# sydney

Popular questions and responses by sydney
1. ## Cylinder Height

A cylinder has surface area of 402 cm2. The height is three times greater than the radius. What is the height of the cylinder?

2. ## Calculus

You have just opened a new nightclub, Russ' Techno Pitstop, but are unsure of how high to set the cover charge (entrance fee). One week you charged \$9 per guest and averaged 165 guests per night. The next week you charged \$10 per guest and averaged 150

3. ## Physics

A bathysphere used for deep sea exploration has a radius of 1.50 m and a mass of 1.20 × 104 kg. In order to dive, the sphere takes on mass in the form of sea water. a) Determine the mass the bathysphere must take on so that it can descend at a constant

4. ## Chemistry

This question may seem obvious however my class never went over this particularly so I wanted to make sure I understand this concept. How does too little acid cause gastric distress? A. The pH of the stomach becomes so low that proteins are not digested

5. ## Chemistry

Hi again, I just wanted to check something as the question/answers are vague for this test. How will an increase in temperature affect equilibrium? A. The equilibrium shifts in the direction of the endothermic reaction. B. There is no effect of temperature

6. ## Math

The fifth term of an exponential sequence GP is greater than the fourth term by 13 whole number 1over 2 and the fourth term is greater than the third term by 9.find the answer to the common ratio

7. ## Physics

Two children are playing on two trampolines. The first child can bounce 1.6 times higher than the second child. The initial speed up of the second child is 5.2 m/s. (a) Find the maximum height the second child reaches. (b) What is the initial speed of the

8. ## Rate based Calculus Question help

Electricity is consumed between the hours of midnight (t = 0) and 6 a.m. (t = 6). Selected values of the rate of consumption are shown in the table below, with t measured in hours past midnight, and R(t) measured in KW per hour. Use 4 trapezoids to

9. ## college algebra

A support pole for an ancient structure is found to have one-fifth of the carbon-14 of a modern, living tree. How long ago did the tree used to make the support pole die? Give your answer to the nearest whole number.

10. ## Math

Peter has money in two savings accounts. One rate is 9% and the other is 11%. If he has \$400 more in the 11% account and the total interest is \$117, how much is invested in each savings account?

11. ## algebra

Mary drove from Amity to Belleville at a speed of 50 mi/h. On the way back, she drove at 60 mi/h. The total trip took 4(2/5)h of driving time. Find the distance between there two cities

12. ## Chemistry

I might be overthinking this but my reference books, note and the internet don't have much on this topic. What is the relationship between the solubility product constant Ksp and temperature? A. They are directly proportional B. The two are unrelated C.

13. ## algebra 1

How many solutions does this system have-2x+y=3 6x=9-3y A. one B. none C. infinite D. two A??

14. ## chemistry

A 100.0 mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. Determine the pH of the solution before the addition of any KOH. The Kb of NH3 is 1.8 × 10-5. I thought that I would need a second volume to find the moles of NH3?

15. ## Algebra

Sally can paint a room in 4 hours while it takes Steve 7 hours to paint the same room. How long would it take them to paint the room if they worked​ together?

16. ## math

Mr. Rozario bought some numbers of apples and oranges in a ratio of 2:3. He gave away 2/3 of the apes to his sister and 23 oranges to his brother. The ratio of the number of apples to the number of oranges that he has now is 3:2. How many apple did he buy?

17. ## Chemistry

You are in a mountain range with atmospheric air pressure of 520 , and you wish to boil some eggs. What is the approximate boiling point of the water at this air pressure? Express your answer as an integer and include the appropriate units.

18. ## Chemistry

How many valence electrons are in carbon tetrachloride?

19. ## Chemistry

How mush CaCl2, in grams, is needed to make 2.0 L of a 3.5M solution? g CaCl2 = (2.0L) *( 3.5 mol Cl-/1L) * (1mol CaCl2/ 2mol Cl-) *( 110.98 g CaCl2/ 1 mol CaCl2) = 5.549 g CaCl2 i don't think i did any of this right

20. ## Physics... HELP

A toy car runs off the edge of a table that is 1.225 meters high. If the car lands 0.400 meters from of the table, a. How long does it take for the car to fall? b. What is the horizontal velocity of the car?

