# ruth

Popular questions and responses by ruth
1. ## Maths

Two boats A and B left a port C at the same time on different route .B travelled on a bearing of 150 degree and A travelled 8km and B had travelled 10km ,the distance between the Two boats was found to be 12km .calculate the bearing of A's route from C.

2. ## Pre calc

evaluate the expression under the given conditions. cos(θ − ϕ); cos(θ) = 5/13, θ in Quadrant IV, tan(ϕ) = − square root15,ϕ in Quadrant II Anyone know how to do this I have never been this confused in my life

3. ## Geography

What is the relation between geography and chemistry

4. ## maths

Three bags of wheat,two bags of corn, and one bag of oats weigh the same as one bag of wheat,one bag of corn and five bags of oats,if two bags of corn and one bag of oats weights 25 pounds and one bags of corn weights 10 pounds,How much does one bag of

5. ## Econ/stats

The following data represent the number of flash drives sold per day at a local computer shop and their prices. Price (x) Units Sold (y) \$34 3 36 4 32 6 35 5 30 9 38 2 40 1 a. Develop a least-squares regression line and explain what the slope of the line

6. ## biology

.A ______________ _ is a signal to which an organism responds

7. ## Algebra

A 12' ladder leans against a wall at 68 degree angle of elevation. Find the distance from the ladder's base to the wall.

8. ## Chemisty

How do i convert 0.0024 to scientific notation

9. ## physics

A stunt flier is moving at 15m/s parallel to the flat ground 100m below,how large must the distance x from plane to target be if a sack of flour released from the place is to strike the target?

10. ## physics

Helium gas occupies a volume of 0.04 m 3 at a pressure of 2 x 10 5 Pa (Nm -2 ) and temperature of 300 K. Calculate (i) the mass of the helium. (ii) the r.m.s. speed of its molecules. (iii) the r.m.s. speed at 432 K when the gas is heated at constant

11. ## Physics

7. In a meeting room, there are chairs, a table, and people. Which of these things has a temperature a) lower than, b) greater than, or c) equal to the temperature of the air?

12. ## physics

a conducting loop consisting of a half circle of radius r=0.2m and three straight sections the half circle lies in a uniform magnetic field B that is directed out of the page the field magnitude is given by B=(4t^2 + 2t + 3)T .w/r t is in second. an ideal

13. ## physics

an electron moves in the plane of paper toward the top of the page .a magnetic field is also in the plane of the page and directed toward the right .what is the direction of the magnetic force on the electron ?

14. ## English

As a senior prefect of your school wite a speech you would give to fresh students telling them at least three things that can make their stay in the school successful

15. ## Math

Determine the number of diagonals in a regular 40-gpn

16. ## chemistry

What separatation method used to separate silver chloride (solid))and sodium trioxonitrate

17. ## math

A limited access highway had an access reduction and lost 1/13 of its exits. If 264 of its exits were left after the reduction how many exits were there originally?

18. ## PYSICS

The upward normal force exerted by the floor is 600 N on an elevator passenger who weighs 610 N. What is the reaction force to the upward normal force exerted by the floor? What is the reaction force to weight of the passenger? What is the magnitude of the

19. ## Math

An arc of lemgth 28cm subtends an angle at the centre of a circle. In the same circle, what angle does an arc of length 35 subtend

20. ## PSY 410 Abnormal Psychology

HELP- My text book wont let me open on my laptop and I can't seem to find the information I need. Create a timeline that displays the development of abnormal psychology. Include at least seven main milestones

21. ## Physics

A body travels from rest with acceleration 8m/s(squared)Find its velocity when it has covered a distance of 100 meter?

22. ## Physics

A stone is thrown horizontally at 30.0m/s from the top of a very tall cliff. Calculate its horizontal position and vertical position at 2s intervals for the first 10.0 s.

23. ## math

list the integers between -5 and 2, inclusive.

