# Questions Asked onDecember 31, 2012

1. ## Chemistry..

What mass of aluminum is produced by the decomposition of 5.0 kg Al2O3? My answer is 3000 g of Al Do you convert kg to g? 5.0kg---> 5000g???

2. ## geometry

The Polygon Angle-Sum Theorem states the following: The sum of the measures of the angles of an n-gon is ____. (1 point) (n – 1)180o (n – 2)180o 9. What is the measure of one angle in a regular 16-gon? (1 point) 2,520o 202.5o 157.5o 78.75o 10. The

3. ## geometry inequality triangles help if you can

Two sides of an obtuse triangle are 16 and 21. How many possible lengths are there for the third side, if it is a positive integer? i know that in an obtuse triangle a^2+b^2c but i tried plugging in and it wont work so couldyou guys help me? btw merry

4. ## Chemistry..

When sodium chloride reacts with silver nitrate, silver chloride precipitates. What mass of AgCl is produced from 75.0 g AgNO3? My answer: 63.3g AgCl

5. ## maths

THE Perimeter of a triangle is 2004. One Side of a triangle = 21 Times the other. the shortest side is integral length. SOLVE For lengths of the sides of the traingle in every possible case.

6. ## engineering mechanics

A person A is trying to keep his balance while on a sled B that is sliding down an icy incline. Let mA = 78kg and mB = 25 kg be the masses of A and B, respectively. In addition, let the static and kinetic friction coefficients between A and B be μs = 0.4

7. ## physics

A car of mass 1000kg moving with a velocity of 36km/h hits a wall and comes to rest in 5s.find the force and work done by the car on the wall.

8. ## Chemistry 30

How do I complete an ICE table for a solution of nitrous acid, HNO2, one of the acids associated with acid deposition?

9. ## math

Given figure A and Figure B such that ar(A) = 20sq.units and ar( B ) = 20 sq. A. Figure A and B are congruent B. Figure A and B are not congruent C. Figure A and B are similar D.Figure A and B may or may not be congruent

10. ## English

Mr. Smith, my Spanish teacher, is going on vacation. is this correct PUNCTUATION AND GRAMMER

11. ## physics

A loudspeaker has a movable diaphragm (cone) that vibrates back and forth in harmonic motion to produce sound. The displacement of the cone playing a sinusoidal test tone is shown above. Find the following values from the graph. (NOTE: t = 0.03 sec, and

12. ## maths

ANDY HAS TWICE AS MANY MARBLES AS PANDY AND SANDY HAS HALF AS MANY HAS ANDY AND PANDY PUT TOGETHER .ANDY HAS 110 MARBLES WHICH IS 115 MARBLES LESS THAN SANDY.HOW MANY MARBLES EACH OF THEM HAVE

13. ## Math

A sixth-grade class completed a survey about favorite foods. Of the students in the class 2/6 chose hamburgers, and 3/8 chose pizza. What fraction of the class chose either hamburgers or pizza.?

14. ## HELP PLZ MATH

A recent article in the Myrtle Beach Sun Times reported that the mean labor cost to repair a color television is \$90 with a standard deviation of \$22. Monte's TV Sales and Services completed repairs on two sets this morning. The labor cost for the first

15. ## Algebra

Triangle ABC has coordinates A(1, 4); B(3, –2); and C(4, 2). Find the coordinates of the image A'B'C' after a reflection over the x-axis

16. ## Physics

For a certain transverse wave, the distance between two successive maxima is 1.82 meters and eight maxima pass a given point along the direction of travel every 14.2 seconds. Calculate the wave speed. Answer in units of m/s

17. ## physics

A tank holds 2.85 L of oxygen at 22.1 Celsius and 235 atm. (A) how many moles of gas does the tank contain? (B) what is the average kinetic energy per molecule ?

asked by Physics student need help
18. ## Biology

In a lab on lung capacity where lung volumes (Tidal Volume, Expiratory Reserve Volume, Inspiratory Capacity, Inspiratory Reserve Volume, and Vital Capacity) are measured... Why can't you measure the Inspiratory Reserve Volume (IRV) directly? (In the

19. ## Maths

Three circles are placed on a plane in such a way that each circle just touches the other two each having a radius of 10 cm. Area of the region enclosed by them.

20. ## Physics

A truck travels up a hill with a 15◦incline.The truck has a constant speed of 26 m/s. What is the horizontal component of the truck’s velocity? Answer in units of m/s What is the vertical component of the truck’s velocity? Answer in units of m/s

21. ## altitude triangle inequality

hi guys ive be struggling on this problem for a couple of days, so please help if you can Problem:Two altitudes of a triangle have lengths 12 and 14. What is the longest possible length of the third altitude, if it is a positive integer? Thanks in advance

22. ## physics

A pendulum and a mass spring system are both undergoing simple harmonic motion on Earth (use g = 10 N/kg). It is observed that every time the pendulum goes back and forth, the spring has gone up and down 14 times. If the pendulum has a length of 5 meters

23. ## math

danielle plays softball and basketball. however because she like basketball more, she spends 3 times as long playing basketball than she does playing softball. if she spends 18 hours a week playing these sports, how much time does she devote tp playing

24. ## math

The sum of two consecutive numbers is 37. What are they

25. ## music

what was entertainment like during Mozart's time?

