# dina

Most popular questions and responses by dina
1. ## geometry

an angle is equal to one-third its complement what is the angle?

2. ## math

Gabriela has dinner at a cafe and the cost of her meal is \$45.00Because of the service, she wants to leave a 15% percent tip. What is her total bill including tip?

3. ## Chemmmm =(

Which ion in each of the following pairs would you expect to be more strongly hydrated? (a) Na+ or Mg2+ Why? thanks!!

4. ## Chemistry

Zinc metal reacts with hydrochloric acid according to the following balanced equation. Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) When 0.114 g of Zn(s) is combined with enough HCl to make 51.1 mL of solution in a coffee-cup calorimeter, all of the zinc reacts,

5. ## chemistry

was hoping someone can help me check if these answers make sense for a silver copper alloy lab. 3. Why don’t you have to weigh the sodium chloride on a sensitive balance? This one I am not sure about, It is because an excess of NaCl is needed to make

6. ## Chemistry

I have .8ml of 35% by weight hydrogen peroxide. The hydrogen peroxide density is 1.14 g/ml. how many moles of hydrogen peroxide are there?

7. ## Chemistry1

The questions asks to write a word equation and a balanced chemical equation for a reaction between aqueous copper (ii) sulfate and solid iron. Assume that iron forms the Fe2+ ion.) Include proper states of matter after each substance (s, l, g, aq). Here

8. ## Chemistry pH

What is the pH of 4.7 M CH3NH3Cl. mehyl-amine, CH3NH2, Kb = 4.4 × 10-4. Do I find Ka first then take the -log(Ka) to find the pH of 4.7M CH3NH3Cl? or do I need to make I.C.E. table?

9. ## PHYSICS?

1300 kg car rounds a banked curve of radius= 50m. If car traveling at 75 km/h and the coefficient of static friction between the tire and road is 0.45 ... 1.) what is the minimum angle of the bank needed to keep the car in the turn? 2.) If the car changes

10. ## physics 1

Problem 1) I don't understand how they got the answers for A) and B) : Ima Rushin can travel from Milwaukee Avenue to the school entrance gate at a constant speed of 22.5 m/s when the lights are green and there is no traffic. On Wednesday, Ima is stopped

11. ## CHEM

SAPPHIRE AND DIAMOND RING ,STAMPED 14K S&S WHAT DOES THIS MEAN?

12. ## physics

A tortoise and a hare are having a 1000-meter race. The tortoise runs the race at a constant speed of 2.30 cm/s. The hare moves at an average speed of 1.50 m/s for 10.0 minutes and then decides to take a nap. After waking up from the nap, the hare

13. ## physical science

A car travels through a school zone at a speed of 36 m/s was the 45 mi/h speed limit exceeded? yes or no

14. ## chemistry

how can i compare the dual nature of light how can i describe the phenomena that can be explained only by the particle model of light. how can i empoly the quantum theory to assess the amount of energy that matter gains and loses how did Einstein utilize

15. ## geography

a delta is a: a.wid river mouth where tides are experienced b.long narrow arm of the sea resulting from the submergence of a glaciated valley c.fan-shaped piece of land at the mouth of a river,resulting from deposition by the river d.funnel-shaped drowned

16. ## Economic

A Giffin good is not correctly described by which of the following? A)A Giffin good must be an inferior good. B)A Giffin good must be such that the income effect and the substitution effect move in opposite directions, and the income effect outweighs the

17. ## math

suppose walmart stock is selling at \$59 a share and mattel stock is selling at \$28 a share. Amy waller has a maximum of \$6000 to invest. she wishes to purchase four times as many shares of walmart as of mattel. only whole shares of stock can be purchase.

18. ## k12

which of the following assessments types has the greatest effect on your overall

19. ## Algebra

You are going to write a fairy tale! Your story should include all of the standard elements of fairy tales. Begins “Once upon a time … ” Animals can act like humans. Involves magical items or helpers. Ends “ … happily ever after.” Your story

20. ## physic

A pig slides down a 29° incline in twice the time it would take to slide down a frictionless 29° incline. What is the coefficient of kinetic friction between the pig and the incline?

21. ## physics

What is the change in kinetic energy of a baseball as it accelerates from rest to 45.0 m/s? The mass of a baseball is 145 grams. answer in joules

22. ## Chemistry

How many grams of ice at -14.0 degree Centigrade can be completely converted to liquid at 13.7 degree Centigrade if the available heat for this process is 5.91×10^3 kJ? For ice, use a specific heat of 2.01J/(g.degree Centigrade}) and H2 = 6.01 kJ/mol.

