# Questions Asked onDecember 10, 2016

1. ## Pre-Algebra

The width of a picture is 20 cm. Using a color copier, you reduce the width of the picture to 5 cm. What is the scale factor of the dilation? A)5 B)1/5 C)4 D)1/4*****

2. ## Chemistry

For the reaction Ag2S(s) ⇌ 2 Ag+ (aq) + S2- (aq), what happens to the equilibrium position if ammonium sulfate is added? A) doubles B) shifts to the left C) does nothing D) shifts to the right E) halves

3. ## Maths

Mona's father is thrice as Mona after 12 years his age is just twice of his daughter find their present age?

A test was given to a group of students. The grades and gender are summarized below A B C Total Male 7 14 11 32 Female 15 13 16 44 Total 22 27 27 76 If one student is chosen at random from those who took the test, Find the probability that the student was

5. ## college statistic

A study was done on skull sizes of humans during different time periods. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed​ populations, and do not assume that the

6. ## Chemistry

Identify the equation for which Keq = [Cu+]2[S2-]. A) CuS(s) ⇌ Cu2+(aq) + S2- (aq) B) 1/2Cu2S(s) ⇌ Cu+(aq) + 1/2 S2- (aq) C) Cu2S(s) ⇌ 2Cu+(aq) + S2- (aq) D) Cu2S(s) ⇌ Cu+(aq) + 2 S2- (aq) E) none of the answers

7. ## Functions - math

The function f is such that f(x) = 2x + 3 for x ≥ 0. The function g is such that g(x)= ax^2 + b for x ≤ q, where a, b and q are constants. The function fg is such that fg(x)= 6x^2 − 21 for x ≤ q. i)Find the values of a and b ii) Find the

8. ## Chemistry

Which of the following is TRUE for a system that is in dynamic equilibrium? A) The forward reaction goes to 100% completion. B) The concentration of products is equal to the concentration of the reactants. C) The reaction rate of the forward reaction

9. ## language arts

Could you check my answer please..thank you Which of the following sentences contains a linking verb? A. Yesterday, Sarah experienced rock climbing for the first time.xxx B. Sarah seemed nervous at first. C. She climbed very well for a beginner. D. I think

10. ## Maths

a chord of radius 20cm subtends an angle of 90 degrees at centre. find the area of the corresponding major segment of the circle

11. ## algebra

The base of a triangle is 3 inches less than twice its height If the area of the triangle is 126 square inches what equation can be used to find h the height of the triangle in inches

12. ## Chemistry

for any solute what important condition must be stated in order to report the solubility answer

13. ## Algebra

A watermelon is dropped from the top of a building The height of the watermelon above the sidewalk is given by h(t)=-16t^2+240 with t representing number of seconds How many seconds does it take for the watermelon to hit the sidewalk

14. ## chemistry

The edge of a body-centered -cubic unit cell (which contains two atoms per unit cell) of an element Y was found to be 3.16x10^-8cm.The density of the metalis 19.35g*cm^-3. What is the approximate molar mass of Y?

15. ## Geometry

1. The lengths of two sides of a triangle are 9 and 15. What's can be said about the length of the third side? A. It must be greater than or equal to 6 and less than 24. B. It must be greater than or equal to 6 and at most 24. C. It must be greater than 6

16. ## geometry

A rectangular prism has a length of 4.2 cm, a width of 5.8 cm, and a height of 9.6 cm. A similar prism has a length of 14.7 cm, a width of 20.3 cm, and a height of 33.6 cm. The dimensions of the smaller prism are each multiplied by what factor to produce

17. ## mathematics

A salesperson set a goal to earn \$2,500 in August. She receives a base salary of \$1,000 per month as well as a 20% commission for all sales in that month. How many dollars of merchandise will she have to sell to meet her goal? answer:7500

18. ## Science

The Northern Hemisphere recives more solar energy during one half of the year than it does during the other half of the year. Which of the following happens during the year to explain this? A - the distance of the northern hemisphere from the sun changes B

19. ## Government

The president is the author of the nation's public policies in his or her role of A commander in chief B chief legislator C chief of party D chief citizen

20. ## MATH

the line 'l' has gradient 3 and cuts the x-axis at 4 then its equation?

