# Questions Asked onDecember 3, 2017

1. ## Chemistry

A solution contains 2.2×10−4 M Ag+ and 1.3×10−3 M If NaI is added, will AgI(Ksp=8.3×10−17) or PbI2(Ksp=7.9×10−9) precipitate first? I know the answer to this is AgI Specify the concentration of I− needed to begin precipitation.

2. ## algebra 1

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

3. ## Math

Compare the graphs of the logarithmic functions f(x)= log(7)x and g(x) = log(4)x. For what values of x is f=g, f>g, and fg, but what is f

4. ## geometry

Given: ΔАВС, m∠ACB = 90° CD⊥AB,m∠ACD =60° BC = 6 cm. Find: АD

5. ## Math (PROBABILITY)

Elizabeth wants to use a standard number cube to do a simulation for a scenario that involves three equal outcomes. What is one way in which she can do this?

6. ## Math

If the probability of an event happening is p, what is an algebraic expression that represents the probability that the event does not happen?

7. ## Economics

which of the following changes in trade would produce the greatest increase in gdp? increase exportsm& increase imports increase exports & decrease imports decrease exports & increase imports decrease exports & decrease imports my answer is the 2nd one

8. ## SCIENCE

AN AIRPLANE TRAVELS 290 KM BETWEEN AUSTIN AND DALLAS IN 1 HOURS 15 MIN.WHAT IS ITS AVERAGE SPEED?

9. ## math

In ΔABC,AD and BE are the angle bisectors of ∠A and ∠B and DE║ AB.If m∠ADE is with 34° smaller than m∠CAB,find the measures of the angles of ΔADE.

10. ## Math

The soccer team is selling key chains to raise money for the team. They ordered 100 key chains that sell for .25 each. There is a flat shipping rate of \$8. The team sells the key chains for \$2 each. With that information, I figured they made \$33.00 selling

11. ## physics

A cyclist in an Olympic race is moving in a circular track of radius 80 m with speed 72 km/h. He has to lean from the vertical approximately through an angle of... ANS: tan-1(1/2) How is tan-1(1/2) derived in this answer?

12. ## Math

The side of a square flower bed is 1 m and 80 cm long. It is enlarged by digging a strip 20 cm wide all around it. find the area of the flower bed and also the increase in area of the flower bed answer me.

13. ## algebra

OLD MCDONALD IS GOING TO PUT A PIG PEN UP AGAINST HIS BARN. HE HAS 45 FEET OF FENCING AND WILL ONLY NEED TO MAKE 3 ADDITIONAL SIDES, AS THE BARN ACTS AS THE FOURTH SIDE.. WHAT IS THE MAXIMUM AREA THAT THE PIG PEN CAN HAVE.

14. ## Chemistry

If 0.370 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

15. ## Math

An object is thrown upward from the top of a 160-foot building with an initial velocity of 144 feet per second. The height, h, of the object after t seconds is given by the equation h=-16t^2+144t+160. When will the object hit the ground? The object will

16. ## math

Could you explain this? ("Dumb it down for me") So far I know that 2^2 x 3 x 5^4 x 8 x 11^2 is equal to 4 x 3 x 625 x 8 x 121. (I think) ========================================== A number is written with the following factorization: 2^2 × 3 × 5^4 × 8

17. ## Algebra I

11. The equation T = 0.63s + 78 can be used to determine T, the temperature in degrees, inside an oven s seconds after the oven is turned on. Which statement relative to this equation is true? * 1 point A) Each second the temperature increases by 78

18. ## Calculus

Approximate the area under the curve of f(x)=9-x^2 between x=-2 and x=3 by calculating the area of 5 rectangles for both left hand endpoints and right hand endpoints. I have the left hand and right hand endpoints, what I need help in is solving for the

19. ## math

When you start your shift, the warehouse has 1,483 ceiling fans. if you pack and ship 32 fans per hour, how many fans will be left in the warehouse at the end of your 8 hour shift?

asked by student that needs help asap
20. ## Algebra

Factoring Polynomials GCF and Quadratic Expressions: 5b^2k^2+25bk^2-250k^2 The answer I figured was GCF for the polynomial is 5 and the GCF for the variable is bk^2. Is this correct.

