Questions Asked onApril 23, 2013

1. AP Chem

CH3CH2NH2(aq) + H2O(l) CH3CH2NH3+(aq) + OH-(aq) Kb = 5.0e-4 Ethylamine, CH3CH2NH, a weak base reacts with water according to the equation above. A 50.0 mL sample of a ethylamine solution is found to have a pH of the solution 11.60. (a) Write the expression

2. Algebra 2

Suppose you are researching the eating habits of people your age. What sampling method could you use to find the percent of students in your grade who eat five servings of fruit and vegetables each day? What is an example of a survey question that does not

3. Statistics

Based on information from Harper's Index, 37 out of a random sample of 100 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of 100 Americans who did attend college, 41 claim that they believe in

4. Medical Billing and Coding

1. You're an outpatient coder in Dr. Smith's office. When you code procedures, you're probably using _______ codes. A. ICD-10-CM B. ICD-9-CM C. HCPCS D. CPT ANSWER 2. You're a coder who's reviewing the record of a 62-year-old woman who was admitted to the

5. Physics

Suppose that we repeat the experiment shown in the video, but we replace one of the cylinders with a cylinder that has twice the radius (and use larger containers of water). If the height of the original cylinder is \rm h, how deeply must we submerge the

6. Math Geo

Estimate the radius of a circle with the circumference of 272.2 inches. Help me with the steps please?

7. Chem

An electrochemical cell based on the decomposition of H2O2 can be constructed based on the half-reactions in the table below. Half-Reaction | Standard Reduction Potential, E° H2O2+ 2e- => 2 OH- | 0.88 V O2+ 2 H2O + 2e- => H2O + 2 OH- | -0.15 V (d)

8. Algebra 2

a) The average height of sunflowers in a field is 64 inches with a standard deviation of 3.5 inches. Describe a normal curve for the distribution, including the values on the horizontal axis at one, two, and three standard deviations from the mean. b) If

9. Chemistry

Galena(PbS) and cerussite(PbCO3)are two ores of lead. A mining company is considering which of these two ores to use for the extraction of lead. The equations for the reactions occurring are process using galena: 2PbS+3O2 ---> 2PbO+2SO2 2PbO+C ---->

10. Physics

In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used?

11. MAnagerial Economics

In the long Run Who play a dominant role. Options:- Income, Demand, Supply, Price.

12. Statistics

A sport preference poll yielded the following data for men and women. Use a 5% significance level and test to determine if sport preference and gender are independent. Sport Preferences of Men and Women Basketball Football Soccer Men 20 25 30 75 Women 18

13. earth

On the windward side of the mountain, should the relative humidity of the parcel change as it rises from 2000 m to 4000 m?

14. math

write five million two hundred eighty in standard notation

15. statistics

2. Why is it important to know the mean and standard deviation for a data set when applying the empirical rule? 3. If we are focused on 68% of the normal distribution, what percentage of the distribution is left in the upper tail only? 4. What value

16. Math

Let p and q be the roots of the polynomial mx^2 + x(2 - m) + 3. Let m1 and m2 be two values of m satisfying p/q + q/p = 2/3. Determine numerical value of m1/(m2)^2 + m2/(m1)^2. Please work the complete solution.

17. Chemistry 12

Determine the molar solubility of lead(II) iodide, PbI2, in 0.050 mol/L NaI. Ksp of PbI2 = 9.8 x 10^(-9)

18. Life Orientation

Suggest 5 recommendations on how to address the environmental problems within your community or any other community within South Africa and globally

19. physics

A particle moves through an xyz coordinate system while a force acts on it. When the particle has the position vector vector r = (2.00 m)ihat - (3.00 m)jhat + (2.00 m)khat, the force is vector F = Fxihat + (7.00 N)jhat - (5.30 N)khat and the corresponding

20. physics

A sample has a activity of 0.0065 Bq per gram of carbon. (a) Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq. (b) Evidence suggests that the value of 0.23 Bq might have

