# HELP

Popular questions and responses by HELP
1. ## math

I need help!!!! Write an expression describing all the angles that are coterminal with 127° . (Please use the variable "k" in your answer)

an athlete stretches a spring an extra 40.0 cm. how much energy has he transferred to the spring, if the spring constant is 5286.0 N/m? Us= 1/2kx^2 =1/2(5286.0)(.40)=1057.2 J Thanks!

3. ## math

A standard deck of cards has 52 cards divided into 4 suits, each of which has 13 cards. Two of the suits (\$\heartsuit\$ and \$\diamondsuit\$, called `hearts' and `diamonds') are red, the other two (\$\spadesuit\$ and \$\clubsuit\$, called `spades' and `clubs')

4. ## world history

Which option most accurately explains the impact of the First Agricultural Revolution? Early humans ate more foods high in protein and low in starch and grains. Early humans created new social cultures, including laws and inventions. Early humans began to

5. ## Math

Assume that women’s heights are normally distributed with a mean of 63.6inches and a standard deviation of 2.5inches. If 90 women are randomly selected, find the probability that they have a mean height between 62.9inches and 64.0inches.

6. ## physics

Two workhorses tow a barge along a straight canal. Each horse exerts a constant force of magnitude F, and the tow ropes make an angle θ with the direction of motion of the horses and the barge. (Figure 1) Each horse is traveling at a constant speed v. How

7. ## physics

a 3.5 kg block is accelerated from rest by a compressed spring of spring constant 640 N/m. The block leaves the spring at the springs relaxation length.The block then travels over a horizontal floor with coefficient of kinetic friction 0.25. The friction

8. ## math

There are 5 blue chips, 4 red chips and 3 yellow chips in a bag. One chip is drawn from the bag. That chip is placed back into the bag, and a second chip is drawn. What is the probability that the two selected chips are of different colors? Express your

9. ## Maths

Given that 3^9 + 3^12 + 3^15 + 3^n is a perfect cube number. Calculate the value of n.

10. ## Math

the 64 people who answered "yes" to a question, 6 were male. Of the 70 people that answered "no" to the question, 8 were male. If one person is selected at random from the group, what is the probability that the person answered "yes" or was male?

11. ## Math

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 6, Q1 at 7.5, median at 8, Q3 at 23, max at 32.5 The mean, because the data distribution is symmetrical The median, because the data

12. ## math

1,5,11,19 (a) calculate next two patterns (b) calculate the nth term of the pattern (c)which term of the pattern is equal to 2549. thanks a lot

13. ## MATHS

A boy spent 1/4 of his money on sweets and 3/8 on bus fares. What fraction of his money is left?

14. ## Math

An alloy is composed of nickel, zinc, and copper in a ratio of 3:4:13. How many kilograms of each metal are needed to make 4 kg of this alloy?

15. ## calculus

find the function that is finally graphed after the following transformations are applied to the graph of y=square root x in the order listed. a. reflected about the y-axis b. shift down 3 units c. shifht left 9 units please show work

16. ## physics

Cars A and B are racing each other along a straight path in following manner: Car A has head start and is a distance dA beyond starting line at t=0. The starting line is at x=o. Car A travels at constant speed vA. Car B starts at starting line but has

17. ## World History

How did the Industrial Revolution introduce justifications for imperialism? (Select all that apply.) Industrialized nations sought to bring technological knowledge to Africa and Asia. Industrialized nations sought colonies to deport people who would work

18. ## Algebra

find the measure of an angle whose supplement measures two times its measure

19. ## Communication

1.) Song Xue, a Chinese exchange student, tells his mother during a telephone conversation that he is enjoying his time in America but Americans are loud. What element of forming supportive messages has Song Xue forgotten? A.) ask questions B.) demonstrate

20. ## Physics!!!

A 24-V battery is connected in series with a resistor and an inductor, with R = 5.6 Ω and L = 2.0 H, respectively. (a) Find the energy stored in the inductor when the current reaches its maximum value. (b) Find the energy stored in the inductor one time

21. ## Spanish

PLEASE HELP ME! Will make as brainliest! Much appreciated. 1. A celebration in the countryside in which family and friends get together in Cuba is known as a _______. (1 point) Habana Vieja guateque campesino trovadores cocotaxi 2. La Habana Vieja's annual

22. ## math

Which point is located at (– 3 , – 2)?

