kd

Most popular questions and responses by kd
1. English

Which of the following phrases best describes the setting of the story?

2. CHEMISTRY

2BrF3(g)Br2(g) + 3F2(g) STANDARD ENTHALPY?

3. Math

What is the square root of the number obtained when 196 is multiplied by 4?

4. Math

The internal and external radii are estimated to be 6 cm and 8 cm respectively, to the nearest whole number. The height of the cylinder is exactly 14 cm. (a) Determine the exact values for internal and external radii which will give maximum volume of the

5. math

A two digit number is such that, the sum of its digits is 13. When the digits are interchanged, the original number is increased by 9. Find the original number.

6. math

salesman is paid a commission of 2% on goods sold worth over Ksh 100 000. He is also paid a monthly salary of Ksh 12 000. In a certain month, he sold 360 handbags at Ksh 500 each. Calculate the salesman earnings that month Total earned = salary +

7. Math

The base of a right pyramid is a rectangle of length 80 cm and width 60 cm. Each slant edge of the pyramid is 230 cm. Calculate the volume of the pyramid.

8. math

A wholesaler sold a radio to a retailer making a proﬁt of 20%. The retailer later sold the radio for Ksh 1560 making a proﬁt of 30%. Calculate the amount of money the wholesaler had paid for the radio.

9. Math

The lengths of three wires were 30m, 36 m and 84m. Pieces of wire of equal length were cut from the three wires. Calculate the least number of pieces obtained.

10. Math

find the two possible of x if 10sinx = 6 and 0

11. Math

Given that a*b = a + b + ab a) evaluate 3*5

12. Math

A photograph print measuring 24cm by 15 cm is enclosed in a frame. A uniform space of width x cm is left in between the edges of the photograph and the frame. If the area of the space is 270cm', find the value of x.

13. Math

a recipe used 2/3 cup of sugar for every 2 teaspoons of vanilla. how much sugar was used per teaspoon of vanilla?

14. math

A rectangular box open at the top has a square base. The internal side of the base is x cm long and the total internal surface area of the box is 432cm2. Express in terms of x. (i) the internal height h, of the box; (ii) the internal volume V, of the box.

15. Math

The distance covered by a moving particle through point O is given by the equation, s = t^3- 15t^2+ 63t -10. Find: (a) distance covered when t = 2 (b) the distance covered during the 3rd second; (c) the time when the particle is momentarily at rest; (d)

16. math

find the two possible of x if 10sinx = 6 and 0

17. Math

A bag contains 3 black balls, 4 green balls and 5 yellow balls. a) if two balls are picked at random without replacement, find the probability that Botha balls are of the same color. b) How many black balls must be added to the bag so that the probability

18. Math

A school water tank is in the shape of a frustum of a cone. The height of the tank is 7.2 m and the top and bottom radii are 6m and 12 m respectively. (a) Calculate the area of the curved surface of the tank, correct to 2 decimal places. (b) Find the

19. Math

Find the integral values of y in the inequality 2y + 3 < 27 if y > 9

20. Math

Given that exterior angle of a regular hexagon is x, find the size of each interior angle of the hexagon. What is the correct answer for this question?

21. Math

Given that sin(x + 60) degree = cos(2x) degree, find tan(x + 60) degree.

22. math

A businessman makes a proﬁt of 20% when he sells a carpet for Ksh 36 000. In a trade fair he sold one such carpet for Ksh 33 600. Calculate the percentage proﬁt made on the sale of the carpet during the trade fair.

23. math

find the reciprocal of 0.0247, hence evaluate (3.025)^1/3))/0.0247 correct to 2 decimal places.

24. math

evaluate (sin 30°-sin60°)/tan60°

25. math

Given that OA =( 2 3) and OB = (-4 5). Find the midpoint M of AB.

26. math

A number m is formed by writing all the prime numbers between 0 and 10 in an ascending order. Another number n is formed by writing all the square numbers between 0 and 10 in a descending order. (a) Find m - n; (b) Express (m - n) as a product of its prime

27. math

Twenty ﬁve machines working at a rate of 9 hours per day can complete a job in 16 days. A contractor intends to complete the job in 10 days using similar machines working at a rate of 12 hours per day. Find the number of machines the contractor requires

28. math

cylindrical solid whose radius and height are equal has a surface area of 154cm2. Calculate its diameter, correct to 2 decimal places. (Take = 3.142)

29. math

A small cone of height 8 cm is cut off from a bigger cone to leave a frustum of height 16 cm. If the volume of the smaller cone is 160 cm'. find the volume of the frustum.