21. ## English

List the characteristics that are unique to Arthur and to Sundiata. What qualities do the two characters have in common? I need help figuring out which qualities are unique to Arthur and which are unique to Sundiata.

22. ## Physics

An ideal string passes over a fixed pulley and carries masses M1 = 12kg and M2 = 8kg tied at its end. Calculate the acceleration of masses and tension in the string when released (g=10m/s2) I know the answers are a = 2 m/s^2 T = 96 N But I don't know how

23. ## Math

A ladder is leaning against a building so that the distance from the ground to the top of the ladder is 4 feet less than the length of the ladder. Find the length of the ladder if the distance from the bottom of the ladder to the building is 8 feet.

24. ## physics

A 200g mass is attached to a spring and allowed to execute simple harmonic motion with a period of 0.25seconds. If the total energy of the system is 2.0 joules, find the force constant of the spring and the amplitude of the motion.

25. ## Intermediate Algebra

Suppose a college bookstore buys a textbook from a publishing company and then marks up the price they paid for the book 33% and sells it to a student at the marked-up price. If the student pays \$75.00 for the textbook, what did the bookstore pay for it?

26. ## Math

You are driving 2760 miles across the country during the first 3 days of your trip you drive 1380 miles. If you continue to drive at the same write each day, how many days will the entire trip take?

27. ## Statistics

Consider the probability that fewer than 17 out of 145 people will get the flu this winter. Assume the probability that a given person will get he flu this winter is 11%. Approximate the probability using the normal distribution. Round the answer to four

28. ## math

How much water must be added to 60 liters of 60 percent alcohol mixture to reduce it to a mixture of 50 percent alcohol concentration? What if 30 percent alcohol mixture is added instead of water?

29. ## public and health

Which of the following statements is true? A. Carbon monoxide is a greenhouse gas B. The United States has effectively controlled its greenhouse gas emissions C. Emission of greenhouse gases by various countries is proportional to the size of their

30. ## Chemistry

Why do heteroatoms help determine the physical and chemical properties of a molecule? a They forms more bonds to other atoms than carbon can. b They possess nonbonding pairs of electrons and affect the molecule’s polarity. c They possess stronger bonds

31. ## Physics

A harmonic wave moving in the positive x direction has an amplitude of 4.4 cm, a speed of 41.0 cm/s, and a wavelength of 45.0 cm. Assume that the displacement is zero at x = 0 and t = 0. Calculate the displacement (in cm) due to the wave at x = 0.0 cm, t =

32. ## Finance

Variable rate loans typically have a 1)________ interest rate than fixed rate loans because with variable rate loans, the borrower assumes the risk that the interest rate might 2)_________. a. Higher, Increase b. Lower, Increase c. Higher, Decrease d.

33. ## Physics

You hear the sonic boom of a high-speed jet plane exactly 3.10 s after it passes directly overhead in level flight. At the time you hear the boom, you see the plane at an angle of 22.0 o above the horizon. Assume that the speed of sound at the altitude of

34. ## Health and communications

Data on quality is available for all of the following except: A. Fee-for-service providers in Massachusetts B. Managed care plans in the U.S. C. Coronary surgeons in New York State D. Effective treatment of heart attack patients I cant seem understand this

35. ## Physics

A car traveling 35.0 m/s overtakes another car going only 22.0 m/s. When the faster car is still behind the slower one, it sounds a horn of frequency 1500.0Hz. What is the frequency heard by the driver of the slower car? What is the altitude of the plane?

36. ## chemstry// organic

How does a retrosynthetic analysis propose a way to synthesize an organic compound? a.The analysis begins with an easy to obtain starting material and then adding on individual atoms to make the desired product. b.The analysis begins with the product and

37. ## calculus 2

how to find the integral of (3x+pi)cos3xdx from [pi over 6, pi over 3}

38. ## Physics

A car traveling 35.0 m/s overtakes another car going only 22.0 m/s. When the faster car is still behind the slower one, it sounds a horn of frequency 1500.0Hz. What is the frequency heard by the driver of the slower car?

