# lala

Most popular questions and responses by lala-
## calculus

a boat leaves a dock at 2:00 pm and travels due south at a speed of 20 km/h. Another boat has been heading due east at 15 km/h and reaches the same dock at 3:00 pm. at what time were the two boats closest together

*asked on November 14, 2011* -
## math

what should you call a man with a clamp

*asked on March 28, 2011* -
## math

why did they try to build a house on orgo's head?

*asked on February 17, 2011* -
## Calculus

A fence is 1.5m high and is 1m from a wall. A ladder must start from the ground, touch the top of the fence, and rest somewhere on the wall. Calculate the minimun lenght of the ladder. I drew a diagram and i ended up with a right angle triangle. i made the

*asked on April 10, 2010* -
## Chemistry

A scuba diver’s tank contains 0.29 kg of O2 compressed into a volume of 2.3L. A)calculate the gas pressure inside the tank at 9 Celsius. B) what volume would this oxygen occupy at 26 Celsius and 0.95atm? Answer is a)91atm B) 2.3 x 10^2 L Trying to find

*asked on January 18, 2018* -
## English

In the Night The Bed Fell, what is the father's reaction to the scene he discovers when he opens the attic door? He is ready to chase a burglar He's worried someone's been hurt He wants to know what's happened He's glad that everyone's all right My answer

*asked on September 19, 2016* -
## English (Langue Arts)

What does the following quote from “The cask of Amontillado “ reveal about what Montresor wants his servants to do ? "I had told them that I should not return until the morning and has given them explicit orders not to stir from the house. These orders

*asked on May 20, 2016* -
## Romeo and Juliet (Check answers pplz hurry)

Could you please check these answers from Act 1 (Review it's only 5 questions) 1.What warning does the Prince issue to the Capulets and Montagues? Answer: The Prince warns to the Capulet's and Montague's is if anyone fights they will be put to death. 2.

*asked on March 12, 2009* -
## Chem

a 4.369g sample of metal is placed in a flask. water is added to the flask and the total volume in the flask is read to be 126.4ml. the mass of the water, flask, and metal is 268.5g. if the mass of the flask is 139.3g and the density of water is 1.000g/ml,

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

Gallium melts just above room temperature and is liquid over a very wide temperature range (30-2204 °C), which means it would be a suitable fluid for a high-temperature barometer. Given its density, daa = 6.0 g/cm, what would be the height of the column

*asked on January 17, 2018* -
## Social studies

How was transportation standardized under the Qin? A roads were the same width B Carriages were the same height C Everyone paid the same road tax**** D Axles of carriages were the same length This is the Unification of China quiz Can someone check my

*asked on December 6, 2018* -
## Statistics

1. A local community college determines the probability that a student will reenroll for a second year is 0.91. A representative surveys 100 random first year students and asks them if they will be enrolling for the next year. What is the probability that

*asked on January 15, 2019* -
## physics

A car with a 65cm diameter wheel travels 3.0km. How many revolutions does the wheel make in this distance?

*asked on November 14, 2017* -
## ap history

when did american economic institutions began to be shaped in a capitalist framework? A.during the colonial period B.during the federalist era C.during the jacksonian era D.during the civil war E.during the late 1890s

*asked on September 26, 2010* -
## Financial Mgmt.

Nachman Industries just paid a dividend of D0 = $1.75. Analysts expect the company's dividend to grow by 30% this year, by 10% in Year 2, and at a constant rate of 5% in Year 3 and thereafter. The required return on this low-risk stock is 9.00%. What is

*asked on March 5, 2013* -
## chemistry

how to prepare and calculate 10%,20% and 30% of phosphoric acid from the concentrated? Meaning that if 10% = 10%phosporic acid+90% of water. let say i want to prepare in 250ml volume.

*asked on January 29, 2013* -
## physicss

The oil drain plug on a car's engine has just been tighten to a torque of 25m*N. a) if a 0.15m long wrench is used to change the oil, what is the minimum force needed to loosen the plug? b) due to limited workspace, it will be necessary to crawl under the

*asked on December 5, 2017* -
## English- The scarlet Letter

what rhetorical device does hawthrone use to reveal hester prynne's past? What do we learn about her?

