second part of the test also took 30 minutes. At what time did the test start?

*asked on May 19, 2014* -
## Physical Science

why is the kinetic energy of the lumber higher on the truck during the delivery than when it drops from the carpenter's shoulder?

*asked on October 22, 2014* -
## Physics

A cube of oak with sides 15cm long floats upright in water with 10.5cm of its depth submerged. What is the density of the oak?

*asked on January 6, 2010* -
## Algebra 2

PLEASE HELP-DUE APRIL 5TH, 2011!!!! EARTHQUAKES an earthquake rated at 3.5 on the Richter scale is felt by many people, and an earthquake rated at 4.5 may cause local damage. The Richter scale magnitude reading m is given by m = log (base 10) x, where x

*asked on March 27, 2011* -
## Algebra

Your test scores in one class are 81 and 87. What possible scores can you earn on your next test to have a test average between 84 and 89, inclusive?

*asked on September 8, 2016* -
## algebra 1

The Fun Guys game rental store charges an annual fee of $20 plus $6.50 per game rented. The Game Bank charges an annual fee of $50 plus $3.50 per game. For how many game rentals will the cost be the same at both stores? What is that cost?

*asked on January 15, 2016* -
## Absolute value

Bertrand collects movie posters. The number of movie posters in his collection changes each month as he buys and sells posters. The table show how many posters he brought or sold in the given months. January sold 20, February bought 12, March bought 22,

*asked on September 2, 2014* -
## Physical Science

Calculate: In the following equation, 417.96 g of Bi (bismuth) reacts completely with 200 g of F (fluorine.) How many grams of BiF (little three below F) are formed? 2 Bi + 3 F (little 2 under F) ---> 2 BiF (little three below F)

*asked on March 25, 2015* -
## civics

Which of the following describes a way geographic features influenced how north american countries were settled ? A. populations were greatest in inland areas where climates were more moderate. B.people settled along the borders between countries to make

*asked on June 4, 2014* -
## Math

When Maria Acosta bought a car 2.5 years ago, she borrowed $10,000 for 48 months at 7.8% compounded monthly. Her monthly payments are $243.19, but she'd like to pay off the loan early. How much will she owe just after her payment at the 2.5 year mark?

*asked on October 4, 2017* -
## Chemistry

i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there? Responses Chemistry - DrBob222, Monday, February 16, 2009 at 12:35am Just ignore the Cl^-. Co(H2O)6Cl3 ==>

*asked on February 16, 2009* -
## chemistry

1. What mass of lead chloride (PbCl2, MW= 278.2; Ksp= 1.8 x 10^-10) is dissolved in 250 mL of a saturated solution? 2. What mass lead chloride (PbCl2, MW=278.2; Ksp=1.8 x 10^-10) will dissolve in 150 mL of 0.050 M Pb(NO3)2?

*asked on July 31, 2010* -
## Finance ( NEED HELP BAD)

Masulis Inc is considering a project that has the following cash flow and WACC Data .what is the project discounted payback WACC 10% years 0 1 2 3 4 CASH FLOW -700 525 485 445 405

*asked on July 29, 2009* -
## math

If you need 240 oz of paint to cover 1200 in. How much paint do you need to cover 2000 in.?

*asked on February 24, 2012* -
## Math

Danielle spend 2/5 of her paycheck on bills. Her water bill was 1/6 of what she spent on bills. What part of her paycheck went to her water bill? Is this right? 1/6 x 2/5 = 2/30 = 1/15? Thanks.

*asked on February 21, 2017* -
## Geometry

Triangle UVW is the pre-image of triangle RST with a scale factor of 3. Find the area of triangle UVW if the area of triangle RST is 9 cm2.

*asked on May 2, 2012* -
## physics

A 15 ohm resistor is made from a copper wire of mass 14.2 grams. What is the wire's diameter and length?