39. ## Math

How can you check the answer to a decimal multiplication problem

40. ## Thermo

Argon in a rigid tank is heated from an initial state of 50 °C, 2 bar and 2m ³ to a final pressure of 8 bar. Determine the final temperature in °C to 2 decimal places. Argon cp=0.5203 kJ/kgK cv=0.3122 kJ/kgK

41. ## algebra

How much water must be added to 60 liters of 60 percent alcohol mixture to reduce it to a mixture of 50 percent alcohol concentration? What if 30 percent alcohol mixture is added instead of water?

42. ## algebra 1

Tell whether the lines for each pair of equations are parallel, perpendicular, or neither. y=-4x+3 and -2x+8y=5 A. parallel B. perpendicular C. neither I think parallel?

43. ## math

The cylindrical tank has a radius of 5 feet and is 2/3 full of water. To the nearest cubic foot, how many cubic feet of water are in the tank?

44. ## Chemistry

Glucose( C6H12O6) is produced by photosynthese. For every kilo of water the plant takes in ,how much glucose can it make ? I done the balanced equation wich is (I think) 6H2O+6CO2 = C6 H12 3O6 After that I get a ratio of 108/372 wich give me a tota of 3444

45. ## algebra

A perfume maker wishes to blend perfume valued at \$ 410 an ounce with perfume worth \$ 250 an ounce to obtain a mixture of 40 ounce worth \$ 300 an ounce. How much of the \$ 410 perfume should he use?

46. ## algebra 1

Are y=-4x+3 and -2x+8y=5 parallel, perpendicular, or neither? I think neither?

47. ## Chemistry

29.25g of sodium chloride is added to water and undergoes electrolysis according to this equation 2Cl-=Cl2 Calculate the mass of chlorine produced. I am lost with this one !

48. ## math

hello I am new here my friend recommended me this website. here is my question: if a clock chimes the number of the hour every hour, how many times will it chime in a day?

49. ## Chemistry

Which of the labeled sections in the below molecule would be considered an unsaturated portion of the molecule? A) \ B)|| C) | \\\ /\ /|\ \ a. A and B b. B only c. C only d. B and C

50. ## chemistry// organic

This is a pushing question. We discussed how phenols are typically more acidic than alcohols, even though they both contain the same hydroxyl functional group, because phenols possess an aromatic ring that delocalizes the negative charge after a proton is

51. ## math

The capacity of a rectangular tank is 5.2cubic metre and area of its base is 2.6Ã—1000 square centimetres.find its height

52. ## Math

The sum of the digits of a three digit number is 20.The middle digit is equal to one fourth the sum of the other two. If the order of the digits is reversed the number increases by 198. Find original number

53. ## physics

What is the maximum speed a car can travel over the top of a hill of radius 22 m before flying off the hill?

54. ## Algebra 1

Write an equation that relates the number of parallelograms in the figure (n) to the perimeter of the figure (P) number 1. square has a 4 at each end and a 5 on the top of the square and one 5 on the bottom of the square number 2. 2 squares attached side

55. ## math

limit x tends to infinity ( 1+root n)/(1-rootn)

56. ## Math

How do you check the answer to a decimal multiplication problem plz explain your reasoning

57. ## math

a van travelled 45km on 30 litres of diesel. How far could it travel on 45 litres?

A contract cannot involve both and implied warranty of merchant ability and an implied warranty of

59. ## Chemistry (organic)

What is the molecular formula for the below line-angle structure? The structure is a pentagon with one line connected to a corner. I'm sorry if that doesn't make any sense but the picture will not paste here. a C6H11 b C5H11 c C7H12 d C5H13 e C6H12 Thank

60. ## chemistry// organic

What type of reaction forms an alkaloid salt? a. The reaction between an amine and an alcohol. b. The reaction between an amine and an acid. c. The reaction between an alcohol and a base. d. The reaction between an amine and a base. e. The reaction between

61. ## algebra 1

f(x) = 10(2)^x Is this function's rate of change over the interval -1 ≤ x ≤ 2 greater or less than that of the linear function g(x)=10x + 7? -- What is this problem asking me to do and how do I do it?

62. ## Math

The transformation T:R^2--》R^2 is defined by T(1,0)=(2,-5) and T(-3,2)=(1,4). Find the natural matrix of the linear transformation T and find T(x,y).