24. ## writing

Still, do-it-yourself renovations is usually a source of pride for new homeowners, no matter how hard or how frustrating. what correction should be made to this sentence? 1)remove the comma after still 2)change is to are 3) change the spelling of usually

25. ## English

Could you please tell me who/ what is the persona and who/what it is talking about? I got the idea of a snake and a spider but the two together don't make much sense in the context. I would really appreciate a fast rerply! "Eve" - by James Lasdun I like

26. ## Chemistry

Hydrazine has the formula N2H4 and is used as a rocket fuel (e.g. for the Apollo moon rockets). It burns in the following reaction for which the enthalpy change is -583 kJ/mol. N2H4(g) + O2(g) → N2(g) + 2 H2O(g) Calculate the N-N bond enthalpy in

27. ## Pre calc

sin(θ − ϕ); tan(θ) = 5/12 θ in Quadrant III, sin(ϕ) = − sqaure root10/10 ϕ in Quadrant IV. I used the sin equation sin(a)cos(b)-sin(a)cos(b) However I am still getting the wrong answer

28. ## physics

a galvanometer has a resistance 60 ohm and is of 5mA full scale deflection.how would you modify it so as to get 0-10V voltmeter

29. ## math

a spherical ballon is inflated with gas at the rate 20cm^3 min. how fast is the radius of the ballon changing at the instant when the radius is 2cm

30. ## chemistry

Discuss possible solutions to the reduced supply of light sweet crude oil. I have no idea to answer this question. Please advise me on how to answer it. Thanks in advance

31. ## writing

The cost of new homes is high today. Many people are purchasing older homes in need of renovation. the most effective combination of sentences 1 and 2 would include which of the following groups of words? 1) although many homes need renovation 2)although

32. ## Chemistry

Describe the manner in which ketohexose acts as a reducing sugar in the Benedict test.

33. ## math

a plane leaves an airport P 10 degrees south,60 degrees east and flies due north at 800km/hr.find its position after 24hrs

34. ## Chemistry

Ethanol has a density of 0.789 g/ml what volume of ethanol in litres would have a mass of 500g

35. ## mathematics

perform the indicated operation and express your result In a standard form i) (4+3i) + (6+4i) ii) 3 + 4i/6+3i

36. ## chemistry

what are the limitations of depression of freezing point

37. ## math

The human resources department of a consulting firm gives a standard creativity test to a randomly selected group of new hires every year. This year, 50 new hires took the test and scored a mean of 111.6 points with a standard deviation of 14.3. Last year,

38. ## math

a contractor needs two men and 5 litres of paint to paint on a fenced wall that is 40m by 3m in 9 hours. how many men and how much paint does he need to paint a fenced wall 20m by 12m in 3 hours

39. ## HOME ECO

ANOTHER WORD FOR NUTRITION

40. ## Pre calc

A 20-ft ladder is leaning against a building. If the base of the ladder is 7 ft from the base of the building, what is the angle of elevation of the ladder? (Round your answer to one decimal place.) How high does the ladder reach on the building? (Round

41. ## Math

Each day Trinh buys a can of soda at a machine in her apartment building for \$.75. Instead, she could buy a 12-pack at the grocery store for \$4.99. If she did this, how much money would she save in a month

42. ## chemistry

the reaction A+3B—>2C+D is first order with respect to reactant A and second order with respect to reactant B if the concentration of A is doubled and the concentration of B is halved the rate of the reaction would---------------by a factor of-----------

43. ## chemistry

the reaction A+3B->2C+D is first order with respect to reactant A and second order with respect to reactant B if the concentration of A is doubled the concentration of B is halfed and the rate of the reaction would -------by a factor of --------

44. ## chemistry

the reaction A+3B->2C+D is first order with respect to reactant A and second order with respect to reactant B if the concentration of A is doubled the concentration of B is halfed and the rate of the reaction would -------by a factor of --------

45. ## physics

what is the potential energy of 4 point charges each of value Q at the corners of a square of side length a.

