# Questions Asked onApril 8, 2013

1. ## Chemistry

Ba(OH)2 is a strong electrolyte. Determine the concentration of each of the individual ions in a 0.700 M Ba(OH)2 solution. I know that Ba(OH)2 -> Ba + 2OH But how do I determine the concentrations? I feel like I am making this more complicated than need be

2. ## math

Graph the quadratic functions y = -2x^2 and y = -2x^2 + 4 on a separate piece of paper. Using those graphs, compare and contrast the shape and position of the graphs

3. ## Mathematics

"One number is 5 more than another. Their sum is 53. What are the two numbers?"

4. ## Statistics

The Boeing 757-200 ER airliner carries 200 passengers and has doors with a height of 72 inches. Heights of men are normally distributed with a mean of 69 inches and a standard deviation of 2.8 inches. b) assume that half of the 200 passengers are men, what

5. ## math plz help

3. The number cube shown is rolled and the spinner shown is spun. Find P(5 and blue). the number cube goes to five. the spinner has four spaces. 1 is blue 4. The number cube shown is rolled and the spinner shown is spun. Find P(an odd number and yellow).

6. ## math

. Ms. Alison drew a box-and-whisker plot to represent her students’ scores on a mid-term test. Josh received 72 on the test. Describe how his score compared to those of his classmates. (1 point)About 25% scored higher; about 75% scored lower. Everyone

7. ## Chemistry

A sample of sucrose, C12H22O11(s),contains 0.16 mol of oxygen, atoms(O). a.) What amount in moles of sucrose is in the sample? b.)How many atoms of carbon are in the sample?

8. ## Chemistry

The experimentally measured and generally accepted value for the molar volume of Na is about 23 cm3/mol. Which of the following best explains why the value calculated in Part B is significantly smaller than the measured values? Part B Answer 16.3 cm3/mol

9. ## Mathematics

"The Rag Bag is having a '20% Off' sale. A pair of pants is on sale for \$16. How much was it to begin with?"

10. ## government

what does national unity preach. mention 5 institutions that promote national unity.

11. ## Chemistry

What is the pH of a 0.1 M NaOCl solution (Ka of HOCl is 2.95 x10-8) I did: x squared/.10= 2.95x10-8 x squared= 2.95x10-9 x= 5.43x10-5 -log(5.43x10-5)= 4.27 pH However, the options I'm given are either a.) 3.74 b.) 6.47 c.) 8.23 d.) 10.27 What steps am I

12. ## Chemistry

A cell has a standard emf of +0.177 V at 298 K. What is the value of the equilibrium constant for the cell reaction a) if n=1? b) if n=2?

13. ## physics

An ideally efficient freezer cools food to 260 K. If the room temperature is 300K, how much work does the freezer consume when removing 100J heat from the food?

14. ## AP Chemistry

An unknown metal M forms a soluble compound, M(NO3)2. A solution of M(NO3)2 is electrolyzed. When a constant current of 2.5 amperes is applied for 35 minutes, 3.06 grams of the metal M is deposited. Calculate the molar mass of M and identify the metal.

15. ## Life science, history, geography, and maths literacy

I'm in grade 11 and i was wondering if you could help me with this question. I'm doing those subjects and i would love to take a career that is linked in those subjects, what would they be?

16. ## Chemistry

If the strips of MG ribbon are coated with white MgO, would this cause the mass of Mg that you calculate to be too high or too low? Why?

17. ## Alg 1

Factoring to solve quadratic equations: Use the Zero-Product Property to solve each equation. Write your solution in roster form: The volume of a storage tub shaped like a rectangular prism is 24 ft^3. The height of the tub is 3 feet. The width is w feet

18. ## Chemistry

The Ksp for nickel(II) hydroxide is 5.47E-16. What is the base dissociation constant for nickel(II) hydroxide? So I started off doing Ni(OH)2 (s) Ni2+ (aq) + 2OH- (aq) I ..........................0 .................0 C ........................+x

19. ## Middelsworth

1. You flip a coin 30 times and get heads 11 times, so the chance of getting heads is . Is this an example of theoretical or experimental probability? (1 point)theoretical experimental 2. You have made 3 out of 10 of your last free throws. How many free

1. Which of the following is an example of a dependent event? flipping two coins rolling a number cube and spinning a spinner choosing two scoops of ice cream **choosing a cookie at random, eating it, and then choosing another at random 2. Which of the

21. ## physical

STATE 4 facts and fallacies abt the effect of sports participation on women reproduction

22. ## physics

A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +2.7. What is the magnification when the convex side is used as a mirror, the object remaining the same distance from the mirror? If the object is

23. ## Physics AP

An ideal monatomic gas expands isobarically from state A to state B. It is then compressed isothermally from state B to state C and finally cooled at constant volume until it returns to its initial state A. How much work is done on the gas in going from B

24. ## Chemistry

Instead of a strip of pure Mg ribbon, you are accidentally given a strip of an aluminum-magnesium alloy. You calculate the mass of the strip as above. Would the mass of the strip be higher or lower than expected? Write the appropriate chemical equations

25. ## Chemistry

The half-equivalence point of a titration occurs half way to the end point, where half of the analyte has reacted to form its conjugate, and the other half still remains unreacted. If 0.220 moles of a monoprotic weak acid (Ka = 5.7 × 10-5) is titrated

26. ## Chemistry

If your partner did not take into account the vapor pressure of water when calculating the moles of hydrogen produced, would the mass of Mg that was calculated at the end of the experiment be too high or too low? Why?

find two positive number X and Y such that their sum is 35 and the product X2 Y5 is maximum?

28. ## Statistics

Events and are mutually exclusive. Suppose event occurs with probability and event occurs with probability . Compute the probability that occurs or does not occur (or both). Compute the probability that either occurs without occurring or and both occur.

29. ## Biochemistry

In yeast, ethanol is produced from glucose under anaerobic conditions. What is the maximum amount of ethanol (in millimoles) that could theoretically be produced under the following conditions? A cell-free yeast extract is placed in a solution that

30. ## math

There are 6 pizzas for 8 people. If the pizzas are divided equally, how much pizza will each person receive?

31. ## physics

A 20.0-m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder 4.00 cm in diameter. A strong wind bends the pole much as a horizontal force of 900 N exerted at the top would. How far to the side does the top of the pole flex?

32. ## chemistry

A sample of solid sulfur is heated with an electrical coil. If 105 joules of energy is added to a 12.4 gram sample initially at 24.4°C, what is the final temperature of the sulfur?

33. ## physics

A string of 15 identical Christmas tree lights are connected in series to a 127 V source. The string dissipates 58 W.What is the equivalent resistance of the light string? Answer in units of Ω

34. ## science

1. _____ is the chemical reaction in cells that needs oxygen to release energy and produces carbon dioxide and water as waste. (1 point) Breathing Exhaling Inhaling Respiration 2. Lungs are masses of _____, grapelike clusters of tiny sacs that are

35. ## physics

A box of books weighing 314 N is shoved across the floor by a force of 475 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.53, how long does it take to move the box 5.00 m starting from rest? What

36. ## Chemistry

2Mg + O2 ¨ 2MgO How many grams of MgO are produced when 79.5 grams of O2 react completely with Mg according to this equation?

