# Raquel

Most popular questions and responses by Raquel
1. ## Physics AP

A 32 kg child goes down a straight slide inclined 38∘ above horizontal. The child is acted on by his weight, the normal force from the slide, and kinetic friction. How large is the normal force of the slide on the child?

2. ## Math

A children's park is 350m long and 200 m wide. It is surrounded by a pathway of uniform wittd. Suppose the total area of the park and the pathway is 74,464 meter square. How wide is the pathway?

3. ## Chemestry

What is the van't Hoff factor for K2SO4 in an aqueous solution that is 5.00 % K2SO4 by mass and freezes at -1.21 ∘C?

4. ## physics

a billiard ball rolling across a table at 1.50m/s makes a head on collision with an identical ball. find the speed of each ball after the collision;when the ball is at rest;when the 2nd ball ]is moving towards the first at the speed of 1.0m/s; when the

5. ## Physics

A sprinkler mounted on the ground sends out a jet of water at a 30 ∘ angle to the horizontal. The water leaves the nozzle at a speed of 11 m/s . How far does the water travel before it hits the ground?

6. ## math

Gary has \$1.56 in change in his pocket. if there is a total of 19 coins, how may quarters, dimes, nickeland pennies does her have?

7. ## Algebra

A boat travels 28 km upstream in 7 hours. It travels 48 km downstream in 4 hours. Find the speed of the boat and the speed of the stream.

8. ## Algebra

A laboratory technician wishes to mix a 70% saline solutio and a 20% solution to prepare 500ml of a 40% solution. What amount of each solution should be used?

9. ## math

round 749 to the nearest hundred

10. ## Physics

The average intensity of sunlight at earth's surface is approximately 1400 W/m^2 , if the Sun is directly overhead. The average distance between the earth and the sun is 1.50E11 m. What is the average power emitted by the Sun? Ok so intensity is power over

11. ## Algebra

An ordinary plane leaves an airport and flies due west at 180kph. Two hours later, a jet leaves the same airport and flies due west at 900kph. How far from the airport will the jet overtake the ordinary plane?

12. ## physics

On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free-fall acceleration on the moon is 1/6 of its value on earth. Suppose he hit the ball with a speed of 25 m/s at an angle 24 ∘

13. ## Math

The difference between a number and its reciprocal is 7/12. Find the number.

14. ## Physics

A car traveling at 40 m/s runs out of gas while traveling up a 7.0 ∘ slope How far will it coast before starting to roll back down?

15. ## Physics

There are competitions in which pilots fly small planes low over the ground and drop weights, trying to hit a target A pilot flying low and slow drops a weight; it takes 1.6 s to hit the ground, during which it travels a horizontal distance of 160 m . Now

16. ## Calc 3

A wrench .9m long lies along the positive y-axis, and grips a bolt at the origin. A force is applied in the direction of (0,1,3) at the end of the wrench. Find the magnitude of the force in newtons needed to supply 100 J of torque to the bolt. This is the

17. ## Science

What were Mendeleev's reversals?How did Henry Moseley explain them? Mendeleev thought the periodic table was in order of atomic mass. Mosley determined that atomic number was the correct order. http://www.chemistry.co.nz/henry_moseley.htm

18. ## Algebra

A boat can travel 48 miles downstream in 4 hours and can make the return trip in 6 hours. Find the speed of the boat in still water.

19. ## Math

If a 6-foot man has a shadow of 9 feet, how long a shadow would a 20-foot pole have?

20. ## Algebra

The ticket prices for a movie are shown in the illustration. Receipts for one showing were \$1,990 for an audience of 215 people. How many general admission tickets and how many senior citizen tickets were sold? (General admission tickets: \$10 Senior

21. ## Physics

A small plane is 150 km south of the equator. The plane is flying at 150 km/h at a heading of 30∘ to the west of north. how many minutes will the plane cross the equator?

22. ## Math

Two numbers differ by 6. The sum of their squares is 116. Find the biggest number.

23. ## Math

A wire measures 137 centimeters in length. The shorter piece is 13 centimeters short. find the of length each piece.

24. ## Algebra

Triangle DOG is congruent to triangle CAT, DO=5, OG = 6, DG = 7 and CA = 2x + 1. Find x

25. ## Math

Explain how you know if a number can be divided by 10 evenly.

26. ## Math

Two sides of a triangle are 8cm and 12cm long, and the altitude to the 8-cm side is 9cm. How long is the altitude to the 12-cm side?

27. ## Physics

A rifle is aimed horizontally at a target 50 m away. The bullet hits the target 2.4 cm below the aim point What was the bullet's speed as it left the barrel? Express your answer to two significant figures and include the appropriate units

28. ## trigonometry

A 15-foot ladder is resting against a wall and makes an angle of 48 degree's with the ground. Find the height to which the ladder will reach on the wall

29. ## Algebra

Rosa is 14 years older than her sister Amy. 3 years ago, she was 3 times as old as Amy. How old are they now?

30. ## Algebra

A woman invested some money at 8% and some at 9% annual simple interest. The interest for 1 year on the combined investment of \$10,000 was \$860. How much was invested at each rate?

