# lara

Most popular questions and responses by lara-
## Math

Your long distance telephone providers offers two plans.Plan A has monthly fee of $15 and $0.25 per minute. Plan B has a monthly fee of $20 and $0.05 per minute.Write and solve an equation to find the number of minuts that you must talk to have the same

*asked on September 18, 2016* -
## Chemistry

The amount of energy released by burning a fuel source, measured in energy per mass, is called the fuel value. If all the energy obtained from burning 1.25 pounds of butane (fuel value is 10.85 kcal/g) is used to heat 120.0 kg of water at an initial

*asked on March 22, 2013* -
## English grammar

Select all the statements that apply to the sentence below. She did not believe that he actually knew the rules of bowling. -The sentence contains a gerund.

*asked on July 22, 2015* -
## English grammar

Identify the verbal in this sentence as infinitive, gerund or participle. They cried, but there was none to save them: even unto the LORD, but he answered them not. (Psalm 8:41) I chose infinitive because "to save them" looks like an infinitive that

*asked on July 22, 2015* -
## English grammar

Identify the verbal in this sentence as infinitive, gerund or participle. The old woman slept, not realizing she was no longer poor. I'm not sure if this is a gerund or a participle. "Not realizing" seems to be describing the old woman. I can't see how it

*asked on July 22, 2015* -
## Chemistry

Of the following metals, which ions are most easily reduced? aluminum*** iron mercury potassium

*asked on May 25, 2016* -
## physics

two charges attract each other with a force of 1.5 N. what will be the force if the distance between them is reduced to one-ninth of its original value?

*asked on April 25, 2010* -
## yetf8edfueidcyt87e

a farmer wishes to fence off a rectangular field with 1,000 feet of fencing.if the long side of the field is along a stream, express the area of the field as a function of its width

*asked on October 13, 2012* -
## maths

A water tank has the shape of a rectangular prism of base 50 cm2. This tank is being filled at the rate of 12 liters per minutes. Find the rate at which the height of the water in the water tank increases; express your answer in millimeters per second.

*asked on February 3, 2014* -
## MATHS

Two different schools (A and B) have the same number of pupils. The ratio of the boys in school A and the boys in school B is 2:1 and the ratio of the girls in school A and the girls in school B is 4:5. Find the ratio of the boys in school A to the girls

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

Anger and Snap Judgments Read the article entitled “Anger Can Cause Snap Judgments” and answer the following questions. ANGER CAN CAUSE SNAP JUDGMENTS Anger can make a normally unbiased person act with prejudice, according to a forthcoming study in the

*asked on February 16, 2015* -
## physics

consider three identical metal spheres a b and c. sphere a carries a charge of +5q. sphere b carries a charge of -q. sphere c carries no net charge. spheres a and b are touched together and then separated. sphere c is touched to sphere a and separated from

*asked on April 22, 2010* -
## statistics

investigators at an agricultural research facility randomly assigned equal numbers of chicken to be housed in two rooms. In room #1, chickens experienced normal day/night cycles. In the other room, lights were left on 24 hours a day. The objective was to

*asked on March 24, 2011* -
## Chemistry

three liquids have densities of 1.15g/m, 0.79g/ml, and 0.95 g/ml. When the liquids, which do not mix, are poured into a graduated cylinder, the liquid at the top is the one with a density, in g/ml, of ?

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

three charges are fixed to an x, y coordinate system. a charge of +18 µC is on the y axis at y= +3.0 degree m. a charge of -12 µC is at the origin. last, a charge of +45 µC is on the x axis at x= +3.0 m. determine the magnitude and direction of the net

*asked on April 27, 2010* -
## Maths- yr 5

Tom spent 1/5 of his money and 1/4 of the remainder on a magazine. He had $25.80 left. How much was the magazine? A $5.10 B $6.45 C $8.60 D $7.80

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

The radius of moon is 27% of the earth radius and its mass is 1.2 % of the earth mass find the acc due to gravity on surface of moon?

*asked on September 28, 2018* -
## math

divide 1.702 by .06 gave answer correct to two decimal places.