63. ## Calculus

Find dy/dx and express the final answer with a common denominator y=ln x^(2(4x-12))

64. ## Science

A runner compels one lap around a 300-m oval track, returning to her staring position. What distance does she cover, and what was her displacement? Explain.

65. ## calculus 2

How to solve the definite integral of(3x+pi)cos3xdx from [pi over6,pi over 3]

66. ## Calculus

Find dy/dx and express the final answer with a common denominator y=lnx^2(4x-12)

67. ## Math

The sum of the digits of a three digit number is 20. The middle digit is equal to one fourth the sum of the other two. If the order of degree is reversed the number increases by 198. Find the original number

68. ## Calculus

Calculate the Riemann sum of the area under the curve of f(x)=9-x^2 between x=-2 and x=3 The answer I come up with is 10/3, but when I solve using integrals, the answer I get is 100/3. Am I doing something wrong?

69. ## Math

after a cyclist has gone 2/3 of her route, she gets a puncture in a tire. Finishing on foot, she spends twice as long walking as she did riding. How many times as fast does she ride as walk? I know that the answer is 4 but do not know how to get to this

70. ## math

I have an equation of P=(170-3x)(x-25) How do I determine the y-intercept I know I can determine the x intercepts by setting x = to zero, so those are easy to find, but I'm not sure how to find the y-intercept. Thank you.

71. ## Math

Suppose C and D are 2 × 2 matrices with det(C) = −3 and det(D) = 2. Find the determinant of the matrices 8C^3D2 and 5 C^-1

72. ## Math

my family has a \$6000/ month budget. we spend 1/3 of our budget on food, 1/4 on our mortgage, 1/5 for clothing, and 1/10 for childcare. How much money is left for other expenses

what is the explicit formula of NOW . 3 = Next answer: y=______blank____________ thanks!

74. ## physics

A certain sample of a pure quartz crystal has a mass of 276 grams and a volume 95.8cm^3. -what is the mass density of the sample? -what would be the volume of a larger quartz crystal of the same density if its mass is 1.138 kg? Help please!! Have been

75. ## algrebra 2

f(x)=2x-2 g(x)=4x+2 find (f0g)(x)

76. ## Geometry

M angle pqr =80 m arc pyr=80 find m arc pxr and m angle pqr

77. ## poetry and creative writing

this needs a friend or sibling to do with but I don't have a sibling or a friend who is not busy. My parents have gone too work too. Can u help me instead? write a colourful description, using as many senses as possible. Describe a market or shop know to

78. ## Chemistry

What is the name of the below organic compound? | \ \ | | \/\/\/ This is kind of what it looks like sorry this looks so horrible the image would not copy over. a 1,1,3-triethylhexane b 3-ethyl-5-propylheptane c 3-propyl-5-ethylheptane d 3,5-diethyloctane

79. ## Math - Steve

I posted this question yesterday that you answered, so thank you, but how do I put this in my calculator to get this answer? If the exponential equation of best fit is y= 2.9046(1.9798)^x, when will the population be more than 13 million? How would I

80. ## Geometry: Right Triangles

In my math homework, it is asking me to find the height of a triangle. Does anyone know how to find the height of a triangle? If you could, could someone give me an example problem? Thanks a lot!

81. ## Maths

Only using 2357,what number is a three digit number that add by a four digit number and equals to a five digit number? You can only use zero on the last digit of the four digit number.

82. ## Science

Why does 1 hour and 15 minute is 1.25

83. ## algebra 1

I need to find the slope of a line that is parallel to the x-axis, completely perpendicular. The answer choices are A. 0 B. 1 C. undefined D. infinity I'm thinking undefined?

84. ## algrebra 2

g(n)=-4n+2 h(n)=3n+3 Find (g0h)(n)

85. ## math

The tank has a radius of 5 feet and is 2/3 full of water. To the nearest cubic foot, how many cubic feet of water are in the tank?

86. ## pre calc

why does x^4+7 and x^4 have the same derivative, meaning can someone explain to me why they are both equal to the derivative 4x^3?

87. ## calculus 2

find the definite integral for 3x+pi for the fraction interval pi over 3 and pi over 6