21. Chemistry

The question is: What is the molarity of the copper (II) chloride solution your teacher provided? Show calculations. Obtain the true molarity of the copper (II) chloride solution and calculate percent error. I have done this so far trying to answer the

22. physics

Consider three charges q1 = 6.0 µC, q2 = 1.8 µC, and q3 = -2.8 µC, arranged as shown below. Q1 is positive and is 3 cm away from Q2. Q2 is also positive and is 2 cm away from Q3 which is negative. (a) What is the electric field at a point 1.0 cm to the

23. Calculus

Find the relative extrema of the function f(x) = 1/2 x - sinx on the interval (0, 2 pie) please show me how you got this!!

24. Math

Suppose f(x) is a polynomial of degree of 5 and with leading coefficient 2009. Supposdm further that f(1) = 1, f(2) = 3, f(3) = 5, f(4) = 7, f(5) = 9. What is the value of f(6). The answer given in book is 241091. Please work the complete solution.

25. physics

The drawing shows three energy levels of a laser that are involved in the lasing action. These levels are analogous to the levels in the Ne atoms of a He-Ne laser. The E2 level is a metastable level, and the E0 level is the ground state. The difference

26. Social Stuides

What role did miners play in the settlement of the West?

27. physics

Three point charges lie in a straight line along the y-axis. A charge of q1 = -9.20 µC is at y = 6.60 m, and a charge of q2 = -8.00 µC is at y = -3.90 m. The net electric force on the third point charge is zero. Where is this charge located?

28. physics 2

A sample has a activity of 0.0065 Bq per gram of carbon. (a) Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq. (b) Evidence suggests that the value of 0.23 Bq might have

29. Math

A rectangular livestock pen with THREE SIDES of fencing is to be built against the barn. The fencing is 1050ft long. Find the dimensions of the maximum area that can be enclosed. What is the maximum area?

30. Social Stuides

Which problems in the 1890s led farmers to take political action?

31. chemistry

How would you figure: How much energy, in kJ, is absorbed by 23.8 g of acetone when it evaporates if its molar heat of vaporization is 32.0 kJ/mol? Acetone formula is C3H6O

32. physics

A uniform rod of mass M = 326 kg is in the shape of a semicircle of radius R = 6 m. Calculate the magnitude of the force on a point of mass m = 74 kg placed at the center of the semicircle, as shown in the figure.

33. DYNAMICS OF CATERING

Which of the following behaviors is considered acceptable table manners?

43. Statistics

The manufacturer of a new compact car claims the miles per gallon (mpg) for the gasoline consumption is mound-shaped and symmetric with a mean of 24.6 mpg and a standard deviation of 11.2 mpg. If 30 such cars are tested, what is the probability the average

44. Chem

Ca(s) + 2H+(aq) → Ca2+(aq) + H2(g) An experiment is performed to determine the volume of hydrogen gas produced when calcium reacts with excess HCl(aq) as represented by the net ionic equation above. A 0.0720 g sample of pure calcium and a solution of 1.0

45. PHYSICS

In lab, Will burns a 0.6- peanut beneath 48 of water, which increases in temperature from 22 to 46. The amount of heat absorbed by the water can be found with the equation , where is the amount of heat, the specific heat of water, the mass of water, and

46. math

An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible

A Competitive Coup in the In-Flight Magazine. When the manager for market intelligence of AutoCorp, a major automotive manufacturer, boarded the plane in Chicago, her mind was on shrinking market share and late product announcements. As she settled back to

The problems: 0.0513 grams of Al (Wt. 27.0) was reacted with excess HCI to produce H2 according to the following balanced equation: 2 Al + 6 HCI ---> 2 AlCl3 + 3 H2 a) Determine the number of moles of H2 evolved from that quantity of Al when collected over

49. World Geography

Cultures often develop along with science and ____________.

