# Questions Asked onMarch 17, 2017

1. ## Physics

Two point charges of 16 microcoulomb and - 9 microcoulomb are placed at8 cm distance. determine the position of the point at which resultant electric field is zero

2. ## Math

Square ABCD has side length 60. An ellipse E is circumscribed about the square and there is a point P on the ellipse such that PC = PD =50. What is the area of E? I got to the part with the point (30, 30). Now what next?

3. ## math

A motorboat covers the distance from one pier to the other pier in 4 hours and the way back in 5 hours. What is the speed of the boat in still water, if it covers 70 km with the current in 3.5 hours?

4. ## Algebra

An aircraft factory manufactures airplane engines. The unit cost C (the cost in dollars to make each airplane engine) depends on the number of engines made. If x engines are made, then the unit cost is given by the function =Cx+−0.2x248x21,748 . What is

5. ## Math

Use the sterm-and-lead plot below to answer questions 1-3 Stem Leaf 5 4 5 6 0 6 9 7 2 3 4 5 5 8 1 2 8 9 9 5 6 5/4= 54 1. What is the range of data? A. 40*** B. 42 C. 54 D. 96 2. What is the median of the data? A. 64.5 B. 72.5 C. 74.5*** D. 75 3. What is

6. ## Geometry proportions in triangles

1. What similarity statement can you write relating the three triangles in the diagram? A. UVW~UWT~WVT B. UVW~ WUT~WVT C. WUT~ VUW~WVT D. TWV~ WUV~UWT 2. What are the values of A and B? A. a=9/2, b=15/2 B. a=15/2, b= 9/2 C. a=16/3, b=15/2 D. a=9/2, b=13/2

7. ## calculus

Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it. lim x→∞ {(5x − 4)/(5x + 3)}^5x + 1

8. ## Social studies 7

What inspired the boxer rebellion? The open door policy Industriazatiin in Japan Foreign influence in china The overthrow of queen liliuokalani

9. ## Math - Trigonometry

A, B and C are three towns, the bearing of B and C from A being 295° and 205°, and their distances from A are 280km and 800km respectively. Find the bearing of C from B to the nearest minute.

10. ## Chemistry

A gas expands its volume from 4.7 L to 8.9 L at constant temperature. Answer the following: a) If the gas expands against vacuum conditions, calculate the work (in joules) done by the gas. b) Calculate the work done (in joules) by the gas if it expands

11. ## Calculus/Optimisation

An open water tank with a square base is to be made from a thin sheet of metal. find the length of the square base and the height of the tank so that the least amount of metal is used to make a tank of capacity 8 meters cubed

12. ## Chemistry

What is the final temperature when 180.0 mL water at 101.3 C is added to 93.1 mL of water at 65.5 C?

13. ## math

Two shelves contain 55 books. If half of the books from the second shelf were relocated to the first shelf, then the first shelf would contain 4 times more books than the second one. How many books are there on each shelf?

14. ## physical science

an object has 2.0x 10^19 more electrons than protons. What is the net electric charge of this object in coulomb?

15. ## calculus

Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it. lim x→0 (e^x − e^−x − 2x)/(x − sin(x))

16. ## science

Two charges repel each other with a force of 10-5newton when they are 20cm apart. what is the force on each of them are i 3cm apart and ii when they are 100cm

17. ## science

The wood thrush is a bird species that lives in deciduous forests in North America. Wood thrushes nest in tall trees, forage for insects and snails in decaying leaf litter on the forest floor, and drink water from nearby freshwater sources. Identify one

18. ## Physics

A positive charge moving up enters a magnetic field pointing out of the screen. What is the direction of the magnetic force on the charge? up down right left

19. ## Physics

A wire runs left to right and carries a current in the direction shown. What is the direction of the magnetic field at point Z?

20. ## calculus

Find dy/dx by implicit differentiation. arctan(2x^2y)=x+4xy^2

21. ## Science

Compare lunar and solar eclipses and answer the following questions: How does a lunar eclipse happen? How does a solar eclipse happen? Which one occurs more often?

asked by Help I need somebody not just anybody
22. ## Statistics

Consider a t distribution with 30 degrees of freedom. Compute P(t "greater than or equal to" -1.50). Round your answer to at least three decimal places. Consider a t distribution with 6 degrees of freedom. Find the value of c such that P(-c

23. ## Math - Geometry!!!