*asked on February 9, 2013* -
## Business Math

1. Lee Holmes deposited $16,700 in a new savings account at 6% interest compounded semiannually. At the beginning of year 4, Lee deposits an additional $41,700 at 6% interest compounded semiannually. At the end of year 6, what is the balance in Lee’s

*asked on October 29, 2013* -
## statistic

Your professor tells you that if you score an 85 or better on your midterm exam, then you have a 90% chance of getting an A for the course. You think you have only a 50% chance of scoring 85 or better. Find the probability that your score is 85 or better

*asked on September 27, 2016* -
## Statistics

If 5% of electric bulb manufactured by a company are defective find the probability that in a sample of 100 bulbs. (1)None if defective (2) 5 bulbs are defective e -5=0.007

*asked on May 19, 2019* -
## Trig

If cot theta = -12/5 and the terminal side of theta lies in quadrant II find secant theta

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

what is Glucose most likely found in fish, chicken, apples,and olive oil?

*asked on September 11, 2019* -
## algebra

A country's population in 1993 was 171 million estimate the population in 2012 using the exponential growth formula round your answer to the nearest million?

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

In the zinc-copper cell, Zn(s) | Zn^+2(1M) || Cu^+2(1M) | Cu(s), which electrode is negative Cu^+2 Cu(s) Zn(s) Zn^+2***

*asked on May 25, 2016* -
## Trig

Find the exact value of csc 4pi/3 What I have determined thus far: 4pi/3 = 60 degrees sin = square root of 3/2

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

What mass of melamine, C3N3(NH2)3, will be obtained from 159.5 kg of urea, CO(NH2)2, if the yield of the overall reaction is 79.0 %?

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

at noon the temperature is .6.f but the temperature drops 2 degrees per hour for the next few hours?what is the temperature at 4 pm?

*asked on February 23, 2017* -
## MATHS

This bank machine has four rows of buttons 1 2 3 4 5 6 7 8 9 0 Sam has a 4-digit bank number that uses one button from each row. For example his bank number could be 0571. How many different possibilities for Sam's bank number are there? The answer should

*asked on December 1, 2013* -
## MATHS

Carrie and Luke drank 4/5 of a bottle of juice. Carrie drank half as much as Luke. What fraction of the juice did Carrie drink? Answer given is 4/15

*asked on December 3, 2013* -
## Math

While walking from her house to school, Miriam walks at a pace of 5 km/h. When she walks in the hallways at school, she slows down to 3 ½ km/h. If she spent 2 ½ hours walking to and from school and ¾ of an hour walking in the hallways, what was her

*asked on December 20, 2017* -
## statistics

Bill wants to write the equation that demonstrates the model for explaining quarter-life crisis. He is using optimism, locus of control, income, and years since completing college as explanatory variables. Which of the following equations is most

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

Sophie borrowed $2000 at a simple interest rate of 15% for 3 years to repay the loan and has $900 in interest. If Sophie's interest was calculated at the same rate on the balance owing, how much would she have owed after 6 months if she repaid $40 per

*asked on March 17, 2017* -
## MATHS

Donna wants to cut out circular discs of radius 7cm from a cardboard measuring 50cm by 70cm. What is the maximum number of circular discs that can be cut out from the cardboard?

*asked on December 29, 2013* -
## Fluid Mechanics

A cylinder with internal diameter of 5cm and 15 cm high is filled up with an unknown substance. The mass of the cylinder is 4.6 kg which is 300% of the unknown substance mass. Determine the density and the specific gravity of the unknown substance.

*asked on September 21, 2014* -
## Physics

a ball thrown upward with a velocity of 19.6m/s will come momentarily in rest in? Ans 2sec

*asked on October 19, 2018* -
## MATHS

The hot dog cost $2.20 each. Greg sold one hot dog every 2 minutes at a festival. At this rate, how many minutes would it take to sell $110 worth of hot dog? Please help! My result is 100 but the actual correct answers is 25.

*asked on April 21, 2019* -
## Linear Algebra

Demonstrate that t T: P3 -> P3, Tp = p' is a linear function. I know that to demonstrate if something is a linear function I must, check if the sum and multiplication with a scalar is linear. But I am a bit concerned cause when I derivate P3 it will always

*asked on April 10, 2019* -
## capitalization

i have a doubt if "the" should be capitalized in this sentence: Thomas Jefferson wrote the Declaration of Independence for our country.