23. ## physics

You are a member of an alpine rescue team and must get a box of supplies, with mass 3.00kg , up an incline of constant slope angle 30.0∘ so that it reaches a stranded skier who is a vertical distance 2.90m above the bottom of the incline. There is some

24. ## history

What role did nativism play in federal policy? A. Concern for immigrants' children led to increased public education funding. B. Concern about living conditions led to construction of public housing. C. Concern about conditions in factories led to more

25. ## Social Studies

1. What negative impact did gold and silver mining have in the west? I think it would be Ghost towns were left behind after the mines stopped producing. Is this right?

26. ## Language Arts

"Phoebe turned to me with a puzzled expression on her face. I think that she was surprised at what she said but I new exactly why she lied. It was easier sometimes. " Which type of conflict best characterizes the events in the passage? ^^ -character vs.

27. ## probability

13 people study French, 15 people study German and there are 21 people in total. What is probability to chose person who takes both of the languages?

28. ## english

13. Which of the following sentences contains a comma splice? A. Our friend, who travelled from Tennessee, was quite tired when he arrived. B. We need help with organization, structure, and spelling. **C. The pots clanged to the kitchen floor, the kitten

29. ## Physics

How fast (in rpm) must a centrifuge rotate if a particle 69-cm from the axis of rotation is to experience an acceleration of 200438 g's? (can you show me how you get the answer) be thorough

30. ## chemistry

A 32.2 g iron rod, initially at 22.3 C, is submerged into an unknown mass of water at 63.9 C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 58.6 C. What is the mass of the water?

31. ## physics

state the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS 6. +0.50 DS c. +1.75 DS

32. ## math

Orlando has a bank statement balance of \$414.25 and \$5.90 service charge. His check register shows \$374.16 and he has two outstanding checks of \$26.54 and \$21.78. What is his true balance?

33. ## Math

Roni wants to write an equation to represent a proportional relationship that has a constant of proportionality equal to StartFraction 7 over 25 EndFraction. She writes the equation y = x + StartFraction 7 over 25 EndFraction. What error is Roni making? A:

34. ## Statistics

Let X1,X2,…,Xn be i.i.d. random variables with mean μ and variance σ2 . Denote the sample mean by X¯¯¯¯n=∑ni=1Xin . Assume that n is large enough that the central limit theorem (clt) holds. Find a random variable Z with approximate distribution

35. ## Math

What is the equation of the line shown on the graph? A graph is shown in the xy-plane. The x-axis is labeled as Number of Target Hits and the y-axis is labeled as Number of Points Scored. The values on the x-axis range from 0 to 18 in increments of 2 and

36. ## biology

Which of the following can result from a DNA mutation? (Select all that apply.) The DNA base-pairing rules change. The genetic information is changed. The structure and function of the proteins coded by the DNA change. A different version of the DNA

37. ## History

How did the case of Gibbons v. Ogden have an economic impact on America in the 19th century? The Supreme Court's decision allowed state laws to override federal laws when they conflicted regarding economic matters. The Supreme Court's decision allowed

38. ## Chemistry

Knowing that delta Hvap for water is 40.7 kJ/mol, calculate Pvap of water at 46 C

39. ## math

Find the coordinates of the midpoint of the segment whose endpoints are H(5, 13) and K(7, 5).

40. ## biology

Identify which of the following statements about genes is true. (Select all that apply.) Genes are "read" by tRNA. Genes hold the instructions for traits. Genes are segments on the DNA strand. Genes hold the instructions for making proteins.

