# Questions Asked onMarch 20, 2018

1. ## math

Find the angles of the rhombus if the ratio of the angles formed by the diagonals and the sides is 4:5.

2. ## physics

A block with mass m = 17 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4201 N/m after being compressed a distance x1 = 0.556 m from the spring’s unstretched length. The floor is frictionless except for a rough

3. ## Math 201

I am having problems with this question in my math class. Consider a student loan of ​\$25,000.00 at a fixed APR of 12% for 25 years. a. Calculate the monthly payment. The monthly payment is \$263.31 b. Determine the total amount paid over the term of the

4. ## physics

10. A 3 kg block moves up a 40° incline with constant speed under the action of a 26N force acting up and parallel to the incline. What magnitude force must act up and parallel to the incline for the block to move down the incline at constant velocity?

5. ## Math:)

Explain why sin^-1[sin(3pi/4)] does not = 3pi/4 when y=sin(x) and y=sin^-1(x) are inverses. Any help on this question is greatly appreciated. Thank you!

6. ## Math

The formula S=6a^2 can be used to find the surface area of a cube. if S=6cm^2, what is the side length,a, of each face 1cm 2cm 1/6cm 3cm

7. ## physics

A block with mass m = 17 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4201 N/m after being compressed a distance x1 = 0.556 m from the spring’s unstretched length. The floor is frictionless except for a rough

8. ## Calculus

A uniform layer of ice covers a spherical​ water-storage tank. As the ice​ melts, the volume V of ice decreases at a rate that varies directly as the surface area A. Show that the outside radius decreases at a constant rate.

9. ## Chemistry

A water chemist obtained a 250 ml sample from a nearby lake and fixed the oxygen on-site with alkaline solutions of MnSO4 and KI-NAN3. Returning to the laboratory, a 200 ml sample was analyzed by acidifying the sample with conc H2SO4 and then titrating

10. ## Chemistry

1.If a solution absorbed violet light, what color would the solution appear to be? ________________ Calculate the concentration of a solution prepared by adding 15.00 mL of 2.00×10^−3 M KMnO4 from a buret into a 50.00 mL volumetric flask, which is then

31/2 + 11/2=

12. ## Math:)

Which trigonometric functions are equivalent to tan(theta)? Select all that apply. (2 answers) a. -tan(-theta)**** b. -tan(theta) c. tan(-theta) d. tan(theta+2pi)**** e. tan(theta+pi/2)

13. ## music

the romantic period of music was known for? A. vibrant and unexpected key changes B. little use of dynamic changes. C. few notable composers D. minimal sense of storytelling I need help with all the questions

14. ## Math:)

Which functions have the same transformations as f(x)=2csc(x-1)-3? Select all that apply. (2 answers) a. f(x)=2(x-1)^2-3*** b. f(x)=[2(x-1)]/[x-3] c. f(x)=2sin(x-3)*** d. f(x)=2e^(x-1)-3 e. (x-1)^2+(y-3)^2=2

15. ## Chemistry

For the reaction 2HI=H2+I2.one mole of HI is introduced into a vessel at constant temperature.calculate the no of moles of I2 when equilibrium is reached (Kc=0.0156) Plz help me and give complete solution

16. ## World History

What was the function of high culture in Classical Athens?

17. ## 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 19.7 cm to the left of the diverging

18. ## physics

Two objects are placed on the edge of a circle. They move in opposite directions from the same starting point in order to collide with each other. The first object moves at 0.1 rad/s, and the second moves at 0.25 rad/s. If both objects have the same

19. ## Math

Write an expression to describe a rule for the sequence. Then find the 100th term in the sequence. 5, 13, 21, 29, 37, 45 1)8n;800 2)8n-3;797 3)3n-8;292 4)5+8n;805 I think #4 is correct. Thank you.

20. ## Math:)

The data in the table represents the average number of daylight ours each month in Springfield in 2015, rounded to the nearest quarter-hour. Jan~9.5 hrs Feb~10.5 hrs Mar~12 hrs Apr~13.25 hrs May~14.5 hrs Jun~15 hrs Jul~14.75 hrs Aug~13.75 hrs Sep~12.5 hrs

21. ## History

“...[The] said Cooper Hughs Freedman with his wife...are to work on said farm and to cultivate forty acres in corn and twenty acres in cotton, to assist in putting the fences on said farm in good order and to keep them so and to do all other work on said

22. ## Chemistry

The interaction energy between an ion pair diminishes with separation distance r as a function of 1/r, whereas the interaction energy between two rotating dipoles diminishes as 1/r6. This means that ion-ion interactions are much longer range than

23. ## CHEMISTRY

1× SDS Running Buffer For this exercise, you will need to prepare 1 L of 1x SDS Running Buffer. The final composition of this buffer is: 25 mM Tris, 200 mM Glycine pH 8.3, 0.1% (w/v) SDS 1. To a 1 L beaker, add 500 ml of distilled water. Place a magnetic

24. ## maths

What time will a runner take to run a distance of 8 km at a speed of 15 km/hr?