*asked on August 17, 2010* -
## MATHS

Joyce had some money. She bought a dress, a shirt and a watch. She spent 1/5 of her money on a shirt. The shirt cost $24 less than a dress. The watch cost $102. She was left with 1/4 of the amount of money she had at first. How much money did Joyce have at

*asked on October 8, 2019* -
## chemistry

Determine the concentration of a solution of Mg(NO3)2 given the precipitate formed is 2.97 g and there are 50mL of Mg(NO3)2 and 50 mL of NaOH. Please show all work for each step clearly

*asked on September 18, 2012* -
## Math

Pamela can run 100 meters in 12.5 seconds and Josalin can run 150 meters in 20 seconds. If they both ran a 400 meter race at this rate, how many meters ahead would Pamela cross the finish line before Josalin?

*asked on September 21, 2016* -
## Math Probability problem

Tony has 3 jackets and 2 shirts and 2 pants. He wants to wear three items every day. How many outfits he can choose of the same clues and/or of different clues

*asked on May 15, 2016* -
## chem

0.1802 g sample of a chlorocarbon compound was analyzed by burning in oxygen and collecting the evolved gases in a solution of sodium hydroxide. After neutralizing, the sample was treated with 39.50 mL of a 0.025 M AgNO3. This precipitated the Cl- as AgCl

*asked on April 11, 2012* -
## Physics

A cannon placed at the top of a 100.0 m high cliff fires horizontally to a platoon of Hussars situated initially 1.0 km away from the base of the cliff. At what initial velocity should the cannon shell be fired assuming the hussars are moving with a

*asked on July 10, 2011* -
## grammar

is my capitalization right in this sentence: If you take interstate 10 and travel west, you will see Katy Mills one of the largest malls in Texas.

*asked on August 18, 2010* -
## Awards

What kind of awards do they give out @ a 7th grade/8th award ceremony???

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

an electron and a proton are initially very far apart (effectively an infinite distance apart.) they are then brought together to form a hydrogen atom, in which the electron orbits the proton at an average distance of 5.29 x 10 -11 m. what is EPE final -

*asked on May 2, 2010* -
## Chemistry

Which atom has a change in oxidation number of –3 in the following redox reaction? K2Cr2O7 + H2O + S - - > KOH + Cr2O3 + SO2 Cr^+3 - - > Cr2O7^-2 Fe^+2 - - > Fe^+3 Fe^+3 - - > Fe^+2 Cr2O7^-2 - -> Cr^+3***

*asked on May 25, 2016* -
## MATHS

Mr Wood makes tables with 4 legs, and stools with 3 legs. Nine customers ordered 8 items each. Each order was different. How many legs are needed altogether?

*asked on December 1, 2013* -
## MATHS

24 1c coins are set out in a row on a table Then every 2nd coin is replaced by a 2c coin every 3rd coin is replaced by a 5c coin every 4th coin is replaced by a 10c coin every 5th coin is replaced by a 20c coin every 6th coin is replaced by a 50c coin and

*asked on November 19, 2013* -
## social studies

Theodore Roosevelt wanted to build a canal in Central America. Why was there opposition to Roosevelt's plan?

*asked on January 20, 2010* -
## chem

The amount of iron in a meteorite was determined by a redox titration using KMnO4 as the titrant. A 0.4408 g sample was dissolved in acid and the liberated Fe3+ quantitatively reduced to Fe2+. Titrating with 0.0220 M KMnO4 requires 41.38 ml to reach the

*asked on April 11, 2012* -
## chemistry

You can temporarily receive relief from acid indigestion by using an antacid that contains a base. Why is it not a good idea to use an antacid routinely? (2 reasons)

*asked on July 23, 2016* -
## Trig

Find all values of theta where 0degrees

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

A light beam containing red and violet wavelengths is incident on a slab of quartz at an angle of incidence of 50.0°. The index of refraction of quartz is 1.455 at 660 nm (red light), and its index of refraction is 1.468 at 410 nm (violet light). Find the

*asked on April 1, 2013* -
## Ph CHEM

A solution is found to contain 1 x 10-4 OH− ions, determine the pH of this solution. I did this problem and got 4 but it is not going in as correct. -log(1*10^-4)=4

*asked on November 27, 2012* -
## physics

A stone is projected vertically upward with a speed of 20 m/s. a. What is its velocity at the end of 2s? b. What is the height reacted after 2s?

*asked on February 3, 2016* -
## MATHS

The ratio of the number of males to the females at a performance is 5 : 7. 1/4 of the males and 3/4 of the females are children. What is the ratio of the number of adults to children? Express your answer in simplest form.