41. ## English

1. Choose the answer that best matches the word in italics. Use context clues to determine the meaning of the word, if necessary. The decorations were reminiscent of autumn leaves. (1 point) leftovers made reminders symbolic 2. Choose the answer that best

42. ## Algebra 1

The weight needed to balance a lever varies inversely with the distance from the fulcrum to the weight. A 120-lb weight is placed on a lever, 5 ft from the fulcrum. What amount of weight, in pounds, should be placed 8 ft from the fulcrum to balance the

43. ## Statistics

Let X denote an exponential random variable with unknown parameter λ>0 . Let Y=I(X>5) , the indicator that X is larger than 5 . Recall the definition of the indicator function here is I(X>5)={1ifX>50ifX≤5. We think of Y as a censored version of the

44. ## World History

Which Industrial Revolution inventor improved upon the Newcomen steam engine? James Watt Eli Whitney James Hargraves Elias Howe I think its James HArgraves

45. ## math

The stem-and-leaf plot shows the test scores of a science class. Use the plot to answer the question. 1.how many students scored 78? (1 point) 1 student 2 students 3 students 4 students

46. ## math

Fair Race Portfolio Template: Functions Instructions: Follow the instructions provided in the lesson. Use this template to record your work and answers. Please submit this template to the dropbox along with any other evidence you would like to provide for

47. ## physics

Three charges lie along the x-axis. At x = 2.0m, a charge of 15x10^-6 C is fixed. At the origin, a charge of 30x10^-6 is fixed (like in question #8). Where can a third charge be placed between them so it feels no net force?

48. ## Physics

A car can decelerate at -2.47-m/s2 without skidding when coming to rest on a level road. What would its deceleration (in m/s2) be if the road is inclined at 8.7o and the car moves uphill? (Assume the same static friction coefficient.

49. ## DYNAMICS

A car has an initial speed of 25m/s and a constant deceleration of 3m/s^2. Determine thewvelocity of the car when t=4s. What is the displacement of the car during the 4-s time interval? How much time is needed to stop the car?

50. ## physics

A charge Q = -520 C experiences a downward force of 0.04 N. What is the electric field in N/C at the point where the charge is located? Take upward to be positive. I know that E=Kq/r^2 therefore E= (9.0*10^9Nm)(-520*10^-6c)/r^2 I'm not sure how to get the

51. ## Math

Use mathematical induction to prove that 5^(n) - 1 is divisible by four for all natural numbers n. Hint: if a number is divisible by 4, then it has a factor of 4. also, -1 = -5 +4 This is a take home test so I don't want the answer because I want to know

52. ## social studies

In Ancient Egypt, the pharaoh governed by relying on ____ . Just below the pharaoh were_____ , who helped the pharaoh govern Egypt. _____ kept records for Egypt's government.

53. ## biology

There is a 3:2 male-to-female ratio at the Science is Cool! lab company. Based on this ratio, which of the following could be the number of male employees and female employees at the company? 54 male employees and 36 female employees 24 male employees and

54. ## physics

What is the work done by a crane to lift a 500kg beam over a height of 50.0m? Assume the crane lifts the beam at a constant velocity.

56. ## Social Studies

What did Alexis de Tocqueville observe on his visit to the United States that reflected changes that were happening in the country during Jackson's administration? (1 point) a strict divide between rich and poor a growing spirit of democracy and equality

57. ## Math!!

1. Which two square roots are used to estimate square root 8? A. 2 and 3 B. 3 and 4 C. 4 and 9 D. 9 and 16 2. Which two square roots are used to estimate square root 42? A. 25 and 36 B. 36 and 49 C. 49 and 64 D. 25 and 64 My answers: 1. B 2. B. Am I right?

58. ## physics

consider the following: A point on the tip of a tuning fork vibrates in harmonic motion described by the equation d=10sin(ωt). 1. ω for a tuning fork that has a frequency of 535 vibrations per second. (I don't understand this question) 2. How many cycles

59. ## chemistry

2. A 350 mL buffer solution containing 0.15 M HF and 0.150 M NaF is reacted with sodium hydroxide. What mass of NaOH can this buffer neutralize before the pH rises above 4.0? If the same volume of buffer was 0.35 M in HF and 0.35 M in NaF then what mass of

60. ## mathematics

A semicircular garden bed at the botanical gardens needs to be fenced off while the seedlings are established. If the straight edge of the bed is 20.5m in length, calculate the total length of fencing needed to surround the garden bed.