21. ## Geography

conduct research to examine the sphere of influence of an organisation that renders a service in a community .eg.clinic,hospital,a local high school

22. ## Math

Dori claims that 3.52 is not a rational number because it is not written as a ratio of integers. Is she correct? Explain why or why not.

23. ## physics

A 10.7 g mass is attached to a horizontal spring with a spring constant of 12.6 N/m and released from rest with an amplitude of 37.8 cm. What is the speed of the mass when it is halfway to the equilibrium position if the surface is frictionless?

24. ## math

greg exchanged 200 canadian dollars for 1/5 fewer u.s dollars. after spending 3/4 of the u.s dollars, how many did he have left?

25. ## Math

Identify the group that does not contain equivalent fractions, decimals, and percents

26. ## chem:ionic equations

write below the complete ionic equation for the reaction of magnesium phosphate with lead(II)nitrate. Include which ions will be aqueous and which compound will precipitate. I understand how to balance the equation, but the example they give me is

27. ## Chemistry

Consider this reaction: Fe3O4(s)+4CO(g) --> 4CO2(g)+3Fe(s). If you begin with 0.03820 moles of iron oxide and 0.120 moles of carbon monoxide, how many grams of iron can be formed? Indicate which reactant is the limiting reactant. 0.03820 x 3/1= 0.1146

28. ## Algebra

The scale on a map is approximately 3/4 inch to 9 miles. If the distance from city A to city B measures 7.5 inches on the​ map, how far apart are the two​ cities?

29. ## College Physics

Col. John Stapp led the U.S. Air Force Aero Medical Laboratory's research into the effects of higher accelerations. On Stapp's final sled run, the sled reached a speed of 284.4 m/s (632 mi/h) and then stopped with the aid of water brakes in 1.4 s. Stapp

30. ## Physics

A 90 m long train begins uniform acceleration from rest. The front of the train has a speed of 21 m/s when it passes a railway worker who is standing 184 m from where the front of the train started. What will be the speed of the last car as it passes the

31. ## Physics

A person driving her car at 54 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow light lasts only 2.0 s before turning to red, and she is 30 m away from the near side of the intersection. The intersection is

32. ## history

1)the seond Continental Congress did all the the following except a)approve a ban on exports and imports with Great Britain. B)appoint George Washington military commander. 2)the first contnental congress did all the following except a)create a colonial

33. ## Pre-Calculus

Find all solutions and leave answers in trigonometric form. x^2 - i = 0 Please help! I have no idea how to solve this!

34. ## Math

Use the addition property​ and/or the multiplication properties to find a and b. If -4

35. ## Alg/Trig

If h= -16t^2 + 112t represents the height of a​ rocket, in​ feet, t seconds after it was​ fired, when will the rocket hit the​ ground? (Hint: The rocket is on the ground when h equals=​0).

36. ## Language Arts

Could you please help me with these answers, I'm having serious trouble with this. What is the prepositional phrase in this sentence? Late last night there was a loud knock at the door. A. Late last night B. there was C. a loud knock D. at the door What is

37. ## Physics, HELP

AN auto, moving too fast on a horizontal stretch of mountain road, slides off the road, falling into deep snow 43.9 meters below the road and 87.7 meters beyond the edge of the road. a. How long did the auto take to fall? b. How fast was it going when it

38. ## statistics

Suppose you wanted to test your ESP using an ordinary deck of 52 cards, which has 26 black and 26 red cards. You have a friend shuffle the deck and draw cards at random, replacing the card and reshuffling after each guess. You attempt to guess the color of

39. ## Physics

Suppose two boxes on a frictionless table are connected by a heavy cord of mass 1.0 kg. Calculate the acceleration (magnitude) of each box and the tension (magnitude) at each end of the cored, using the free-body diagrams shown in Figure 4-53. Assume FP =

40. ## FRENCH

Est-ce que tu preferes voyager en voiture, en avion ou en train? Je prefere voyager en voiture. Est-ce que tu preferes passer une journee a la campagne ou a la ville? Je prefer passer une journee a la campagne parce ( Please help me think of some

41. ## Math

An airplane is flying 100 km north and 185 km west of an airport. It is flying at a height of 7 km A) what is the straight long distance to the airport? B) what is the angle of elevation of the airplane, from the point of view of the airport?