Hi I was wondering if anyone can help me edit/proofread my english essay =)

24. ## math

suppose walmart stok is selling at 59 dollars a share and mattel stock is selling at 28 a share. amy waller has a maximum of 6000 dollars to invest. she wishes to purchase four times as many shares of walmart as of mattel. only whole shares of stock can be

25. ## physic

As discussed in Example 4-7, the archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish's mouth. Suppose the archerfish squirts water with a speed of 1.4 m/s at an angle of 50.0° above

26. ## Probability

Consider a deck of 52 cards with the following characteristics: 13 red cards, numbered 1 through 13 13 blue cards, numbered 1 through 13 13 green cards, numbered 1 through 13 13 black cards, numbered 1 through 13 1. Describe the steps necessary to

Simplify the expression. 3 [ (15 - 3)^2 / 4] a. 36 b. 108 c. 18 d. 9

28. ## Chem again sorry

A solution of sodium chloride in water has a vapor pressure of 18.3 torr at 25°C. What is the mole fraction of NaCl in this solution? __________ What would be the vapor pressure of this solution at 45°C? The vapor pressure of pure water is 23.8 torr at

29. ## Chemistry

3. suppose a gas at STP. Calculate its pressure at 25 degrees celcius if volume remains unchanged 5. suppose 1.11 L of an unknown gas in a rigid container constant volume is cooled from 22 deg. C to -55 deg C. Calculate the new pressure of the gas 6.)

A person with type A behavior: is always in a hurry. gets a heart attack at an early age. is impatient and angry. wants success at any price

31. ## chemistry; Lab questions help=)

was hoping someone can help me check if these answers make sense for a silver copper alloy lab. 3. Why don’t you have to weigh the sodium chloride on a sensitive balance? This one I am not sure about, It is because an excess of NaCl is needed to make

32. ## chemistry

Hello, I am having problem with two lab questions and was wondering if someone can help! 1. Calculate the percentage of the empty space in a face-centered cubic lattice, and show that it does not depend on the edge length of the unit cell ot on the size of

33. ## Calc

As I solve this problem, it is undefined. Can you explain how you get 3 or 0. One of this is the answer but I'm not sure. lim as y approaches 0 6x^2 (cot y) (csc2y): A. 3 B. 0

34. ## Chemistry

What mass of water is needed to completely react a 8.1 g packet of magnesium

35. ## Physics

This is another question I had too and didn't understand as well. Vector Addition: Use the head to tail method to determine the resultant vector of the following velocity vectors. V1= 540m/s @66 degrees V2= 12m/s @182 degrees V3= 96m/s @312 degrees V4=

36. ## Math

A herd of 100 deer is introduced onto a small island. At first the herd increases rapidly, but eventually food resources dwindle and the population declines. Suppose the number of deer, N(t), after t years is described by the polynomial function: N(t)+

37. ## math

The amount of paint an electric paint sprayer applies varies directly with time. A sprayer is set to apply 0.5 gallon in 2.5 minutes. Write an equation that gives the amount P of paint as a function of the time T. How much paint is applied if the sprayer

38. ## science please no websites

could you please give me an example of the following(types of friction) : -static -sliding And also: -friction -buoyant force -air resistance Thank You!

39. ## french

Can someone help me correct these phrases? Avant que j'ai choisi qu'école a laquelle... I wanted to say 'Before I chose the school where....'

40. ## chemistry

Can anyone help me with these Chemistry questions? I am trying to study for an upcoming test and its just not sinking in as well and I thought. This is Thermochem for a heads up: Suppose 33mL of 1.20M HCl is added to 42mL of a solution containing excess

41. ## french - final draft

Well.. i posted this before and I re-edited a few things. I need suggestions and editing please :)

42. ## math

Ali is planning to keep fit through practicing push-ups for 21 days. on the first day, he can only do 14 push-ups in a minute. He plans to do x more push-ups in a minute on the next day. How many push-ups can he do in a minute on 11th days? (in term of x)

43. ## social studies

Treasury inflation protection bonds pay: fixed interest plus an adjustment for inflation. a return that exceeds twice the inflation rate. fixed interest that exceeds the rate of inflation. a rate that combines the unemployment and inflation indices.

44. ## social studies

Groupthink is likely to occur when: anger within the group has been growing. the need arises for a group opinion. almost no conflict is expressed within the group. the group is composed of an even number of people.