30. math

A cylindrical pipe 2 ½ metres long has an internal diameter of 21 millimetres and an external diameter of 35 millimetres. The density of the material that makes the pipe is 1.25 g/cm‘. Calculate the mass of the pipe in kilograms. (Take n = 22/7)

31. Math

the figure AB = 11cm, BC = 8cm, AD = 3cm, AC = 5cm and DAC is a right angle. The size of ADC; The size of ACB; The area of the quadrilateral ABCD. tan ADC = 5/3 11^2 = 5^2+8^2 - 2*5*8 cos ACB Now you can figure the areas of the triangles ACD and ACB, and

32. math

The interior angles of an octagon are 2x, 1/2x, (x + 40)°, 110°, 135°, 160°, (2x + 10)° and 185°. Find the value of x.

33. Math

Given that the exterior angle of a regular hexagon is x, find the size of each interior angle of hexagon. so 6x 6x = 360 6x/6 = 360/6 x = 60 Is that correct?

34. Math

water flows from at 27 cubic centimeter per second, into a rectangular container of length 60cm, breadth 30cm and height 40 cm. if a 6:00pm the container was half full will be the height of water is at 6:04 pm?

35. math

A fruit vendor bought 1948 oranges on a Thursday and sold 750 of them on the same day. On Friday, he sold 240 more oranges than on Thursday. On Saturday he bought 560 more oranges. Later that day, he sold all the oranges he had at a price of Ksh 8 each.

36. Math

Given that the exterior angle of a regular hexagon is x, find the size of each interior angle of hexagon.

37. geometry

Lines BA and BC are opposite rays, Lines BD bisects angle EBC and Line BF bisects angle ABE. If the measure of angle EBD=4x+16 and the measure of angle DBC=6x+4 find the measure of ange EBD If the measure of angle ABF =7x-8 and the measure of angle

38. Math

A triangle T with vertices A (2,4), B(6,2), and C(4,8) is mapped onto Triangle T’ with vertices A’(10,0), B’(8,-4) and C’(14,-2) by a rotation. Determine the center and angle of rotation that maps T onto T’.

39. Math

school water tank is in the shape of a frustum of a cone. The height of the tank is 7.2 m and the top and bottom radii are 6m and 12 m respectively. (a) Calculate the area of the curved surface of the tank, correct to 2 decimal places. (b) Find the

40. Math

the triangle ABC., BC = 12cm, ABC = 80 degree and ACB = 30 degree Calculate the area of triangle ABC. asked by Kd today at 3:06pm angle BAC = 180-80-30 = .... now find AB using the Sine Law. Area of triangle = (1/2)(AB)(BC)sin80° = .... you do the

41. Statistics

The structure of a two-factor study can be presented as a matrix with the level of one factor determining the rows and the levels of the second factor determining the colums.With this structure in mind,describe the mean differences that are evaluated by

42. Math

The lengths of three wires were 30m, 36 m and 84m. Pieces of wire of equal length were cut from the three wires. Calculate the least number of pieces obtained.

43. Math

A solid S is made up of a cylindrical part and conical part. The height of the Soild is 4.5m. The common radius of the cylindrical part and the conical part is 0.9m. The height of the conical part is 1.4m. a. Calculate the volume,correct to 1 decimal

44. Math

It took 6.5 gallons of gas to fill the tank of the family car. If the tank is .25 full when they arrived at the gas station, how much gas does the tank hold.

45. Math

a recipe used 2/3 cup of sugar for every 2 teaspoons of vanilla. What is the unit rate in cups per teaspoon ?

46. Math

A Kenyan bank buys and sells foreign currencies Buying (Ksh) Selling(Ksh) 1 Sterling pound 130.10 130.54 1 South African Rand 9.52 9.8 A businessman on a trip to Kenya had pound 50,000 which he coneveted to Kenya shillings. While in Kenya, he spent 80% of

47. Math

A solid S is made up of a cylindrical part and conical part. The height of the Soild is 4.5m. The common radius of the cylindrical part and the conical part is 0.9m. The height of the conical part is 1.4m. a. Calculate the volume,correct to 1 decimal

48. Math

Given that exterior angle of a regular hexagon is x, find the size of each interior angle of the hexagon.

