# samuel

Newest questions and responses by samuel
1. ## Maths

The total surface area of a rectangular solid is 130cm, if the solid is 7cm long and 5cm wide. Calculate the height

2. ## science

how would you determine the relative density of kerosene using a relative density bottle

3. ## physics

the earth is on average 150million km from the sun calculat its average speed in orbit

4. ## algebra

Your test scores in one class are 84 and 88 What possible scores can you earn on your next test to have a test average between 86 and 90 ​inclusive?

5. ## physics

the movement of a couple of 100N but 2.5m apart is

6. ## Computer C++ Programing

Using the if… else if, write a menu-driven program that permits the user to select one of the metric conversions: Lengths Weights Volumes Areas Use the following conversions: For Length: Inches to centimeter (1 inch = 2.54 cm) Yards to meters (1 yard =

7. ## Programing

Using the if… else if, write a menu-driven program that permits the user to select one of the metric conversions: Lengths Weights Volumes Areas Use the following conversions: For Length: Inches to centimeter (1 inch = 2.54 cm) Yards to meters (1 yard =

8. ## math

the minute hand of a clock is 6cm long.how far does the end of the hand travel is 35minute

9. ## Math

What is the height of an equilateral triangle with a side length of 6

10. ## science

A 40W bulb is switched on. It burns out brighter when it was switched on than a short time later.What account for this change in brightness

11. ## science

Two charged particles are 8.5cm apart .They moved and the force on each of them is found to be tripled .How far apart are they now

12. ## math

Using the vertices: B(-9,1), E(2,3), F(12, -2), G(1,-4). Determine whether BEFG is a rhombus, a rectangle, or a square. List all that apply and show the steps

13. ## math

Determine whether the figure with vertices R (-2, 5); O( 1,3); M(-3, -4); Y(-6,-2) is a parallelogram. Use the Distance and Slope Formulas.

14. ## math

For the following regular polygons, find the following, round to the nearest tenth, if necessary. 1. 24-gon 2. 30-gon 3. Polygon with 40 sides

15. ## Science

How is the equator similar to the prime meridian?

16. ## math

Find the perimeter of the given triangle. Round your answer to the nearest tenth if necessary. ∆BCH, if ∆CBH ∼ ∆FEH, ADEG is a parallelogram, BH = 4, HE = 7, EF = 25, and HF = 24.

17. ## math

Find the equation of the line that passes through (-2,-4), (1,-3) is it y=1/3x + -2 or y=1/3x+-10/3

18. ## math

A=P+Prt solve for t I don't know if it is either t= (a-p)/pr or t=-(1/r)+(A/Pr) or is it a completely different answer? Thank you in advance!!!

19. ## Algebra

a. For the first company, express in words the amount the cab company charges per ride and per mile. Charge per ride: \$3 per mile \$0.50 b. Write an equation in slope-intercept, point-slope, or standard form. Explain why you chose the form you did.

20. ## Math

You write 5 1⁄2 pages of a report in 2 1/3 hours. What is the average number of pages you write per hour?

21. ## Science

The two variables of interest in this lab are: "percent change in mass" of bag and "sucrose molarity" in the bag solution. On a graph of these two variables, which would be the independent variable, and which would be the dependent variable?

22. ## Math

Show that if the diagonals of a quadrilateral are perpendicular, then its area is half the product of the diagonals. What kind of drawing do I do? And how doI solve this? Thank you!

23. ## Arithmetic

A geometric series has a positive common ratio of r. The series has a sum to infinity of 9 and the sum of the first two terms is 5. Find the first four terms of the series.

24. ## Arithmetic

The sum of three consecutive terms of a geometric progression is 42, and their product is 512. Find the three terms.

25. ## math

Simplify each expression so that no negative exponents appear in the final result. Assume that all variables represent nonzero real numbers. 1. (12k^-2(k^-3)^-4)/(6k^5) 2. (3rs^-2)/(3^2r^2s^-4)

26. ## math

In a random sample of 200 students who were asked their favorite color, it was found that twenty more students liked blue than purple and eight fewer liked green than blue. Find the number of students who chose each color as their favorite. I posted this

27. ## math

Write a system of equations, three equations/three unknowns, that has (1, 2, 3) as the solution. for this can I just write any random coefficient and then put that as equal to 1,2 or 3? or if not what type of math would I use?

28. ## math

In a random sample of 200 students who were asked their favorite color, it was found that twenty more students liked blue than purple and eight fewer liked green than blue. Find the number of students who chose each color as their favorite.

29. ## Math

Of the students in a certain classroom, 9 are in the school play, 12 are in the orchestra, and 15 are in the choral group. If 5 students participate in exactly 2 of the 3 activities and all other students participate in only 1 activity. How many students

30. ## Math

I am 10years old my sister is 4years,in how many years shall i be twice as old as she will be?

31. ## Social Studies

Victory at which Battle convinced the British to help the Americans? I'm thinking its the Battle of Saratoga

32. ## Math

In a circle whose center is O, arc AB contaisn 100 degrees. Find the number of degrees i angle ABO?

