# Vince

Popular questions and responses by Vince
1. ## Math

At Harry's Discount Hardware everything is sold for 20% less than the price marked. If Harry buys tool kits for \$80, what price should he mark them if he wants to make a 20% profit on his cost?

2. ## Math

The scale of map is 1:20000. Find the area on the map which represents 124km^2

3. ## Chemistry

1) A quantity of 85 mL of .900 M HCl is mixed with 85 mL of .900 M KOH in a constant-pressure calorimeter that has a heat capacity of 325 J/C. If the initial temperatures of both solutions are the same at 18.24 degrees C, what is the final temperature of

4. ## Chemistry

0.000333 g fluorescein (332.32 g/mol) is dissolved in 225 mL solution of ethanol. The density of ethanol is 0.785 g/mL. What is the concentration of the solution in molarity (M)? How many ppm? I already know that the molarity is 4.45E-6. I just need help

5. ## Chem

40. If 12.0 gram of O2 is required to inflate a balloon to a certain size at 27 degrees C, what mass of O2 is required to inflate it to the same size and pressure at 81 deg C?

6. ## chemistry

What temperature is required to produce a carbon dioxide partial pressure of 1.0 ? BaCO3¡êBaO + CO2

7. ## Math/Solve

ABC phone company charges \$17 per month plus \$0.03 per minute of phone calls. XYZ phone company charges \$8 per month plus \$0.06 per minute of phone calls. How many minutes of phone calls in a month make XYZ phone company a better deal?

8. ## Chemistry

How many moles are contained in 1.20 x 1024 molecules CO2?

9. ## MATH

What is the standard deviation of the following data? If necessary, round your answer to two decimal places. 46, 53, 38, 67, 46, 57, 61, 42, 63, 55, 46

10. ## MATH

A bag has 4 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a yellow marble, do not replace it, and pick another yellow marble?

11. ## Physics

A 39.0 kg box initially at rest is pushed 4.50 m along a rough, horizontal floor with a constant applied horizontal force of 135 N. If the coefficient of friction between box and floor is 0.300, find the following. (a) the work done by the applied force J

12. ## Math

A bag holds 2 yellow, 1 green, and 2 red marbles. If you were to draw a marble from the bag 150 times, and replace it after each draw, how many yellow marbles would you expect to draw? (1 point) A:50 B:60 C:30 D:38 I say it's B or A

13. ## Physics

A water slide is constructed so that swimmers, starting from rest at the top of the slide, leave the end of the slide traveling horizontally. One person hits the water 5.00 m from the end of the slide in a time of 1.000 s after leaving the slide. Ignoring

14. ## physics

four forces 8N,6n,2n and 4n act on a point O in the directions north,east,south and west respectively,find the magnitude of their result and the direction of their resultant force.

15. ## College Algebra

Carbon-14 Dating. Only 10% of the carbon-14 in a samll wooden bowl remains. How old is the bowl? Half life of carbon is 5700 years.

16. ## math word problem

"Adult tickets are \$6, Kids are \$3. If the total sales are \$585, but only 120 tickets were sold, how many adult tickets were sold? If this was 130 it would be easy: \$3+\$6 =\$9; \$585/\$9 = 65 tickets. The problem is the question specifies 120 tickets.

17. ## Math

A mother is 21 years older than her new born daughter. How old will the daughter be when her age is 1/4 of her mother's?

18. ## Chemistry

How much 2 M KOH must be added to 0.5 L of 0.2 M glycine at pH 8 to bring its pH exactly to 10?

19. ## gen Chem

I've attempted this problem but not sure if i'm on the right track. Use the enthalpy diagram provided above and apply Hess’s Law to determine the standard enthalpy of formation for C12O36H20N12 (s) using the results from part (a) and the following

20. ## math

For small values of h, the function (16+h)^1/4 is best approximately by which of the following? a. 4+h/32 b. 2+h/32 c. h/32 d. 4-h/32 e. 2-h/32

21. ## MATH

A bag has 5 red marbles, 6 blue marbles and 4 black marbles. What is the probability of picking a blue marble, replacing it, and then picking a black marble?

22. ## MATH

Triangle DEF is similar to triangle PQR. Side DE measures 3, side EF measures 7 and side FD measures 9. Side PQ measures 5x – 25 and side QR measures 6x + 4. Find the value of x.

23. ## MATH

What is the equation of the parabola with a directrix at y = 4 and focus (0, -4).