61. ## Science

A student tried to solve the following problem by selecting the conversion below. What, if anything, did the student do wrong? How many moles of AgNO3 are needed to produce 6.75 moles of copper (II) nitrate Cu(NO3)2 upon reacting with excess copper (Cu)?

62. ## math

The planning committee at school has 11 members. Exactly five of these members are teachers. A four-person subcommittee with at least one member who is not a teacher must be formed from the members of the planning committee. How many distinct subcommittees

63. ## English

“Beauty is truth, truth beauty...” This phrase from John Keats’s “ode on a Grecian urn” is an example of a(n) Metaphor Simile Stanza Apostrophe** Is my answer right?

64. ## Math

Use the formula v=lwh to find the volume of a rectangular prism with following dimensions length=7 in. width=4 in. height =3 in.

65. ## Math

Which situation can be represented by the expression x plus negative 3? Choose all that apply. A.An elevator went down 3 floors. B.A person spent \$3. C.A person added 3 books to the shelf. D.The temperature dropped 3 degrees. My Answers are B and C

66. ## MATH

choose the appropriate metric unit for the mass of concrete in a section of sidewalk? a:kilogram b:milligram c:gram d:meter

67. ## Heath

1. Which digestive organ is the last organ food passes through before reaching your stomach? (1 point) pharynx epiglottis esophagus mouth 2. Starches and sugars belong to which class of nutrients? (1 point) carbohydrates fats proteins enzymes 3. A method

68. ## CALC

Find center of mass of the lamina that occupies the region D and has the given density function ρ. D is the triangular region with vertices (0, 0), (2, 1), (0, 3); ρ(x, y) = 5(x + y) mass=30 Find center of mass

This part I have: 1)Derive an equation for the bending deflection δ of the bat at B, where the ball hits the bat, in terms of the applied load, P, the span, lAB, the Young's modulus of ash, E and the moment of inertia of the cross section, I. Answer:

70. ## Mechanical behavior

An atomic force microscope cantilever, of rectangular cross section, has a length, l, of 200μm, a width, b, of 20μm and a depth, h, of 1μm. It is made of silicon nitride, which has a Young's modulus, E, of 300GPa. What is the maximum force that can be

71. ## Algebra II

If an object is propelled upward from a height of 16 ft at an initial velocity of 80 feet per sec, the its height after t seconds is given by the equation h=-16t²+80t+16, where h is in feet. after how many seconds will the object reach a height of 116 ft?

72. ## SS

The united states is the largest exporter of wheat Canada is the second largest .Today there are fewer Canadian farms. How is it possible that the number of farms has decreased but the praie provinces continue produce most of canads wheat

73. ## math

How many solutions does the system of equations have? 4x = -12y + 16 and x + 3y = 4

74. ## SS

Which of the following statements best describes the spread of Islam during the Arab conquests? A. Islam spread only within the lands conquered by Arabs. B. Everyone in conquered lands was forced to convert to Islam. === C. Few non-Arabs ever converted to

75. ## math algerbra

1. Which exponent makes the statement true? Start Fraction 1 over 5 superscript 9 baseline End Fraction equals 5 superscript question-mark baseline (1 point) 9 –9 one-ninth –one-ninth 2. y5 • y14 = (1 point) 2y19 y60 y19 2y60 3. Start Fraction w

76. ## World history

9. What evidence best supports the influence of the Moche culture on the Inca empire? A. the creation of the geoglyphs B. the existence of the road networks C. the extensive nature of Incan trade D. the worship of a sun god

77. ## Algebra

Please check all of my answers and tell me if they are right. 1. What is the simplified form of the following expression? 7m^2 + 6.5n – 4n + 2.5m^2 – n (1 point) A. 9.5m^2 + 1.5n*** B. 4.5m^2 + 1.5n C. 1.5m^2 – 4.2n D. 9.5m^2 – 1.5n 2. Simplify the

78. ## Ashley

An athlete performing a long jump leaves the ground at a 27.1 ∘ angle and lands 7.73 m away. 1). What was the takeoff speed? Express your answer using three significant figures and include the appropriate units. 2).If this speed were increased by just

79. ## Language arts

The diary of Anne frank act l and act ll Can someone please explain on bow Anne's character is developed through dialogue and stage directions?

