# LARA

Popular questions and responses by LARA
1. ## 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

2. ## 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

3. ## Chemistry

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

4. ## 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.

5. ## 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

6. ## 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?

7. ## 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

8. ## 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

9. ## 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

10. ## 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

11. ## capitalization

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

12. ## 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.

13. ## Trig

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

14. ## 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

15. ## 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.

16. ## 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

17. ## 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

18. ## 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

19. ## 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?

20. ## 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

21. ## Trig

Find all values of theta where 0degrees

22. ## 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?

23. ## 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

24. ## 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 %?

25. ## Physics

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

26. ## 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

27. ## 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)

28. ## Trig

Find all values of theta where 0degrees

29. ## Trig

Find all values of theta where 0degrees

30. ## Chemistry

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

31. ## 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

32. ## 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

33. ## 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

34. ## 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.

35. ## MATHS

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

36. ## 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

37. ## 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.

38. ## math

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

39. ## 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

40. ## 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

41. ## 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

42. ## 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

43. ## 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,

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

45. ## 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

46. ## science

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

47. ## 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

48. ## 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.

49. ## 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

50. ## 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.

51. ## 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

52. ## Chemistry

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

53. ## Chemistry

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

54. ## Chemistry

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

55. ## Chemistry

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

56. ## 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

57. ## Chemistry

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

58. ## 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?

59. ## 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?

60. ## 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?

61. ## 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?

62. ## 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

63. ## 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?

64. ## 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?

65. ## 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

66. ## Math

what does skip half an increment mean in graphs

67. ## 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?

68. ## Texas History

What issues and events caused multiple claims to Texas?

69. ## 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?

70. ## 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***

71. ## Chemistry

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

72. ## 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***

73. ## 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

74. ## 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

75. ## 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?

76. ## 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?

77. ## 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 ?

78. ## 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.

79. ## 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

80. ## 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)

81. ## MATHS

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

82. ## 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

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

84. ## 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

85. ## 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

86. ## 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?

87. ## 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?

88. ## 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?

89. ## 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

90. ## 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

91. ## 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

92. ## 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

93. ## 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!

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

95. ## 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

96. ## 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.

97. ## 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

98. ## 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

99. ## 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?