33. ## GEOGRAPHY

WHAT IS LONTIUDE

34. ## maths

From point AandB on level ground,the angle of elevation of the top of a building are 25degree and 37degree respectively.if |AB|〓57m,calculate,to the nearest metre,the distances of the top of the building from AandB if they are both on thesame side of the

35. ## statistics

a survey from teeneage research unlimited found that 30% of teenage consumers receive their spending money from parttime jobs. If 5 teenagers are selected at random, find the probability that at least 3 of them have part time jobs

36. ## Algebra

1/3 of a number is added to 5. the result is one and half times the original number.find the number.

37. ## further maths

given that p=i+j-2k and q=2i-j+2k.find two vectors m and n satisfying that m is perpendicular to p,n is parallel to p and m+n=q

38. ## Surds

Write (2+3^1/2)^1/2 in the form root a plus root b ..and find a and b

39. ## Math

Austin pays \$1.50 per day for high speed internet after paying the equipment fee of \$35.00. Identify the constant of proportionality that relates his internet charges (y) to the number of days (x) he has internet.

40. ## physics

(1) a car travelling at a constant speed of 20ms-1 overcomes a constant frictional resistance of 300N. What is the horse power of the engine? ( take 1h.p = 3/4 kw)

41. ## Physics

A tennis ball is thrown with a velocity of 30m/s at an angle of 60^ of the horizontal calculate the time,m/s,and the range

42. ## English Beowulf

How did the culture of Beowulf view pride? Why?

43. ## Physics

The density of copper is 9.8 kilograms per meter cube and the density of gold is 1.9 kilograms per meter cube. When two wires of these metals are held under the same tension, the wave speed in the gold is found to be half that in the copper wire. What is

44. ## maths sir-reiny help calculus

solve the differential equation (x^2-xy+y^2)dy-xydx=0 plz show me working

45. ## calculus help me pllllllllllz

Find out what kind of improper integral is given below §dx/{x^4+4}....?,hence evaluate the integral with upper boundary=infinity lower boundary =0 i need help plz show me full work

46. ## maths need help

the transverse of the conic:3x^2-y^2+2y-1=0 is ???

47. ## science

A concave lens or focal lens 10cm produce an erect image 40cm from the lens .Determine the object distance and magnification.

48. ## Probability

Find the probability that a committee of 10 people chosen from an organization consisting of 40 doctors and 35 dentists will include 3 doctors and 7 dentist. 40c10 + 35c10 not sure what to do after setting it up. Need help

49. ## 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

50. ## Chemistry

What is the oxidation half reaction for the following equation: Cr2O7^-2 +Fe+2 - - > Cr^+3 + Fe^+3 Cr^+3 - - > Cr2O7^-2 Fe^+2 - - > Fe^+3 Fe^+3 - - > Fe^+2 Cr2O7^-2 - -> Cr^+3***

51. ## Chemistry

What is the reducing agent in the following reaction? 2K + S - - > K2S K*** S K2S None of these

52. ## physics

A piece of copper of mass 40 grams at 20 degrees Celsius is placed in a copper calorimeter of mass 60 grams containing 50 grams of water at 10 degrees Celsius .ignoring heat losses,what will be the final steady temperature after stirring?(specific heat

53. ## calculus-help.. .Me

if y=e^(-kt)[Acosh(qt)+Bsinh(qt)] where A,B,q and k are constant show that d^2y/dt^2+2kdy/dt+(k^2-q^2)y=0 step plz thanks

54. ## expansion help

find the series of the expansion (1+(1/x^3)) help!!!!

55. ## physic

Two forces of magnitude 4.ON ans 7.0N act on a small object b. The angle btw the direction along which the force is 50 degree.determine the magnitude *nd direction of d resultant force on d body b.

56. ## physic

Two forces 5N and 10N act on a body in the direction due North and east respectively at an angle 75 degree. Calculate the resultant force of the inclined angle.

57. ## chemistry

what will haprn if ammonium chloride solution is used to standardize potassium tetraoxamaganate VII solution instead of ammonium iron II sulphate

58. ## calculus help

integrate:dx/(3x^3-5)^3 help plz show step

59. ## calculus plz help me

integrate:dx/((x-1)sqrt(x^2-2) plz show solution i plead

60. ## Economics!

Suppose a chemical company is in a perfectly competitive industry and has a short run total cost curve of TC = q3 + 5q2 + 10q + 10 and a short run marginal cost of SMC = q2 + 10q + 10. At the price of 49, how many will be produced?

61. ## math

calculate the volume of the solid when the composite of a cube of edge is 28cm and the square -based pyramid of it height is 16cm

63. ## math

make a table and graph each quadratic function. use integers from -3 to 3 inputs 1. y=-x^2 2. y=2x^2 3. y=-8x^2 4. x^2 + 2

64. ## Probability

The letters in the word MATHEMATICS are arranged randomly. What is the probability that the first letter is E? Preview What is the probability that the first letter is M?

65. ## Probability

A computer password is required to be 9 characters long. How many passwords are possible if the password requires 2 letter(s) followed by 7 digits (numbers 0-9), where no repetition of any letter or digit is allowed?

66. ## english,maths,chem,phy,bio,agric,civic,etc

What are the equations of motion.