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

What were the headlines after a mad scientist trained two eggs to attack a candy store with sharp sticks?

*asked on January 12, 2011* -
## physics

a cyclist travel a distance of 4km from P to Q then moves the distance of 3km at right angle to PQ. find its resultant displacement graphically?

*asked on July 11, 2011* -
## physics

A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits another kid 2.1 away square in the back, at a point 0.91 above the ground.

*asked on February 10, 2012* -
## Maths

A box with no top is to be built by taking a 6'' - by - 10'' sheet of cardboard and cutting x - in. squares out of each corner and folding up the sides. Find the value of x that maximizes the volume of the box.

*asked on September 19, 2010* -
## World History

How did the Europeans establish and maintain their trading empires with Asia? ? idk help

*asked on January 9, 2011* -
## chemistry

A thimbleful of water at 100 deg C has a higher temp than a swimming pool full of water at 20 deg C, but the pool has more thermal energy than the thimble. Explain why this is possbile?

*asked on April 26, 2010* -
## physics

help please?? A bocce ball with a diameter of 6.00 cm rolls without slipping on a level lawn. It has an initial angular speed of 2.35 rad/s and comes to rest after 2.50 m. Assuming constant deceleration, determine (a) the magnitude of its angular

*asked on December 1, 2017* -
## biology

in japan, native honeybees have evolved an effective defense strategy against giant Japanese hornets. imported European honeybees, however, are unable to defend themselves. explain this in terms of coevolution?

*asked on March 29, 2010* -
## Science

A scientist is studying a new chemical he hopes will prevent insects from eating raspberry bushes. he sprays the chemical on a raspberry bush and places it with an unsprayed blackberry bush and some insects in a sealed room. He observes insects eating the

*asked on September 27, 2018* -
## Social studies

What was the purpose of the Great Wall? A to separate warring states B to keep out nomads to the north*** C to standardize Chinese roads D to make trade and transportation easier (*** my answer) Please NO answers please just check my answer or send study

*asked on December 6, 2018* -
## mathematical modeling

Person A opens an IRA at age 25, contributes $2000 per year for 10 years, but makes no additional contributes thereafter. Person B waits untill age 35 to open an IRA and contributes $2000 per year for 30 years. There is no initial investment in either

*asked on August 13, 2011* -
## Finance

Suppose you borrowed $15,000 at a rate of 9% and must repay it in 5 equal installments at the end of each of the next 5 years. What is the outstanding balance of the loan at the end of second year?

*asked on January 13, 2017* -
## Physics

A 1500 kg automobile travels at a speed of 105 km/h along a straight concrete highway. Faced with an emergency situation, the driver jams on the brakes, and the car skids to a stop. (a) What will be the car's stopping distance for dry pavement (µ = 0.85)?

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

Calculate the pH of 0,3g calcium hydroxide dissolved in water to give 500ml solution.

*asked on October 26, 2014* -
## Matsci

If the absolute pressure at the bottom of the ocean is 120 kPa, how deep is the water at this point

*asked on December 5, 2015* -
## Calculus

A certain radioactive material decays exponetially. The percent, P, of the material left after t years is given by P(t)= 100(1.2)^-t a)Determine the half life of the substance

*asked on April 13, 2010* -
## Science

the energy an object has due to it's motion is called a what?

*asked on March 18, 2015* -
## physics

a large chunk of ice with mass 15 kg falls from a roof 8 m above the ground . find the kinetic energy of the ice when it reaches the ground

*asked on February 6, 2012* -
## algebra

Write the number 2.4 in the form , using integers, to show that it is a rational number

*asked on February 5, 2018* -
## Physics

the cartesian coordinates of a point on a circle are (1.5m, 2.0m). what are the point;s polar coordinates (r, degree) of this point?

*asked on November 7, 2017* -
## biology

in a relationship that is an example of commensalism, would the species that is neither helped nor harmed evolve in response to the other species?