50. Mathabatha

Ways in which xenophobia impacts in our communities

51. math

An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible

52. Psychology

An essential part of scientific thinking is not only how to use statistics correctly, but also how to identify the misuse of statistics. Our textbook authors suggest that students should: Answer distrust all statistics because they convey a false

53. english

which words should be caoitalized in this sentence st. patricks day is on march 17 every day.

54. UL Lafayette

Suppose that 2000 is loaned at a rate of 9% , compounded monthly. Assuming that no payments are made, find the amount owed after 4 years.

55. physics

Kelli weighs 392 N, and she is sitting on on a playground swing that hangs 0.4 m above the ground. Her mom pulls the swing back and releases it when the seat is 1.1 m above the ground. If Kelli moves through the lowest point at 1.5 m/s, how much work was

56. Chemistry

What is the pH of a solution that is 0.0100 M in HCN and 0.0200 M in NaCN?

57. math

a map has the scale of 1 inch =80 miles.what is the actual distance,in miles,between two towns that are 4 1/2 inches apart on the map?

58. French

How do you unscramble o'ceisoubellreld.

59. Angular Resolution

An astronomer wants to determine whether or not he or she can photograph Castor and Pollux at the same time on a 5 x 8 inch plate using a lens system with a 1200 mm focal length. If the two stars are approximately 5 degrees apart, will it be possible to

if the sides of a cube are measured with an error of 2% use differentials to estimate the relative error in the volume df= 3x^2 * dx df= 3x^2 * 1/50 df= 3/50*x^2 is this right?

61. Physics

A gamma-ray photon produces an electron-positron pair, each with a kinetic energy of 275keV . What was the energy of the photon? E=in MeV What was the wavelength of the photon? wavelength in m Please help thank you!

62. algebra 1

Solve rational equation 1. 2/b-2=b/b^2-3b+2 + b/2b-2

63. Physics

21. The Mariana trench is located in the Pacific Ocean at a depth of about 10300 m below the surface of the water. The density of seawater is 1025 kg/m3. If an underwater vehicle were to explore such a depth, what force would the water exert on the

64. Chemistry

3. Using Bohr’s model of the atom, calculate the energy required to move an electron from a ground state of n = 2 to an excited state of n = 3. Express your answer in both J/photon and kJ/mol.

65. physics

A spy satellite was launched into a circular orbit with a height of 599 km above the surface of the Earth. Determine its orbital speed and period. (The mass of the Earth is 5.97 1024 kg, and the radius of the Earth is 6370 km.)

66. physics

At the instant the displacement of a 2.00 kg object relative to the origin is d = (2.00 m) ihat + (4.00 m) jhat - (3.00 m) khat, its velocity is v = - (6.20 m/s) ihat + (2.70 m/s) jhat + (2.60 m/s) khat, and it is subject to a force F = (6.00 N) ihat -

67. social studies

information on checks and balances for president, congress, supreme court\ examples for each

68. algebra

Abby Tanenbaum paddled her canoe 10 miles upstream, and then paddled back to her starting point. If the rate of the current was 3 mph,and the entire trip took 3.5 hours, what was Abby's rate (in still water)?

69. science

Why do you have to filter the Ca(OH)2 solution before loading it into the burette?

asked by ghasan younis
70. Physics

Show that 480 W of power is expended by a weightlifter when lifting a 60-kg barbell a vertical distance of 1.2 m in a time interval of 1.5 s.

71. Trigonometry

Given that cos(3x)=acos^x−bcosx is a trigonometric identity, what is the value of a+b ?

72. biology

In a natural population of outbreeding plants, the variance of the total number of seeds per plant is 16. From the natural population, 20 plants are taken into the laboratory and developed into separate true-breeding lines by self-fertilization—with

73. Math

The interquartile range of a data set is the ? of the ? quartile and the ? quartile. and........ In a box-and-whisker plot, one whisker represents about ?percent of the data.