24. ## math

need help with math word problems. just don't understand. What is the number? you have a four digit number where the thousands digit is four greater than the hundreds digit.The tens digit is twice the thousands digit. The ones digit is half of the

25. ## algebra 2

Boat builders share an old rule of thumb for sailboats. The maximum speed 𝐾 in knots is 1.35 times the square root of the length 𝐿 in feet of the boat’s waterline. If a customer is planning on ordering a sailboat with a maximum speed of 8 knots how

26. ## Chemistry/Elements

What is needed to have Nitrogen and Lithium react?

27. ## math

a total of \$5000 is invested at 2%, 3%, and 4%. the amount invested at 4% is equal to 2% and 3% combined together. the total interest gained for 1 year is \$145. find the amount invested at each rate.

28. ## finance

Thompson stores is considering a project that has the following cash flow data. What is the project's IRR. Note that a project's projected IRR can be less than the WACC and even negative, in which case it wll be rejected. Year 0 (\$1,000), year 1 \$300, year

29. ## Math

A square of area 2 is inscribed in a circle. What is the area of the circle?

30. ## Chemistry

Q: How is boiling different from sublimation?

I still do not understand this problem? find a number such that when added to the numerator and denominator of 2/11 yields a fraction equivalent to 1/2? thanks If you add 7 to the numerator and 7 to the denominator you get 9/18. 9/18= 9x1/9x2 = 1/2 It

32. ## Math

Mary's age is 2/3 that of peter's. Two years ago Mary's age was 1/2 of what Peter's age will be in 5 year's time. How old is peter now?

33. ## math/ratio tables

A girl runs 50 miles in 60 minutes. At this rate,how long would it take her to run 15 miles?

34. ## EASY GRAPHING QUESTION

Write the equation of a circle with a center at (2.5, –3.5) and a radius of 1.2.

35. ## Math

On an automobile assembly line, every third car is green. Every fourth car is a convertible. a) How many cars are out of the first 100 will be convertibles? b) Which number of car is First Green convertibles? Grade 7 Math Please answer, ASAP.

36. ## Math

I need help. So supposed that you have three diffrent lenghts of linking cubes as shown below . ( 5 blacks, 3 whites 2, reds) Assume that you have as many of these lengths as you need, but you may not take them apart. a) 25 d) 29 b) 20 e) 30 c) 18 f) 32

37. ## Geometry

Find the equation of the circle which is concentric with the circle x^2+y^2+3y-8y+16=0 and tangent to the line 4x+3y-12=0. Show your solution.

38. ## Geometry

A 40lb child is sitting at A(2,3) and a 30lb child is at B(12,7) where units are feet. Find the point P between A and B which could be used as the fulcrum of a teeterboard putting the two children in equilibrium(Hint:40AP=30PB)

39. ## EASY GRAPHING QUESTION

Write the equation of a circle with a center at (15, –35) and a diameter of 100.

40. ## Calc

Air is being pumped into a spherical balloon so that its volume increases at a rate of 90{cm}^3/s. How fast is the surface area of the balloon increasing when its radius is 7{cm}? Recall that a ball of radius r has volume \displaystyle V={4}/{3}pie r^3 and

41. ## algeb collage

solve the inequality,express using interval notation x3-5x2-14x>0

42. ## pre-cal

tan((theta/2)+(pi/6))=-1

43. ## math

it is cross math (like sudouk) six rows across and six rows down 1st row has empty box, +, empty box, + box =6 this row is across 2nd row has x blacked out box, +, blacked out box, x, blacked out box this row is across 3rd row across is empty box, +, empty

44. ## Math!

A rectangle is 15cm x 12cm. If the length is reduced by R cm and its width is increased by R cm. Its area is reduced by 4cm^2.

45. ## matn

need help with word problem? half add it Find a number such that when added to numerator and denominator of 2/11 yields a fraction equivalent to 1/2? thanks for any help (x+2)/(x+11) = 1/2 x is the number you want. Now do the algebra. I will be happy to

46. ## physics

A boy throws a ball at 5.5 m/s at an angle of 25.4° above the horizontal off a cliff which is 70.8 m high. What angle does the velocity of the ball make with the horizontal 0.78 s after the throw? (make the angle positive if the angle is above the

47. ## MATH

A bag has 4 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a yellow marble, do not replace it, and pick a red marble?

48. ## Computer Science

What is a database management system? What are it's advantages over conventional file processing system?

49. ## Computer Science

What do you understand by life cycle of software development? Explain briefly the various stages of software development life-cycle.

50. ## Computer Science

What do you understand by life cycle of software development? Explain briefly the various stages of software development life-cycle.

51. ## health

In terms of decsion making sequences, how would you explain and describe : A. The 25-year-old, healthy worker who sees that sam physician for minor medial needs?

52. ## EASY MATH QUESTION

What is the probability of rolling a 1, 2, 4, 5, or 6 on a six sided dice? MAKE SURE TO READ THE QUESTION CAREFULLY!