31. ## Math

Tom can clean the living room in 45 minutes. Wally can clean it in 30 minutes. Both start cleaning and 5 minutes later their sister Gigi joins them taking them 7 minutes more to finish. How long would it take Gigi to clean the living room alone?

32. ## physics

0.1kg of ice initially at a temperature of -10 degrees Celsius is added to a cup with .5kg of water initially at 20 degrees Celsius. The water and ice are isolated thermally from their surroundings. The specific heat of ice is 2000 J/kgoC, the specific

33. ## English

Charollets Web How did Wilbur respond to the lamb saying "Pigs mean less than nothing to me"

34. ## Math

A boat traveled 36 mi up a river in 3 hours, returning downstream, the boat took 2 hours. What is the boat's rate in still water and what is the rate of the river's current?

35. ## Math

What is 7r + -5

36. ## Math

A salmon swims 15 miles downstream from its birth to the ocean in 3 hours. The return trip upstream to spawn takes 5 hours. How fast does the salmon swim in still water?

37. ## Marh

An ordinary plane leaves an airport and flies due west at 180kph. Two hours later, a jet leaves the same airport and flies due west at 900kph. How far from the airport will the jet overtake the ordinary plane?

38. ## Math

If two inlet pipes are open, they can fill a pool in 1 & 12 minutes, one of the pipes can fill the pool itself in 2 hours. How long will it take the other pipe to fill the pool by itself?

39. ## physics

A rifle is aimed horizontally at a target 50 m away. The bullet hits the target 2.4 cm below the aim point. Part A What was the bullet's flight time? Neglect the air resistance Part B What was the bullet's speed as it left the barrel?

40. ## Math

A figure is made of a row of squares. One square has a perimeter of 4. Two squares have a perimeter of 6, and so on. Finish the input-output table to show the pattern.

41. ## Math

A natural number decreased by 30 times its reciprocal is 1. Find the natural number.

42. ## Math

An airplane travels 1260km in the same time a car travels 420km. If the rate of the car is 120kph less than the rate of the airplane, find the rate of each.

43. ## Algebra

A rectangular-shaped dance floor has a perimeter of 164 feet. If the floor were 44 feet wider, its width would equal its length. Find the length and width of the dance floor.

44. ## Math

Sarah has 10 stuffed animals. Explain two different ways she can group the stuffed animals so each group has the same number and no stuffed animals are left over.

45. ## Math

There are 18 students in the classroom. There ate 2 students in each group. How many groups of students are there?

46. ## MAth

The sides of a triangle are 15cm, 20cm, and 28cm. How long are the segments into which the bisector of the largest angle separates the opposite side?

47. ## Math

A carpenter is to use 12m of wood to construct a picture frame.what is the maximum area of the frame

48. ## Math

In an automobile race, the rate of one car was 120 mi/hr and the rate of another was 105 mi/hr. If the faster car finished the race 20 minutes before the slower one, what was the distance of the race?

49. ## Algebra

A merchant wants to mix gummy worms worth \$7 per pound and gummy bears worth \$3 per pound to make 30 pounds of a mixture worth \$4.60 per pound. How many pounds of each type of candy should he use?

50. ## Math

A Square shaped animal pen and a pen shaped like an equilateral triangle have an equal perimeters. Find the length of the sides of each pen if the sides of the triangular pen are 16 less than twice a side of the square Pen.

51. ## Math

A university drama production sold a total of 400 tickets for P18,500. If student tickets sold for P40 & guest tickets for P60, how many tickets of each type?

52. ## Math

One positive integer is three moee than twice another and their sum is greater than 65 but less than 75. What pairs of integers satisfy this conditions?

Based on this problem: "Wayne owns a shaved ice stand. He sells 700 shaved ice cups per month at \$1.50 each, making the total revenue \$1,050. Each shaved ice costs Wayne \$0.50 and he has fixed costs of \$750, making his total costs \$1,100. Therefore, he

54. ## math

round to the nearest ten and hundred. 997

55. ## Math

Eight students tried out for the band or chorus. Five students tried out for band, and the rest tried out for the chorus. How mwny students tried out for the chorus?

56. ## Global History

What was the role of the Nazi party? Why were Jews denied citizenship?

57. ## Math

The square of a certain integer plus three times itself equals 18. Find the integer

58. ## ALgebra

Three years ago, Wendy's age was 3/4 as old as Erna and Lucys age was 2/3 as okd as Erna. If the sum of their ages is 67, find the present age of each.

59. ## Algebra

In an automobile race, the rate of one car was 120 mi/hr and the rate of another was 105 mi/hr. If the faster car finished the race 20 minutes before the slower one, what was the distance of the race?

60. ## Math

Eric has 48 bills valuing P1,500 to be deposited in a bank. If the bills consistedmof P20 & P50 bills, how many P50 bills does he have?

61. ## science

The measure of how much material makes up an object is the?

62. ## Science

Compare and contrast a desert ecosystem and a forest ecosystem.