37. ## Chemistry

1. Calculate the pH of a buffer solution that contains 0.32 M benzoic acid (C6H5CO2H) and 0.17 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] Round your answer to two places past the decimal. 2. A solution is prepared by mixing 470 mL

38. ## physics

A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = -28.0 cm). An object is placed to the left of the converging lens, and the final image produced by the two-lens combination lies 20.3 cm to the left of the diverging

1. The speaker’s use of many exclamation points and imperative statements in “Beat! Beat! Drums!” helps readers feel the tone’s (Points : 3) humor. urgency. quiet calm. high spirits. 2. With what kind of life are the images in the second stanza of

40. ## physics

A string of 15 identical Christmas tree lights are connected in series to a 127 V source. The string dissipates 58 W.What is the equivalent resistance of the light string? Answer in units of Ω

41. ## World Geography

1. The Polish economy began to grow in the 1990s because the government A. built more state-owned factories. B. controlled prices better.

42. ## Math

For each 10-degree adjustment on your water heater thermostat, you can reduce carbon dioxide emissions by 500 pounds a year. By how many pounds will you reduce your carbon dioxide footprint if you turn down your water heater thermostat from 140¢ªF to

43. ## calculus

if a ball is thrown vertically upward with an initial velocity of 48 ft/s, then its height, s, after t seconds is given by s(t)= 48t-16t^2. a) what is the velocity of the ball after 1 second? b) when does the ball hit the ground? c) with what velocity does

44. ## life orientation

five ways in which xenophobia problem impact on the community

45. ## Chemistry

1. Calculate the pH of a buffer solution that contains 0.32 M benzoic acid (C6H5CO2H) and 0.17 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] Round your answer to two places past the decimal. 2. A solution is prepared by mixing 470 mL

46. ## Chemistry

given that: delta H [Cl(g)]=121.3 kJ*mol^(-1) delta H [C(g)]= 716.7 kJ*mol^(-1) delta H [CCl(subscript 4)(g)] =-95.7kJ*mol^(-1) calculate the average molar bond enthalpy of the carbon-chlorine bond in a CCl(subscript 4) molecule.

47. ## trig

if sin 41'=m. write m in terms of cos 41'

48. ## physics

A long horizontal wire carries a current of 48A . A second wire, made of 2.6mm diameter copper wire and parallel to the first, is kept in suspension magnetically 15cm below(Figure 1) . Determine the magnitude of the current in the lower wire.

49. ## Chemistry

A sample of iron reacted with hydrochloric acid. The liberated hydrogen occupied 40.1 mL when collected over water at 27 C at a barometric pressure of 750 torr. What is the mass of the sample of iron? (Because of the collection of gas over water, the vapor

50. ## science

Suppose you hang an object of weight W by a string from a hanging spring scale, such as the kind used in some grocery stores. You then hang the scale with the object from the ceiling of an elevator. When the elevator is standing still, the scale will read

This is what I have to do "Draw a map of mainland U.S.A. and show (draw)how the mississippi river divides the country (part of the labeling) and label both sides correctly." I was wondering if you can find me a map that way I can start it off like how

52. ## calculus

a spherical balloon's radius was measured to be 30 cm with a maximum possible error of 0.2 cm. a) use differentials to estimate the maximum error in the calculated volume. b) what is the relative error?

53. ## Science

Fast food restaurants keep food hot with infrared lamps. The heat is transferred to the food by _____. condensation conduction convection radiation I think it is radiation...?

55. ## Chem

how do you find the molarity of NaOH if 23.64ml of its solution is needed to neutralize .5632g of KHC8H4O4?

56. ## algebra 2

In a cooler there are 8 bottles of grape juice and 12 bottles of orange juice. There are also 6 blueberry yogurts and 9 strawberry yogurts. If you grab a bottle of juice and a yogurt without looking, what is the probability that you get a grape juice and a

57. ## physics

Consider two N-turn circular coils of radius R, each perpendicular to the axis of symmetry, with their centers located at z=±l/2 . There is a steady current I flowing in the same direction around each coil Assuming the N=100, I=2 Amperes, R=10 cm, l=2 cm

58. ## physics

A student, crazed by the first physics Midterm, uses a pushing force of 80 N angled at 70° to push a 5.0 kg book across the frictionless ceiling of his room. a. What is the block's acceleration? b. What is the force of the ceiling on the book?

59. ## Math

Find the magnitude of the resultant vector of two 5-pound forces that act on an object with an angle of 70° between them.

60. ## stastics

For each of the following confidence intervals, indicate how much of the distribution would be placed in the cutoff region for a two-tailed test from 80%, 85% and 99%

61. ## calculus

air is being pumped into a spherical balloon at a rate of 8 cm^3/min. Find the rate at which the radius of the balloon is increasing when the balloon's radius is 5 cm.

62. ## physics

A 570-turn solenoid is 19cm long. The current in it is 32A . A 2.0cm -long straight wire cuts through the center of the solenoid, along a diameter. This wire carries a 27A current downward (and is connected by other wires that don't concern us). What is

63. ## Finding the midpoint

Find the midpoint of the line segment joining the points P1 and P2 P1=(3,2) P2=(-5,7) The midpoint is=

64. ## Math help

Which of the following is an example of a dependent event? 1 flipping two coins 2 rolling a number cube and spinning a spinner 3 choosing two scoops of ice cream 4 choosing a cookie at random, eating it, and then choosing another at random

65. ## Physics

A long horizontal wire carries a current of 48A . A second wire, made of 2.6mm diameter copper wire and parallel to the first, is kept in suspension magnetically 15cm below(Figure 1) . Determine the magnitude of the current in the lower wire.

66. ## algebra.. HELP ME!!

Mai spends 7 3/4 hours in school each day. Her lunch period is 1/2 hour long, and she spends a total 7/10 hour switching rooms between classes. The rest of her day is spent in 6 classes that are all the same length. How long is each class?

1. The admission of Missouri as a slave state was controversial in the Senate because the Senate was pro-slavery. it would create sectionalism. **it would upset the balance. the Senate was anti-slavery. 2. The main topic of the Lincoln-Douglas debates was

68. ## World Geography

1.The physical feature of Western Europe where most major cities are found is called A. the plains. B. the glacier.

69. ## algebra 2

In a high school, 35% of the 3500 students participate in sports. The school board is proposing a participation fee to help with costs. To get student opinion, the school board randomly selects a committee of 6 students to join a discussion of the

70. ## Math

find the accumulated value of an investment of 20,000 for 3 years at an interest rate of 7%, if the money is a compounded semiannually; b. coumpounded quaterly; c. compounded monthly d. coumpounded continuously.

71. ## Soc. Studies

Which description best captures Abraham Lincoln's approach to slavery before he signed the Emancipation Proclamation? A.Lincoln was himself pro-slavery, but thought that states should have the right to choose whether or not slavery was legal. B.Lincoln was

72. ## mathematics

The perimeter of a square is 17.6cm.find the length of one side of the square

73. ## Science

When 2 resistors, R1 and R2 are connected in series across a 6V battery the potential difference across R1 is 4V. When R1 and R2 are connected in parallel to the same battery the current through R2 is 0.45 A. Find the values of R1 and R2. Thanks :)

74. ## physics

A 570-turn solenoid is 19cm long. The current in it is 32A . A 2.0cm -long straight wire cuts through the center of the solenoid, along a diameter. This wire carries a 27A current downward (and is connected by other wires that don't concern us). What is

75. ## science

10 students whose combined mass is 700 kg ride down 30 m in a elevator. How much thermal energy is produced in the elevator system by the loss in gravitational potential energy of the students

76. ## Calculus

Determine whether the planes are parallel or orthogonal. Equations given: 5x - 3y + z = 4 x + 4y + 7z = 1 How exactly do I solve this? It wasn't covered completely in class.