49. Math

Mr. Caldwell has 28 students in his class and 12 of them are boys. What is the ratio of girls to boys? A. 4 : 7 B. 3 : 4 C. 4 : 3 D. 7 : 4

50. math

A number which is divisible by 3 is chosen at random from a set of even numbers between 1 and 20. What is the probability of choosing the numbers?

51. word problem

i need to solve with no words...a man, fox, goose, and corn are on one side of the river with only a boat for crossing. the goal is to transfer man, fox, goose, corn across the river using the boat which will carry the man and only one other thing. the fox

52. Math

The corner A, B, C and D of a ranch are such that B is 8 km directly East of A and C is 6km from B on a bearing of 30 degree.D is 7km From on a bearing of 300 degree. (a) the bearing of A and D; (b) the distance BD in kilometers. (C) the perimeter of the

53. math

in figure AB = 11 cm, BC = 8cm, AD = 3 cm, AC 5cm and A DAC is a right angle. the area of the quadrilateral ABCD

54. Math

The corner A, B, C and D of a ranch are such that B is 8 km directly East of A and C is 6km from B on a bearing of 30 degree.D is 7km From on a bearing of 300 degree. (a) the bearing of A and D; (b) the distance BD in kilometers. (C) the perimeter of the

55. Math

In the figure AB = 11cm, BC = 8cm, AD = 3cm, AC = 5cm and DAC is a right angle. The size of ADC; The size of ACB; The area of the quadrilateral ABCD.

56. Math

A bag contains the two tiles shown. One tile is drawn at random from the bag. The tile is returned to the bag and again a tile is drawn from the bag. What is the sample space for this experiment? A. {L, M} B. {LL, LM, MM} C. {LL, LM, ML, MM} D. {L}

57. riddle

what 5 letter word, when all capitalized, reads the same way upside down.

58. Math

A solid S is made up of a cylindrical part and conical part. The height of the Soild is 4.5m. The common radius of the cylindrical part and the conical part is 0.9m. The height of the conical part is 1.4m. b. Calculate the total surface area of soild S.

59. Math

Use the mid ordinate rule with 6 strips to find the area bounded by the curve y = x^2 + 1, x = -4, x = 8 and x-axis

60. unscramble grammar

I need help descrambling 2 sentences: 1 - insects plant eat plants birds snakes flying and eat lice eat birds 2- right nations set them will in africa new working for just governments that be up are to

61. Math

Two lines L1: 2y - 3x - 6 = 0 and L2: 3y + x - 20 = 0 interest at a point A. (a) find the coordinates of A. (b) A third line L3 is perpendicular to L2 at point A. Find the equation of L3 in the form y = mx + c. (c) Another line L4 is parallel to L1 and

62. Math

In the figure AB = 11cm, BC = 8cm, AD = 3cm, AC = 5cm and DAC is a right angle. (a) length DC; (b) the size of ADC; (c) the size of ACB; (d) the area of the quadrilateral ABCD.

63. Math

A solid S is made up of a cylindrical part and conical part. The height of the Soild is 4.5m. The common radius of the cylindrical part and the conical part is 0.9m. The height of the conical part is 1.4m. a. Calculate the volume,correct to 1 decimal

64. Math

A solid S is made up of a cylindrical part and conical part. The height of the Soild is 4.5m. The common radius of the cylindrical part and the conical part is 0.9m. The height of the conical part is 1.4m. c. A square base pillar offside 1.6m has the same

65. Math

Use the mid ordinate rule with strips to find the area bounded by the curve y = x^2 + 1, x = -4, x = 8 and x-axis

66. Math

A school intended to buy a certain number of chairs for sh 16200. The supplier agreed to offer a discount of sh 60 per chair which enabled the school to get 3 more chairs. Taking x originally intended number of chairs. Write an expressions in term of x

67. Astronomy

Few question about astronomy: 1.how many centimetres is equivalent to a light-nanosecond 2. How long is an astronomical unit (AU) in light-minutes (1min, i.e., the distance that light travels in a vacuum in one minute)? Please show the calculation if there

68. Math

A U.S. company sells products to a Dutch company and will receive payment of €550,000 in three months. At the time of sale, the spot rate of the euro was \$1.25, and the 90-day forward rate was \$1.21. At the time of sale, the U.S. company negotiated a

69. Math

In the triangle ABC., BC = 12cm, ABC = 80 degree and ACB = 30 degree Calculate the area of triangle ABC.