What shape is created if you connect the following points: (1,1), (5,1),(7,3), and (3,3)?

24. ## English

Like the modernists, postmodern writers focused on subjective experience rather than objective cultural norms.

25. ## Math

what is the surface area of the rectangular prism? length: 21.5mm height: 5mm Width: 4mm A. 480MM^2 B. 427MM^2**** C. 213.5MM^2 D. 255MM^2

26. ## algebra

peter is twice as old as paul was when peter was as old as paul is now. the combined ages of peter and paul is is 56 years. how old are peter and paul now?

27. ## Language Arts

1. Which of the following sentences has correct subject-verb agreement? A. A scarf or a hat keep you warm in the winter. B. Either Grandma or your brother pick your birthday gifts each year. C. Stacey and her sisters go to the beach every summer.** D. A

28. ## Language Arts

The Tide Rises, the Tide Falls by Henry Wadsworth Longfellow The tide rises, the tide falls, The twilight darkens, the curlew calls; Along the sea-sands damp and brown The traveller hastens toward the town, And the tide rises, the tide falls. Darkness

29. ## math

in cooking 1 drop equal 1/6 of a dash. if a recipe calls for 2/3 of a dash, how many drops would that be.

The area of a square floor on a scale drawing is 64 square centimeters, and the scale drawing is 1 centimeter:2 ft. What is the area of the actual floor? What is the ratio of the area in the drawing to the actual area? I have been trying to answer this

31. ## Chemistry

Which equation would describe the following equilibrium constant? Kc = [Bi3+]2[S2-]3 ----- Bi2S3 (s) 2Bi3+ (aq) + 3S2- (aq) Bi2S3 (s) + 6HCl (aq) 2BiCl3 (aq) + 3H2S (aq) BiS (s) Bi3+ (aq) + S2- (aq) Bi2S3 (s) 3Bi2+ (aq) + 2S- (aq)

32. ## Maths

Dennis score 7.5mark in a test and it is equivalent to 93.75%.what is the total marks for the test?

33. ## Math

The difference between two numbers is 21. If twice the smaller number is added to one-half of the larger number, the result is 38. What are the numbers?

34. ## math

The sum of two numbers is equal to 63 and their difference is equal to 12. Find the numbers.

35. ## Statistics

I am confused by the following and need some help You want to find the values for the equation ŷi=a+bxi. What is the value of the slope? time spent on Bookface predictor variable, time spent working is the response variable. correlation between minutes

36. ## chemistry

Calculate the pH of a buffer solution prepared by mixing equal volumes of 0.20 M NaHCO3 and 0.10 M Na2CO3. (Ka = 4.3 x10-7)

37. ## Math

Simplify 5! A.5 B.15 C.120 D.125

38. ## geometry

Let the incircle of triangle $ABC$ be tangent to sides $\overline{BC}$, $\overline{AC}$, and $\overline{AB}$ at $D$, $E$, and $F$, respectively. Prove that triangle $DEF$ is acute. I have tried proving that triangle DEF's angles were les than the opposite

39. ## Algebra

Consider the following matrix. A = 7, -5 -4, 3 Choose the correct description of A Find A^−1 if it exists. Answer either Choice 1, or Choice 2: CHOICE 1: A is nonsingular; that is, it has an inverse. A^-1 = _________ or CHOICE 2 : A is singular; that is,

40. ## English

1. Write about you and introduce yourself taking turns in groups. 2. Write about yourself and introduce yourself taking turns in groups. ----------------------- Do we have to use 'you' or 'yourself' after 'about'?

41. ## Math

A container has capacity of 2/3. It is filled 3/4. How many liters of water will be left in the container after 1/6 liter is poured out? I have no idea how to do this problem! Please help guide me through this math problem! Thank You!

42. ## Math

whats the decimal notation for seventy seven thousandths

43. ## Math

2 + 6+ 10+ 14 + 18 + 22 + 26+ 30+ 34 + 38 = 200 To inme se kisi 5 ko Total kar ke 100 banaao.!

44. ## Algebra

John will be half of the father's age his father will be 33 next year, how old will John be

45. ## Algebra

In 4 years time John will be half of the father's age his father will be 33 next year, how old will John be

46. ## English

Like the modernists, postmodern writers focused on subjective experience rather objective cultural norms A: Expressing or dealing with facts or condition as perceived without distortion by personal feelings prejudices or interpretations** B: Characteristic

47. ## Math

The oldest man in the world is 110 years old . If his younger brother is 9/10 of his age how old is his younger brother?