77. ## AP Chemistry

So I have the reaction 2HBr(g) H2(g)+Br2(g) I'm supposed to find the equilibrium constant, K, using free energy (G) values. The values in my textbook for G of H2 and Br2 were zero, and the value for HBr(g) was -53.5. So, to find delta G I did products -

78. ## Literature

"Slowly, silently, now the moon Walks the night in her silver shoon This way, and that, she peers, and sees Silver fruit upon silver trees; One by one the casements catch Her beams beneath the silvery thatch; Couched in his kennel, like a log, With paws of

79. ## Chemistry

a sample of helium gas has a volume of 1.25L at -125celcius and 50.0atm. the gas is compressed at 50.0 atm to volume of 325ml. what is the final temperature of the helium gas in Celcius

80. ## Accounting

The Divine Merchandising Corporation began March operations with merchandise inventory of 6 units, each of which cost \$27. During March, Divine Merchandising made the following purchases: (1) March 4, 12 units @ \$28 per unit, (2) March 15, 18 units @ \$30

81. ## Science

Two parents have three children. They have two girls and one boy. What is the probability that the next child will be a boy?

82. ## Algebra.... SOMEONE HELP ME!!!!

A rectangular room on a blueprint is 2 inches wide and 5 inches long. If the scale of the blueprint to the actual room is 1:72, what is the width of the room?

83. ## stat probability

A multiple choice quiz consists of 20 questions, each with 3 possible equally likely answers. If a student guesses at the answer to each question, then the mean number of correct answers selected by the student is?

84. ## haramaya/dinamics

the skier leaves 20degre surface at 10m/s a)determine the distance d to the point where he lands

85. ## Physics

Calculate the work required to be done to stop a car of 1500kg moving with a velocity of 60km/hr?

86. ## Physics

A long, narrow rectangular loop of wire is moving toward the bottom of the page with a speed of 0.021 m/s (see the drawing). The loop is leaving a region in which a 2.7 T magnetic field exists; the magnetic field outside this region is zero. During a time

87. ## Literature

"Slowly, silently, now the moon Walks the night in her silver shoon This way, and that, she peers, and sees Silver fruit upon silver trees; One by one the casements catch Her beams beneath the silvery thatch; Couched in his kennel, like a log, With paws of

88. ## English

An international agreement that aims to reduce carbon dioxide emissions and the presence of greenhouse gases. Countries that ratify the Kyoto Protocol are assigned maximum carbon emission levels and can participate in carbon credit trading. Emitting more

89. ## Physics gravity

A thin spherical shell has a radius of 2.4 m and a mass of 410 kg, and its center is located at the origin of a coordinate system. Another spherical shell with a radius of 1 m and mass 135 kg is inside the larger shell with its center at 0.6 m on the x

90. ## science

With the class watching from a safe (and dry!) distance below, suppose the student drops the balloon and the balloon hits the sidewalk with a force of 20 N. How much work was done on the sidewalk by the balloon?

91. ## algebra

Could you show me how to do these math systems and show your work so i understand how to do them. 1) 3x+2y+4z=19 2x-y+z=3 6x+7y-z=17 2) 5x+8y+6z=14 2x+5y+z=12 -3x+6y-12z=20 3) x^2+2xy-2y^2=-11 x^2+xy-2y^2=-9

92. ## Math

A rectangular parcel of land has an area of 2,000 ft2. A diagonal between opposite corners is measured to be 10 ft longer than one side of the parcel. What are the dimensions of the land, correct to the nearest foot?

93. ## Creative Writing

I know I asked this earlier, but right now I want to know if this is close enough to the original Alice in Wonderland to be a fractured fairytale (I've never seen Alice in Wonderland before and don't have enough time to watch it and write this before it's

94. ## chemistry

Which weak acid would be best to use when preparing a buffer solution with a pH of 8.50? 1) an acid with Ka=3.3x10^-9 2) an acid with Ka=5.0x10^-4 3) an acid with KA=6.3x10^-6 4) an acid with Ka=5.0x10^-7 5) an acid with Ka=4.0x10^-5 6) an acid with

95. ## Science

Air is a good conductor of heat. true false I think it is false...?

96. ## finance

Fashion Distributors Incorporated currently sells on terms of 2/10, net 30, with bad debt losses at 1% of gross sales. Of the 99% of the customers that pay, 50% take the discount and pay on Day l0; the remaining 50% pay on Day 30 (average collection period

97. ## Physics(Simple Harmonic motion and Elasticity)

A copper rod (length = 2.0 m, radius = 3.0 * 10^-3 m) hangs down from the ceiling. A 9.0-kg object is attached to the lower end of the rod. The rod acts as a “spring,” and the object oscillates vertically with a small amplitude. Ignoring the rod’s

98. ## Mathematics

Is this the correct answer to the following question? "A shake at the Shake Shack costs \$0.80. The bill for three burgers and a shake was \$4.40. How much is a burger?" \$4.40-\$0.80= \$3.60 \$3.60/3= \$1.20 My answer: \$1.20

99. ## Algebra 2

A teacher is choosing 4 students from a class of 30 to represent the class at a science fair. In how many ways can the teacher choose the students?

100. ## Chemistry

If you wanted to prepare 50.0 mL of hydrogen, collected over water at 25 C on a day when the barometric pressure was 730 torr, what mass of aluminum would you react with a hydrochloric acid? (Balance the equation first.)

101. ## Chemistry

What mass (g) of magnesium chloride (MgCl2) must react with sulfuric acid (H2SO4) to release 890.2 ml of Hydrogen chloride (HCl) gas at STP according to the following equation? Round to one decimal place. MgCl2 (s) + H2SO4 --> MgSO4 (aq) + 2 HCl

Suppose that each student in stat. has a 9% chance of missing class on any given day and that student attendance is independent. In a stat. class of 20 students, find the probability that: 1) no student is absent =15.16 2) one student is absent =30 3)

103. ## Mathematics

"Kim is 15. Kim's father is 39. In how many years will Kim's father be exactly twice as old as Kim will be?"

104. ## Science

A good refrigerant must have a low boiling point. true false I think it is true...?

105. ## physics

The mean diameters of X and Y, two planets in the same solar system, are 7.0 103 km and 1.4 104 km, respectively. The mass of X is 0.15 times the mass of Y. The value of g on Y is 8.6 m/s2. (a) What is the ratio of the mean density of X to that of Y (ρX /

106. ## physics

A truck of mass 8,000kg is traveling along a level road at an initial speed of 25m/s. The driver then shifts into neutral so that the truck is coasting, and the truck gradually slows to a final speed of 13m/s.

107. ## ABC

How many integers n satisfy the inequality 21≤n≤47?

108. ## Physics

A loop of wire has the shape shown in the drawing. The top part of the wire is bent into a semicircle of radius r = 0.12 m. The normal to the plane of the loop is parallel to a constant magnetic field ( = 0°) of magnitude 0.85 T. What is the change ÄÖ

109. ## science

1. _____ is the process by which food is broken down so that nutrients can be used by the body. (1 point) Absorption Digestion Elimination Ingestion 2. What type of digestion takes place in the mouth? (1 point) chemical mechanical chemical and mechanical

110. ## engineering

Mary Williams needs to change a Fahrenheit temperature to Celsius. Use the Fahrenheit temperature of 80 degrees to test your solution.