*asked on December 30, 2013* -
## Chem- Percent Yield

When HgO is heated, it decomposes into elemental mercury and diatomic oxygen gas. If 42.9 g of Hg is obtained from 70.1 g of the mercuric oxide, what is the percent yield of the reaction?

*asked on October 11, 2012* -
## 11th grade

Hello there i am writing a book and i would like to know how many subjects does an eleventh grader have per day. please reply as soon as possible. thank you very much. P.S: This question is meant to be answered by an american individual due to various

*asked on November 6, 2009* -
## Chemistry

Q49 One litre of solution contain 30g acetic acid the active mass of acetic acid is? Ans 1.0mol/L

*asked on September 30, 2018* -
## maths

Alan is using matchsticks to make isosceles triangles. Isosceles triangles have at least two sides the same length.How many different single isosceles triangles can he make with 45 matchsticks, using all the matchsticks each time? The answer is 11, but I

*asked on November 6, 2013* -
## chemistry

A basic buffer is prepared by adding 0.3310g of NH4Cl to 1.00L of 0.2088 M NH3. Kb (NH3) = 1.8x10-5.

*asked on March 21, 2012* -
## Political Science: American Government

Can you please tell me if these are correct? Thank you! Generally, people with lower incomes, less education, and lower job status: a. are more conservative in their political opinions. b. are more liberal in their political opinions. c. are more moderate

*asked on March 11, 2011* -
## chemistry

A sample of argon gas occupies a volume of 950 mL at 25.0°C. What volume will the gas occupy at 50.0°C if the pressure remains constant?

*asked on June 12, 2010* -
## Math

I NEED URGENT HELP WITH THIS QUESTION!!!! Question: The terms of a geometric sequence are 4x+1, x+4, and 10-x. Determine the value of x.

*asked on January 22, 2019* -
## Probability

Part A: The difference A\B of two subsets A and B of is the set A∩( \B) of all points of which are in A but not in B. Show that if A, B ∈ F , then A \ B ∈ F . Part B: The symmetric difference A △ B of two subsets A and B of is defined to be the set

*asked on October 9, 2018* -
## Trig

Find all values of theta where 0degrees

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

walking at 3/4 of his usual speed, a man is late by 2.5 hrs. What is he usual time?

*asked on March 20, 2014* -
## Grade 5 Maths

A coin box contained some twenty-cent and fifty-cent coins in the ratio 4:3. After 20 twenty-cent coins were taken out to exchange for fifty-cents coins of the same value and put back in the box, the ratio of the number of twenty-cent coins to the number

*asked on January 19, 2014* -
## college geometry

if triangle mnp approximate triangle srt with proportionality factor k, show that if ma and sb are altitudes of the given triangles, then ma = ksb in

*asked on October 11, 2012* -
## chem

An experimental alloy contained by copper and tantalum. 3.7950 g of the alloy was dissolved and analyzed gravimetrically. The copper was precipitated and weighed as CuO, a mass of 0.1805 g was obtained. Calculate the %w/w Cu in the alloy. [Answer in 2

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

A cart of 2kg travellin @6m/s collides wit another cart of mass of 0.4kg travellin in the same direction @ 2m/s. The 2kg cart bounc off and !@#$%^&inues wt 3m/s in the same direction after impact.calculate the velocity of the 0.4kg trolley afta collision

*asked on June 7, 2011* -
## grammar

im confused if "earth" should be spelled with an uppercase. i would think so but just wanna make sure Hawaii has some of the most beautiful beaches on the earth. thanks :)

*asked on August 18, 2010* -
## Texas History

What issues and events caused multiple claims to Texas?

*asked on September 15, 2016* -
## physics

If you do 500J of work to elevate a bucket of water, what is its gravitational potential energy relative to its starting position? 500*10=5,000 5,000/500=10

*asked on March 13, 2015* -
## math(urgent)

What is the value of the variable cost ? If the break even point is $ 130, the fixed cost is $ 330, selling price per unit is $ 25,and unit of sell is $50. (3 marks)

*asked on June 22, 2014* -
## MATHS

A pie is cut into two equal parts. The first part of the pie is shared between Abdul and Kate. Kate has 3 times as much as Abdul. The second part of the pie is shared between Sarah and Ron. Ron has 3/5 as much as Sarah. The mass of Sarah's share of the pie

*asked on November 7, 2013* -
## chemistry

what does it mean to draw the chemical structure of dichloromethane? does this just mean the 2d structure?