53. ## THIS IS AN EASY QUESTION!!!

(too bad I don't know how to solve it!) How many different ways can the letters in the word “square” be arranged?

54. ## Physics

Why does a rubbed balloon stick to the wall?

55. ## Math

How would I make z the subject of the formulae: x=y(z-y)/z

56. ## Computer Science

What do you understand by life cycle of software development? Explain briefly the various stages of software development life-cycle.

57. ## Math

How do I solve this equation 3d-81d^2=0

58. ## Math

How do I solve this simultaneous equation 3x-2y=5 (1) 2y-5x=9 (2) I managed to find the value of x and that is -7 but I am having problems to substitute it's value in equation (1)

59. ## Math

A bag has 4 green marbles, 3 red marbles, and 3 yellow marbles. What is the probability that you pick a yellow marble, do not replace it, and pick a red marble?

60. ## science

how do bacterial plasmids relate to resistance and how do they relate to genetic engineering. i am very stuck and i need help please

61. ## Math

The scale of map is 1:20000. Find the area on the map which represents 124km^2

62. ## IGCSE

Is it possible to take igcse examinations in America?

63. ## math

write the following as a rate in lowest terms \$402 for 18 rolls of film To find the rate for one roll of film, divide \$402 by 18.

64. ## science

for every cubic meter of 30 degrees celsius saturated coded to 16 degrees celsius fowmany grams lost

65. ## psychology

Can the expression on your face produce the emotion which you would like to experience? Explain. ------ I believe that expression on ourface produce the emotion which we would like to experence. right? even though we are sad inside we tend to be happy. and

66. ## MATH

Write the equation of a parabola with a vertex at (-5, 2) and a directrix y = -1.

67. ## EASY MATH

Write the equation of a hyperbola with a center at (-5, -3), vertices at (-5, -5) and (-5, -1) and co-vertices at (-11, -3) and (1, -3).

68. ## Math

how would i express the following fraction with a single denominator e-4/5 +1

70. ## math

x^3-6x^2>0 anser in interval notation

71. ## Precalculus

please write an equation in standard x^2-y^2-2x+4y-7=0 * standard form *center *vertices *foci *asymptotes Thank-you you

72. ## math

sketch the graph of the linear function passing through (-6,5) and (-6,3)

73. ## Math

Function rule for x=1,2,3,4 & y=7,7,9,11

74. ## Math

How do I solve this equation 7x^3+21x^2=0

75. ## Chemistry

Q: How is melting different from evaporation?

76. ## History

Where can i find info on china and japan during 18th to 19th century.

77. ## English

I have to write a paper on the Pseudo-Modern movement and how it relates to movie, music, artwork, an article, and a 21st century. I can't find an example for each of these cases.

What are the benefits associated with quality awards!? please could someone help me! cheers!

79. ## math

x^3-6x^2>0 anser in interval notation

80. ## Calc II

1) Find the point on the graph of y=x^2 where the cube has slope 5/2 2) Find the point on the graph of y=x^2 where the tangent line is parallel to the line -4x+3y=3

82. ## MAth

The wilkinson family drove 1.374 miles in 9 days.how many miles did they drive on last day

83. ## History

What limits on national powers can be derived from the tenth amendment?

how do bacterial plasmids relate to resistance and how do they relate to genetic engineering. i am very syuck and i need help please

85. ## Math

How do I solve this equation 4n^2-25=0

86. ## science

how much water does the usa use yearly

1. ## Physics

69

posted on November 19, 2018
2. ## Dudas

Hi guys ULOL

posted on November 19, 2018
3. ## Dudas

Tanga ako

posted on November 19, 2018
4. ## American government

Collective

posted on December 16, 2017
5. ## Chemistry

P=(3.0/6.0) x (250/350) 1.5 .53

posted on February 12, 2017
6. ## Math

Thanks Ms.Sue

posted on September 8, 2016
7. ## Math

pls answer as soon as posible.

posted on September 7, 2016
8. ## calc

just believe in god

posted on August 31, 2016
9. ## ALgebra

80

posted on May 14, 2016
10. ## chemistry

posted on October 20, 2015
11. ## algebra 2

Thanks for not answer my question though :) really appreciate it

posted on May 5, 2015
12. ## algebra 2

I am only Bill and Vince not the other ones

posted on May 1, 2015
13. ## Math/Solve

i was able to figure it out 0.06m +8

posted on February 26, 2015
14. ## math

no sir im pretty sure i typed it correctly from what my professor gave me. i also got -500 but it seems wrong so i went here. thank you so much for taking time and answering my question :)

posted on February 10, 2015