111. ## Chemistry

What volume of hydrogen, measured at 25 C and 1.00 atm can be produced by dissolving 5.0 g of magnesium in hydrochloric acid? (Write and balance the equation for the reaction first.)

112. ## Mathematics

"Kim is 15. Kim's father is 39. In how many years will Kim's father be exactly twice as old as Kim will be?"

if P(A)=.60, P(A/B)=.50, AND P(B)= .40, answer the following. 1) events A and B are independent =FALSE true or false or cannot determine 2) events A and B are disjoint =TRUE true or false or cannot determine 3) find P(A and B) =??????

114. ## Physics

In 1996, NASA performed an experiment called the Tethered Satellite experiment. In this experiment a 2.20 104-m length of wire was let out by the space shuttle Atlantis to generate a motional emf. The shuttle had an orbital speed of 7.50 103 m/s, and the

115. ## civi edu.

define constitution and explain federal constitution,unitary constitution,confederal constitution

116. ## physics

Suppose the Sun is 1.52669 × 108 km from Earth. The speed of light is 2.99792 × 108 m/s. How long does it take for its light to reach us? Answer in units of min

117. ## Masemola high school

Two institution or organisations that are involved in supporting or giving redress to these disasters. Teenage pregnancy, lack of infrastructure and genetically modified foods.

A computer with software costs \$2,987, and Docie Johnson has agreed to pay 19% per year finance charge on the cash price. If she contracts to pay the loan in 18 months, how much will she pay each month?

119. ## English

How might an instruction manual designed for troubleshooting differ from an instruction booklet designed for improving performance in a skill?

120. ## HELP!! Chemistry

Draw a Lewis structure for SO(subscript 2) in which all atoms obey the octet rule. Show formal charges. Draw a Lewis structure for SO(subscript 2) in which all the atoms have a formal charge of zero. Explicitly showing zero charges is optional.

121. ## Science

Most organisms reproduce: A. Sexual B. asexual C. By meiosis Is it b not sure between b and a

122. ## English

1. This is the boy whom Mary likes. 2. This is the boy who Mary likes. 3. This is the boy Mary likes. (Are they all grammatical? When do we use Sentence 2?)

123. ## Creative writing

I have to write a fractured fairy tale, and I have 2 questions. 1) is Alice in Wonderland a fairy tale? And 2) If I wrote something about Alice who falls asleep in wonderland and is killed and forced to be there forever, does that count as a fractured

124. ## stat probability

Find the mean of the distribution shown. x 2 5 7 P(x) 0.28 0.42 0.30 What is the mean and the standard deviation of this distribution?

125. ## math

the length of a rectangle hallway is 3 times its breadth if the perimeter of the hallway is 48 m find its length and breadth

126. ## Geometry

Convex quadrilateral ABCD has sides AB=BC=21, CD=15 and AD=9. Given additionally that ∠ABC=60∘, what is the length of BD?

127. ## stat probability

At a certain college, there were 780 science majors, 320 engineering majors, and 390 business majors. If one student was selected at random, the probability that they are a business major is?

128. ## Probability

In a cookie jar, there are 6 choco chip cookies and 8 oatmeal cookies. Kim takes out the cookies one at a time and proceeds to eat them. The probability that the 7th cookie that Kim eats is a choco chip cookie is a/b, where a and b are positive coprime

129. ## Science

A device that can be used both for cooling and heating is a _____. heat engine compressor heat pump vaporizer I think it is Heat pump..?

130. ## Algebra

the angle of elevation from bottom to the top of the mountain has a measure of 60 degrees. suppose a ski lift to the top is 2000 feet long. how high is the mountain to the nearest feet? Am I suppose to find the sine of 60?

131. ## geometry

There is a square with a star inside. The square has 25cm to show the length of one side. On the right, outside the square, it says 125cm squared, with a line pointing the center of the star in the square. The question is; The target of a shooting game

132. ## Math Help

Suppose that each student in stat. has a 9% chance of missing class on any given day and that student attendance is independent. In a stat. class of 20 students, find the probability that: 1) no student is absent 2) one student is absent 3) three student

133. ## trig

I am trying to get wxMaxima to give me arcsin(4/5), either in radians or degrees. I am using a: 4/5\$ b:asin(a)\$ print("the angle is ", b)\$ But it returns the angle is asin(4/5) How do I get wxMaxima to give me the angle? I want .927 radians or 53.1

134. ## Mathematics

Is this the correct answer to the following question? "You can ride a bicycle 15 mph. Your sister rides 12 mph. You give her a one hour head start. In how many hours will you catch up if neither of you stops?" 15-12= 3 12/3= 4 My answer: 4 hours.

135. ## life orientation

three ways in which enviromental health hazard can contribute to ones ill health

136. ## Physics

You wish to swim across a small river to your friend on the other side. The river is 30 m wide and you begin to swim straight across it at a speed of 1 m/s. The current in the river is 0.5 m/s and so the river carries you downriver as you swim. How far

A horse and a donkey can mate with each other. Their offspring,called a mule, is not fertile. Do horses and donkeys belong to the same species? Explain your answer. A scientist collects wild rabbits that live at sea level and moves them to the mountains.

solve for the value of x: 6log (x^2+1)-x=0. please help me because I do not have any idea in this topic.

139. ## Chemistry

What mass (g) of water is produced by the combustion of 48.8 g of propane according to the following reaction? Round your answer to one decimal place. C3H8(g) + 5 O2(g) --> 3 CO2(g) + 4 H2O (l)

140. ## Chemistry

What is the mass (g) of nickel(II) nitrate (182.71 g/mol) dissolved in 160.4 mL of 0.100 M Ni(NO3)2 solution?

141. ## Probability

A school is running a raffle for two prizes. 59 tickets were sold for the raffle, numbered 1,…,59. All the tickets are put into a hat and a teacher picks out two tickets which have numbers i and j from the hat. What is the expected value of |i−j|?

Is Scanner Accuracy the Same for Specials? In a study of store checkout scanning systems, samples of purchases were used to compare the scanned prices to the posted prices. The accompanying table summarizes results for a sample of 819 items. When stores

143. ## Science

What is the mass of LiF in 100.0mL of 0.10M solution?

144. ## Math

Bought 3 shirts & 2 pair pants for \$85 and my friend bought 2 shirts & 5 pants for \$130, and the shirts are the same price, what is the price of each shirt?

145. ## Algebra

I need some help with algebra as I'm confused as to how to solve them. Find the common difference d and the value of a1 using the information given. 1. a6= 5/4, a8= 9/4 Evaluate each sum. 2. E like symbol that has a 29 on the top. On the bottom n=1 and to

146. ## life orientation

one environmental or human factor that causes ill health,accidents,crises and disasters within south africa

147. ## Trig

Solve the equation on 0° ≤ θ < 360° and express in degrees to two decimal places. sin(2θ) = -0.7843 I've gotten 308.345° (QIV) and 231.655° (QIII). I'm unsure how to get the answer though? The final answer is: 115.83°, 295.83°, 154.17°,

148. ## Newton's Laws

1. An 1760 kg car is moving to the right at a constant velocity of 2.94 m/s. (a) What is the net force on the car? (b) What would be the net force on the car if it were moving to the left? 2.A freight train has a mass of 6 107 kg. If the locomotive can

149. ## FRM 121 Fashion History II

Describe the stages in the Victorian and Bustle Era acquisition of adult clothing by male and female children in the late 19th century?