74. Social Stuides

What changed the attitudes of Western lawmakers about giving women voting rights?

75. Math

Let p and q be the roots of the polynomial mx^2 + x(2 - m) + 3. Let m1 and m2 be two values of m satisfying p/q + q/p = 2/3. Determine numerical value of m1/ (m2)^2 + m2/(m1)^2. Please work the complete solution.

76. Physics :(( help please TT

If you've ever watched sailing, you will sometimes see a sailor hanging off the side of the boat, for example in this shot from the movie "The Thomas Crown Affair." Eventually, of course, the sailboat tips over so far that a person cannot keep it balanced.

77. physics

In the dangerous “sport” of bungee-jumping, a daring student jumps from a balloon with a specially designed elastic cord attached to his ankles. The unstretched length of the cord is 25.0 m, the student weighs 700 N, and the balloon is 36.0 m above the

asked by hook miner
78. maths

express -108a^4b^3 whole cube root in the simplest form?

79. physics

Kelli weighs 392 N, and she is sitting on on a playground swing that hangs 0.4 m above the ground. Her mom pulls the swing back and releases it when the seat is 1.1 m above the ground. If Kelli moves through the lowest point at 1.5 m/s, how much work was

80. calculus

the telephone company is planning to introduce two new types of executive communications systems that it hopes to sell to its largest commercial customers. It is estimated that if the first type of system is priced at x hundred dollars per system and the

81. chemistry

What is the final temperature of 1370 g of water, originally at 20.9°C, if it absorbs 47.6 kJ of heat?

82. environment

Name 2 institution or community organisation that are involved in surporting or giving redress to the disaster of air pollution and explain how this organisation are involved in providing a safe and healthy invironment

83. Geo math

Some flowers are being planted in a circular flower bed with a 10-foot diameter. If each flower requires 5 square feet of space, about how many flowers can be planted? What formula do I use to solve this?

84. history

what was One major reason for religion’s growing appeal in the 1950s?

85. Math

On a map John is standing at (11,11). His friend Lucy is standing at (1,11). John took 10 steps to the right. Is he standing with Lucy now?

86. math algebra

Paul Websters motorboat can travel 15 mph in still water. Traveling with the current of a river, the boat can travel 20 miles in the same time it takes to go 10 miles againt the current. Find the speed of the current.

87. Midpoint Help / Math

M(-4,-2) is the midpoint of RS. If S has coordinates (-2,5), find the coordinates of R.

88. 5th grade math (word problems)

Problem: A receipe for 4 dozen cookies requires 1 1/2 cups of flour. How much flour is needed for 1 dozen? work: 4 divided by 1 1/2 = 4/1 x 3/2 = 4/1 x 2/3 = 8/3 cups of flour Can you explain why i don't need to change 4 dozen to 48 and then divide by 1

89. math

A child’s kite is on top of a straight pine tree. A ladder is placed against the tree and touches the kite. The ladder forms a 45-degree angle with the flat ground. The base of the tree is 9 feet away from the base of the ladder. With only this

90. english

what do i capitalized in this sentence.john grisham is the author of "the street lawyer".

91. physic tecnology

Two 80n children sit together 3m from the center of a teeter-totter and are able to lift 460n that is 1m away from the fulcrum. name the simple machine that is being used inthe problem, calculate the work in,work out mechanical advantage, and the

92. Physics

An object is placed 19.6 cm to the left of a diverging lens (f = -7.84 cm). A concave mirror (f = 11.2 cm) is placed 27.3 cm to the right of the lens Find the final image distance, measured relative to the mirror (cm)

93. Science-Greenhouse Effect

I need to design a NEW model for the atmosphere that covers the shortfallsin the greenhouse model. Any suggestions?