*asked on March 29, 2010* -
## math

20. A scale drawing of a town park has a scale of 5 in : 100 ft. What is the actual length of each foot in the drawing? (1 point)

*asked on December 2, 2011* -
## calculus

Two roads intersect at an angle of 48º. A car and truck collide at the intersection, and then leave the scene of the accident. The car travels at 100 km h down one road, while the truck goes 80 km h down the other road. Fifteen minutes after the accident,

*asked on April 15, 2010* -
## Physics

A 45kg sled is coasting with constant velocity at 3.0m/s over a patch of smooth and level ice. It enters a very rough section of ice that is 11m long in which the force of friction is 15N. With what speed will the sled emerge from the rough ice?

*asked on January 5, 2012* -
## physical science

a sled and rider with a combined weight 60kg are at rest on the top of a hill 12m high. what is their total energy at the top of the hill?

*asked on September 26, 2011* -
## calculus

Three ships are at points P, Q, and R such that PQ=2km PR=7 km, and

*asked on April 15, 2010* -
## Social studies

Does anyone have the answers to the quiz I need to check my answers Thanks it would help a lot

*asked on December 6, 2018* -
## Social Studies

1. Which river helped Rome grow and expand? A. Tigris

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

A clump of soft clay is thrown horizontally from 30.63 m above the ground with a speed of 30.0 m/s. Where is the clay after 3.8 s? Assume it sticks in place when it hits the ground

*asked on January 27, 2011* -
## chem

calculate the number of moles in 0.00655 g of antimony

*asked on March 16, 2009* -
## physics

When bunting, a baseball player uses the bat to change both the speed and direction of the baseball. (b) The baseball has a mass of 0.11 kg; its speeds before and after the bunt are 16 m/s and 12 m/s, respectively; and the bunt lasts 0.023 s. What is the

*asked on October 17, 2017* -
## World History

What factors contributed to Islam's spread to south and southeast Asia?

*asked on November 8, 2010* -
## Physics

the cartesian coordinates of a point on a circle are (1.5m, 2.0m). what are the point;s polar coordinates (r, degree) of this point?

*asked on November 7, 2017* -
## Physics

Suppose a crate of mass 2.8 kg is placed on the plank in the figure below at a distance 5.1 m from the left end. Find the forces exerted by the two supports on the plank. (The mass of the plank is 12.0 kg.) Left Support N Right Support N The plank set on

*asked on March 6, 2011* -
## math

kelly subtracted 2.3 from 20 and got 17.7 explain why this answer is reasonable

*asked on October 26, 2010* -
## Science

The rider of a ferris wheel moves at a rate of 0.18 m/s2. If the rider is 5.0 m from the center of the ferris wheel, What is his/her Velocity? Can't figure out if the RADIUS and RATE are the same and Which one is the radius/rate?

*asked on June 23, 2015* -
## CHEMISTRY

reaction KMnO4+ EDTA(ethylenediaminetetraacetic acid) + MnSO4(s)---> MnCl3 (Violet/Rose solutions) note: Mn is being reduced. a) What is the catalyst in this reaction above? b)What is the role of EDTA in the reaction above

*asked on February 14, 2010* -
## chem

Calculate the number of kJ released for the reaction shown below, if you begin with 52 grams of fluorine (F2), and the ΔH = -542 kJ. H2(g) + F2(g) → 2 HF(g)

*asked on September 29, 2015* -
## Math

1.) In the following problem, write the first five of the terms of the arithmetic sequence. a1=16.5 d=0.25 2.) Find a the correct formula for the an for the arithmetic sequence. a1=-1 d=5

*asked on April 16, 2015* -
## chem

1) how many molecules are present in 1.5 moles of NaCl? 2) how many atoms of chlorine are in 19.0 grams of MgCl2?

*asked on May 29, 2014* -
## calc 3

1. Evaluate the given integral by making an appropriate change of variables, where R is the region in the first quadrant bounded by the ellipse 36x^2+25y^2=1. L= double integral R (4sin(144x^2+100y^2) dA. 2. Use the given transformation to evaluate the

*asked on November 4, 2014* -
## Finance

EMAR expects to receive $2,000 per year for 10 years and $3,500 per year for the next 10 years. What is the present value of this 20-year cash flow? Use an 7% discount rate.