150. ## Newton's Laws

1. An 1760 kg car is moving to the right at a constant velocity of 2.94 m/s. (a) What is the net force on the car? (b) What would be the net force on the car if it were moving to the left? 2.A freight train has a mass of 6 107 kg. If the locomotive can

151. ## Science

Most microrganisms reproduce: A. Sexually B. asexually C. By meiosis A or B not sure

152. ## algebra 2

Students at a high school all took the same English test. The scores are approximately normally distributed with a mean of 77 and a standard deviation of 9. If 2500 students took the test, approximately how many scored above 86 or below 68%?

153. ## Help! Algebra

Find the common ratio r and the value of A1 with the information given. 1. A3=324 A7=64 2. A4=32/3 A8=54

154. ## English

What is the most important reason to consider typography when creating a procedural text?

155. ## Physics

two blocks are connected by a light rope over a pulley fixed at the edge of a table such that bloc A, 16kg is a the table top and block B, 8kg is hanging by the edge. block A is acted upon by a mass of 200N acting towards the center of table surface. the

156. ## aig math(Ms.Sue)

Your school librarian has asked your class for some help on the purchase of some new bookcases with 2 shelves each. She has 300 new books she needs to shelve. 1/2 of the books are half an inch thick. 1/3 of them are 1/4 of an inch thick, and the rest are

157. ## hist

Can free labor compete with slave labor?

158. ## Science

All objects emit _____ radiation. A.electromagnetic B.kinetic C.thermal D.solar I think it is A...?

159. ## fractions

how can you tell that a fraction is a unit fraction?

160. ## life orientation

Critically discuss ten ways in which the environmental health hazards can impact on one's health

161. ## chem

If a buffer solution is 0.170 M in a weak acid (Ka = 7.8 × 10-5) and 0.500 M in its conjugate base, what is the pH?

162. ## Chemistry

A hospital glucose solution is analyzed to verify its concentration. A 10.0 mL sample with a mass of 10.886 is evaporated to dryness. If the solid glucose residue has a mass of 0.648, what is the m/m% concentration?

163. ## Chemistry

What is the molarity of a saline solution that contains 3.6 g NaCl (58.44 g/mol) dissolved in 100.0 mL of solution?

164. ## Chemistry

You have a stock solution of 5.0 M H2SO4. How many mL of stock solution are required to make 136 mL of 1.6 M H2SO4 solution

165. ## Analytic Geometry/Calculus

We didn't go over the perpendicular form in class, only the parallel. Find the general form of the equation of the plane passing through the point and perpendicular to the specified vector or line.

166. ## Three Dimensions/Calculus

Find the general form of the equation of the plane passing through the point and perpendicular to the specified vector or line. P= (2,1,2) which is perpendicular to n=i

167. ## Mathematics

Is this the correct answer to the following question? "You can ride a bicycle 15 mph. Your sister rides 12 mph. You give her a one hour head start. In how many hours will you catch up if neither of you stops?" 15-12= 3 12/3= 4 My answer: 4 hours.

168. ## math

Say the price of a gallon of milk was raised from \$3.00 to \$3.50. What was the percent increase? Round to the nearest whole percent.

169. ## Math

A farmer is planting squash plants that need 2 3/8 feet to spread out. He has an area along a fence that is 20 feet long. Round the amount of space the squash plants need to the nearest 1/2 foot. How many squash plants can the farmer grow along the fence?

170. ## Math

You earned a \$25 gift card by working in Apangea and have purchased four items. Please list these items in the table below along with their cost. Then calculate the cost of each item as a fraction a decimal and as a percentage. 1.Pack of pencils Amount

171. ## physics

five joules of work are needed to shift .5 C of charge from one place to another. the potential differences between the places is

Put brackets [ ] around the adverb in each of the following sentences. Write how if the adverbs tell how, when if the adverbs tells when, or where if the adverb tell where the action takes place. 1. Tameesha thought her prom gown draped beautifully. 2. She

173. ## Algebra

The value in dollars, V, of a certain stock can be modeled by the equation V=-16+88t+101, where t represents the time in months.When did the stock become worthless?

174. ## LA

What do you learn from the dialogue between Mr. Frank and Miep at the beginning of Scene 1? A;Miep wants to show Mr. Frank something in the building. B;Mr. Frank wants to live in this building to hold on to his memories. C;The war has ended, but Mr. Frank

175. ## math

Ok.. "The strongest recorded earthquake in the world took place in Child on May 22, 1960. It had a magnitude of 9.5 on the Richter scale. The strongest quake actually recorded in Canada was magnitude 8.1 on August 22, 1949 and occurred off the Queen

176. ## math

Selma went to the mall and spent 1/3 of her money. She then lost 1/2 of what she had left. She then had \$5. How much money did Selma originally have? I know the answer is 30 but how do I explain others how to figure it out easily?

177. ## achem

1L of a .2M solution of butanoic acid is altered by adding 5.00g of sodium butanoate. what is the pH of the new solution?

178. ## Mathematics

System 5x+8y+6z=14 2x+5y+z=12 -3x+6y-12z=20

179. ## algebra2

What are the mean, variance and standard deviation of these values? 62,41,54,60,49,58.

180. ## life orientation

Critically discuss 6 ways in which the environment health hazard can impact negativly on ones health

181. ## math beyond this

Is there a way to make this look nicer? x^2+4x (208/x^2)

182. ## chemistry

how do i predict a conjugate a base? Ex: HBr. The conjugate base is Br- a. NH4+ b. H2O c. H2PO4

183. ## Physics, diffraction

1. Yellow light of wavelength 580 nm shines on a diffraction grating with 4000 lines/cm. A.At what angles do the first-order and second-order maxima occur?

184. ## art history

According to the lesson, most African art was created for all of these purposes EXCEPT:

185. ## math

the world record for the men's long jump is 29 3/8 feet. the women's record for the same event is 24 88/48 feet. How many feet longer is the men's record?

All of the following are goals of study reading EXCEPT: A. greater speed. B. retain information in your long-term memory. C. be an active reader. D. active reading

187. ## Statistics

A study of two groups of children since early childhood: One group of 62 attended preschool. A control group of 61 children from the same area and similar backgrounds did not attend preschool. Over 10 year period as adults, 38 of the preschool sample and

Most organisms reproduce: Sexually Asexually By meiosis Is it asexually or sexually not sure I think it is asexually though

189. ## Physics

A series RCL circuit has a resonant frequency of 1470 Hz. When operating at a frequency other than 1470 Hz, the circuit has a capacitive reactance of 5.0 Ù and an inductive reactance of 29.0 Ù. (a) What is the value of L? 1 H (b) What is the value of C?

190. ## Chemistry

titration of a 50.00mL of KOH required 175.00mL of 0.0150M acetic acid, what is the Molarity of KOH solution

192. ## Chemistry

If a buffer solution is 0.160 M in a weak base (Kb = 2.3 × 10-5) and 0.550 M in its conjugate acid, what is the pH?

193. ## chemisty

what volume will be occupied by 3.25mol of oxygen gas at 735mmhg and 25celcius?

194. ## Chemistry

What volume(ml) of 8.0 M solution is required to make 134.3 ml of 1.2 M solution

195. ## 7th grade math/ geometry

how to name an angle in four ways?

196. ## Physics

The world record for revolutions per minute for an ice skater is 308 RPM, held by Natalia Kanounnikova. You can see a video of the spin here. When she starts the spin and her leg is extended, she's going somewhere between 1-2 revolutions per second. Let's

197. ## physical science chemistry

calculate the mass of sodium nitrate needed to make 550 ml of solution of concentration 0;2 mol.dmc to the power of minus 3

198. ## Precalculus Test

I have a precalculus test coming up and I'm not really understanding how to do everything. Please help. 1. Find the angle betweem 0 and 2pi which is coterminal to the angle -(7pi)/5. Now convert the angle you just found to degrees.

