# jenny

Popular questions and responses by jenny
1. ## math

A spotlight is attached to the ceiling 2 feet from one wall of a room and 3 feet from the wall adjacent. How many feet is it from the intersection of the two walls? a. 4 b. 5 c. 3 square root of 2 d. square root of 13 e. 2 square root of 3

2. ## history

which describes a major obstacle nations encounter when dealing with rogue state such s north korea 1. the leaders of rogue states recognize no outside authority 2 a rogue states leadership may change without warning 3.a rogues state government secrets are

3. ## Math

If the product of 4 consecutive integers is equal to one of the integers, what is the largest possible value of one of the integers? The answer is 3, but I do not understand how it is 3. I tried writing out 4 consecutive #'s such as 1,2,3,4 or 0,1,2,3. 0 x

4. ## calculus

Two positive numbers have a sum of 60. what is the maximum product of one number times the square of the second number? a) 3481 b) 3600 c) 27,000 d) 32,000 e) 36,000 So Idk if this is right, but I have .... x+y=60 p=xy^2 p=x(60-x)^2 P'=-2x(60-x)+(60-x^2)

5. ## AP CHEM

What is the pKa for the acid HA if a solution of 0.65 M HA and 0.85 M NaA has a pH of 4.75? ~~~I know you find the ph by doing -log of pka; how do you do the reverse when you have molarity? I am completely lost. :-(

6. ## Physics

Hot air balloons float in the air because of the difference in density between cold and hot air. In this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. To do this, use the following variables

7. ## Physics

What is the diameter of a 1.00 meter length of tungsten wire whose resistance is 0.32 ohm (electrical resistance)?

8. ## Math

Ryan has 3/4 cup of pudding. How many 1/6 cup servings of pudding can ryan make

9. ## Physics

Two electrons exert a force of repulsion of 0.96 N on each other. How far apart are they? The elemental charge is 1.602 × 10 −19 C .

10. ## chemistry

b. Methanol, CH3OH, which can be used as a fuel, can be formed by the reaction between carbon monoxide and hydrogen as depicted in the following balanced equation. 2H2 + CO ¨ CH3OH Suppose 356 g of CO and 65 g of H2 are mixed and allowed to react. (i)

11. ## math

A Dish TV satellite dish is the shape of a paraboloid. The dish is 36 inches wide, and 8 inches deep. How many inches should the receiver be located from the vertex for optimal reception? (round to the nearest thousandth)

12. ## mathematics

Cand D are two observation posts on the same horizontal ground at the foot A of a vertical tower AB.the tower is 18m due north of D and 24m east of C.the angle of elevation of B from D is 35¡ã.calculate to three s.f the height AB,distance CD,angle of

13. ## Math: Reiny

I already posted this question, and Reiny had a question about the question. How many square units are in the region satisfying the inequalities y>=(x) and y

14. ## Statiatics

A student ran out of time on a multiple choice exam and randomly guessed the answers for two problems. Each problem had 5 answer choices a, b, c, d, e and only one correct answer. What is the probability that she answered neither of the problems correctly?

15. ## chemistry

how many grams of HNO3 can be produced if 225 grams of NO2 is mixed with 55.2 g of H2O? 3NO2 + H2O=2HNO3 + NO

16. ## Physics

Find the energy (in joules) of the photon that is emitted when the electron in a hydrogen atom undergoes a transition from the n=7 energy level to produce a line in the Paschen series.

17. ## algebra 2

What is the 16th term in the following geometric sequence? 5, –10, 20, –40, 80, ...

18. ## economics

A profit-maximizing firm in a competitive market is currently producing 100 units of output. It has average revenue so \$10, average total cost of \$8 and fixed cost of \$200. a. what is the profit? b. what is the marginal cost? c. what is its average

19. ## Chemistry

Suppose that 0.650 mol of methane, CH4(g), is reacted with 0.800 mol of fluorine, F2(g), forming CF4(g) and HF(g) as sole products. Assuming that the reaction occurs at constant pressure, how much heat is released? Substance & Enthalpy of Form. (kJ/mol)

20. ## Science

In a wet type of voltaic cell, what is the electrolyte? a. a bridge made of salt b. a copper strip c. an acidic liquid d. a spontaneous flow of electrons A believe the answer is C

21. ## Math

Simplify cos(x+y)-cos(x-y)

22. ## Chemistry

Rearrange the titration calculation to find Mb in a solution. If I put 13.2 mL of NaOH and 0.3 mL of phenolphthalein in 25 mL of KHP, what is the Mb of the solution? The original solution of NaOh is 100 mL and is composed of 1.069e-15 moles of H+, 9.445e-2

23. ## math

A jar consists of 21 sweets, 12 are green and 9 are blue. William picked 2 sweets at random. Find the probability that both sweets are blue.

