# LIndsey

Popular questions and responses by LIndsey-
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## Algebra

A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = -0.04x^2+5.8x+4.9, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of

*asked on April 2, 2020* -
## 3rd grade math

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

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

A cell phone company orders 400 new phones from a manufacturer. If the probability of a phone being defective is 2.1%, predict how many of the phones are likely to be defective. Round your answer to the nearest whole number. I'm really sorry but I need

*asked on May 19, 2020* -
## 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

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 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* -
## geometry

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

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

In a batch of 860 calculators, 9 were found to be defective. What is the probability that a calculator chosen at random will be defective? Write the probability as a percent. Round to the nearest whole number percent if necessary. a. 1% b. 10% c. 3% d. 7%

*asked on May 20, 2020* -
## Algebra

A construction company orders 2900 new light bulbs for a new office building. If the probability of a light bulb being defective is 1.9%, predict how many of the light bulbs are likely to be defective. Round your answer to the nearest whole number.

*asked on May 20, 2020* -
## Algebra

A cell phone company orders 400 new phones from a manufacturer. If the probability of a phone being defective is 2.1%, predict how many of the phones are likely to be defective. Round your answer to the nearest whole number.

*asked on May 19, 2020* -
## math

A sample of 4 balls is to be selected at random from an urn containing 18 balls numbered 1 to 18. Five balls are green, 6 balls are white, and 7 balls are black. (a) How many different samples can be selected? (b) How many samples can be selected that

*asked on February 29, 2020* -
## 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* -
## 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* -
## 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* -
## 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* -
## Chem help

For which of the following molecules would the intermolecular forces be influenced mainly by dipole-dipole forces? PH3 CH3OHO HF C2H5OH CH3COCH3 how do I determine this

*asked on November 2, 2012* -
## Physics

~I got a and b right but c i can't figure out Freight trains can produce only relatively small acceleration and decelerations. (a) What is the final velocity of a freight train that accelerates at a rate of 0.0600 m/s2 for 8.00 min, starting with an

*asked on November 4, 2011* -
## 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* -
## 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* -
## 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* -
## Algebra

You want to determine the number of text messages students at your school make in a month. You select 10 freshmen, 10 sophomores, 10 juniors, and 10 seniors to ask, a. random b. systematic c. stratified Would the answer be systematic

*asked on May 20, 2020* -
## Algebra

A spinner is numbered 1-8. What are the ODDS of landing on a number greater than 5?

*asked on May 20, 2020* -
## Algebra

You have the numbers 1–24 written on slips of paper. If you choose one slip at random, what is the probability that you will NOT select a number which is a multiple of 3? a. 2/3 b. 3/8 c. 1/3 d. 5/8

*asked on May 20, 2020* -
## Algebra

A drug trial is testing the effectiveness of two drugs. If 40 patients are given Drug A, 80 patients are given Drug B, and 20 patients are given a placebo, what is the probability that a patient will receive drug B? a. 4/7 b. 6/7 c. 3/10 d. 1/5

*asked on May 20, 2020* -
## Algebra

In a batch of 280 water purifiers, 12 were found to be defective. What is the probability that a water purifier chosen at random will be defective? Write the probability as a percent. Round to the nearest whole number percent if necessary. a. 11% b. 13% c.

*asked on May 20, 2020* -
## Physics

if the coefficient of static friction between a 55 kg box and the floor is 0.67 with what minimum horizontal force must it be pulled to get the to crate move

*asked on May 8, 2020* -
## Algebra

What method(s) would you choose to solve the equation? Explain your reasoning. 4x^2-48=0 a. Quadratic formula, graphing; the equation cannot be factored easily since the numbers are large. Selected:b. Square roots; there is no x-term. c. Factoring; the

*asked on April 2, 2020* -
## algebra

The height of a projectile fired upward is given by the formula s = v0t – 16t^2, where s is the height, v0 is the initial velocity and t is the time. Find the times at which a projectile with an initial velocity of 128 ft/s will be 176 ft above the

*asked on March 12, 2020* -
## Math

Log2 (x-6) + log2 (x-4) - log2 X=2

*asked on November 27, 2019* -
## math

the bulletin board in Shain's classroom is 3 1/4 feet by 4 1/2 feet. what is the area of the bulletin board? is this right? 24 1/2 ?

*asked on February 22, 2017* -
## math

write all the possible odd 5-digit numbers using the digits 1,4,7,8 and 0, with the 1 in the ten thousands places.

*asked on August 24, 2016* -
## Physics

Using the following equations as a guide (some may be used, some may not-choose wisely) y1 OR x1= initial position x2 or Y2 =final position V1 or Vi= Initial velocity V2 or Vf- Final velocity a= Acceleration T- time Equation 1.) x2=x1 +vt Equation 2.) v2=

*asked on January 6, 2016* -
## geometry

x^2+2xy-15y^2 is this factorable?

*asked on November 20, 2015* -
## Algebra 1

what is the solution of the following system of equations? 1.) 5x + 7y =3 2x = -3y +1

*asked on February 26, 2015* -
## chemistry

In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 38.0mi/gal , how many liters of gasoline would you need to buy to complete a 142-km trip in Europe? Use the following conversions: 1km=0.6214mi and 1gal=3.78L.

*asked on February 13, 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* -
## 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* -
## 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* -
## algebra

A beauty salon buys bottles of styling gel for $4.50 per bottle and marks up the price by 40%. For what price does the salon sell each bottle?

