# LARA

Popular questions and responses by LARA-
## 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* -
## 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* -
## 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

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* -
## Physics

a current of 3 amp is passing through a galvanometer if a high rasistance is connected in series to it the total current that will pass through the resistance will be? Ans 15 amp

*asked on October 20, 2018* -
## 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

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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## Trig

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

*asked on February 13, 2016* -
## 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

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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## Trig

Find all values of theta where 0degrees

*asked on February 13, 2016* -
## 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

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* -
## 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* -
## 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* -
## 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* -
## 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* -
## Trig

Find all values of theta where 0degrees

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

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

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

The sum of three numbers is 1313. The sum of two of the numbers is 450. What is the third number?

*asked on November 20, 2013* -
## 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* -
## BIO

If 10 DNA template molecules are used and 20 cycles of PCR, how many copies of a template would be amplified? I am pretty sure I cannot use 2^n (n equals the number of amplification cycles)because I don't have a single molecule of starting DNA template.

*asked on April 2, 2013* -
## math

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

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

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* -
## 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* -
## 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* -
## 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* -
## Physics

Two point charges qA=-6nC and qB are placed in vacuum. The charge qA is at a distance of 12cm from a point D. The charge qB is at distance 6cm from D. The resultant electric field vector Et created by the two charges at D is along x axis and makes 30

*asked on February 16, 2020* -
## science

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

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

Q60 The radius of 4rth orbital of an atom if bohrs radius is 0.529A will be? Ans 8.4A

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

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

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

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

*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* -
## Physics

Q85 three resistor are connected in parallel total resistance is 5 ohm if p.d across first resistance is 20V then the potential diff of 2nd resistance will be I1=10A,I2=200A,I3=15A?

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

Q69 Which of torque given below is required to change the angular momentum flywheel from 15kgm_2/s to 150kgm_2/s during a time interval of 5 sec?

*asked on September 29, 2018* -
## 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 29, 2018* -
## Maths

The difference between the two digits of a two digit number is 2. If the digits swap places,the number is 18 less than the original number. What is the original number?

*asked on August 3, 2017* -
## 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* -
## 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* -
## 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* -
## Zoology

Azaleas are flowering shrubs that produce numerous colorful blossoms. Assume that a single gene determines the color of the flowers, and only two alleles for that gene exist. Individuals that are homozygous for the first allele have yellow flowers and

*asked on December 11, 2016* -
## Math

what does skip half an increment mean in graphs

*asked on October 3, 2016* -
## 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* -
## Texas History

What issues and events caused multiple claims to Texas?

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

A community park wants to place a rectangular billboard to inform guests of their new attractions. Suppose the length of the billboard to be placed is 5m longer than its width and the area is 500m2. What will be the length and the width of the billboard?

*asked on July 9, 2016* -
## 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* -
## Chemistry

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

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

Johnie has 3 Jackets (J1, J2 and J3) and 2 shirts (S1, S2) and 2 Trousers (T1, T2). He wants to wear 3 pieces of clothes daily. what should he choose if a) same clues or b) different clues

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

a bullet with mass 0.281 kg is fired from a rifle. It stick into a block of wood with a mass of 17.8 that was at rest. The block/bullet combo moves at 3 m/s. What was the initial velocity of the bullet?

*asked on March 20, 2016* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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

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* -
## MATHS

4 girls shared a pizza equally for lunch. If one of them gave away 1/3 of her share, what fraction of the pizza had she left? 1. 1/12 2. 1/6 3. 1/4 4. 2/3

*asked on January 26, 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* -
## 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

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

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* -
## 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* -
## 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

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

The storekeeper found that if he removed the apples from his box either 2,3,4,5 or 6 at a time there was always one left over. However, if he removed the apples 7 at a time there was no apples left. If the box holds 500 apples, how many apples does the

*asked on November 27, 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* -
## 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* -
## MATHS

lf you added a fifth of one and a quarter to one and a quarter, what would the answer be ? ..... The answers is 1 1/2 have tries 0.2 + 0.25 + 0.75 = 1.20 or 1 1/5 ???? 0.2 + 0.75 + 1 + 0.25 = 2.20 ??? Please help!

*asked on November 1, 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* -
## 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* -
## physics

A constant force of 58.3 N, directed at 31.7 degrees form horizontal, pulls a mass of 11.9 kg horizontally a distance of 2.77 m. Calculate the work done by the force.

*asked on October 20, 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* -
## 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- 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* -
## 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*

## Pages

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