*asked on March 4, 2013* -
## Physics/Charges

Point charges Q1 = 50 µC and Q2 = -20 µC are placed 2 meters apart. Where can I put a third charge so that the net electrical force on it is zero?

*asked on February 4, 2013* -
## Physics

Please try to be clear in your explanation!! A swimmer bounces straight up from a diving board and falls feet first into a pool. She starts with a velocity of 5.00 m/s, and her takeoff point is 1.50 m above the pool. (a) How long are her feet in the air?

*asked on November 14, 2011* -
## Finance ( Please help)

Warnock Inc is considering a project that has the following cash flow and WACC Data What is the projects NPV ?note THAT a projects NPV Can be negative in which case it will be rejected . WACC 10.00% year 0 1 2 3 Cash Flows -825 500 400 300 I get C but i am

*asked on July 29, 2009* -
## Pre-Algebra

problem: Dena borrowed $7500 to buy a used car. The credit union charged 9%(percent it looks kind of funny) simple intrest per year. She paid $2025 in interest. For what period of time did she borrow the money. It would be 3 years. Get how much they charge

*asked on February 5, 2007* -
## physics

A 0.36 kg soccer ball approaches a player horizontally with a velocity of 18 m/s to the north. The player strikes the ball and causes it to move in the opposite direction with a velocity of 21 m/s. What impulse was delivered to the ball by the player?

*asked on January 26, 2012* -
## Physics

A 5 kg block is pushed up a 37 degree incline given an initial velocity of 2 m/s at the base of a frictionless plane. The maximum vertical displacement of the block is nearly what?

*asked on October 25, 2009* -
## Algebra 1

Solve each system using elimination. 1.) 5x - y=0 3x + y=24 2.) 3x + 3y =27 x - 3y =-11 3.) 6x +4y =42 -3x + 3y =-6

*asked on February 25, 2015* -
## Chemistry

Given the unbalanced equation: (NH4)2 CO3-> NH3 + CO2 + H2O Calculate the mass of ammonia gas that is produced if 1.25g of ammonium carbonate decomposes completely.

*asked on April 22, 2012* -
## English

In Lord of the Flies, why is Percival unable to remember his name and address? Also here: http://www.novelguide.com/novellist.asp?sortby=Title&char=L and here: http://en.wikipedia.org/wiki/Lord_of_the_flies

*asked on July 15, 2007* -
## physics

A scale is marked off in centimeters on a long table. A coin initially at the position labeled 130.0 is moved to the position marked -20.0. What is the displacement of the coin?

*asked on September 11, 2013* -
## Chemistry I

Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: In

*asked on November 1, 2011* -
## Chemistry

Suppose MgSe(a=545 pm) and SrSe (a=623 pm) both crystallize with a NaCl (rock salt) structure. Calculate the ionic radius of Sr2+ (Hint:Assume that the Se2- ions actually touch in MgSe.)

*asked on February 10, 2012* -
## 9th grade

A 5-kg rock is lifted 2 meters in 5 seconds. How much work is done? How much power is done?

*asked on February 12, 2009* -
## algebra

A cashier has a total of 34 bills, made up of ones, fives, and twenties. The number of fives is one less than the number of twenties. The total value of the money is $237. How many of each denomination of bills are there? (Hint: Let x = the number of ones,

*asked on February 13, 2016* -
## Algebra

Which property is illustrated by 45 + 19 = 19 + 45? A. Commutative property of addition B. Identity property of Addition C. Associative property of addition D. zero property of addition

*asked on December 16, 2014* -
## physics

In preparing to shoot an arrow, an archer pulls a bowstring back 0.49 m by exerting a force that increases uniformly from 0 to 277 N. What is the equivalent spring constant of the bow?

*asked on March 18, 2016* -
## Physics 1

A meter stick has a mass of 200g and its center of gravity is at the 50.0 cm mark. If 150g is attached to the stick at the 10 cm mark, where would an upward force on the stick need to be placed to balance the stick and the added mass?