42. ## physics. HELP

Phil jumps off a high-diving platform with a horizontal velocity if 2.8 m/s and lands in the water 2.6 seconds later. a. How high is the platform b. How far out from where he jumped does he land?

43. ## math

A model rocket is launched with an initial velocity of 160 ft/s. The height, h, in feet, of the rocket t seconds after the launch is given by h = −16t2 + 160t. How many seconds after launch will the rocket be 350 ft above the ground? Round to the nearest

44. ## Logarithm

The rate of auto thefts triples every 6 months. (a) Determine, to two decimal places, the base b for an exponential model y = Ab^t of the rate of auto thefts as a function of time in months. b = (b) Find the doubling time to the nearest tenth of a month.

45. ## Chemistry

A 100 mL sample of 0.10M HCl is mixed with 50mL of 0.10M NH3 (Kb=1.8x10^-5). What is the resulting pH?

46. ## Chemistry

A 100 mL sample of 0.10M HCl is mixed with 50mL of 0.10M NH3 (Kb=1.8x10^-5). What is the resulting pH?

47. ## College Algebra (Functions)

The relation is a function containing two ordered pairs. Reversing the components in each ordered pair results in a relation that is not a function. A) {(0, 2), (0, 3)} B) {(2, 3), (3, 2)} C) {(3, 1), (4, 1)} D) {(4, 5), (2, 3)}

48. ## physics

The x component of a certain vector is -86.0 units and the y component is +75.0 units. The magnitude of the vector is 114 m. What is the angle between the direction of the vector and the positive direction of x? Use the convention that positive angles are

49. ## Chemistry

So I had a test question that asked the following, "What will happen when a reactant is added to a system at equilibrium?" The answers are A. more reactants will form B. The system will remain at equilibrium C. Only the concentration of the reactant will

50. ## math

Before graphing equations, how can you determine whether a system of equations has exactly one solution, infinitely many solutions, or no solution?

51. ## Geography

If you search analyzing a political cartoon by Gary Bookins, it's should be the first link (a PDF) It's an analyzing a political cartoon it's page 60 on the website!! 31. Who or what does the lifeguard represent? 33. Who or what helped identify the

52. ## Chemistry

Aluminum reacts with oxygen gas to produce aluminum oxide. How many moles of aluminum oxide would you expect to produce if you reacted 14.5 moles of oxygen gas with excess aluminum? 4Al +3O2 --> 2Al2O3 14.5 mol O2 x 4 mol Al / 3 mol O2 = 19.3 moles

53. ## Art HELP PLEASE!! part 2

Artists make shapes in the backgroud smaller than shapes in the foreground to communicate their distances from the viewer. How else might a landscape artist show shapes in the background to depict their distances from the viewer? A. show shapes with

54. ## algebra

A clock has a minute hand that is 14 feet long and an hour hand that is 9 feet long. What is the average speed (in mph) of the tip of the minute hand no idea how to solve this... please help :)

55. ## math

suppose x is a uniform random variable with c=40 and d=70. find the standard deviation of x

56. ## physics

An athlete executing a long jump, leaves the ground at a 30 degree angle with the ground and travels 8.90 meters horizontally in 1.1 seconds. What was the takeoff speed of the athlete along the diagonal?

57. ## physics

A missile is fired horizontally with an initial velocity of 300 m/s from the top of a cliff 200.0 meters high. a. How long does it take the missile to reach the bottom the cliff? b. How far from the base of the cliff does the missile strike the ground?