94. Algebra

A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

95. Physics

A 43 g ice cube at 0 C is placed in 882 g of water at 81 C. What is the final temperature of the mixture? The specific heat of water is 4186 J/kg · C and its latent heat of fusion is 3.33 × 105 J/kg . Answer in units of C

96. To Sweetkay

DO NOT post entire tests or exams here. That promotes cheating. =(

97. Physics

When UV light of wavelength 295nm falls on a metal surface, the maximum kinetic energy of emitted electrons is 1.50eV. What is the work function of the metal? W0 in eV

98. physicis

A pellet gun fires ten 3.00 g pellets per second with a speed of 840 m/s. The pellets are stopped by a rigid wall. What is the average force (in newtons) exerted by the pellets on the wall?

99. math

kate cut a pizza into fourths. karl cut a pizza of the same size into sixth. After they each ate some pizza, they had the same fraction of pizzas left. What fraction of each pizza was left?

100. chemistry

When totally digested by acid and rocessed into a sample of one liter solution volume for spectroscopy, a 3.21 gram sample of alloy yeilded an absorbance of 0.288. Calculate the percent by wieght of iron in the alloy sample

101. Life orientation

Name 2 institution or community organisation that are involved in surporting or giving redress to the disaster of air pollution and explain how this organisation are involved in providing a safe and healthy invironment

190. science

If solid iodine sublimes to produce iodine gas:write down the equation for the reaction

191. maths

what is pure surd of 3/4root32?

192. math

Let x-2 be a factor of f(x)=x^3-x^2+ax+b. Find the relationship between a and b

193. geometry

Tamika draws a line that would cut a 8. square in half. She says she makes 2 smaller squares. Is Tamika Correct?

194. social science

A paragraph explaning how the swahili langauge came into being

asked by vukona ngobeni
195. us history

What was life like for nurses during the civil war and what incidents happend

196. Life Orientation

Identify and describe 3 environmental health hazards that cause ill health, crisis and or disasters

3m=12

198. Statistics

The Toylot company makes an electric train with a motor that it claims will draw an average of only 0.8 ampere (A) under a normal load. A sample of twelve motors was tested, and it was found that the mean current was x = 1.26 A, with a sample standard

199. algebra

find the vertex of 400-16tsquared

200. statistics

What is the probability that 10 of 100 apples will be < 130 g? mean=173 std deviation=34?

201. algebra

what ca be concluded from the box below x+3>7 then x+3-3>7-3 a:x-3 b:x+3-3>7-3 c:

202. Math

What is the difference between exploratory and formal studies?

203. Math

What is the difference between Descriptive and casual studies?

204. landmark project

did any workers die while building the palace of fine

205. Math

Let Alpha and Beta be the zeros of the cubic polynomial x^3 + ax^2 + bx + c satisfying the relation Alpha * Beta = 0. Prove that : c^2 + ac + b + 1 = 0. Please work the complete solution.

206. Chemistry

how many joules and calories are produced from the reaction CaCl2+H2O=HCl+CaOH

207. Math

An equilateral triangle ABC has AB=20√3. P is a point placed in triangle ABC and D,E and F are the foot of the perpendiculars from P to AB, BC and AC, respectively. If PD=9 and PE=10, what is the value of the length of PF? Please work the complete

208. Shakespeare

What are Shakespeare beliefs, attitude, time, heritage, and experiments.

209. math

i have a test tomorrow and im still not sure how to do this. can you please help me? p={a,b,c} Q={a,c,d,f} Q-P=?

210. Physics

Find the potential difference across each resistor in the figure below. (R1 = 5.24 , R2 = 3.85 , R3 = 3.30 , R4 = 2.00 ) VR1 = V VR2 = V VR3 = V VR4 = V |----|------| | | | ___ ___ ___ 12V 3V 18V - - - | | | | | | | | | R1 R2 R4 | | | |_____|_R3__|

211. math

slope = -2, passing through (0, -3) equations for each line point-slope, slope-intercept form

212. math

Submit the two equations that represent the cost of going to the gym based on if we join or do not join. Identify the number of times a person would go and have the costs of the 2 plans be the same.