25. ## chemistry

6NH3 + 2H2BO3-3N2H4 + 2B+ 4H2O+ 2OH- name of the element oxidized:? name of the element reduced:? formula of the oxidizing agent:? formula of the reducing agent:? 3N2H4 + 2ClO3-3N2 + 2Cl-+ 6H2O name of the element oxidized:? name of the element reduced:?

26. ## science

a 3300 mf capacitor recquired to store 0.5mj of the energy.find the potential difference to which the capacitor must be charged?

27. ## Physics

A sample of 8.02×10^−1 moles of nitrogen gas (γ =1 .40) occupies a volume of 2.00×10^−2 m^3 at a pressure of 1.00×10^5 Pa and temperature of 300K. The sample is isothermally compressed to exactly half its original volume. Nitrogen behaves as an

28. ## Science

What is a transport system in plants

29. ## Math

The coordinates of three vertices of a certain parallelogram are (5,2), 2,6) and (10,9). Give the coordinates of a fourth vertex. Then give the coordinates of another point that could be the fourth vertex.

30. ## Social studies

how did the mayflower compact set a precedent for democratic government in North America? A) the mayflower compact recognize in a stab Lish that people had the power to govern. B) The Mayflower compact set up a religious monarchy with loyalty to King

31. ## IPC

the planet mars is located 228 million kilometers (2.28x10^11m) away from the sun. if it takes the sun 760 seconds to reach mars how fast is light travelling???

32. ## music

I can’t get back to the page but thank you Ms. Sue. I went back and found each answer individually and wrote them down. hopefully you can forgive me.

33. ## history

In this discussion, you will discuss the ways in which the United States fought pool cold war economically, common, socially, and politically, and which message you believed were the most effective in combating communism

34. ## Math:)

1. Evaluate tan[sin^-1(a)]. a. [sqrt(1-a^2)]/1-a^2 b. [sqrt(1-a^2)]/a c. sqrt(1-a^2) d. {a[sqrt(1-a^2)]}/1-a^2 I do not know the steps to find this answer and am not provided with a textbook. I have researched online some what, but I cannot seem to

35. ## Algebra

How many small triangles are in a triangular grid that has 20 units on a side. Please show me a formula to figure it out . Thanks

36. ## mathj

a box contains ten `pairs of shoes if four shoes are retired there are numeration (1 I) (2 I) (10 I) X is the set formed by 20 numbers Find the triplet Calculate probability P(Ai)

37. ## Algebra

Evaluate these expressions N=4 N=-3 N=10

38. ## Science

If a bird at sea level requires a speed of 30 mph to have enough lift to fly, how fast must it fly for the same lift at 20,000 ft?

39. ## ss

Provide 3 details on how the farming revolution helped civilizations develop. plz i need help on knowing what to write!

40. ## science

Calculate the density of the wood?

41. ## ALGEBRA 1!!!! PLS HELP!!!!

Ike's piggy bank contained only quarters and nickles. When he counted the money there was \$21.65. If there were 121 more nickles than quarters, how many of each type of coin did Ike have in the bank?

42. ## Tech

Okay, so I don't have Microsoft Word for mac, but my school usually uses word documents. I can access them, but I can't read comments or anything else. Please help?

43. ## English

1. Mom jumps from the sound. 2. Mom jumps because of the sound. 3. Mom jumps _____ the sound. [ Does #1 mean #2? What is the meaing of 'from' in Sentence 1? What else can we use instead of 'from' in #3?]

44. ## ALGEBRA 1!!!! PLS HELP!!!!

When Julia dumped out the big jar of dimes and nickles she found 287 coins. If there was \$20.50 in the jar, how many of each kind of coin was there??

45. ## ED tech

i need to know how technology has impacted police officers.

46. ## Math:)

A weight is attached to a spring that is oscillating up and down. it takes 3 sec. for the spring to complete one cycle, and the distance from the highest to lowest point is 4 in. What equation models the position of the weight at time t seconds? a.

47. ## chemistry

Calculate the concentration of a solution prepared by adding 15.00 mL of 1.92E−3M KMnO4 from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation mark with distilled water.

48. ## Math

Subtraction with renaming Am very confused. Am trying to teach my little brother but am getting everything wrong. I have the right answer but the work does not add up to that. 6 - 3 2/5 I got 3 2/5 but the answer is 2 3/5 I donâ€™t understand can you

49. ## Chemistry

Calcium chloride contains calcium and chloride ions. Write the ground-state electron configuration for the calcium ion.

50. ## Math

When Julia dumped out the big jar of dimes and nickles she found 287 coins. If there was \$20.50 in the jar, how many of each kind of coin was there??

51. ## Social studies

When did the Romans take over Italy? A: By 500 BC B: By 267 BC C: 125 BC D: By 100 AD

52. ## physics

A wheel has an angular speed of 85 rev/s when it experiences a constant angular acceleration of 100 rev/s2 which causes it to spin FASTER. During this time the wheel completes 26 rev. Determine how long the wheel was experiencing this angular acceleration.