58. ## physics

An ethernet cable is 3.95 m long and has a mass of 0.190 kg. A transverse pulse is produced by plucking one end of the taut cable. The pulse makes four trips down and back along the cable in 0.820 s. What is the tension in the cable?

59. ## algebra

A rectangular parcel of land is 70 ft longer than it is wide. Each diagonal between opposite corners is 130 ft. What are the dimensions of the parcel? The answer is 50 ft by 120 ft, but I don't know how to find the answer

60. ## French - SraJMcGin

Thanks for your help with the last exercises. But Im still sort of confused with the Superlative stuff. For the excercises yesterday. Le film, Inception est le plus interessant au Canada. The teacher corrected this sentence to: Inception est le film le

61. ## CHEMISTRY!!

A student determined the calorimeter constant of the calorimeter. The student added 50.00 mL of cold water to 50.00 mK of heated , distilled water in a styrofoam cup. The initial temp of the cold water was 21,00C and the hot water, 29.15C. The maximum temp

62. ## math

What is three eighths of 32 pieces? And how do i write out the problem to find the answer?

63. ## Chemistry

I totally forgot how to calculate molarity and all my other resources are not helping. Molarity is mol of solute/L of solution So I have 0.1 M of sodium thiosulfate and 0.1 M of hydrochloric acid For a lab I put in 5 drops of sodium thiosulfate and 3 drops

64. ## World History

What point did Parliament make by executing Charles I? A. England should be ruled according to divine right. B. Parliament had the right to choose its own monarch. C. The Cavaliers had won control of England. D. No monarch could claim absolute power in

65. ## Math

If 7 ounces of cola costs \$0.59. How much should 15 pounds cost ?

66. ## Math

use implicit differentiation to find the point where the parabola defined by x^2-2xy+y^2+4x-8y+20=0

67. ## Chemistry

Aluminum and oxygen are mixed together to yield aluminum oxide. If 3.17 g of Al are used, how many g of product can be made? Al+ O2 yields Al2O3

68. ## pre-cal

I have 2 sets of coordinates (1, 410) and (12, 788) and need to calculate the rate of change over time using y=ae^bt. Since I don't have a coordinate at 0, I can't figure out how to calculate my starting value, or a, to solve this.

69. ## Physics

Determine the total resistance of each of the following parallel circuits. A. A parallel circuit with a 20-ohm resistor and a 10-ohm resistor. B. A parallel circuit with two 20-ohm resistors and a 10-ohm resistor. C. A parallel circuit with a 15-ohm light

70. ## Math

In a class of 32 students study Spanish(S) and 20 of the students study French(F).Calculate the number of students who study Spanish(S) but not French(F).

71. ## math

In a class of 32 students, all the students study Spanish(S) and 20 of the students study French(F).Calculate the number of students who study Spanish(S) but not French(F).

72. ## Geometry

JK=2x+1 KL=6x JL=81 K is between J and L. Use the Segment Addition Postulate to solve for the variable

73. ## Math

A utility company charges \$67.65 plus \$1.1917 per therm for gas usage in excess of 50 therms. Last​ winter, one​ homeowner's bill ranged from a low of \$196.35 to a high of \$214.23. Over what range did gas usage vary​ (in therms)?

74. ## Algebra

In a basketball game, Sam scored 34 pts, consisting only of 3 point shots and 2 point shots. He made a total of 15 shots. How many shots of each type did he make?

75. ## language arts

what is the simple predicate or verb of the sentence many stories relate the adventures of Paule Bunyan/

76. ## Language Arts

Identify the indirect object in the following sentence. Mom needs to give us money before we leave. A. mom B. us C. we D. leave I think it' C, am I right?

77. ## Chemistry: gas law

I'm here at a study group with Aaron and while he's stuck on that question, I'm stuck on this one... I think we're gonna take a break but I'd love if someone could help break this down for me. Carbon monoxide, CO, and hydrogen, H , react according to the

78. ## Math 141

A pair of fair 6-sided dice is rolled. What is the probability that a 3 is rolled if it is known that the sum of the numbers landing uppermost is less than or equal to 6?