21. ## ENGLISH

Mark the stressed syllables in the following sentences 1. can i see you today? 2. it's impoossible to please everybody. 3. The light's wrong for photography. 4. My mind went blank and everything blacked out. 5. Please bring me a chair

22. ## maths probability

a spinner is marked green yellow red and blue. neel conducted an experiment spinning the spinner several times

23. ## Math

My sister is 8 years older than I am. The sum of our ages is 26. Find our ages

24. ## Math

If the demand function of the monopolist is {p=200-0.5x} and its cost function is {C=100+5x+7x^2}. Value of 'x' , price and the amount of profit for which profit maximizes are:

25. ## physics

The coefficient of kinetic friction for wood on wood is o.55. The coefficient of kinetic friction for wood on wood is 0.68. For a 3.5kg wood block being pulled horizontally: a. what is the pull force needed to start the wood block moving on a wood floor?

26. ## Science

Which statement best describes a spring tide? A - The periodic rise and fall of the water level in the oceans B - the tide if maximum range that takes place two times a month C - the difference in levels of ocean water at high tide and at low tide D - a

27. ## Algebra2

Name the property of real numbers for -2(x+4)=-2x-8 associative property of multiplication communitive property of addition distributive property associate property of addition my answer is distributive property

28. ## Anatomy and Physiology

1. Simple sugars are (1 point) lipids. monosaccharides. polysaccharides. minerals. 2. Which of the following statements is not true about the immune system? (1 point) In children, lymphatic tissues such as adenoids, tonsils, and lymph nodes enlarge as

29. ## Science

Cassie is writing an equation to show the effect of gravitational pull of the sun and moon on tidal range which equation would Cassie use to show the effect of the sun and the moon on Spring tides? A - sun + moon = spring tides B - sun + Earth = spring

30. ## Calculus

A trough is 15 ft long and 4 ft across the top. Its ends are isosceles triangles with height 3 ft. Water runs into the trough at the rate of 2.5 ft3/min. How fast is the water level rising when it is 0.89 ft deep? Give your answer correct to 3 decimal

31. ## Algebra

The sum of 3 integers is 194. the sum of the first and second integers exceeds the third by 80. The third integer is 45 less than the first. Find the three integers

32. ## Science

Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically

33. ## Probability

How many combinations are there of six distinct objects taken three at a time?

34. ## Algebra

In the mall you receive a coupon for 5 dollars off a pair of jeans. When you arrive at the store you find that all jeans are 25 percent off Let x represent the original cost of the jeans 18a.Write a function F(x) that represents the effect of your original

35. ## Algebra

Can you please help on this Algebra problem? Keana's piggy bank contains \$4.30 in nickels and dimes only. If she has 59 coins in her ban, then what is the sum of the digits in the number of nickels in Keana's bank? Write a system of equations for this

36. ## optional maths

The vertices of triangle PQR are P(2,5),Q(6,1)and R(-2,-1).Find the length of the longest median.

37. ## language arts

Could you check my answer please..thank you Which of the following sentences contain a linking verb? A. Teresa wore her favorite shoes today. B. Her shoes look really comfortable.xxx C. She put them on with striped socks. Teresa walked for hours without a

38. ## chemistry

Industrial waste contains Zn(II) and cyanide. The waste is toxic to aquatic species like fish. 1- If the waste consists of water, Zn(II) and cyanide, what ligands might complex with Zn(II)? 2- Write chemical equilibria reactions the must be considered to

39. ## CHEMISTRY

what volume of hydrogen is produced with excess HCL according to the equation Zn+2HCL-ZnCL2+H2

40. ## Chemistry

Consider two equally sized balloons at room temperature, one filled with oxygen gas and one filled with an unknown gas. If the balloon filled with oxygen gas deflates in 37 hours and the other balloon deflates in 26 hours, which of the following is the

41. ## Algebra

x^2-12x=-36 I got x=-6

42. ## Math (Polynomials)

What are the coefficients in the polynomial 4x^2+3x-3? A. 4,-3, -3 B. 4, 3 C. 4, 3, 3 D. -4, 3 I'm not sure how to do this can someone explain?

43. ## h.p.

if a,b,c, are in h.p. prove that a^2+c^2> 2b^2 ? answer= 1/a,1/b, and 1/c are in h.p. =1/b-1/a=1/c-1/b =1/b+1/b=1/c+1/a =b+b/b^2=a+c/ac =2/b^2=a+c/ac =b^2(a+c)=2ac =(a+c)ac=2b^2 =a^2+b^2 >2b^2

44. ## Algebra

The ratio of girls to boys in the robotics class is 3 to 4. If there are 27 girls in the club, how many members does the club have in total?