*asked on March 9, 2011* -
## Physics

A football punter accelerates a football from rest to a speed of 9.1 m/s during the time in which his toe is in contact with the ball (about 0.247 s). If the football has a mass of 484 g, what average force does the punter exert on the ball?

*asked on January 21, 2013* -
## Physical Science

Identify these functions galvanometer step-up transformer electric motor generator electromagnet step-down transformer commutator

*asked on February 3, 2015* -
## PHysics

The sound emitted by bats has a wavelength of 3.45 mm. What is the frequency in air? The speed of sound in air is 343 m/s.

*asked on March 21, 2013* -
## Math

A $10,000 loan is to be amortized for 10 years with quarterly payments of $349.72. If the interest rate is 7%, compounded quarterly, what is the unpaid balance immediately after the sixth payment? (Round your answer to the nearest cent.)

*asked on October 4, 2017* -
## Chemistry

Calculate how many moles of products(s) would be produced if 0.500 mole of the first reactant were to react completely. BaCl2 + 2AgNO3 --> 2AgCl +Ba(NO3)2

*asked on April 22, 2012* -
## Chem

Determine the mass of iron heated to 85 Celsius to add to 54.0g of ice to produce water at 12.5 Celsius. The speciic heat of iron is 0.045J/g C What steps do I take to solve this problem? Thanks

*asked on November 19, 2009* -
## chemistry

39.3 grams of c6h6 are allowed to react with 108.3 grams of o2. How much co2 will be produced by this reaction?

*asked on May 25, 2015* -
## Physical Science

Fill in the blanks using the correct term from the list below. Active Combustion free heating systems passive heat pump thermal energy stroke 1. A house with large windows on its south side and few windows on its other sides probably uses a(n) Blank solar

*asked on December 10, 2014* -
## Solve. W rite each answer in simplest form.

Erin buys a bag of peanuts that weighs 3/4 of a pound. Later that week, the bag is 2/3 full. How much does the bag of peanuts weigh now? Show your work

*asked on September 16, 2014* -
## Chemistry

Consider: C6H12)6 + 6O2-> 6CO2 + 6H2O + Energy a)If I have 90 grams glucose and all is consumed by oxygen, then how many grams of water will be produced? b)How many grams of oxygen will be consumed? c)How many grams of sugar will be burned off if 85 grams

*asked on January 22, 2011* -
## physics

a child is twirling a 0.0120 kg ball on a string in a horizontal circle whose radius is 0.100m. The ball travels once around the circle in 0.500s. Determine the centripetal force acting on the ball

*asked on December 17, 2014* -
## Chemistry

Consider an atom of Xenon. How many electrons in this atom... a) have the quantum number of l=2 b) have the quantum number of ml=0 c)have the quantum numbers n=5,ml=2 (at the same time) I think I know the answers. a) 10 b)2 c)2 But I am unsure and would

*asked on January 25, 2012* -
## Math

A year-end bonus of $24,000 will generate how much money at the beginning of each month for the next year, if it can be invested at 6.45%, compounded monthly? (Round your answer to the nearest cent.)

*asked on September 28, 2017* -
## Business Research

1. You are the head researcher on a study that is tracking vocational preferences from high school through middle adulthood. List the steps you would take in selecting the sample to be used in the study. 2. A researcher decides to give a questionnaire on

*asked on January 25, 2012* -
## Chemistry

i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there?