53. ## science

Which motion causes night and day on Earth? A. the Sun’s motion around its axis B. Earth’s motion around its axis*** C. Earth’s motion around the Sun D. the Moon’s motion around Earth I think the answer is B, but am I correct?

54. ## Chemistry

What is the slope of the standard curve? Absorbance Concentration (M) 0.330 6.00 x 10-4 0.264 4.80 x 10-4 0.198 3.60 x 10-4 0.132 2.40 x 10-4 0.0660 1.2 x 10-4 What is the slope of the standard curve?

56. ## daily geography

Denmark, Norway, Sweden , Finland, And Iceland compromise an area called____? Is the correct answer Scandinavia or Nordic countries? I have seen both and I'm not sure which is correct.

57. ## Differential Equations

We have a question: X'={{1,0,0} {-4,1,0} {3,6,2}}X; X(0)={-1,2,-30} I have worked out to the general solution but I don't think it's right. I have: X=C1 {0,0,1}e^2t + C2 {0,-1,6} e^t + C3 [{0,-2,6} + {0,-1,6}t] e^t this gives me x(t)=0....

58. ## fine art

Name the first established female artist and tell at what point she became recognized. I'm confused on this question. I don't know whether it would be Judith Leyster or Sofonisba Anguissola. My textbook doesn't say exactly and I can't find it when I google

59. ## Tx History

1. How did ranchers show ownership of the cattle? * 1 point They would put them in a pen near their home. They would brand them. They would tie them up and keep them nearby*** They would fence them in on their property. 2. The growth of the railroads

60. ## Chemistry

Estimate the dipole moment, in Debye units, of the HI molecule based on difference in Pauling electronegativity between the atoms.

61. ## statistics

A population has an average of 150,000 with a standard deviation of 27,000. A random sample of 81 items is chosen. What is the standard error?

62. ## chemistry

when iron III oxide reacts with vinegar? Is either of the materials reduced or oxidized? Vinegar is not oxidized or reduced right ? Because it still has an oxidation state of negative 1? The only thing that is reduced is Fe because it now has an oxidation

63. ## Math

From a point A, the angle of elevation to the top of a building is 50°. From point B which is 11 m closer to the building the angle of elevation to the top is 63°. How far is point B from the top of the building? How tall is the building?

64. ## Calculus

Use left and right endpoints and the given number of rectangles to find two approximations of the area of the region between the graph of the function and the x-axis over the given interval. g(x) = 2x^2 − x − 1, [3, 5], 4 rectangles __ < Area < __

65. ## Science

0.005 mol of non-electrolyte was dissolved in 50g of benzene. Calculate depression of a freezing point of this solution

66. ## Social Studies

Compare the U.S. response to Soviet actions in Afghanistan with the U.S. response to Soviet actions in Poland. A. The United States condemned Soviet policy towards both countries. B. The United States adopted a policy of detente in both countries C. The

67. ## Math

There are 5 chaperones for every 14 kids on a field trip. If there are 152 people on the trip, how many of them are adults?

68. ## Physics

A missle is fired with a launch velocity of 4600 m/s at a target 1932 km away, at what angle must it be fired to hit the target? How long the missle is in the air before hitting the target?

69. ## English

1. Less than 5,000 people live here. [Does 'less than 5,000' include '5,000'?] 2. More than 5,000 people live here. [In math, does 'more than 5,000' include '5,000'?]

70. ## math

Each ticket to a school dance is \$4. The total amount collected in ticket sales is \$332. Write and solve an equation to find the number of students attending the dance.

71. ## Physics

A sealed container of volume V =0 .10m^3 holds a sample of N =3 .0×10^24 atoms of helium gas in equilibrium. The distribution of speeds of the helium atoms shows a peak at 1.1×10^3 ms^−1. (i) Calculate the temperature and pressure of the helium gas.

72. ## math

A hurricane has wind speeds that are greater than or equal to 74 miles per hour. Write an inequality to represent the possible wind speeds during a hurricane.

73. ## math

One third of the viewers at a movie opening rated the movie as Good or Very Good. Thirty-five people rated it Good and twenty people rated it Very Good. Write and solve an equation to find the number of people p in the audience.

74. ## physics

Did I do a) and b) right? The three blocks shown are released from rest and are observed to move with accelerations that have a magnitude of 1.5 m/s2. Disregard any pulley mass or friction in the pulley and let M = 2 kg. a) What is the magnitude of the

75. ## chem

If the heat of combustion for a specific compound is -1160.0 kJ/mol and its molar mass is 90.75 g/mol, how many grams of this compound must you burn to release 823.00 kJ of heat?

76. ## chem

A researcher studying the nutritional value of a new candy places a 3.50-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.23 °C. If the heat capacity of the calorimeter is 31.30

77. ## R M E

Discuss 5 ways we can teach religious and moral education to avoid indoctrination