*asked on January 13, 2017* -
## Calculus

4. Find the dimensions of the largest isosceles triangle having a perimeter of 18 cm. Answer ( all sides 6 cm) i really need help with coming up with the equation of the function before solving its derivative and making it equal zero so far i know 2x+y=18

*asked on March 9, 2010* -
## algebra

A car travels down the highway at speeds between 50 miles per hour and 65 miles per hour. If the car travels for 4 hours, write an expression that represents the distance, d, the car has travelled.

*asked on November 1, 2013* -
## Romeo and Juliet Help (24 hours and no response)

I posted questions yesterday and it's on the next page. Could you please check them and get back with me thanks.

*asked on March 13, 2009* -
## algebra

A motorboat traveling a distance of 225 miles in 5 hours while traveling with the current. Against the current, the same trip took 9 hours. Find the rate of the boat in calm water and the rate of the current. rate of boat___ mph rate of current___ mph

*asked on November 27, 2014* -
## Physics

An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. How far does the box travel from

*asked on October 29, 2012* -
## Physics

An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the cable is 350N and the box accelerates at 1.2m/s^2[forward] for 5.0s. The cable breaks and the box slows down and stops. How far does the box travel from

*asked on October 29, 2012* -
## Physics

when driving at night at a speed of 80 km/hr, a deer suddenly appeared and frozen in your head light. The distance between your car and the deer was 45 meters at the moment you start to break your car as hard as possible in order to avoid the accident

*asked on September 1, 2012* -
## chemistry

Testtube B: Has a solution of KMnO4 + NaOH+ NaHSO3----> K2MnO4 (green coloured-solution)+H2O+Na2SO4 If too much HSO3^1- was added to this solution above, what would be the resulting colour and why

*asked on February 14, 2010* -
## Math

Find the exact value: cos(pi/16)cos(3pi/16)-sin(pi/16)sin(3pi/16)

*asked on January 29, 2015* -
## Science

16g of bone displaced a volume of 8mL of water.what is the density of the bone?

*asked on August 24, 2011* -
## World History

How did religion and trade connect Africa to a larger world; with what results?

*asked on November 8, 2010* -
## chemistry

a galvanic cell: A copper electrode is placed in a Cu(NO3)2 electrolyte. An iron electrode is placed in a Fe(NO3)3 electrolyte. a) What will happen to the voltage if sodium sulfide solution was added to the copper solution(I found that CuS(solid

*asked on February 21, 2010* -
## physics

A car with a 65cm diameter wheel travels 3.0km. How many revolutions does the wheel make in this distance?

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

A car with a 65cm diameter wheel travels 3.0km. How many revolutions does the wheel make in this distance?

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

Suppose a firm has a constant marginal cost of$10 the current price of the product is $25, and at that price, it is estimated that the price elasticity of demand is -3.0. Is the firm charging the optimal price for the product? Demonstrate how you know.

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

What is the unit cell of calcium sulfide? anti-fluorite cesium cholride diamond fluorite graphite rutile sodium chloride zinc blende

*asked on May 2, 2011* -
## math

ABC is a sector of a circle with radius R cm and centered at C. The arc DE lies on a circle also centered at C.If the arc DE divides the sector ABC into two regions of equal area. Find the length of the interval CD in terms of R.

*asked on October 27, 2017* -
## Social Studies 6 B

1. The Saraswati River was a twin to which other river? A. Ganges. B. Tigris. C. Himalaya. D. Indus. 2. Glacial runoff and ________ provide the water for the large rivers of India. A. underground wells. B. melting snow. C. rain. D. steam. 3. Saraswati

*asked on January 26, 2017* -
## English

What does this quote mean? “Stars got tangled in her hair whenever she played in the sky.”