48. ## Spanish

What can visitors see at the Canaima National Park?

49. ## English

1. I have two dance classes on Monday. 2. I have two dancing classes on Monday. (which one is correct as a subject, dance or dancing?)

50. ## Math

What is half of 4 and 4 1/2

51. ## Social studies

why was the americans attack on manila harbor in the philippines important for a quick american victory in the spanish american war? The United States relied on war supplies from Asia and securing the Philippines protected those.••• The United States

52. ## economics

Explain why we might be concerned about the potential for the misrepresentation of costs.

53. ## Last math question of the night plz help quickly!

Find the domain and ranges of the following: f(x)=(2/3)x-3 f(x)=-3x+7 Thank you in advance, this helps me a lot because I really suck at finding domain/range and it's super late rn.

54. ## Food analysis

How to prepare 0.5m of hcl

55. ## physical science

a cars radio draws 0.25 A of current in the autos 12 volt electrical system. How much power in watts does the radio use?

56. ## chemistry

when hcl reacts with mg, how many grams of magnesium are needed to produce 100 grams of hydrogen?

57. ## Physics

The magnetic field 0.02 m from a wire is 0.1 T. What is the magnitude of the magnetic field 0.01 m from the same wire?

58. ## English

doing research on a report for how study scheduling apps can help students. the apps i have chosen are evernote, my study life and my homework. The info i need is how these apps can benefit students and how they can actually help and how they coorelate to

59. ## Math

A rectangular field has side lengths of 2/3 mile and 3/4 mile. What is the area of the field.

60. ## Physics

What must be known to determine the direction of the magnetic force on a charge? the type of the charge the amount of the charge the direction of the magnetic field the velocity of the charge the strength of the magnetic field

61. ## Chemistry

Determine the pH of a solution after 20.00 mL of 0.4963 M HI has been titrated with 12.64 mL of 0.5174 M NaOH.

62. ## PHYSICS

a stone of mass 0.5kg is drop from a height of 12m. calculate; it's kinetic energy. (g=10m/s2).

63. ## english

Who am I? I am a national builder My favourite letter is K My favourite food is Japanese

64. ## maths

OPQR is a rhombus , three of whose vertices lie on a circle with centre O.If the area of the rhombus is 32 root 3cm square ,find the radius of the circle

65. ## maths

ABCD is a parallelogram and AE perpendicular to DC if AB is 20cm. and the area of parallelogram is 80cm. then find the AE which is 90degree?

66. ## Social studies

The Macdonald-Cartier bridge that stretches the Ottawa River and connects Ontario to Quebec is named for two Canadian politicians, one ______ and one _______. A)English, German B)Inuktitut, French C)French, Cree D)English, French

79. ## Maths

Peter deposit k180600 with bsp which offers 6 1/4% per annum interest. Calculate the Interest earned after 6 years if it is compounded:

80. ## Science

If 5 equal pieces of 25 ohm (omega) is joined in parallel then what is the equivalent resistance of it. Is it 5 or 1.please urgent

81. ## Linear Algebra

I need help for the Linear Algebra B Unit 2 test. Please help. 1. For the data in the table does Y vary directly with X? If it does, write and equation for the direct variation. l X l Y l l 10 l 15 l l 16 l 24 l l 20 l 30 l A- Yes: Y=1.5X B- Yes: Y=2x C-

82. ## Maths

How much money would I need to invest for 8 years at 6 1/4% simple interest to earn k500?

83. ## physics-lenses

A converging lens of focal length 4.3 m produces a magnified image 6.7 times the size of the object. What is the object distance if the image is real? virtual? pleasse help!

84. ## Maths

Having invested k12000.00 into fixed deposit account for 5 years,i received k1850.00 what was the simple interest rate?

85. ## physics-lenses

A converging lens f1=10cm, is placed 25cm to the left of a diverging lens, f2=−15cm. An object is placed 22cm to the left of the converging lens. Locate the final image... in cm and its magnification. I'm not sure how to approach this problem, or the

86. ## Mink high school MatheMatics

Peter deposit k180600 with bsp which offers 6 1/4%per annum interest. Calculate the interest earned After 6years if it is compounded:

87. ## physics-lenses

What eyeglasses would you prescribe for persons with the following conditions: a) A near point of 49.8cm ? b) A far point of 49.8cm ?