213. math

Submit the two equations that represent the cost of going to the gym based on if we join or do not join. Identify the number of times a person would go and have the costs of the 2 plans be the same.

214. CHEMISTRY

You carry out a reaction with 28.9mL of 0.711M solution of NiNO3)2. The reaction has a change in H of -26.4KJ/mol rxn. What is the q, the heat of the reaction, in joules? I first found the mols of the solution using molarity and then found the joules of

215. statistics

The daily sales of a retail store are normally distributed with a standard deviation of $500. If the probability that sales will be less than$10,000 in any one day is 40%, what are the mean daily sales?

216. physics

A satellite is placed between the Earth and the Moon, along a straight line that connects their centers of mass. The satellite has an orbital period around the Earth that is the same as that of the Moon, 27.3 days. How far away from the Earth should this

217. HCS/335

the future of embryo

218. Math

Write 70,633.29 two other ways.

219. Life orientation

8 ways in which the flooding impacts within the community

220. math

what is e = mc square

221. Chemistry

What is the ph at the equivalence point for a titration of 250 mL of 0.17M piperidine with 0.17 M nitric acid. (piperidine: Kb = 1.3 x 10-3)

222. physicis

A 8.30 kg object with a speed of 34.0 m/s strikes a steel plate at an angle of 45.0 degrees with the normal to the plate, and rebounds at the same speed and angle on the other side of the normal. What is the change (in magnitude only) of the linear

223. algebra 1

What is b^2-b/2

224. Ife orientation

10 ways in which the environmental health hazard can impact negatively on one's health

225. government

What is best answer below with regard to the quantity of end items procured with a given procurement appropriation, the Secretary of Defense (1). Can authorize any quantity of items to be procured. (2). Cannot exceed the quantity specified in the defense

226. Science-Greenhouse Effect

What is the electromagnet spectrum? PLEASE ANSWER ASAP...I REALLY NEED HELP!!

227. english Ms. Sue Help Please check my answers

Jaws of the Water ACT TWO At rise we see DAD, TINA, and MARK rushing in and out of the living room. Each enters carrying important items—such as sleeping bags, rain gear, and gallons of water—sets them down, and exits. All three come in together, and

228. Physics

If in a manufacturing company they want to produce a system where the force F1 must be 10% of the output force F2.if the area of the pistol (where F1 is applied)is 450 spuare milimetre.calculate the diameter of the pistol two where F2 is an output force

229. Afrikaans

We will do a oral about intstrunent in Afrikaans,help!!,Icant write in Afrikaans.

230. Eco103

Given The demand function of a product q=f (a)= 3600-15p find the maximizes total revenue and quanty sold

231. Math

A rectangular solid has a volume of 40 cubic centimeters. If the dimensions are all reduced to 1/2 their original size, what will be the new volume of the rectangular solid?

232. Physics H

What is the speed of light moving through a medium of index of refraction 2.45?

233. 6th grade Math

I need help on the problem below. The instructions say to "factor the expression" and the expression is: -.2x^2 + 80x -6000. Thanks

234. Science-Greenhouse Effect

What actions can people take to help reduce the greenhouse effect? PLEASE ANSWER ASAP!!

235. Optics/Physics

Predict the size of the image of Jupiter if photographed at opposition with a lens having a focal length of 9600 mm. (Assume Jupiter is a disk of 1.43 x 10^5 km and is 6.29 x 10^8 km from the Earth.)

236. math

if the ratio is 1 to 6 of books sally chose and the total of books is 80 what is the amount sally chose

237. Calculus

Find the first and second derivative for f(x) = x^2 - 9 / X^2 -4 please show me how you got the answer for both

238. Algebra

Input 16 output 2 input 24 output 4 input 40 output 6 input 52 output 8 find y if x is given. X is input

239. Algebra

Input 16 output 2 input 24 output 4 input 40 output 6 input 52 output 8 find y if x is given. X is input

240. MATH

1. How would you prepare 950mlof 0.4M Nacl? 2.

241. Economics

b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?