45. ## triangles

In triangle ABC, AB = 12, AC= 9, D is a point on AC, AD = 3. E is a point on AB, so that triangle ADE is similar to ABC, what is the length of AE? (two different answers)

46. ## Algebra

Can you please help me with this problem: The x-intercept of a line has a value of -7/6 and a y-intercept of 7. Another line has a slope that is twice the slope of the first line an a y-intercept that is 15 more than the first lines' y-intercept. What is

47. ## statistics

Janet has a jar with 8 gold marbles 12 silver marbles and 4 bronze marbles is she chooses two marbles without replacement, what is the probability that she chooses two silver marbles. I think the answer is 11/46 but not sure how to work the prboem

48. ## tribal government

if the tribal government don't recognize judicial board does separation of powers still work

49. ## Math.

two concentric circle with the ratio of radii as 2:3, what is the ratio of the circumferences

50. ## math

The perimeter of two square are 428cm 396cm. Find the area of a square.

51. ## Math

1. For a particular year, a company has gross annual income of \$780,000, annual expenses of \$270,000, and allowed depreciation of \$60,000. The company is located in a state where the first \$200,000 corporate income is tax-free, and any income above that is

52. ## Algebra

a ball is dropped from a 50 meter cliff and its height h above the ground at any time ti is given by thte equation h(t)=50-4.9t^2

53. ## Probability

What is the probability of an event E in a uniform sample space S?

54. ## calculus

The marginal cost is given by C'(x)=x^(1/3)+9. If the fixed costs are ​\$175​, find the cost of producing 8 units. thank you!!

55. ## math

-The following data give the 2010 gross domestic product (in billions of dollars) for all 50 states. (Source: Bureau of Economic Analysis). 173 49 254 103 1901 258 237 62 748 403 67 55 625 276 143 127 163 219 52 295 379 384 270 97 244 36 90 126 60 487 80

56. ## math

equation of a straight line perpendicular to x-axis passing through the point (3,-1)

57. ## Algebra

|1-4k| ≥ -11 Solve

58. ## Algebra

A projectile is launchedf rom ground level and its height can be modeled as functions of time by the equation h=40t-5t^2 What are the reasonable domain and range of this problem situation

59. ## Algebra

A ball is dropped from a 50 meter cliff and its height, h is above the ground at any time, t is given the equation h(t)=50-4.9t^2 How long is the ball in the air before it hits the ground

60. ## science

How many grams of sodium hydroxide is required to neutralize 73 grams of hydrochloric acid and to from sodium chloride and water

61. ## Chemistry

Hi , I have this question and I do not know what steps to follow. Please help guide me. It will be really appreciated. Calculate the extent of oxidation in a stream where water it's in equilibrium with atmospheric oxygen and had a pH pic 6.5 (a(H3O+)

62. ## Algebra

Please help me with this Algebra problem: The length of a rectangle is 91 less than six times the width of the rectangle. If the perimeter of the rectangle is 84 centimeters, what is the length of the rectangle? Write a system of equations for this

63. ## Calculus III

Hi, this question is about Langrange multipliers. Given f(x,y) = y^2 - x^2, subject to the constraint g(x,y) = 0.25x^2 + y^2 = 1, find the max and mins. So I found the partial derivatives for both f(x,y) and g(x,y): fx = -2x fy = 2y gx = 0.5x gy = 2y And

64. ## math

F(x,y) represents a velocity field of a fluid over a surface z=6-3x-2y.If the magnitude of the velocity in the direction of the unit normal vector,n on S is 3z/(surds14), compute the flux of F(x,y) over the surface S in the first octant oriented upward

65. ## Math (calculus) (mean values)

A company introduces a new product for which the number of units sold Ss given by the equation below, where t is the time in months. s(t) = 155(7-(9/(2+t))) a) Find he average rate of change of s(t) during the first year. I got the answer to be 1395/28 b)

66. ## Kumar

What is number?

67. ## Algebra

Can you PLEASE help me with this Algebra problem: In a hotel conference room, the number of chairs is 47 more than the number of people currently in the room. The total number of legs currently in this room is 938. What is the sum of the digits in the

68. ## Chemistry

Calculate partial pressure given ka1, pH and KH The equation given in the question was: HCO3-(aq)+H3O+(aq)= CO2(aq)+H2O Calculate the partial pressure of CO2. I think you use : [H3O+] = ka1x(antilog pH)/(antilog pH) Then Henrys law: Equilibrium

69. ## Chemistry

a+bc (fast) c+d->e (slow) e->f+b (fast) How do you determine the overall equation for these reaction mechanisms?