88. ## Math - Trigonometry

When calculating the lengths for a square based pyramid, is there a way to calculate the length from a point to the point opposite of it, given the side length and height? Thanks in advanced.

89. ## economics

why we might be concerned about the potential for the misrepresentation of costs.

90. ## science

An object 4.0cm in height is placed at a 25cm from a concave mirror of focal length 15cm.find the position, nature, and size of image formed.

91. ## Algebra

6. List of all the Quadrilaterals with exactly one pair of Parallel sides. A. Parallelogram; Trapezoid B. Rhombus; Parallelogram; Rectangle C. trapezoid D Rhombus; Square; Rectangle I wanna say its B but I'm not sure :/ I haven't really got a 100%

92. ## Algebra

A $4,000 principal is invested in two accounts, one earning 3% interest and another earning 4% interest. If the total interest for the year is$126, then how much is invested in each account?

93. ## Math - Trigonometry

The diagonal of a rectangle of width 3.8, makes an angle of 32° 15' with each of the longer sides. Find the length of the diagonal, and the length of the rectangle. Im not sure how to picture/draw the shape, which in term will tell me if it is cos, sin or

94. ## Math - Trigonometry

Standing on top of a building 42 m high, an observer sights two objects at P and Q on opposite sides of the building. The angles of depression from the observer to P and Q are 23° 18' and 35° 33' respectively. What is the distance between P and Q to the

95. ## Basic Math

Surface area of a square pyramid 11in 13in and 9in 11 height 13 side? 9 base edge I keep getting the wrong answer its not 328.62 or 294.93 Square area of a cone 15 side? 12 height 6 base It's not 365.99 or 417.62 I don't need anything rounded...help

96. ## Math

Sorry for posting twice I have to round 7276.74 by two decimal places but I keep getting it wrong...

97. ## History

Identify two factors that led to Hitler launching the Battle of Britain. A.the surrender of France, B.an American policy of isolationism, C.the Munich Conference, D.a German alliance with Italy. I think it is d and c, but I'm not too sure.

98. ## Math

Surface area of a square pyramid 11in 13in and 9in 11 height 13 slant height 9 base edge I keep getting the wrong answer its not 328.62 or 294.93 Square area of a cone 15 slant height 12 height 6 base

103. ## Math

Professor Smith has invented a time machine and is going to travel back in time 15 years to buy his wife a diamond ring. The ring cost $5000, 15 years ago . The average rate of inflation is 3.09% per year. Round answers to nearest whole$. How much money

104. ## Calculus/Optimisation

A skateboarded decides to jump off a ramp. The path of the jump from the ramp can be approximated by: h = -3t^2 + 6t + 1 Where h is the height above the ground in meters, s is the horizontal displacement and t is the time after leaving the ramp in seconds.

105. ## Math

7m long flagstaff is fixed on tower standing on horizontal plain . Frm a point on the ground angle of elevation of top and bottom of flag staff are 60 and 40 find height of tower

106. ## Algebra

Difference of two ninbers is 5 and difference of thier reciprocal is 1/10 find the numbers. Answer: X-Y=5 X=Y+5 1/X - 1/Y = 10 1/Y+5 - 1/Y =10 LCM ....

107. ## Math, Induction

prove by induction that 3.7^(2n)+1 is divisible by 4

108. ## Help Polynomial

A polynomial P(x) has remainder R x +S on division by (x-a) (x-b). If a is not equal to b, express the constants R and S in terms of a, b, P(a), P(b). Find the remainder when P(x) is divided by (x-a)^2.

109. ## Math

A bank advertises a savings account that earns 3% APR compounded daily. What is the "n" become for the compound interest formula?

110. ## Physics

If a Wire Resistance is 10 ohm at 0 DegC and the same wire Resistance becomes 15 ohm at temperature 100 DegC, then at what temperature the wire Resistance will be 30 ohm? Temperature coefficient of the wire material is 0.0047.

111. ## English

Which of the following lines from a&p illustrates updikes use of conflict A. the whole store was like a pinball and I didn't know which one they'd come out of. B. you could see the, when Queenie's white shoulders dawned on then, kind of move, or hop, or

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