24. ## U.S government

Which statement best expresses the meaning of the opening words of the U.S. Constitution, "We, the people..."? A. sovereignty is derived from the consent of the governed B. all citizens are guaranteed freedom of speech C. federal laws are subject to

The following is taken from a State of the Park Report for Banff National Park. Visitors Numbers Total Visitors: 2004= 3,135,727. 2005=3,164,906. 2006=3,281,435 Total visitor days: 2004= 7,453,465. 2005= 7,518,997. 2006= 7,784,044 Total visitors have

26. ## Chemistry

1. Balance the following half reactions in basic solution. ClO3- (aq) ¨ ClO4- (aq) Zn (s) ¨ Zn2+ (aq) BrO3- (aq) ¨ Br- (aq) IO3- (aq) ¨ I2 (s) Sn2+ ¨ Sn4+

27. ## math

a cycle company make bicycles, tricycles an unicycles. Last week they made 120 more bicycles than unicycles, and 4 times as many tricycles as unicycles. If they made 75 more bicycles than tricycles, how many unicyles did they make? I don't understand how

28. ## math

The sides of a square with an area of 49 cm2 will be reduced by a scale factor of 5/8. Determine the area of the reduced square to the nearest square centimetre.

29. ## physics

can someone please explain f1d1 = f2d2

30. ## Math-Statistics

Suppose you want to test the claim that mean is not equal 3.5. Given a sample size of n = 45 and a level of significance of a = 0.10, when should you reject H0 ? A) Reject H0 if the standardized test statistic is greater than 1.96 or less than -1.96 B)

31. ## Statistics

Thank you!! A survey of an urban university (population of 25,450) showed that 750 of 1100 students sampled attended a home football game during the season. What inferences can be made about student attendance at football games? Using the 99% level of

32. ## math

The cost of printing the first fifteen hundred copies of a book is \$1500. It costs y dollars to print each subsequent copy. The cost of printing the first 7500 copies of the book is \$7080. Find Y. Please explain how to solve it.

33. ## physics

Two charges separated by 1 meter exert a 1 N force on eachother. If the magnitude of each charge is doubled, the force on each charge is?

34. ## chemisty

If 26.5 mL of 0.222 M HCl reacts with excess Mg, how many mL of hydrogen gas are produced at STP?

35. ## math

There are 10 children (aged 1 to 10 years) who have equal amounts of money. In the first transaction the eldest child gives one rupee to every child younger to him. In the second transaction, the second eldest child gives one rupee to every child younger

36. ## math 2

judith has a necklace with a mass of 65.736 grams. what is the mass of her necklace rounded to the nearest tenth?

37. ## Trigg

In a predator/prey model the predator population is modeled by the function y=1000 sin (2t) +400. What is the smallest population according to this model?

38. ## stats

A salesperson goes door-to-door in a residential area to demonstrate the use of a new Household appliance to potential customers. She has found from her years of experience that after demonstration, the probability of purchase (long run average) is 0.30.

39. ## Math

Write the numeral 436eight in base ten

40. ## science

In experiments involving a pithball electroscope, what causes the pithball to move? I believe the answer is B A. The pith material always holds a natural positive charge, and it is attracted to other charged objects. B. Electrons jump onto or off the

41. ## math

Two trains leave stations 390 miles apart at the same time and travel toward each other. One train travels at 65 miles per hour while the other travels at 85 miles per hour. How long will it take for the two trains to meet?

42. ## Math

A number consists of two digits whose sum is 9.if 9 is subtracted from the number , the digits interchange their places.find the number please

43. ## Math

You were given two options of cars to rent to drive to California with renting prices listed below. The Honda Civic would cost \$15 plus \$0.50 per mile driven. The Ford Focus would cost \$25 plus \$0.25 per mile driven. Create an inequality to represent any

44. ## Math

Describe a scenario where you expect a set of data to have A.) a large standard deviation B.) a small standard deviation The prize for winning a contest can be chosen from category a or category b. Prizes from category a have a mean of \$1000 and a standard

45. ## AP CHEM

You need to use KH2PO4 and K2HPO4 to prepare a buffer with a pH of 7.45. Which of the following ratios of [base]/[acid] is required? For phosphoric acid, (H3PO4), Ka2 = 6.2 × 10–8. Do I use the Hasselbach equation?