70. ## chemistry

how many grams of sodium hydroxide is required to neutralize 73grams of hydrochloric acid and to form sodium chloride and water

71. ## Business Math ( Future ordinary Annuities)

Howard has deposited RM1000 at the end of each month into a retirement savings plan for the last 10 years in his working life. His deposits earned an interest rate of 2.5% per month for the first 4 years and 3% per month for the rest of the years. What is

72. ## Physics

A non-homogeneous trunk, 5 meters long and 100 kilograms mass is in equilibrium and is hung at the ends by two strings; One form an angle of 37 degrees and the other an angle of 53 degrees, both with the horizontal. Determine the location of the center of

73. ## Chemistry

Write a chemical equation for 48g of gasoeous hydrogen and 320g of gaseous oxygen yield

74. ## Math Help

Explain what is meant by an experiment. Give an example. For the example you have chosen, describe (a) a sample point, (b) the sample space, and (c) an event of the experiment.

What is the abbreviation for disks that can be erased and reused

76. ## Math

Hot air balloons If the hot air balloon shown is in the shape of a spehere, what is it's radius? Hint: v=15,000 cubic feet.

77. ## Algebra

Can you please help with this problem: At Super Saver Mart (SSM), you can buy three packs of toilet paper and seven boxes of cereal for \$46.00. You can also purchase 8 packs of toilet paper and 4 boxes of cereal for \$75.00 at SSM. What is \$14 more than the

78. ## Algebra

a projectile is laucnhed from the ground level and its height can be modeled as a function of time by the equation h=4-t-50t^2 What are the reasonable domain and range of this problem

79. ## Chemistry

I just need someone to check my answers please :) On the pH scale are the following items base, neutral, or acid? 1. Hand Soap 2. Blood 3. Milk 4. Coffee 5. Orange Juice 6. Soda Pop 7. Vomit 8. Battery Acid My answers: 1. Base 2. Neutral 3. Neutral 4.

80. ## chemistry

The edge of a body-centered-cubic unit cell ( which contains two atoms per unit cell) of an element Y was found to be 2.16x10^-8cm. The density of the metal is 19.35g*cm^-3. What is the approximate molar mass of Y?

81. ## Geoemtry

I am given two triangles One triangle has side length of 4 and 2x+7 The other one has side length of x and 1. How do I find the lengths of the sides of these two similiar triangles

82. ## Math

Find the compound interest on rs 64,000 for 1 year at the rate of 10% per anum compounded quarterly. Could you please do it fast I need to give it tomorrow.

83. ## Kumar

What is the life of earth ? explain and why?

84. ## Physics

Is screw a modified inclined plane?

85. ## science

Na2Co3 has a mass of 2.25 grams determine the Na ions present

2+5s-4

87. ## Math

Let A and B be sets. Below are listed several statements involving set notation. For each case, write a statement in words that says what is written in symbols. a. A U B b. A ∩ B c. A ⊆ B d. a ∈ A e. A ∩ B = Ø

88. ## math

F(x,y) represents a velocity field of a fluid over a surface z=6-3x-2y.If the magnitude of the velocity in the direction of the unit normal vector,n on S is 3z/(surds14), compute the flux of F(x,y) over the surface S in the first octant oriented upward

89. ## math

two concentric circle with the ratio of radii as 2:3, what is the ratio of the area? thanks

90. ## Geography

How was the earth formed?

91. ## algebra word problem

One year, Shannon made \$288 from two investments. \$1100 was invested at one yearly rate and 1800 at a rate that was higher. Find the two rates of interest.

92. ## Math

A taxi charges \$6+\$0.20 every 1/8 of a mile.How many miles can you go on \$14.00.

93. ## Algebra

Solve algebraically x^2-6x+9>0

94. ## Algebra

Find the multiplied standard form of the quadratic ax+2+bx+c=0

95. ## General

What can you say about the situation of science?

96. ## Ratan

What means society?

list of companies that uses decision making process?

98. ## V.i.p. Maths

Why the value of 'pi' is taken as 22/7

99. ## Commerce

What is accountancy?

9|r-2|-10

101. ## Math

Does there exist a fraction(s) m/n for which it is true that m/n= (m+b)/(n+b) ? If so, for which fraction(s). If not, explain why. Remember, if you say that such a fraction does exist, simply offering one example will not suffice as a full justification.