*asked on February 15, 2009* -
## A/P Calculus

A cyclist is riding on a path whose elevation is modeled by the function F(X)=0.2x where x and f(x) arte measured in miles. Find the rate of change of elevation when x=5. ? Supposed answer: ?? 1

*asked on November 9, 2013* -
## Physic Help

Charge is distributed through an infinitely long cylinder of radius R in such a way that the charge density is proportional to the distance from the central axis: ß = A r, where A is a constant and ß is the density. (a) Calculate the total charge

*asked on February 18, 2013* -
## Physics

Two objects are connected by a light string that passes over a frictionless pulley as in the fi gure. One object lies on a frictionless, smooth incline. In the figure, m1 = 8.48 kg, m2 = 4.84 kg, and theta = 40.2 degrees . When we let go of the mass m1,

*asked on January 27, 2013* -
## science

Can someone please tell me if this paragraph makes any sense at all? I feel like I contradict myself, as I do not understand the subject very well. Thank you. "Since neither of the parents in the pedigree has the genetic disorder (as indicated by their

*asked on June 27, 2011* -
## geometry

Remove the radical from the denominator below. Do not simplify the answer. -2 sqrt15 / (6- sqrt13)

*asked on April 21, 2015* -
## Chemistry

Calculate the pressure in an evacuated 250. mL container at 0.00 degrees C if 3.20 cm^3 of liquid oxygen evaporates. Assume that the liquid oxygen has a density of 1.118 g/cm^3 I understand that the density and volume can be used to find the mass in grams.

*asked on May 7, 2012* -
## physics

Human blood contains plasma, platelets, and blood cells. To separate the plasma from other components, centrifugation is used. Effective centrifugation requires subjecting blood to an acceleration of 2000g or more. In this situation, assume that blood is

*asked on August 31, 2011* -
## Algebra 1

jack is taking his family to the fair. he plans to take $5 for each admission ticket plus $35 for food. Write an equation that models the amount of money jack takes to the fair.

*asked on December 16, 2014* -
## science

How often would a restriction enzyme such as Not I, which has 8 nucleotides in its recognition sites 5’-GCGGCCGC-3’, cleave DNA on average? Would it cleave a species DNA more or less often if the DNA from that species were 70% A-T rich?

*asked on February 2, 2014* -
## Chemistry

Balance the equation. Cu + HNO3 --> Cu(NO3)2 + NO2 + H2O I'm having a little trouble getting this equation to balance. Thank you in advance! :)

*asked on April 16, 2012* -
## Chemistry

What is the Henderson-Hasselbach equation? Use the equation to determine the ratio of [A-] to [HA] necessary to create an ammonium chloride/ammonia buffer with a pH of 8.50. Describe how to make this buffer given a solution of 0.1 M NH3 (aq) and a bottle

*asked on March 4, 2012* -
## Physics

A plane is headed due west with an air speed of 221 m/s. The wind blows south at 37.5 m/s. Find the velocity of the plane relative to the earth. The question asks for the magnitude which I found is 224 m/s. The question also asks for the

*asked on February 2, 2011* -
## chemistry

What are the monomers of aspartame? I can only get one, which is methan ol, but what are the others?

*asked on May 10, 2008* -
## Math Quantitive Reasoning

The amount of Jen's monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $12. What percentage of her phone bills are between $14 and $86?

*asked on December 2, 2007* -
## Algebra

A 30-pack of blank CDs costs $9.50. A 50-pack of blank CDs costs $13. How can you tell which is the better buy?

*asked on October 27, 2014* -
## sixth grade math problem

Bertrand collects movie posters. The number of movie posters in his collection changes each month as he buys and sells posters. The table show how many posters he brought or sold in the given months. January sold 20, February bought 12, March bought 22,

*asked on September 2, 2014* -
## statistics

Based on data from the National Center for Health Statistics, N. Wetzel used the normal distribution to model the length of gestation for pregnant US woman ( Chance, Spring 2001). Gestation length has mean of 280 days with a standard deviation of 20 days.

*asked on March 17, 2013* -
## Investing

You hold a diversifield $ 100,000 portfolio consisting of 20 stocks with 5000 invested in each . The portfolio's beta is 1.12. You plan to sell a stock with b=0.90 and use the proceeds to buy a new stock with b=1.75. what will the portfolio new beta be ?

*asked on July 23, 2009* -
## Physics

A boat travels across a wide river. if the boat can travel at a speed of 25 mph and its pilot heads in a direction of 30 degrees, while the current's velocity is 5.1 mph at a heading of 270 degrees, what will the final velocity of the boat be?