45. ## Economic

The market for Good X can be depicted with the following demand and supply equations: Demand: P = 50 – 1/2Q Supply: P = 1/3Q Where P is price per unit and Q represents quantity in units. Policy makers plan on imposing a \$1 per unit tax on this good.

46. ## Economics

Multiple choice 1. If the friend offers to pay you \$1 five years from today, the net present value will: A)be higher than \$1. B)depend upon the interest rate offered. C)be equal to zero since you don't have the dollar. D)not be important in understanding

could you please give me an example of the following(types of friction) : -static -sliding And also: -friction -buoyant force -air resistance Thank You!

48. ## french

Can someone help me correct these phrases? Avant que j'ai choisi qu'école a laquelle... I wanted to say 'Before I chose the school where....'

50. ## Gov.

A. Should Congress be able to regulate private business activity? For example, should they be able to set rules or laws that doesn't allow a small business owner from refusing someone service based on their religion, race, nationality, age or something

51. ## Government

Labor group: Student labor union (I am in the labor group!) Employer group: Administration of school _____________________________________ Directions: negotiate the student/admin contract (Some of these points from a realistic standpoint I wouldn't agree

52. ## Math

You are given the following equation SIX + SIX + SIX + SIX + SIX + SIX = TRI where each letter stands for a digit. The value of SIX is ......

53. ## American Gov.

I'm having trouble finding the answers to these questions (the answers should be in order from the article, it's just not clarifiable. Also, I put ****** .... ***** to show where the answers may be that I think is right, but I'm not sure)... 2. How does

54. ## management

which one of the following philosophies makes every employee a quality inspector for his or her own work

55. ## Chemistry

how do you make 50ml of .1 molar solution of benzylamine in acetonitrile

56. ## Algebra Help

You are going to write a fairy tale! Your story should include all of the standard elements of fairy tales. Begins “Once upon a time … ” Animals can act like humans. Involves magical items or helpers. Ends “ … happily ever after.” Your story

57. ## Chemistry pH

What is the pH of a solution that contains 0.30 M HC2H3O2 and 0.95 M C2H3O2-? Use Ka = 1.8 × 10-5 for HC2H3O2.

58. ## chemistry

What is the definition of an equivalent? a lab procedure requires 1.25 equivalents of zinc powder. How do I determine how much zinc that is?

59. ## social studies

In an attempt to make a sound vocational choice, Jared studies the Occupational Outlook Handbook. He is practicing the strategy referred to as: seeking professional help. finding occupational facts. getting firsthand experience. matching your career to

60. ## Physical science

A chair lift holding a 100 kg man rises 5 meters in height in 10 second time period. Ignore the weight of the chair and related machinery and answer the following: How much power is required, in Watts?

61. ## science

when did the first carbon data take place

62. ## chemistry help!

Hello, I am having problem with two lab questions and was wondering if someone can help! 1. Calculate the percentage of the empty space in a face-centered cubic lattice, and show that it does not depend on the edge length of the unit cell ot on the size of

63. ## Abstract Algebra

If 2^n>n^2 and n>5, then 2^n+1>(n+1)^2 Proof: Assuming that 2^n>n^2 then I can say that 2*2^2>2*n^2 = 2^n+1>2n^2 If I can show that 2n^2>(n+1)^2 then I will be done by transitivity. So 2n^2>(n+1)^2? then 2n^2>n^2+2n+1? then n^2>2n+1, hence n^2-2n-1>0, and

64. ## service management

If another mechanic is hired, fill up the table below and answer the following questions (1pt): a. Which configuration has the lowest Ls? b. Which configuration has the lowest Ws? c. Which configuration has the lowest Wq? d. Which configuration has the

65. ## Chemistry 101

Which calorimeter do you use for determining the specific heat of the metal, the thermos or the Styrofoam cup?

66. ## Physics

Vector Addition: I know you can't physically do drawings on this site. Is there a way of someone explaining how to begin with this problem. Can I chose any scale. The directions said to use the head to tail method to determine the resultant vector of the

67. ## physics

You and a friend stand on a snow-covered roof. You both throw snowballs from an elevation of 18 m with the same initial speed of 11 m/s, but in different directions. You through your snowball downward, at 40° below the horizontal; your friend throws her

68. ## Precal

Given f(x) and g(x) below, find: (a) f + g (b) f – g (c) f*g (d) f/g Please show all of your work. f(x) = x + 5 g(x) = 5x^2+15x-3

69. ## social studies

To develop your self-confidence: learn to rely mostly on intuition. develop a base of knowledge for problem solving. use enough negative self-talk to appear humble. downplay acquiring a lot of facts.