46. ## Math

Micheal gave 1/12 of his money to Sally and 1/5 of his remaining money to Heidi. If he still had \$704, how much money did he have originally? The answer is \$960 I was told to take the fraction of what was left and multiply it by what Heidi took: 1/12 +

47. ## History

Advantages and disadvantages that ethnic neighborhoods offered to their residents? I previously did an essay of advantages and disadvantages of immigration to the U.S. and when I search online I am getting the same answers. So I am scared I answered one of

48. ## Algebra

the length of a rectangular piece of land is 40 cm more than two times its width. the perimeter is 680 cm. Find its dimensions

49. ## Chemistry

Which cannot be broken down chemically or physically into a simpler substance between sugar, salt, seawater, and copper?

50. ## math

the varsity football team gained 7 yards on one play and then lost 4 yards

51. ## algebra 2

Nine people are entered in a race. If there are no ties, in how many ways can the first three places be awarded? 3 252 472 504

52. ## chemistry

Is anyone know the molecular weight of 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone. i can't find it . Thanks

53. ## math

can I any one help me to find a formula to calculate 401K plans for my project? Thanks Compound Interest With compound interest, the interest due and paid at the end of the interest compounding period is added to the initial starting principal to form a

54. ## Algebra

Solve graphically the system of linear equations: x+y=0 −3x+4y=14

55. ## Algebra

Find the value of the variable such that: the value of 5−a is 20 greater than the value of 6a−1

56. ## Chem II

How many grams of ethylene glycol (C2H6O2) per kilogram of water are needed to give protection up to 120 °C in a car radiator?

57. ## math

The world's tallest building is the Burj Khalifa in Dubai at 828 m tall. The CN Tower in Toronto is 553 m tall. Ryan wants to compare the Burj Khalifa and the CN Tower by creating rectangular prism models on a 10 cm by 10 cm square base. He has decided to

58. ## RMS Speed

A gas is at 20°C. To what temperature must it be raised to triple the rms speed of its molecules? Ans: 2364oC I don't get how they got the answer. Please help!

59. ## Math

Write a phrase for each expression 7hb

60. ## Math

In Mathematics: how much interest will you have to pay for a credit card balance of \$554 that is one month overdue if a 20% annual rate is charged?

61. ## calculas

The function f(x)= (8x-7)e^2x has one critical number. Find it

62. ## Chemistry

Which of the following is most likely to LOSE electrons when forming an ion? a. F b. P c. S d. Rh e. Se

63. ## Math

Two dice are rolled. Find the odds that the score on the dice is either 10 or at most 5

64. ## Macro Economics

Assume that the position of a nation's aggregate demand curve has not changed, but the long-run equilibrium price level has declined. Other things being equal, which of the following factors might account for this event? a. increase in labor productivity

65. ## Physics

The three vectors have magnitude a =3m, b= 4m and c=10m . On the x axis is vector a at 0 degrees then 30 degrees is vector b then 120 degrees is vector c. If vector c =p*vector a + q*vector b .What are the values of p? and q? I am expose to get -6.67 for p

66. ## physics

A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward one another along a straight, level track. When they are 950m apart, each engineer sees the other’s train and applies the brakes. The brakes decelerate each train

67. ## Algebra

Father can paint the fence of their garden in 2 hours working alone. His son, alone, can paint the fence in 3.5 hours. How long will it take them to paint the fence together?

68. ## Algebra

Write as a monomial in standard form:(–0.6m^3n^2)^3

69. ## Chemistry

For the following reaction, the partial pressures are listed in the table: Substance Equlibrium H2S 5.4 I2 1.2 HI 0.43 S 7 If the Kp of the reaction is 0.134, which direction would the reaction need to go to establish equilibrium? H2S(g) + I2(s) 2HI(g) +

70. ## geometry

2. the dashed triangle is a dilation image of the solid triangle. what is the scale factor (1 point)

71. ## statistics

In a test of the effectiveness of garlic for lowering cholesterol, 47 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes in their levels of LDL cholesterol (in mg/dL)

72. ## Physics

A skier swoops down a hill and over a ramp. She starts from rest at a height of 18m, leaves the ramp at an angle of 45 degrees, and just clears the snowman on her way down, making an angle of 30 degrees with the vertical as she does. Assuming that there is

73. ## MATH

Victor Malaba has a net income of \$1,240 per month. If he spends \$150 on food, \$244 on a car payment, \$300 on rent, and \$50 on savings, what percent of his net income can he spend on other things?

74. ## operations management

Analysis of the output of a process has suggested that the variability is nonrandom on several occasions recently. However, each time an investigation of the process has not revealed any assignable causes. What are some of the possible explanations for not

75. ## Math

Write each rate as a fraction in lowest terms: 48 gallons in 14 minutes

76. ## consumer math

Lily Adams purchased a \$1,000 bond at 70. The bond pays 4%. What was the cost of the bond? What was the annual interest? What is the yield (to the nearest tenth of a percent)?