199. ## life orientation

describe the negative impact of HIV on a person well being and society in general

200. ## Algebra

Two questions I need help with. Find the indicated partial sum using the information given. 1. a3=4/9, a7=9/64, S6 Determine wheater the infinite geometric series has a finite sum 2. 6+ 3+ 3/2 + 3/4 +.... 3. -49 + (-7) + (- 1/7) +...

201. ## physics

Three charges are at the corners of a rectangle with side L1 = 0.04 m and L2 = 0.015 m as shown. If q1 = 1.3 microCoulombs, q2 = 2.8 microCoulombs, and q3 = 3.3 microCoulombs, what is the magnitude of the force on q2

202. ## physics

a motor cycle wheel has a diameter of 75cm.During a contest journey,the wheel makes 3000 complete revolutions.how many metres does d motorcycle travel.

203. ## Chemistry

What is the molarity of a sucrose solution that contains 76.7 g of C12H22O11 (342.34 g/mol) dissolved in 138.2 mL of solution

204. ## math

how to find volume of a triangle

205. ## English

1. He wants to eat some delicious foods. 2. He wants to eat some delicious food. (Which one is correct? are both OK?) 3. He speaks a little English. 4. He speaks English a little. (Are both grammatical?)

50 ml of a .1103M solution of formic acid is titrated with a .2511M NaOH. a) What is the pH before and NaOH is added? b) How many mL of NaOH solution must be added to reach the equivalence pt? c) what is the pH at the equivalence pt of the titration? d) If

207. ## Science

When you hold a ball above the ground it has kinetic energy. true false I think it is False - that is potential energy..right?

208. ## HISTORY

how did the US support Diem's regime between 1954-1964?

209. ## Precalculus

Jessica deposited \$785 into an account that pays 6.2% interest compounded continuously. How long will it take until Jessica has \$1000?

210. ## jardan high. general science

water,anchorge,photosynthesis,mineral,food,support. The main functions of roots are { } and taking in { } and { }. The stems { } the other parts of the plant and transport { },{ } and around the plant.the leaves are the main part making { } by { }.

211. ## math

I need an expression written for the following logs using "sum, difference, or multiple of logarithms." a) log[base(2)] ((x^2) - 9)/(x^3))^3 b) log[base(a)]5a^4 Hopefully they are clearly written. thanks. -roberto

212. ## mathematics

Need help with these: Write the expression as a logarithm of a single quality. a) 3log[base5](a) + 4log[base5](b) - 2log[base5](c) b) 3log(2)-(1/3)log((x)^(2) - 1) I appreciate help.

: Is Scanner Accuracy the Same for Specials? 176 miles on Wednesdays, 181 miles on Thursdays, and 108 miles on Fridays. He wonders if this evidence contradicts his belief in a uniform distribution of miles across the days of the week. Explain why it is not

214. ## Chemistry

What mass(g) of hydrogen gas is produced by decomposing 179.1 g of water. Round your answer to one decimal place. 2 H2O(s) --> 2 H2(g) + O2 (g)

215. ## Chemistry

A 2.5% KCl solution is prepared by dissolving enough of the salt to give 181.4 g of solution. What mass (g) of water is required?

Find the number of terms in each sequence. 1. 2,-6, 18,-54,,,,,-4374 Find the common ratio r and the value of a1 using the information given. (assume r >0) 2.a3=324, a7=64 Find the indicated sum. 3. a1=2, r=-3; find s8 4. E like symbol with a 10 on top. On

217. ## Chemistry

Calculate the pH of a mixture containing 50.0 mL (0.50M) H2SO4 and 50.0 ml (0.50M) NaOH. I have no idea where to start!I need a walk through if possible! I've tried everything and I get the wrong answer every time!

218. ## math

many of the health fads were actually healthful. what does the word ''healthful'' mean? a- not healthy b- full of health c- cause to be healthy d- a state of health

219. ## science P2

calc the volume of solution that contains 5,3 g of sodium carbonate if the solution has a concentration of 0,4 mol-dm (to the power of minus 3)

220. ## Venn Diagram Help Please

If P(A)=.60, P(A/B)=.50, AND P(B)= .40, answer the following. draw a venn diagram for the probabilities of A and B.

221. ## physical science

The orbital velocity of an earth satellite in an orbit 400 mi above the earth?

222. ## science

A biochemist used 10.000 grams of P-32 in a test on plant growth but forgot to record the date of his experiment. When he measured the amount of phosphorus-32 on another day, he found only 1.250 grams of the isotope remaining. If the half-life of P-32 is

223. ## algebra

Find the number of terms in each sequence. 1. 2,-6, 18,-54,,,,,-4374 Find the common ratio r and the value of a1 using the information given. (assume r >0) 2.a3=324, a7=64 Find the indicated sum. 3. a1=2, r=-3; find s8 4. E like symbol with a 10 on top. On

224. ## math

an oak tree grows 500 meters north of the bottom of a rectangular park. The oak tree takes up a space of a circular area with a radius of 2.5 meters .The center of the tree is 24 meters from the left side of the park .The park is 200 meters wide and has a

225. ## Calculus

1. In a certain country, the percentage of the population relocating to a new town is given by the following function: p(t) = 20.6e^-0,009t,where 0 _< t _< 52. Time is zero (t = 0) corresponds to the year 1960. 1. Find the rate at which people relocated

226. ## algebra

soybean meal is 14% protein; cornmeal is 7% protein. How many pounds of each should be mixed together in order to get 280-lb mixture that is 125 protein?

227. ## Applied calculas

3. a) Write out the limit definition for the derivative of y = xx. Attempt to solve it. b) Write out the limit definition for the derivative of the inverse trig function from question 2. Attempt to solve it. c) Discuss the value of implicit

which part of a neuron in the cerebellum of the brain is the most extensive in terms of anatomical developement? a-hillock region b-cell body c-dendrites d-nucleus e-axon -my answer is axon

229. ## math

I am a decimal number and when you multiply me by the number that is 10 times greater than me you get the answer 291.6

230. ## Geometry

ABC is a triangle with circumcenter O , obtuse angle BAC and AB

231. ## Life orientation

I need help on this question?to discuss 5 ways in which the human or envinmental problem impacts on the community that causes ill health

232. ## physics

An object is placed (a)6cm (b)20 from a thin convex lens of focal length 10cm.determine the nature,position and magnification of the image in each case.

233. ## PHILOSOPHY

Who claimed that our subjection to pain and pleasure should be the foundation for our lives?

234. ## Algebra

The value, V< of Juan's investment portfolio can be modeled by the equation V=16t^2-256t+16,000. When will Juan's investment portfolio be worth \$16.576.00?

235. ## college Mathematics

Can someone please help me with this I am not getting the same answers as the examples in the book. U={1,2,3,4,5,6,7,8} A={1,2,3,4,7,8} B={1,2,4,5} Determine (A'UB')n(AUB)'

236. ## Trig

Find the exact values of sin 2 theta, cos 2 theta and tan 2thea using the double angle formula sin theta = 3/4 , pi/2 < theta < pi

237. ## geometry

On my last question, just posted, I asked what percent of the area of the target was shaded. The answer options were 5%, 10%, 20% or 80%?