*asked on January 12, 2014* -
## Physics

A lightning bug flies at a velocity of 0.25 m/s due east toward another lightning bug seen off in the distance. A light easterly breeze on the bug at a velocity of 0.25 m/s. What is the resultant velocity of the lightning bug? I drew the .25 east but would

*asked on September 20, 2011* -
## English

I'm writing a Precis of a book and it asks to to put the literary period and country I tried to look but I still don't really understand. Thanks

*asked on January 5, 2011* -
## chemistry

If a mole of hydrogen gas (H2) contains 6.02 x 10^23 molecules, how many molecules are there in 10.0 moles of hydrogen gas? Answer 60.20 x 10^23 molecules 6.0 x 10^23 molecules 6.02 x 10^20 molecules 6.02 x 10^24 molecules None of these is correct. would

*asked on September 28, 2010* -
## chemistry

defie le chatelier's principle and the role equilibrium plays in the reduction of stress

*asked on January 22, 2010* -
## chemistry

Write the complete balanced molecular, ionic,and net ionic equations for the reaction of nickle II chloride + sodium phosphate. Which product,if any, is a precipitate?

*asked on December 3, 2009* -
## edcation

When a person categorizes someone else as belonging to a certain group based on assumptions, this is called

*asked on July 6, 2018* -
## math

the plan of a shopping complex is drawn to a scale of 1:400. A supermarket on the plan occupies an area of 0.25m square, calculate its actual area in hectares

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

For 30 randomly selected Rolling Stones concerts, the mean gross earnings is 2.37 million dollars. Assuming a population standard deviation gross earnings of 0.52 million dollars, obtain a 99% confidence interval for the mean gross earnings of all Rolling

*asked on December 1, 2015* -
## Math

A spherical balloon is being inflated. Estimate the rate at which its surface area is changing with respect to the radius when the radius measures 20 cm.

*asked on September 22, 2013* -
## college physics

Two cars of equal mass are traveling as shown in the figure below just before undergoing a collision. Before the collision, one of the cars has a speed of 19 m/s along +x, and the other has a speed of 31 m/s along +y. The cars lock bumpers and then slide

*asked on February 24, 2011* -
## US History

Why do you think freedom and independence were so important to the colonists?

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

What is an essay-style question, and how would I write one about a book I read? I don't have to answer the question

*asked on November 2, 2010* -
## Math help

A small recording studio that produce its own records is able to press 100 records a day for a profit of $3.60 per record. If a more expensive process is used, production can be increased, but the profit per record diminishes by 2 cents for each additional

*asked on January 12, 2016* -
## Physics

two hundred fifty grams of iron is heated from 27 degree Celsius to 300 degree Celsius . how much ice can be melted and raised to a temperature of 27 degree Celsius by hot iron?

*asked on November 17, 2013* -
## chem

When saccharin is added to pure water, the freezing point of the resulting solution drops to -5.0C, Calculate the freezing point depression of the aqueous saccharin solution. Note: freezing point of pure water is O.0C... Stuck thanks so much!

*asked on January 16, 2013* -
## Physics

how can the equilibrant of two or more concurrent forces be found

*asked on October 2, 2011* -
## Physics

A lightning bug flies at a velocity of 0.25 m/s due east toward another lightning bug seen off in the distance. A light easterly breeze on the bug at a velocity of 0.25 m/s. What is the resultant velocity of the lightning bug? I drew the .25 east but would

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

a driveway is 162 feet long, 12 feet wide, and 6 inches deep. how may cubic yards of concrete will be required to lay the driveway? and pease explain answer

*asked on March 10, 2009* -
## Maths

Construct a parallelogram AB is 8cm ABC is 120 degrees and BC is 5cm

*asked on May 11, 2018* -
## physics

a car travels at 25m/s on a slick road takes 4 second to come to a complete stop. what was the car's average acceleration over 4 second?

*asked on November 10, 2016* -
## accountung

a fixed mo fee of 22.00 up to 510 min. then .05 per min thereafter if i use less than 510 min i still pay 22.00 per month based on 100 min/ 240 min. 540 min.

*asked on May 10, 2016*