79. ## Math

state the amplitude, period, frequency, phase shift and vertical shift of each function, Then graph two periods of the function of: 1) y=3 sin(x-pie/4) 2) y=0.25cosx+3

80. ## Physics

A car enters the freeway with a speed of 5 . 6 m/s and accelerates uniformly for 3.6 km in 2.7 min. How fast is the car moving after this time? Answer in units of m / s

81. ## Math (Algebra)

The Problem is that 3 people go to lunch. They decide to share the \$12 bill evenly. How much does each person pay? The Equation is 3x=12 #1. What is the value of x? #2. Solve for x #3. Answer the question.

82. ## statistics

In a carnival game, a player spins a wheel that stops with the pointer on one (and only one) of three colors. The likelihood of the pointer landing on each color is as follows: 65 percent BLUE, 22 percent RED, and 13 percent GREEN. Note: Your answers

83. ## Chemistry

what is the molarity of a solution of the strong base Ca(OH)2 in a solution that has a pH of 10.80?

84. ## FRENCH

1. Est-ce qu'il y a une grande glace dans ta chambre? Oui, il y a une grande glace dans ma chambre. 2. Qui achète tes affaires de toilette? Mon père achète mes affaires de toilette. 3. Est-ce que c'est la course le matin chez toi? Oui, c'est la course

85. ## To SraJMcGin

I'd like to thank you with all my heart for giving me notes on the Prepositions/countries/cities. Thanks a lot. It really helped me =) P.S I had a substitute for French, so she gave us this exercise to do, and I am having a hard time understanding what to

86. ## FRENCH

Habites-tu près d'un lac? Près de la montagne? J'habite près de la montagne.

87. ## FRENCH - *Imperative*

Limperatif. Use the command to indicate what your friends should or should not do. Could you please give me an example of what its asking me to do. For the not. I believe you are supposed to put N' infront of a verb.

88. ## French - Excerise on Passe Compose

Here is another writing prompt which basically focuses on the Passe Compose. Using the irregular verbs --Avoir, Etre. Here are the instructions: You are spending six months in Paris studying at a specific language school. Write your French teacher a letter

89. ## Physics

What is the pressure increase in the fluid in a syringe when a force of 34.5 N is applied to the circular piston of the syringe, which has a diameter of 10.2 mm?

90. ## Earth's Heat Resources

How is the energy that reaches earth's surface returned to space? is is by radiation?

91. ## Chemistry

If 36.00 mL of KMnO4 are required to oxidize 25.00 mL of 0.02932 M NaC2O4 solution, what is the concentration of KMnO4?

92. ## English 9

Write a character description. Choose a person you know well, and identify one of his/ her character traits. Then, chose two or three incidents in which that person revealed that trait. - The first sentence nees to be your topic sentence and use a specific

93. ## algebra

a) What year would be represented by x = 2? 2002 x 1 = 2003 so it would be 3x2=6 b) How much did it cost per gallon of gasoline in the year represented by x=2? .99

94. ## Physics

The equation describing the velocity of the ice falling from the wing as a function of time is v=45(1-(0.804)^t). Determine algebraically the time required, to the nearest tenth of a second, for the ice to reach a velocity of 98% of its terminal velocity

95. ## Physics

For beginner parachutists, the terminal velocity must be less than 5.00 m/s, and the parachutes used have a k-value that is normally distributed with a mean of 2.05/s and a standard deviation of 0.04/s. If the acceleration due to gravity is 9.81 m/s^2,

Is there a web site that helps make sentences with the words that I have?

97. ## writing

what should we do to write a good paragraph?

98. ## Pre-Calculus

I for the life of me cannot seem to figure this out. Anything would help! Find all solutions of the equation. Leave answers in trigonometric form. x^3 + 8i = 0

99. ## Math

There is 1/2 of a candy bar that needs to be divided evenly among 3 children. What fraction of the total candy bar will each child receive?