*asked on October 21, 2014* -
## 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* -
## 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* -
## 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* -
## 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* -
## help with physics

(a) The current through a wire is a steady 2.5 amps. How much current passes through it between t = 0 seconds and t = 4 × 10-4 seconds? (b) The current through a wire is given by I(t) = I0e -at, where I0 = 2.5 amps and a = 6 × 103 s-1. How much electric

*asked on March 4, 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* -
## math

i am a 3 digit number when i am rounded to the nearest hundred i become 300 my hundreds digit is 2 the differance between my ones and tens digits is one my tens digit is my largest digit i am an odd number what 2 numbers can i be

*asked on November 5, 2012* -
## Chemistry

A volume of 40.0 of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the solution if 20.2 of 1.50M H2SO4 was needed? The equation is 2KOH(aq)+H2SO4(aq)--->K2SO4(aq)+2H2O(l)

*asked on July 22, 2012* -
## 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* -
## Chemistry

Suppose you have a supply of the following metals: Fe, Ni,Sc, Cr, Au, K. Which of there could be mixed to make substitutional alloys? Which metals are incompatible for this purpose. Clearly explain why there metals would be incompatible. I am unsure about

*asked on February 10, 2012* -
## Grammar Check

Can you please check this to see if my grammar is correct. Thank you :) Thank you for all that you have done & continue to do, for me. I wouldn't be where I'm at today, if it wasn't for all your help. I feel like I have improved so much, since the first

*asked on December 6, 2011* -
## Stats

A simple random sample will be obtained from a normally distributed population. Find the minimum sample size needed to be 99% confident that the sample standard deviation s is within 5% of the standard deviation. Is such a sample size practical in most

*asked on November 28, 2011* -
## trig

solve csc^2x=3 for all possible solutions

*asked on March 29, 2011* -
## physics

You are designing a centrifuge to spin at a rate of 13,880 rev/min. (a) Calculate the maximum centripetal acceleration that a test-tube sample held in the centrifuge arm 14.6 cm from the rotation axis must withstand. (b) It takes 1 min, 17 s for the

*asked on August 31, 2011* -
## 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* -
## Math, please help!

We are doing a small group project and my group members and I are very confused. The project description: Using the variables provided below, you are working with your group to make a recommendation to the township directors. Currently we mow the grass

*asked on January 6, 2011* -
## Math (important!)

We are doing a small group project and my group members and I are very confused. The project description: Using the variables provided below, you are working with your group to make a recommendation to the township directors. Currently we mow the grass

*asked on January 6, 2011* -
## Elem Algebra

solve the formula for specified variable V=BQT for B B = ____

*asked on December 11, 2010* -
## American History

Compare and contrast the British and American conduct of the Revolutionary War. How did each side propose to win, how realisttic was its assessment of the assessment of the situation and how did this prewar assessment influence the ultimate outcome of the

*asked on October 3, 2010* -
## trig

find all sets of three consecutive odd integers whose sum is greater than 54 and less than 63

*asked on August 25, 2010* -
## 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* -
## 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* -
## chemistry

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

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

A train is 1 mile long and is going through a tunnel a mile long, if the train is going 15 miles per hour, how long will it take 4 the train to get completley through the tunnel?

*asked on August 27, 2007* -
## Algebra

A drug trial is testing the effectiveness of two drugs, If 50 patients are given Drug A, 20 patients are given Drug B, and 100 patients are given a placebo, what is the probability that a patient will NOT be given a placebo? a. 10/17 b. 7/17 c. 5/17 d.

*asked on May 20, 2020* -
## Algebra

In a batch of 280 water purifiers, 12 were found to be defective. What is the probability that a water purifier chosen at random will be defective? Write the probability as a percent. Round to the nearest whole number percent if necessary.

*asked on May 20, 2020* -
## Algebra

A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = mc006-1.jpg0.04xmc006-2.jpg+ 5.8x + 4.9, where x is the horizontal distance, in meters, from the starting point on the roof and y is the

*asked on April 2, 2020* -
## algebra

The height of a projectile fired upward is given by the formula s = v0t − 16t^2, where s is the height, v0 is the initial velocity, and t is the time. Find the time for a projectile to return to Earth if it has an initial velocity of 232 ft/s.

*asked on March 12, 2020* -
## Research

about how many Cherokees died of smallpox in1745

*asked on January 21, 2020* -
## 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* -
## 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* -
## 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* -
## Math

What amount must be set aside now to generate payments of $30,000 at the beginning of each year for the next 13 years if money is worth 5.93%, compounded annually? (Round your answer to the nearest cent.)

*asked on September 29, 2017* -
## 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* -
## 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* -
## math

simply the following (-6*4x^2*y^3/27xy^4)^1/3

*asked on February 16, 2017* -
## math

how many pounds of tea worth $1.54 a pound should be mixed with tea worth $1.70 a pound to make 40 pounds of blended tea to sell at $1.60 a pound?

*asked on February 16, 2017* -
## Government

What are 10 ways to increase voter turnout in the United States? If possible, rovide justification for each one because some of the turnouts are unclear...

*asked on October 21, 2016* -
## 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* -
## Math

A health inspector wants to check compliance with a new city ordinance on meat storage. Since he can only inspect 10 of the 33 stores, he chooses to do a stratified random sample that consists of all 3 of the large chain stores, 4 of the 10 smaller chain

*asked on February 12, 2016* -
## math

if a leaky faucet drips eight ounces of water per minute how many gallons per day is that

*asked on January 16, 2016* -
## geometry

9x^2-25 ? so lost.

*asked on November 19, 2015* -
## geometry

16n^2-9 ?

*asked on November 19, 2015* -
## geometry

also how do you factor 16n^2-9 ?

*asked on November 19, 2015* -
## geometry

how do you factor x^2-100 ?

*asked on November 19, 2015*