26. ## maths

one FOURTH OF A HERD OF CAMELSWAS SEEN IN THE FOREST . TWICE THE SQUARE ROOT OF YHE HERD HAD GONE TO MOUNTAINS AND THE REMAINING15 CAMELS WERE SEEN ON THE BANK OF THE RIVER . FIND THE TOTAL NO. OF CAMELS

27. ## math

i need help with this open-ended you are having so much fun in the kitchen you decide that you want to make your aunt,s favorite dessert to show her special she is to you .you find the recipe on the internet for the recipe white raspberry cheesecake

among factors that influence consumer decision-making, buyers remorse is generally associated with

29. ## english

What is the simple subject and simple predicate in sentence: The smell of cooking is delicious to the hungry campers.

30. ## social studies

by whom was it built the hanging gardens of babylon

31. ## Help math plz

A firm is deciding whether or not to place a product on the market. They envisage three posible market reactions: high demand, moderate demand, and low demand. If demand is strong they expect to sell 200,000 a month of the good; moderate sale levels are

32. ## algebra

3 - __2X-2______ X^2-1 Write the expression as a fraction in simplest form. 3 minus 2x-2 over xsquared minus 1 Can anyone help?

33. ## Algebra

Didnt write my question too good last time so here is what I meant. This is a mixed ezpression written as fraction and then to be put in simplest form. 3/1 minus 2x-2/x^2-1 thank you

34. ## math

1. If m∠BAC = 38° and m∠DEC = 100°, then what is the value of x? Explain and show all work.

35. ## calculus

solve the following exponential equation. exact answers only 1-8x 3x ¨i =e *I know that I did not post this correctly but I do not know how to put the 1-8x above the pie symbol and 3x above the e.

36. ## Math

Random samples were taken over 2 weeks (14 days) of a drink machine and data was collected of each drink sold. The sample mean was 65.2 drinks with a deviation of 8.1 drinks. Construct a 95% confidence interval on the mean number of drinks sold per day.

37. ## algebra 2

find all the zeroes of: x^5-3x^4-24x^3-72x^2-25x+75=0 5x^5-20x^4-40x^3-16x^2-45x+180=0 -3x^5+3x^4+9x^3-7x^2+12x=12 x^3-x^2-13x-13=0 x^3+x^2=15x-15 Thank you for any help...I'm desperate please help :(

38. ## math

7/9 divid 3/6

39. ## math

Sketch the graphs of f(x) = x^2 and g(x) = 2x. Find a number a between 0 and 2 so that when the region between the graphs of f and g for 0

41. ## Physics

If velocity of wave of 0.15m/s and the frequency of 20HZ,what is the wavelength?

42. ## Physics

An arrow is shot at an angle 35◦ with the horizontal. It has a velocity of 47 m/s.The acceleration of gravity is 9.8 m/s^2.What horizontal distance will it travel? Answer in units of m

43. ## history

in the 1920s, literature played a huge roll in people's lives. however, when the great depression struck in 1929, people were unable to purchase literature and books were focused on the downfall of society and how the glitz and glamour of the 1920s

44. ## Calculus

A function has a relative Maximum of (0,0) and a relative minimum of (3,-5). What is the function?

45. ## Trigonometry

1. If tanθ = –√3 , what is the value of cot ? 2. Find the value of 3sec2.4. (Round to the nearest tenth.) 14.if sinθ = -4/5 and tanθ = -4/3, what is

46. ## physics

A horizontal spring mass system is set up to keep time so that it goes from one side to the other in 6 seconds. The mass used in this system is 0.69 kg. The distance from one side to the other is 2.4 m. What spring constant should be used if it is to

47. ## math

4^2(4squared)>or=-2(x-5) 16>or=-2x+10 -10 to both sides 6>or=-2x 6/-2>or=-2x/-2 -3

48. ## Algebra

Didnt write my question too good last time so here is what I meant. This is a mixed ezpression written as fraction and then to be put in simplest form. 3/1 minus 2x-2/x^2-1 thank you

49. ## Physics

A 68.5kg man is standing still on an elevator that isn't moving, what is the normal force on him?

50. ## American Givernment

Help me create a mnemonic for and about special interest groups.

51. ## math

what is the % difference between 288 to 404

52. ## calculus

Find the inverse the following function. Find the domain, range, and asymptotes of each. f(x)=In(x+1)+1 Please show work

53. ## english

What is the simple subject and simple predicate in the sentence: A good fire is difficult to build.

54. ## Medical coding 2

Unknown causes of morbidity or mortality should be coded only when?

55. ## algebra 2

identify the vertex, axis of symmetry and the dirction of opening for y=-(x-6)^2-5

56. ## chemistry

How many grams of NH2OH are needed to prepare 250mL of a solution with a pH of 9.56? kb=6.6x10^-9

57. ## Physics

A 68.5kg man is standing still on an elevator that isn't moving, what is the normal force on him?

58. ## math

2. manielle and ross were playing in the dirt and each found a caterpillar. they decided to race them, giving minelle's caterpillar a 2.5 foot head start from the starting line while ross' caterpillar began at the starting line. minelle's caterpillar

59. ## Medical coding 2

Can someone tell me the answer for part I I trauma and poisoning coding exercise 5.100

60. ## maths

a pair of dice is thrown ...find the probability of getting 7 as the sum if it is knwn that second die is always exihibts a prime number

61. ## math

i need help with this open-ended you are having so much fun in the kitchen you decide that you want to make your aunt,s favorite dessert to show her special she is to you .you find the recipe on the internet for the recipe white raspberry cheesecake

62. ## math

show 7 two different ways

63. ## Science

What is science?

64. ## maths

what is the number of different 10 digit telephone number made from digits 0-9?

65. ## maths

a right angled triangle has legs a,b (a is greater than b).the right angle is bisected splitting the original triangle into 2 smaller triangles.Find the dist btw. the orthocentres of the smaller triangles.