63. ## math

round to the nearest thousand 9612

64. ## math

round to the nearest tens. 646

65. ## math

Doug has 170 stamps in his two-book collection. his first book of stamps has 30 more stamps in it than his second book. How mwny stamps are in each book?

66. ## Math

cos22.5=1/2 sqrt(A + sqrt B)

67. ## Math

Given triangleABC proportion to trianglePQR. If AB=4cm, BC=6cm, AC=9cm, and QR=4cm, find the perimeter of trianglePQR. What is the ratio of similitude?

68. ## Math

A manufacturer is in the business of producing small figurines. He finds that the daily cost in pesos,P, of producing n figurines is given by P= n2-120 +4200. How many figurines produced per day so that the cost will be minimum?

69. ## Math help

If y = 3 is a horizontal asymptote of a rational function, which must be true? A) lim x→ 3 f(x) = 0 B) lim x→ 0 f(x) = 3 C) lim x→ ∞ f(x) = 3 D) lim x→ 3 f(x) = ∞ My answer is B

70. ## Algebra

120t = 105 (t+1/3) Find the disrance

71. ## Math

An airplane travels 1260km in the same time a car travels 429km. If the rate of the car is 120kph less than the rate of the airplane, find the rate of each.

72. ## Math

One positive integer is three moee than twice another and their sum is greater than 65 but less than 75. What pairs of integers satisfy this conditions?

73. ## Math

Mother has P1 coin, P5 coins and P10 bill in her purse. In all, she has P112. She has two more P1 coin than P5 coins and one More P10 bills than P1 coins. How many of each kind does she have?

74. ## Math

Ricky has 16 coins consisting of P5 & P1 coins amounting to P44. How many of each kind does he have?

75. ## Math

Ricky has 16 coins consisting of P5 & P1 coins amounting to P44. How many of each kind does he have?

76. ## Math

Sarah has 10 stuffed animals. Explain two different ways she can group the stuffed animals so each group has the same number and no stuffed animals are left over?

77. ## Algebra

How do I solve this algebra questions, 2n+4n+4=-8, 9=5+4t, at+2=12, 2x+3=7, 3b+6=12, m/6+5=7????

78. ## Math

Sophia went to an amusement park. She went on 18 rids in all. 7 of the rides were roller coasters. How many of the rides Sophia went on were not roller coasters?

79. ## math

round to the nearest tens 362

80. ## science

A room has large windows without curtains. The sunlight makes the room bright, but no one can see in. Is the glass opaque, translucent, or transparent?

81. ## math

If 0 less than x less than y and x over y = r, which of the following must be equal to (x + y) over x ?

82. ## trig

find cos (x/2) when sint =12/13

83. ## psy202

•provide an example of how one domain of development impacts the other two.

84. ## maths

factorise: d2 + 2d + 1 - e2

85. ## Mathematics

How do i solve the pair of simultaneous equations y=x^2-3x-12 and y=2x-16 and epxress y=x^2-3x-12 in the form y=(x-h^2)+k, where h and k are constants Hence determine the minimum value of the function y=x^2-3x-12 I have a few of these to do, so if someone

86. ## Math

Given triangleABC proportion to trianglePQR. If AB=4cm, BC=6cm, AC=9cm, and QR=4cm. What is the ratio of similitude?

87. ## Math

Given triangleABC proportion to trianglePQR. If AB=4cm, BC=6cm, AC=9cm, and QR=4cm, find the perimeter of trianglePQR

88. ## Math

If AB//CD//EF, BD=12cm, DF=16cm and AE=35cm, find AC

89. ## Math

In trianglePQR, if AB//QR, PA=3cm, PQ=8cm, and QR=9cm, how long is AB?

90. ## Geometry

Two sides of a triangle are 8cm and 12cm long, and the altitude to the 8-cm side is 9cm. How long is the altitude to the 12-cm side?

91. ## Math

What should be the value of x so that the ratios 4:10 and x:12 will form a proportion

92. ## Math

If a=25cm and b=2meters, what is the ratio of a to b?

93. ## Math

What number or numbers are equal to thrice their own square root?

94. ## MaTh

find the value Of k of the product pf the roots of 2x square - 6x + k = 0 is 4.

95. ## Algebra

TriangleWED is congruent to triangle FRI, angle W = 80degrees, angle D = 45 degrees, angle E = 55 degrees and angle R = 4x + 10. Find x

96. ## Math

Not counting the "turn around" , a helicopter carrying passengers between an airport and the roof of a downtown skycraper 20 miles away can make the round trip in 15 minutes. The helicopter flies 2 miles away with the wind when the time it flies 1 mile

97. ## Math

A motorboat travelling at full speed against a current goes 15 miles in one hour. Travelling at half speed with the current, it goes 12 miles in an hour. Find the rate of the current.

98. ## Math

The air speed of a plane is 150 mph. If the plane traveled the same distance in two hours with the wind as it flew in 3 hours against the wind, what was the wind speed?

99. ## Math

Not counting the "turn around" , a helicopter carrying passengers between an airport and the roof of a downtown skycraper 20 miles away can make the round trip in 15 minutes. The helicopter flies 2 miles away with the wind when the time it flies 1 mike