46. ## Math

For what values of k does the line y= x + k pass through the circle defined by x^2 + y^2 = 25 at: 2 points? 1 point? 0 points? I found the discriminant: 100- 4k^2 but i don't know how to find for each of the points

47. ## math

what is the money value of 0.098

48. ## maths

A straight highway leads to the foot of a tower of height 50m. From the top of the tower, the angles of depression of two cars standing on the highway are 30 degree and 60 degree. What is the distance between the two cars and how far is each car from the

49. ## Algebra (Work Problem)

Susan's backyard has three faucets: A, B and C. If she turns on all three of them, it takes 380 minutes to fill the pool. If she turns on only A and B, it takes 570 minutes, and if she turns on only B and C, it takes 760 minutes. If she turns on only A and

50. ## Algebra

what are the appropriate metric units for measuring Bryce Canyon National Park

51. ## Algebra

In a triangle ABC, point o is the incentre AD=2", AB=9" and BC=10" find y

52. ## Algebra

What is the measure of each of the angles of a regular 5 sided polygon?

53. ## Algebra

write the equation in slope intercept form and identify the slope and y-intercept 4x+9y=4

54. ## Algebra

What is the measure of each of the angles of a regular 5 sided polygon

55. ## math

If you had 9 quarters, 6 dimes, 2 nickels and 3 pennies in a box, select on coin at random. What is the expected value of this experiment?

56. ## math

If the odds against John winning the election are 1 to 7,what is the probility that john will win the election

57. ## geography

what factors account for the similarities and differences between the subdivisions in tropical climate zones?

58. ## Econ/stats

The following data represent the number of flash drives sold per day at a local computer shop and their prices. Price (x) Units Sold (y) \$34 3 36 4 32 6 35 5 30 9 38 2 40 1 a. Develop a least-squares regression line and explain what the slope of the line

59. ## Health

I know that most epidemiologist have masters on public health. Can one have a masters in community health. Or does the mph cover community health. Please explain.

60. ## writing

Doctors in the field of preventive medicine concentrate on "preventing disease and to encourage" good health practices. Best way to write the portion? 1) preventing disease and to encourage 2)prevent disease and to encourage 3)to prevent disease and to

61. ## writing

They emphasized the importance of good maternal and child health care, including the administering of vaccines. what correction should be made to this sentence? 1) replace they with it 2) change emphasized to emphasize 3) change the spelling of importance

62. ## writing

Sentence 10: Finally, friends whom you haven't seen in years, long-lost relatives, and even mere acquaintances will begin calling in february to plan a lengthy visit with you in the summer. what correction should be made to this sentence? 1)change friends

63. ## History

Is this ok? The Industrial Revolution was a period from the eighteenth to the nineteenth century during which major changes in agriculture, manufacturing, mining, and transport had a massive effect on the social, economic,and cultural conditions starting

64. ## History

Well can i include that i think this is an interesting topic to study because you know about the different views. Can i add that to the statement?

65. ## health care

Idnetify and describe three causes for the increasing costs of health care.What impact does each of these causes have on society?

66. ## Physical Education

The smooth and effective working together of your muscles and bones is what? Some call it muscle tone.

67. ## math

a plane leaves an airport P 10 degrees south,60 degrees east and flies due north at 800km/hr .(a)find its position after 24hrs. (b)the plane turns and flies at the same speed due west to reach Q longitude 12 degrees west.find the distance it has travelled

68. ## Calculus

Find the distance traveled in 45 seconds by an object traveling at a velocity of v(t) = 20 + 3cos(t) feet per second.

69. ## Math

Car travels 200 miles using 8 gallons of gas. How many miles per gallon can the car travel

70. ## Chemistry

During the determination ofCaCO3 in chalk content by back titration. a_what inert materials are likely to be present? b_suggest other suitable indicators of the reaction.