242. Economics

b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?

243. Economics

b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?

244. Math

System A has a 10% chance of being "down", while system B has a 5% chance of being "down". What is the probability that: 1) Neither computer system will be operational. 2) Both computer systems will be operational. Thanks!

245. science

what is the product when barrium chloride react with ammonium dichromate?

246. calculus

Consider the region above the graph of y=x^2 and below the graph of y=x+2. What is the area of this region?

247. Economics

b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?

248. Science/DUE TODAY

please help!!! quick!!! How is a polar bear adapted to living in a desert? (behavioural and physical)!!! write something that is a good answer and that i can understand.

asked by Daisy Walker
249. Physics

You are a thief and you want to lower yourself from the rooftop to a second floor window, which is at a distance H=12m below the tip of the roof. You want to use a nylon rope, which has a failure stress of 400 MPa, and a Young’s modulus of 1 GPa. If you

250. math

The median score on a test is 90. Is it possible to add two more scores to the data and still have a median score of 90? Explain your answer.

251. Science

Is it possible that man may be able to colonize Neptune someday?

252. ?

Let me see if I understand how to find your grade now. So this time if there are 60 questions and you miss 15 your grade would be a 72?

253. Math

What is 2•2•2•2•1= 4987•6739

254. Math

Let Alpha and Beta be the zeros of the cubic polynomial x^3 + ax^2 + bx + c satisfying the relation Alpha * Beta = 0. Prove that : c^2 + ac + b + 1 = 0. Please work the complete solution.

255. Maths

a and b are consecutive, positive integers such that a^2−b^2>22. What is the minimum possible value of a+b?

256. MAths

4 distinct integers p, q, r and s are chosen from the set {1,2,3,…,16,17}. The minimum possible value of p/q+r/s can be written as a/b, where a and b are positive, coprime integers. What is the value of a+b?

257. algebra 2

factor 2x^3+54 I factored it to 2(x^3+27). can it be factored more or is that it?

258. Pre calc

A parabola has its vertex on the graph of the line y=3x+1 and passes through (1,10). If it is the same size,? shape, and direction as the graph of y=3x^2, find the equation (s) of all possible parabolas

259. math

ronnie swam 2.5 laps on monday and swam twice as far on tuesday how far did he swim in all?

260. Physics :(( help please TT

Ski boots are usually made with releasable bindings. This is done for safety – if you fall and your ski gets caught, the binding between the boot and the ski will release so the ski pops off rather than twisting your knee. Sometimes this leads to the

261. Life orientation

Ways in the human or environmental problem impacts on the community

262. Science-Greenhouse Effect

Described the greenhouse effect using the big idea of energy transfer?....PLease answer ASAP

263. Maths

Sketch the graph of f(x)=x^3-3x+3

264. Math

If polynomial p(x) = Ax^3 + Bx^2 + Cx + D vanishes at x = a - d, a, a + d, then prove that a^2 + D/aA > 0. Here A, B, C, D are some constant. Please work the complete solution.

265. math

order the fractions 1/3 2/5 2/9 1/3 and 4/1 from least to greatest

266. maths

express a^8b^6c^7 whole root 4 in the simplest form??

267. Life orientation

Give me 3 institutions or community organizations that are involved in giving redress to floods problems

268. Science question

A battery is not used in flashlight microwave portable radio cell phone I think microwave?

269. social studies

With regard to the quantity of end items procured with a given procurement appropriation, the Secretary of Defense: Can authorize any quantity of items to be procured. Cannot exceed the quantity specified in the defense appropriation act. Can acquire as

270. chemistry

which melts at a low temp in a solid nonelectrolyte what type of solid is it