238. ## chemistry

1L of a .2M solution of Ethanoic acid is altered by adding 5.00g of sodium butanoate. what is the pH of the new solution

239. ## life orientation

what are 10 ways in which environmental health hazards impact negatively in one's life

240. ## L.O

In 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts on the community of homelessness

241. ## stat probability

The number of movies shown in different theatres on Saturday morning in a small city is given in the following. x P(x) 1 0.15 2 0.20 3 0.30 4 0.10 What is the mean distribution (or expectation) of the data given above?

242. ## stat probability

According to an Internet posting, 65% of adults enjoy drinking soda. Choose a group of 12 adults at random. The probability that none of them enjoy drinking soda is?

243. ## PHI103

If I move to Texas, I will need air conditioning. I don't need air conditioning. So I didn't move to Texas" is an argument form known as

244. ## Physics

Recently there has been technological advances that allow for 3-D imaging up to kilometers away from an object. This can be done by using laser light that bounces off an object. By measuring the time it takes the laser light to get to the object and back,

245. ## math

ted has 8 autographed baseballs. all together the baseballs are worth \$200.00 explain why you do not have enough information to make a bar diagram to find the value of each baseball.

246. ## math

what number is greater than 55 but less than 60, is not an odd number, and when you add up the 2 digits, it equals 7?

247. ## chemistry

comment that enthalpy of nutralization is merely the heat of formation one-one mole of liquid water

248. ## life orientation

identify and state the human and environmental factors causing HIV the under discussion

249. ## Math

Billy has a board that's six and 2/3 feet long. He cuts it into 12 equal pieces. How long is each piece?

250. ## math

Considera compoound experment in which a nickel is flipped and then a quarter is flipped, need to know all the possible outcomes I came up with 4. correct? also need to know the probability of each possible outcome

251. ## physics

Longitudinal waves in a spring have a wavelength of 50mm.The vibrator making them is vibrating at 5 oscillations per second. Calculate the speed of the waves.

252. ## math

solve each system of equations by graphing y=-1/2x+5 y=3x-2

253. ## Algebra

I need some help with algebra I'm not sure how to get to the answer. Find the number of terms in each sequence. 1. a1=4 an=42 d=2 2. a1--0.3 an=-36 d=2.1 3. 1/12, 1/8, 1/6, 5/24, 1/4,......9/8 Evaluate each sum. 1. There is an e like symbol that has a 15

254. ## Math

I think this is geometry: There is a small box with a black frame around it. Inside the box, at the bottom, is an 8. Inside the box, to the right, is a 2. It looks like they are showing Length & Height. On the outside of the box, under the 8, there is a

255. ## Physics, diffraction, interference, help!

3.Blue light (λ = 450 nm) shines on a diffraction grating that has 4000 lines/inch. A.Calculate the angle of the fourth-order image

256. ## Physics

Mandy picks up a 25 N book from the floor to a height of 0.50m. How much work does Mandy do? (Hint use w=mg to find the force necessary to move the book)

257. ## Math

Please explain how to solve this problem. 7x-6/3 + 4(8+2x)

258. ## physics

how much energy is stored in a 9 volt battery rated at 10 a hour

65 chemical engineering students are from urban/suburban backgrounds. (Success is defined as a C or better in the course.) 52 of the 65 students succeeded. Another 55 students were from rural backgrounds; 30 of these students succeeded. A Is there good

260. ## maths-

Given: B={1},find no. of elements of P[P{P(B)}].

261. ## Science --

If you mixed 25.00g of salt in 100.00mL of water and it all dissolved, what would the concentration be in g/mL?

262. ## math

Math systems 3x-2y-z=-20 x-y=10

263. ## Calculus

1. In a certain country, the percentage of the population relocating to a new town is given by the following function: p(t) = 20.6e^-0,009t,where 0 _< t _< 52. Time is zero (t = 0) corresponds to the year 1960. 1. Find the rate at which people relocated

264. ## English

While you're working in a sales office, the office manager says that the sales staff should try to use an empathetic tone when speaking with customers. In the word empathetic, the root means a.to give. b.to feel. c. to come d.to force.

265. ## Life orientation

Identify and describe 3 enviromnmental health hazards that cause ill health, accidents, crisis, and disasters

which part of a neuron in the cerebellum of the brain is the most extensive in terms of anatomical developement? a-hillock region b-cell body c-dendrites d-nucleus e-axon -my answer is axon

267. ## Math

The tempreture was negative two degrees Celsius before it dropped 10 degrees. What was the tempreture after the drop?

268. ## french

quelle heure est il?what is the time? 6:35,12:15,22:50,16:30,23:55 PLS HEEEEEEEEEEEEEEEEEELP

269. ## Economics

Use the concepts of marginal cost and marginal revenue to derive an optimal capital budget for Company X, which has identified 7 possible investment projects and determined its cost of capital as shown below. Table A: Alternative Projects, Required

270. ## life orientation

name two institution organization that are invoved in supporting redress to these disasder in xenophobia

Find the number of terms in each sequence. 1. 2,-6, 18,-54,,,,,-4374 Find the common ratio r and the value of a1 using the information given. (assume r >0) 2.a3=324, a7=64 Find the indicated sum. 3. a1=2, r=-3; find s8 4. E like symbol with a 10 on top. On

3m + 8 = m

273. ## maths

Given the identity x^4-2x^3+ax^2-2=x(x-1)(x+1)Q(x)+4x^2+bx+c , where Q(x)is a polynomial, (i)state the degree of Q(x) (ii)find the values of a,b and c ,and hence state the remainder when x^4-2x^3+ax^2-2 is divided by x^3-x .

274. ## math

If 4x^3-6x^2+1=(x-2)Q(x)+ax-3 for all values of x ,where Q(x) is a polynomial in x ,find (i)the value of constant a (ii)Q(x)

275. ## math

Maribel's city imposes a tax that is 40% of the state tax she pays. Her taxable income is \$198.50 per week. Her state imposes tax at a rate of 5%. How much state and local tax is withheld from her weekly pay?

276. ## electrochem

Between Mg and Zn which one is the anode and which one is the cathode? And between Mg and Fe which one is the anode and which one is the cathode? Please and thank you. im so stuck. :/

What I the before-tax cost of 8.4% and the firm uses 35% what is QM's weighed average cost of capital.

278. ## Years ?

"In the early 1930s" what years are those like 1900-1930 right?

279. ## Algebra

I just cannot seem to get these two problems. Any help is greatly appreciated. Use the method of substitution to solve the system. xy= 4 5x − y + 19= 0 and y^2 − 4x^2 = 7 9y^2 + 16x^2 = 323

280. ## Albebra 2

A school wants to determine the average time it takes students to get to school. Every student coming off the bus is surveyed. What is the sampling method used? Does the sample have a bias?

281. ## hastings

In a heating curve, when is the temperature constant?

282. ## Science

Describe what happens to body systems over time from infancy to adulthood to older adulthood. In your own words please. thank you guys ;)

283. ## physics

Longitudinal waves in a spring have a wavelength of 50mm.The vibrator making them is vibrating at 5 oscillations per second. Calculate the speed of the waves.

284. ## Applied calculas

1. Consider the function y = xx (for x > 0). a) Why does the derivative rule for xn not apply? b) Why does the derivative rule for ax not apply? c) What are the four magic properties of logarithms? d) Take the ln of both sides. Use the properties of

285. ## Physics

A current I=2 Amperes flows in a circular single loop coil of radius R=10 cm. (a) Evaluate the magnitude of the magnetic field (in Tesla) at a point P on the axis of the coil, and a distance z=5 cm away from the plane of the coil itself

286. ## Chemistry

Which is the more concentrated solution: a solution made with .70 moles of NaCl in a .35L water or a 35g of NaCl in .75L?