80. ## math

the yearbook club is having a bake sale to raise money for the senior class. LArge cupcakes are sold for 1.25 and small cupcakes are .75. If 105 cupcakes were sold for a total amount of 109.75, how many large cupcakes did the yearbook club sell?

81. ## physics

A pump lifts 200kg of water per hour a height of 6.0m . Part A What is the minimum necessary power output rating of the water pump in watts? Part B What is the minimum necessary power output rating of the water pump in horsepower?

82. ## physics

What are the first, second, and third frequencies audible from a 20 cm long organ pipe when (A) only one end is open and when (B) both ends are open. The speed of sound through the air inside the organ pipe is 343m/s. (Hint: if a harmonic does not exist,

83. ## Trig

Use the half-angle formulas to come up with an exact expression for each function value below. You do not have to simplify your answers. cos(pi/16)

84. ## math

Let C = 2.32 N + 34180 represent the cost (C) of raising a child to 18 years of age, on an income (N). If the cost is \$120,000, what is the income?(

85. ## Algebra II

A projectile is thrown upward so that its distance above the ground after t sec is given by h(t)=-11t²+264t. After how many seconds does it reach its maximum height?

86. ## science

which two gases have been added to Earth's atmosphere in large amounts and are believed to have increased global warming by absorbing infrared radiation? 1. neon and argon 2. chlorine and nitrogen 3. hydrogen and helium 4. methane and carbon dioxide

87. ## maths

height=6 feet length=5 feet breadth=4 feet what is the volume of the container in liters?

88. ## chemistry

The total pressure in a 11.3 L automobile tire is 44 psi at 11°C. By how much does the pressure in the tire rise if it warms to a temperature of 29°C and the volume remains at 11.3 L?

89. ## physics

The position of a particle moving along an x axis is given by x = 15t2 - 2.0t3, where x is in meters and t is in seconds. (a) Determine the position, velocity, and acceleration of the particle at t = 3.0 s. x = m v = m/s a = m/s2 (b) What is the maximum

90. ## Math

Tara has 4 and 4 over 5 feet of rope. Part A: How many 2 over 5 foot pieces can Tara cut from the 4 and 4 over 5 feet of rope? Show your work. (5 points) Part B: Using the information in Part A, interpret the meaning of the quotient in terms of the two

91. ## math

Find the length of the segment ¯¯¯¯¯¯¯¯ M N with endpoint M at ( 2 , − 3 ) and endpoint N at (8, 5). Round your answer to the nearest tenth, if necessary.

92. ## english

Which passages from Chapters 1–3 of Don Quixote most clearly reflect parodies of chivalric stories? Select all that apply. Don Quixote, Chapters 1–3 He persuaded a good, honest country labourer, Sancho Panza by name, to enter his service as squire,

93. ## biology

Determine if the following statement is true or false. If true, choose TRUE. If false, choose the rewording that is true. According to the law of independent assortment, alleles for each gene are inherited together so that they always stay together.

94. ## biology

The following genotypes were produced in a cross. TT and Tt Identify the parent genotypes for these offspring. tt and tt TT and tt TT and Tt TT and TT

95. ## Social studies

1. What helped spread nationalistic feelings throughout Europe in the early 1800s? A. the conquests of Napoleon Bonaparte B. the social welfare programs of Otto von Bismarck C. the influence of the pope D. the unification of the German Confederation 2.What

96. ## chemistry

A calorimeter contained 75g of water at 16.95 degree Celsius. A 93.3g Iron at 65.58 degrees celsius was placed in it, giving a final temperature of 19.68 degrees Celsius for the system. Calculate the heat capacity of the calorimeter. specific heats are

97. ## English 10 ASAP

Determining the author's purpose in a text relies on (10 points) biographical information research the author used evidence in the text

98. ## History

How might Athenian democracy be considered the root of modern democratic governments?