70. Math

David and Sammy had each 840 tree seedlings. David planted equal number of seedlings per row in x rows while Sammy planted equal number of seedlings in (x + 1) rows. The number of tree seedlings planted by David in each row were 4 more than those planted

71. Math

David and Sammy had each 840 tree seedlings. David planted equal number of seedlings per row in x rows while Sammy planted equal number of seedlings in (x + 1) rows. The number of tree seedlings planted by David in each row were 4 more than those planted

72. Math

A trade bought corn for sh 20 per kilogram and beans for sh 60 per kilogram. She mixed the corn and beans and sold the mixture at sh 48 per kilogram. If she made a 60% Profit, determine the ratio corn: beans per kilogram in the mixture.

73. Math

A construction company employs technicians and artisans. One a certain day 4 technicians and artisans were hired and paid a total of sh 9000. On another day the firm hired 4 technicians and 1 artisans and paid a total of sh 9500. Calculate the cost of

74. algebra

Katydid population is modeled by N(t) = 50 / 1+9e^ -.33t where t is number ofyears and N(t) is population is thousands at time t. when will katydid population reach 40,000?

In the story Molly McGinty Has A Really Good Day- Where did they find the notebook??

76. Math

The corner A, B, C and D of a ranch are such that B is 8 km directly East of A and C is 6km from B on a bearing of 30 degree.D is 7km From on a bearing of 300 degree. (a) the bearing of A and D; (b) the distance BD in kilometers. (C) the perimeter of the

77. Math

A trade bought corn for sh 20 per kilogram and beans for sh 60 per kilogram. She mixed the corn and beans and sold the mixture at sh 48 per kilogram. If she made a 60% Profit, determine the ratio corn: beans per kilogram in the mixture. cost: 20c+60b

78. Math

Given that A = (3 x, x+1 2) and B =(1 2, 3 0), find value of x for which AB is a singular matrix.

79. Math

Convert 2pi^c /9 into degrees = 2pi^c/9 * pi/180

80. Math

The education of a curve is given as y = 2x^3 -9/2 x^2 -15x + 3. Find the value of y when x = 2

81. Algebra 1

There are three times as many finches as mockinigbirds. If there are 48 birds, how many mockingbirds are there?

82. Math

Want to make a dog run. Have 199.4 feet of fencing and the garage is 19.2 feet wide. How long will the run be?

what five letter word, when all capitalized, reads the same way upside down?

1. Algebra

(6x + 1)(x -4)

posted on May 10, 2019
2. Math

How did you got base 50 and hy :230

posted on April 29, 2019
3. Math

So aera =1/2(AB)(BC)sin(ACB)

posted on September 19, 2018
4. Math

6x = 180 x = 30

posted on September 14, 2018
5. Math

sin70/a = sin80/12

posted on September 12, 2018
6. Math

How did you got 8/5?

posted on September 5, 2018
7. Math

Use the mid ordinate rule with 6 strips to find the area bounded by the curve y = x^2 + 1, x = -4, x = 8 and x-axis

posted on September 3, 2018
8. Math

3x + 2y = 9000 4x + y = 9500 y = 9500 - 4x 3x + 2(9500 - 4x) = 9000 3x + 19000 - 8x = 9000 -5x = - 10000 x = 2000 y = 9500 - 8000 y = 1500

posted on August 31, 2018
9. Finance

i do not know

posted on October 13, 2017
10. chemistry

1.00 M is the concentration. M=mol/L which is concentration. 9.25 is correct!

posted on March 24, 2017
11. Math

Yes

posted on December 5, 2016
12. Math

Is it 1/3

posted on December 5, 2016
13. Physical Anthropology

did you ever figured out the answer

posted on October 1, 2015
14. math

15-4*7=-13

posted on June 2, 2014
15. Math

A{L,M}

posted on June 2, 2014