*asked on February 20, 2012* -
## math

Is (5,2) a solution of 4x-2y=-6 I said no, am I right? I am working on another problem where they want to know if this system of equations is perpendicular or parallel or neither,5x+4y=2, 4x-5y=4 I said neither. Is this right? I am to solve by using

*asked on January 8, 2010* -
## economic history

Could someone give me a short summary/bullet of the economic significance of the great voyages of discovery in particular for venice/portugal? Thanks xox

*asked on December 5, 2009* -
## Chemistry

Q35 5 mol of H2O contain no of OH ions ? Ans 3.10×10^24ions

*asked on September 30, 2018* -
## math

a photograph has an area of 80sq inches.the length of the photo is 1 1/4 width. what is the following dimension of the photgraph?

*asked on February 6, 2017* -
## Fluid Mechanics

A cone with base radius of 5 cm and height of 20 cm is filled with oil with specific gravity of 0.85. Determine the dimension of cubic steel which its weight is equivalent to the oil weight. Steel Specific Gravity is 7.1

*asked on September 21, 2014* -
## MATHS

Mrs Koh bought some pens, files and erasers. The ratio of the number of pens to the number of files to the number of erasers she bought was 1 : 2 : 3. The cost of each pen and eraser is $2.50 and $0.50 respectively. If she spent $60 on the pens and the

*asked on December 30, 2013* -
## MATHS

Stacey spent 1/ 6 of her money on a purse and 7/12 more money on a bag than on the purse. What fraction of her money did she spend?

*asked on December 19, 2013* -
## Novel 1984

1)When Regardless of what the ministry of love did to you what one thing according to Winston could they never do in the book 1984? 2)describe the event that promoted winston's mother disappearance 3)how does julia give winston hope about the future when

*asked on December 14, 2011* -
## Math

Did I get the right answer simplify: -6[-28-(20-48)] I got that it simplified to 0 Am I right?

*asked on January 7, 2010* -
## Chemistry

Q31 How many moles are present in 20 cm^3solution of 0.05M HCL? Ans 10^-3mol

*asked on September 30, 2018* -
## Chemistry

Q54 The ratio of the rate of diffusion of two gases is1:3 then ratio of the molecular wieght? Ans 9:1

*asked on September 30, 2018* -
## Physics

Change on each plate of a parallel plate capacitor is 6microC and capacitance is 4 microf what is p.d between plates? Ans 1.5 volt

*asked on September 30, 2018* -
## Chemistry

How many mole of O2 are needed for complete combustion of two mole of butane C4H10? ANS 13

*asked on September 30, 2018* -
## Math

what does skip half an increment mean in graphs

*asked on October 3, 2016* -
## Chemistry

If there are 5,280 ft=1.00 mile ,how many miles are in 50,000 ft?

*asked on August 5, 2015* -
## MATHS

Ken and Sam shared some marbles. The ratio of the number of marbles Ken has to the number of marbles Sam has is 5:3. If Ken's marbles increases by 15%, what percentage of Sam's marbles must be decreased so that the total number of marbles they have

*asked on January 1, 2014* -
## MATHS

This question has mentioned 'pattern of numbers', does that means not just do simple calculation from left to right OR there is a fast way to solve this question, please help. Look at this pattern of numbers. 7x 11 x 13 x 1 = 1001 7x 11 x 13 x 2 = 2002 7x

*asked on October 21, 2013* -
## Chemistry

If 31.00 mL of a dilute solution of lime water (calcium hydroxide) required 10.10 mL of 0.246 M hydrochloric acid solution for neutralization to a methyl red end point, calculate the molarity of the lime water. Can you please explain how to do it? Do I use

*asked on April 2, 2011* -
## algebra

Is (5,2) a solution of 4x-2y=-6 I said no, am I right? I am working on another problem where they want to know if this system of equations is perpendicular or parallel or neither, I said neither. Is this right? I am to solve by using elimination: 2x+3y=1,

*asked on January 8, 2010* -
## math

I don't know how to rewrite an expression using rational exponent notation. The problem is shown as ^3 square root of 11.

*asked on May 20, 2008*

## Pages

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