*asked on September 21, 2015* -
## Algebra 1

Identify the initial amount a and the decay factor b in each exponential function. 1.) y= 0.1* 0.9^x

*asked on April 8, 2015* -
## Algebra 1

solve each system by substitution. check your answers 4y +3 = 3y +x and 2x +4y =18

*asked on February 24, 2015* -
## Algebra 1

students measured the diameters and circumferences of the tops of a variety of cylinders. Below are the data that they collected. estimate the diameter of a cylinder with circumference 22cm. Cylinder Tops Diameter(cm) 3,3,5,6,8,8,9.5, 10, 10, 12

*asked on February 11, 2015* -
## Physical Science

Explain the role friction plays in the conservation of energy.

*asked on October 22, 2014* -
## A/P Calculus

A Cyclist is riding on a path whose elevation is modeled by the function f(x) = 0.08(16x-x^2) where x and f(x) are measured in miles. Find the rate of change of elecation when x=4. Would this be 0.64? dx/dt would be 1.28 - 0.16x and then plug in four?

*asked on November 9, 2013* -
## Statistics

Suppose a data set has a linear regression line of y = 6 -0.8x. If the mean of the x's is 5, what is the mean of the y's? 2 5 10 6 None of the above

*asked on February 18, 2013* -
## Chemistry

A limiting reactants problem. 6.32g of sodium sulfate is reacted with 12.03g of barium nitrate. How many grams of the precipitate would you expect to collect. The answer my teacher gave me is 16.0g BaSO4, but I cannot get it. The equation I formed is:

*asked on April 15, 2012* -
## science

Can someone please tell me if this paragraph makes any sense at all? I feel like I contradict myself, as I do not understand the subject very well. Thank you. "Since neither of the parents in the pedigree has the genetic disorder (as indicated by their

*asked on June 27, 2011* -
## Chemistry

How many liters of 12.3 molar NaOH stock solution will be needed to make 12.4 liters of a 1.2 molar NaOH solution?

*asked on May 1, 2011* -
## chemistry

The correct interpretation of the equation below is: Fe3+(aq) + SCN–(aq) --> and

*asked on April 9, 2008* -
## MATH

An entry level position pays 8 dollars per hour. A 4% raise is given at the end of each year of employment. What would the pay be after 3 years? My mom tried to help me and she got 8.998912 which we figured would round to 9 dollars. When i reworked the

*asked on February 2, 2008* -
## Rate of change

I have some questions that I would like you to check please. Thanxs! Find the slope then describe what it means in terms of the rate of change of the dependent variable per unit change in the independent variable. 1. The linear function f(x)=4.6x+37

*asked on September 1, 2007* -
## Calculus

I am trying to find the integral of e^(6x)sin(7x). Apparently, the answer is (6e^(6x)sin(7x) - 7e^(6x)cos(7x))/85) + C and achieving the answer is mostly understandable since it involves integrating the function in parts... that is until I get to this

*asked on October 7, 2018* -
## chemistry

While in Europe, if you drive 125km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 26.0mi/gal ? Assume that 1euro=1.26dollars.

*asked on February 13, 2015* -
## Principles of Chemistry

A certain amount of chlorine gas was placed inside a cylinder with a movable piston at one end. The initial volume was 3.00 L and the initial pressure of chlorine was 1.30atm . The piston was pushed down to change the volume to 1.00 L. Calculate the final

*asked on October 6, 2014* -
## chemistry

A helium atom weighs 6.65 X 10 to the negative 24 grams. How many helium atoms are contained in a 1.0 g sample?

*asked on April 16, 2011* -
## math

The only part of the height equation that we have not discussed is the constant. You have probably noticed that the constant is always equal to the initial height of the ball (80 m in our previous exercises). Now, let’s have you develop a height

*asked on July 18, 2007*