77. ## consumer math

Joe McCain purchased 5 \$1,000 bonds at 89. The bonds pay 6%. What was the cost of the bonds? \$4,450 ? What was the total annual interest? What is the yield?

78. ## maths

binary operation m.n=m2+n is associative or commutative?

79. ## Grammar

Proofreading.. PROCEDURE: The patient was prepped and draped in the usual sterile fashion. Examination of the vocal chords in a sitting position revealed a poly-poid growth in front of the left false vocal cord with erythematous base and yellow colored

80. ## Physics

An enemy ship is on the western side of a mountain island. The enemy ship can maneuver to within 2520 m of the 1850 m high mountain peak and can shoot projectiles with an initial speed of 260 m/s. If the eastern shoreline is horizontally 305 m from the

81. ## chemistry

5. Compound A has a MW of 283. 0.423g of Compound A is dissolved in 13.5mL of water and 1mL of the solution added to 5mL of water to produce “solution A”. What is the concentration of Compound A in “solution A”?

82. ## pre- algebra

Tell weather a triangle with side lengths of 10,24,26 could be 45 45 90 degrees or 30 60 90 degrees. Explain.

83. ## Chemistry

At 35 degrees Celcius, K = 1.6x10^-5 for the reaction: 2NOCl 2NO + Cl2 If 2.0mol NOCl and 1.0mol Cl2 are placed into a 1.0-L flask, calculate the equilibrium concentrations of all species. Answer: [NOCl] = 2.0M [NO] = 8.0x10^-3 [Cl2] = 1.0M --------- What

84. ## english

how does the first ten mins of the film remember the titans capture the audiences attention?

85. ## calculus

if h(t) represents the height of an object above ground level at time t and h(t) is given by h(t)=-16t^2+13t+1. find the height of the object at the time whent eh speed is zero

86. ## Physics

A flea is able to jump straight up about 0.49 m. It has been said that if a flea were as big as a human, it would be able to jump over a 100 story building! When an animal jumps, it converts work done in contracting muscles into gravitational potential

87. ## Physics

An object falling under the pull of gravity is acted upon by a frictional force of air resistance. The magnitude of this force is approximately proportional to the speed of the object, which can be written as f = bv. Assume b = 19 kg/s and m = 59 kg. What

88. ## Statistics

The seasonal output of a new experimental strain of pepper plants was carefully weighed. The mean weight per plant is 15.0 pounds, and the standard deviation of the normally distributed weights is 1.75 pounds. Of the 200 plants in the experiment, how many

89. ## Math

Aleka has a box for keepsakes that has a volume of 576 cubic inches. The length of the box is 12 inches and the width is 8 inches. What is the height of the box?

90. ## MATH

Determine which state is more poorly represented. State A with a population of 277,200 and 11 representatives or state B with a population of 576,000 and 16 representatives. State A is more poorly represented because it has the smaller average

91. ## Math

The American flag is customarily made in the ratio of 10 to 19 which of the following dimensions are not in the correct ratio for the flag ?

92. ## Math

Laura bought a pair of shoes priced at \$20.00 if the sales tax rate in Laura's state is 6% what is the total price of the shoes ?

Chef Potato's body has a cylinder in the middle and two half spheres that make up his bottom and head. He has the two dimensional shape measurements as follows: 20 cm in total length, 5 cm between the end of the cylinder and the top of the top sphere.

94. ## Math(Scale Factors and Scale Diagrams)

Sarah's dad found a table hockey game with dimensions 9 1/4 inches by 4 15/16 inches. Unfortunately, this game was only 1/4 the size of the table top hockey game he wanted. Determine the dimensions of the table Sarah's dad wanted. Please help me with this,

95. ## Chemistry

Iron and oxygen gas can react to form the magnetic oxide of iron Fe3O4. How many grams of Fe3O4 can be made from 42.3 g of Fe?

96. ## Spanish

How can I form a sentence with these words? la / Juanita / las hijas / ser / de / mayor

97. ## geometry

the vertices of a triangle are p(-7 -4),q(-7,-8),and r(3,-3).Name the vertices of the image reflected across the line y=x. the choices are A. P'(4,7),Q'(8,7),R'(3,-3) B. P'(4,-7),Q'(8-7),R'(3,3) C. P'(4-7),Q'(-8,-7),R(-3,3) D. P'(-4,7),Q'(-8,7),R'(-3,-3)

98. ## Statistics

The image of the public library is constantly changing, and their online services continue to grow. Usage of the library's home page grew by 17% during the past 12 months. It has been estimated that the current average length of a visit to the library's