287. ## math HELP

A barrel contains 15 liters of water. After a boulder is dropped into the water, the reading on the barrel is 22 liters. What is the volume of the boulder?

288. ## Math probability

Assume that 60% of community college students are female. 1) if we pick 100 students at random justify why we can or cannot model this using a normal model. 2) find the probability that between 50 and 70 of the 100 students selected are female. 3) fidn Q1

289. ## life orientation

Ways in which humans or environmental problems impacts on the community

290. ## Health

In 10-15 line critically discuss 5 ways in which the human or environmental factor problem impacts on the community. Provide relevant source to support your claims.

291. ## Chemistry

First, the question I'm given is: What is the pH of a 1.0 L solution containing 0.25M acetic acid and 0.75M sodium acetate ( Ka for acetic acid= 1.8x 10-5) So I took the -log(1.8x10-5)= 4.74+log(.75/.25)= 5.22 pH But then I'm asked if .050 mol NaOH is

292. ## life orientation

in 10-15 lines critically discuss 5 ways in which the human or environmental problem impacts of pollution on the community

293. ## Life orientantion

Describe 5 factors of Hiv

Find the number of terms in each sequence. 1. 2,-6, 18,-54,,,,,-4374 Find the common ratio r and the value of a1 using the information given. (assume r >0) 2.a3=324, a7=64 Find the indicated sum. 3. a1=2, r=-3; find s8 4. E like symbol with a 10 on top. On

295. ## stat probability

An apartment building has the following apartments: 2 bdrm 3 bdrm 4 bdrm 1st floor 7 3 4 2nd floor 9 0 11 3rd floor 8 4 7 If an apartment is selected at random, what is the probability that it is a 2 bedroom apartment on the 3rd floor?

296. ## Calculus

Implicit Differentiation. (x-3)^2+(y+2)^2=25

297. ## math

You are developing a data base for Army tracked combat vehicles and you are normalizing the data base to base year 2006 dollars. What number would you enter into the data base for a vehicle budgeted at \$1,725,000 in the FY08 appropriation? \$1,604,505

298. ## Physical science

According to the law of the conservatives of mass, if the products o a reaction have a mass of 64.0 g, then the total mass of the reactants:

299. ## math

computer can do 1000 operations in 4.25 X 10 to the 6th power, how many operations can this computer do in an hour?

300. ## FRENCHHHH

conjugue les verbes a limparfait ou au passé compose guillame,quatorze ans,se rapelle son long sejour a l'hopital, quand il receivait la visite des animatuers de docteur clown,La premiere fois, j'ai cru(croire) qu'ils ______ (venir) d'une autre planete!

301. ## Applied calculas

Let y=〖tan〗^(-1) x Rewrite it as an equation involving a trig function. Use implicit differentiation to determine an expression for y.

302. ## math

A barrel contains 15 liters of water. After a boulder is dropped into the water, the reading on the barrel is 22 liters. What is the volume of the boulder?

303. ## social studies

what wiped out most of the indigenous population of australia

304. ## science/math

A barrel contains 15 liters of water. After a boulder is dropped into the water, the reading on the barrel is 22 liters. What is the volume of the boulder?

305. ## chemistry

200g of HOCl is placed inside a 3L container and allowed to reach equilibrium. Find the equilibrium concentrations for all species. Given: 2HOCL (g) H20 (g) + Cl20 (g) when Delta H = +56 kJ and Keq = 11.11 at 25 C

306. ## Math

Cheryl counted all of her quarters and announced to her family that she had 32/4 dollars. How many dollars were her quarters really worth? A.32 dollars B.1 dollar 70 cents C.8 dollars D.128 dollars C

307. ## accounting 205

compute the following items for lone pine company for 20x2, rounding all calculations to two decimal places when necessary

308. ## Mathematics

6x + 7 = 55 x = 8 Is this the correct answer to the following question? "I'm thinking of a number. If you multiply it by 6 and then add 7, you will get 55. What is my number?"

309. ## Math

I got an answer by trial and error but need to know how to set the problem up. Bob bought 10 movies for \$153. The DVDs were \$12 and the BluRays were \$23. How many of each did Bob buy? 7 DVDs and 12 BluRays. Thank you for help.

310. ## Math-Statistics

Assume that 60% of community college students are female. 1) If we pick 10 students at random justify why we can or cannot model this using a normal model. 2) Find the probability that 8 of the 10 students selected are female. 3) Find the probability that

311. ## mathematics

Given: B={1},find no. of elements of P[P{P(B)}].

312. ## Big MATH Help needed

An object at rest begins moving horizontally on the x-axis, starting at position x(t) = 0 feet at time t = 0 seconds.Suppose, after exactly 2 seconds we measure the position of the object to be 3 feet to the right of the origin AND measure the object to be

313. ## Chemistry

How many grams of Na2CO3 can be found in a 273 mL sample of 0.5 M solution

314. ## Life orientation

Identify 3 environmental health hazards that cause ill health,accidents,crises, and disasters within the south african community and globally

315. ## stat probability

A coin is tossed 4 times. Find the probability that the 4th toss is a tail, given that the first 3 tosses were all heads.

316. ## Algebra 1

y=3x+11 2x+y=1 method: __________ x= ____________ y= _____________

317. ## math 118

On a math test a student where the mean is 50 and the standard deviation is 12, a student has a z-score of 0.83. What did the student score on the test?

318. ## math

(8x^4 + 4x^2 + x) - (x + 10)(2ax^2 + 1) The expression is simplified to 8x^4 - 6x^3 - 56x^2 - 10. What is the value of "a" ?

319. ## M.H.S

Marry claims that she can shoot a stone 50m vertically high using slingshot .what is the relationship of the height reached by the stone and initial velocity of it?

320. ## algebra

solve for x: x-18 =64

321. ## math

Which one is need to happen in order for a shadow to occur?

322. ## chemisty

Calculate the volume of 4.0ml of nitogen gas at 754mmhg and 25 degrees celcius

323. ## abc

How many elements are in the set {10,12,14,…,48,50}?

325. ## physics

sound can not travel through

326. ## Calculus

what is the second derivative of (x^3-6x)^11 that is fully simplex

327. ## math

What is 88% of \$33?

what does the quote help us understand, or explain "reading furnishes the mind only materials of knowledge it is thinking that makes what we read"

329. ## math

a banquet hall area is in d shape of a rectangle 30m by 20m.part of d area is a concrete square 15m by 15m,the rest is covered with carpet.calculate the area of the carpet.

The table below reports birth weight and whether the mother smoked for 189 pregnancies. If Smoking and Birthweight were independent, then we would expect the number of low birth weight babies born to smoking mothers to be: (???/???) * ??? = 23.1 The

331. ## math

How do you write out 121.2 million

332. ## Life Orientation

3 environmental health that cause ill health

333. ## math

Manny is painting 5 cubes that are each 2 inches long. He needs to paint each cube twice. How much surface area total will he paint?

334. ## math

if less than half of the garden is planted with corn, then is it reasonable to estimate that 5/6 of the garden is planted with corn?

335. ## to ms sue

do you how to do probality? if so can you look at my question

336. ## L0

5 factors that contribute to hiv

337. ## math

can u help me with my algebra

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