67. ## life orientation

indetify three courses are interested after grade 12

68. ## Math

How do i solve for b. 5=2pi/b

69. ## Math

How do i find out the sin and cos equation of a sinusoidal graph?

70. ## Math

How do i find "d" and "c" values in y=cos(x+(pi/2)) Base equation is y= A cos B (x +- C) +- D

71. ## Math

How do i find the asymptotes of: y=(1/x-4)+3

72. ## Math

How do i find asymptotes without graphing?

73. ## Physics

How much heat is absorved when a temparature of a piece of iron of mass 0.1kg and specific heat capacity 2*10 rest to power of 2 J/kg/k is rise from 25degree celcius to 75degree celcius

74. ## physics

A stone of mass 0.7kg is projected vertically upward with a speed of 5m/s.calculate the maximum height reached. [Take g=10m/s^2 and neglect air resistance]. "

75. ## COMPUTERS

CALCULATE THE AREA OF CIRCLE OF RADIUS 2CM USING FORTRAN PROGRAMMING LANGUAGE

76. ## Science

A compound on analysis as 87:8% c,12:2%h determine its empirical formular&molecular formular given mass=56gmol

77. ## Chemistry

A compound on analysis as 87:8% c,12:2%h determine its empirical formular&molecular formular given mass=56gmol

78. ## calculus

Find the minimum distance between the curves y=e^x and y=lnx. Hint: Use the fact that e^x and lnx are inverse relationships. I have no idea where to start. Thanks!

79. ## math

The perimeter of a rectangular concrete patio is 38 meters. The area is 90 square meters. What are the dimensions of the patio?

80. ## math

the horizontal,vertical and diagonal columns and rows of a magic square all add to the same sum.use the digits 1-16 one time each to make a magic square

81. ## physics

a car which weight is 1000N is travelling at 90kmn/hr and come to rest in a distance of 50m after applying the brakes. assume uniform acceleration, calculate how large its stopping force was exerted by the friction between the wheel and the road.

82. ## Math

a 6.5 ounce can of tuna for \$1.39 or a 3 ounce can of tuna for \$0.65. the 6.5 ounce can of tuna costs ________ the 3 ounce can of tuna costs __________ the ______ ounce can of tuna is the better buy

83. ## logics in programming

for A=1 to 30

84. ## Elective maths

A particle P of mass 7kg is suspended by two inextensible strings AP,BP of lengths 40cm and 75cm respectively. The ends, AP of the strings are attached to two point at the same level, whose distance apart is 85cm. Find angle APB and the magnitude of the

85. ## physics sl

A dead dog of mass 2.2 kg and an initial speed of 5.5 m.s-1 slides along a rough horizontal surface and stops after travelling 4.2 m. calculate the frictional force between the dog and the surface (Think of the work the friction has to do to stop the dog

86. ## math

What are the steps to show the quotient in simplest form? 0.000027/0.000009

87. ## math

A certain computer can perform 10^5 calculations per second. how many calculations can it perform in 10 seconds

88. ## Chemistry

If an aquarium tank holds 100 litres of water, calculate how much heat energy would be required to heat the tank from 18.2 Degrees(C) to 32 Degrees(C)

89. ## Chemistry

The solubility of potassium nitrate at 20¡ãC is 340g/litre. How many grams of KNO3 can dissolve in 185ml of water?

90. ## mathematics

A man takes a 500km trip in his car, He rotates his tyres (four on the car and one spare) so that in the end of the trip each tyre has been used for the same number of kilometres. How many kilometres did each tyre cover?

91. ## English

In Fahrenheit 451, what pages are these words found on? I really need help just with this. It would be nice to help me out. Here are the words. Part 1: Abruptly, intact Part 2: certitude, darkling, dispersing, linguists, moor, televisors Part 3: scuttling

92. ## Science

4g of an organic compound gave 2.34g of carbon 0.16g of hydrogen 0.46g of nitrogen 1.04g of oxygen.what is the empirical formula

93. ## math

During the summer holidays,your brother earns extra money mowing lawns.He mows 6 lawns an hour and has 21 lawns to mow.How long will it take him?

94. ## math

A diver on a platform 40 feet in height jumps upward with an initial velocity of 5ft/s. His height in h feet after t seconds is given by the function h=-16t^2+5t+50. a. What is his maximum height? I got 50.39 b. How long will it take him to reach the

95. ## Math

I have the same problem as Marita. Can someone tell us what equation to use. Horizon has a cell phone plan for \$28.00 per month plus \$.30 per minute with unlimited anytime network minutes and a free flip phone for new customers. How do I put this in an

96. ## physics

isolate for f 1/di = 1/f - 1/do show all the steps pls

97. ## physics

isolate for t s = ut + 1/2at^2 please show all ur steps  

98. ## physicss

state the precision of the measured quantities 1. 0.07 m 2. 908 s 3. 7.60 L 4. 0.005 0 mm answers: 1. 0.01 m 2. 1 s 3. 0.01 L 4. 0.0001 mm i do not understand this , please explain it to me

99. ## physics

state the precision of the measured quantities 1. 353g 2. 6.00cm please explain