71. ## maths

jimush walks 40m eastward and 30m southward the angle made between the two distance is 90degree calculate the other angels

72. ## mathematics

find the modulus argument and principal argument of each of the following a) i b) -√5

73. ## mathematics

in a class of 50 student,18 offered mathematics, 21 offered chemistry while 16 offered biology, 7 student offered mathematics and biology, 9 student offered chemistry and biology while 5 student offered the three subject combination. a) find the numbers of

74. ## chemistry

calculate the total vapour pressure of mixture of methanol(64g) and ethanol(92g) at 298K given that the pure vapour pressure of methanol is 90mmHg and ethanol is 45mmHg (C=12, H=1, O=16)

75. ## life orientation

how can i advise a friend who response to a conflict avoidance that is not a healthy for sustaining positive relationship

76. ## Chemistry

If 20g of NaCl was used to form a 250cm3 of saturated solution of NaCl at 25oC. Calculate the solubility of the salt in mol/dm3 at that temperature. (Relative density of solution-1).

77. ## Biology

List 15 mechanical and 15 biological vectors and the diseases they transmit.

78. ## Math

A bucket when a fifth full holds 10 litres .How many litres will it hold when it is full?

79. ## Math

Solve 1/8^2-3x=2y+2 find x using equation formula

80. ## Math

Solve 1/8^2-3x=2y+2 find x using e question formula

81. ## physics

describe the force board experiment to show how to obtain the resultant of two non-parallel coplanar forces acting at a point.

82. ## math

Two fractions have the same denominator,15. The difference between the fractions is 2/5,and the result of dividing one of them by the other is 4/7. What are the fractions?

83. ## math

the H.C.Of two numbers is 7and their L.C.M is 140.If one of the numbers is 28,find the other number

84. ## math

If (a+b)^2 = a^2 + 6b +b^2 ,what is the value of a?

85. ## math

the sum of two different numbers is 40 . if the smaller number is divided by 4 and the larger number by 12 the sum of the quotients is 6.find the larger number

86. ## science

Importance of reflection of sound waves

87. ## math

express 7.179179... as a fraction

88. ## math

Express 4.050505... as a fraction

89. ## math

a candy mixture is made from two kinds of candy one kind costs twice as much per kg as the other kind.\$10 worth of the less expensive candy is mixed with \$8 worth of the more expensive candy to make 7kg of the mixture what is the price per kg of each kind

90. ## math

Assume x and y have 5:3 profit sharing ratio respectivly and a new member enters by taking 1/5 from x and 1/3 from y.what will be the new ratio of the three people?

91. ## English

Vaping should be outlawed. Agree or disagree?

92. ## Math

Find the square root of 25xsquared-40xy+16ysquared

Please assist me to factorise the following. 4x^3 + 5x^2y - 4xy^2 - 5y^2 \

94. ## pre calc

To measure the height of the cloud cover at an airport, a worker shines a spotlight upward at an angle 75° from the horizontal. An observer D = 600 m away measures the angle of elevation to the spot of light to be 45°. Find the height h of the cloud

95. ## Physics

a 1 kg textbook has been pushed and let go sliding to the left on a flat table no one is pushing the book at this moment. it is sliding a. calculate the weight of the textbook? How do I do these calculations? b. based on this weight, what must the normal

96. ## world geography

The North African Maghreb states, dominated by the Atlas Mountains, do not include A. Libya. B. Algeria. C. Morocco. D. Tunisia.

97. ## physics

What is quantity of heat required to melt down completely 1kg of ice at 30 degree celsius

98. ## physics

consider a series R-C circuit consisting of a 30 ohm resistor and 20*10^-6F capacitor connected to a 100V,50Hz power supply.find the magnitude of the current and the angle by which the current leads the voltage.

99. ## physics

prove that I=square root of (I^2avarage). using I=Iosin(wt)