70. ## social studies

A likely question (or request for information) that you'd probably hear during a behavioral interview would be: "Describe your worst behavioral traits." "Describe your best behavioral traits." "Explain to me how you handled a customer emergency." "What

71. ## social studies

Which of the following is the best example of a cultural norm? The average height of adults How much respect is given to older people The average year-round temperature The age of the civilization

72. ## social studies

Finding out what your boss expects of you relates to the theory of: leadership. goal setting. human relations. defense mechanisms.

73. ## algebra

factor completely 25c^2-81

74. ## science

how can two observers measure a different speed for the same moving object

75. ## french

Can someone help me correct these phrases? Avant que j'ai choisi qu'école a laquelle... I wanted to say 'Before I chose the school where....'

76. ## french

Can someone help me correct these phrases? Avant que j'ai choisi qu'école a laquelle... I wanted to say 'Before I chose the school where....'

77. ## french

Can someone help me correct these phrases? Avant que j'ai choisi qu'école a laquelle... I wanted to say 'Before I chose the school where....'

78. ## elementary aed 201

Identify internal and/or external rewards that impact recruitment and retention of quality teachers. How do such rewards influence recruitment or retention? How might these rewards shift as new accountability-centered teacher reforms are proposed (such as

79. ## math

(sec(of theta)+1)(sec(of theta)-1)=tan^2(of theta)

80. ## Math

Figure (N) 1 2 3 Number of Coin (C) 4 7 10 Find Formula

81. ## PHYSICSHELP

For the Atwood's Machine so the mass on the right side is 5 kg box which is 3m from the *table (represents the straight line)* The left side of the pulley is 2kg box which is at the table. 1.) How do you know or what do you know about the force of tension

82. ## English

I'm having trouble putting together a thesis and topic sentences. There is so much great information with my sources, everything seems to sound the same. This is a layout of how my topics could be arranged and organized . I don't know how to do a good

83. ## World History

This is only part of the whole passage. What is the best way to simplify the horrific event because all this info is great to to include in my Summary but I don't want to include it all. ______________________________________ In the Republic of

84. ## probability

when it rains, there is a 20% chance that Jamie will go to the gym. When it does not rain, there is a 60% chance that Jamie will go to the gym. there is a 40% chance that it will rain tomorrow. a. what is the probability that Jamie will go to the gym b. if

85. ## math

when it rains, there is a 20% chance that Jamie will go to the gym. When it does not rain, there is a 60% chance that Jamie will go to the gym. there is a 40% chance that it will rain tomorrow. a. what is the probability that Jamie will go to the gym b. if

86. ## algebra

evaluate x^0 when x = negative 3

87. ## ALGEBRA 2 (LOGARITHMIC FUNCTIONS)

These are some I chose to practice but I have a hard time knowing how to do it. The answers are online but that doesn't help. These deal with logarithmic functions etc. PLEASE HELP! THANKYOU 1.)solve the equation: 3^(x+1)=27^(x+3) 2.) e^x=5 3.) 2^(3x)+9=25

88. ## Algebra

What is the product of 9/x-1*7/x-3

89. ## algebra

How do I solve this problem? 3x-2/3x=4/3

90. ## science

how does the thinning of the ozone layer protect your health?

91. ## trig

To the nearest degree, determine the measure of

92. ## Math

A wooden block that is a rectangular prism is 12 inches long. Melinda cuts the wooden block along its length into 4 cubes. How long is each side of the cube?

93. ## social studies

As a result of reengineering, work processes are: radically redesigned and simplified. turned over to outside companies. made much more complex. controlled by computer programs.

94. ## social studies

In the hostile environment form of sexual harassment, the harassed person: does not get a fair hearing for the complaint. suffers from a job loss for having filed a complaint. suffers from a job loss for refusing to grant sexual favors. may not necessarily

95. ## Science Please I NEED Help!!!!!!!!!!!!!!!!!!!!!!!!

Describe how the instantaneous speed of a car changes when the car is moving with constant speed , speeding up, and slowing down please answer as soon as possible

96. ## Science please i need help!!!!!!!!!!

how can two observers measure a different speed for the same moving object

97. ## geography

natural banks which are sometimes built up by a river along the edges of its channel are called: a.river bluffs b.river cliffs c.levees d.slip-off slopes

98. ## geography

which of the following group of rocks can be easily dissolved in water? a,sandstone,granite and obsidian b.limestone,granite and basalt c.quartz,schitz and chalk d.limestone,chalk and sandstone