# melinda

Most popular questions and responses by melinda
1. ## Precalculus

Determine the exact value of cos 465 degrees a) √3 + √2/2 b) √2 + √3√2/4 c)√2 - √3√2/4 d)2+√2-√3√2/4

2. ## Math

Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 - 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree.

3. ## chemistry

Na3PO4(aq) and AgNO3(aq). Write the ionic equation.

4. ## Calculus

An object is dropped from the observation deck of the Skylon Tower in Niagara Falls, Ontario. The distance, in metres, from the deck at t seconds is given by d(t)=4.9t^2 a) the height of the observation deck is 146.9 m. How fast is the object moving when

5. ## Chemistry

write isotpoic symbols of the form X-A (for example, C-13) for each of the following isotopes. **Do I add the number of protons and neutrons together to get the answer? The symbol is easy to figure out.** a) the iodine isotope with 74 neutrons B) the

6. ## Chemistry

At 20 C (approximately room temperature) the average velocity of N2 molecules in air is 1050 mph. What is the velocity of a molecule of N2? What is the kinetic energy of a N2 molecule with this velocity? What is the kinetic energy of a mole of N2? I know

7. ## Calculus-help~

A certain fast food restaurant wants to determine the increase in revenue per cheeseburger if sales are \$45,000. Let the function [p=(120000-x)/(30000)] represent the price of x cheeseburgers.

The figure shows three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub.

9. ## chemistry

Calculate the standared enthalpy of formation of solid Mg(OH)2 given the following data: 2Mg(s) + O29(g) →2MgO(s) ∆H = -1203.6kJ Mg(OH)2(s) →MgO(s) + H2O(l) ∆H= +37.1kJ 2H2(g) +O2(g) →2H2O(l) ∆H = -571.7kJ

10. ## Chem

A sample of an unknown biochemical compound is found to have a percent composition of 55.03 percent carbon, 5.54 percent hydrogen, 32.10 percent nitrogen and the balance oxygen. What is the simplest formula for this compound ? How do I do this?

11. ## Physics

The figure shows three rotating, uniform disks that are coupled by belts. One belt runs around the rims of disks A and C. Another belt runs around a central hub on disk A and the rim of disk B. The belts move smoothly without slippage on the rims and hub.

12. ## Alliedhealth

A woman is brought into an emergency room after a severe automobile accident. She’s unconscious and badly injured. Her husband arrives at the emergency room at the same time as she arrives in the ambulance. The doctor explains the wife’s condition to

13. ## physics

A uniform thin wire is bent into a semicircle of radius r. Determine the coordinates of its center of mass with respect to an origin of coordinates at the center of the "full" circle. Because wire is uniform x (sub cm) = 0 mass=dm length=dl coordinates

14. ## Physics

a uniform thin wire is bent into a semicircle of radius r, determine the coordinates of its center of mass with respect to an origin of coordinates at the center of the full circle

15. ## physics

A uniform thin wire is bent into a semicircle of radius r. Determine the coordinates of its center of mass with respect to an origin of coordinates at the center of the "full" circle. Because wire is uniform x (sub cm) = 0 mass=dm length=dl coordinates

16. ## English

We're studying a !@#\$%^&inson poem Wild Nights-- I have a question Wild Nights--Wild Night! Were I with thee 1. Is that an example of an internal rhyme, slant rhyme, alliteration or caesura? 2. The poem has two stanzas that are ABBA and then two ABCB and

17. ## Calculus-concave up and down

Can someone explain this question to me? What intervals should I use to test whether or not the graph is concave up or down. Here is the URL for the graph. imgur dotcom/FdQCV

18. ## Precalculus

Verify these answers 1.Which of the six trigonometric functions are positive in quadrant III? Answer: tangent and cotangent -------------------------------------- 2. What is the amplitude of the function y = pi/2 sin(6/3t - pi/6) + 14? Amplitude: pi/2

19. ## Math

Someone verify if this is correct, please! 1. Draw a distance versus time graph that corresponds to the walk described below. Adam starts 8 m away from the motion sensor and walks in a straight line toward the sensor at a constant rate of 0.5 m/s for 3 s.

20. ## Calculus

Which of the following is the maximum value of the function f(x)=2sinxcosx? a) 0 b) 1 c) 2 d) No maximum value

22. ## Precalculus

1. What two common identities are most useful for simplifying 2tanx/(sin^2x + cos^2x - tan^2x)? Two identities are: sin^2x + cos^2x = 1 and tan2x=2tanx/1-tan^2x

23. ## •teaching in early chldhood programs

When assessing the overall layout of a classroom, what two factors should be so clear that children's movement behavior will be directly influenced? A. The amount of child-accessible storage and the presence of children's art materials B. The location of

24. ## •teaching in early chldhood programs

Which of the following is a correct statement about exploratory play? A. In exploratory play, children assume primary responsibility. B. In exploratory play, who assumes responsibility depends on which learning center the activity is set up in. C. In

25. ## Math

Would someone verify these answers. 1. A person waves his hand back and forth, where their finger tips move past the starting position 4 cm in each direction. If he waves 20 times every 15s, what sine equation models the movement of the hand if the hand

26. ## math

An open-topped box is made from a rectangular piece of cardboard, with dimensions of 24 cm by 30 cm, by cutting congruent squares from each corner and folding up the sides. Determine the dimensions of the squares to be cut to create a box with a volume of

27. ## science

a 60.0kg boy runs up the stairs of a football stadium to a height of 12m above the ground 15s.what are the work and power student has done

28. ## Calculus

Vector C=5 and Vector D=8. The angle formed by C and D is 35 degrees, and the angle formed by A and C is 40 degrees. Determine |B|. Here is the image for triangle: imgur dot com/OZAwV please help, I have a test tomorrow~

29. ## Math

Would someone like to help me with these questions? Steps appreciated~ 1. If the diameter of a monster truck tire is 3.5 m and it makes one rotation every 5 seconds, how far does the tire roll in 1 minute? -------------------------------------- 2. At t=0 a

30. ## precalculus

How do I find the vertical/horizontal compression/stretch? For the graph, determine the equation of the function in the form y=a(x-h)^2+k. Then describe the transformations that were applied to y=x^2 to obtain the graph. Here is the graph: imgur dot

31. ## Precalculus

Can someone help me with this question? I got the transformation for horizontal shift and vertical shift, however, I don't know how to find the vertical/horizontal compression/stretch. 1. Describe the transformations that were applied to the parent

32. ## math

In a Garden one fourth of the plants are peppers of the pepper plants one-third are yellow peppers what fraction of the plants are yellow peppers

33. ## algebra 1 part 2

What are the minimum, first quartile, median, third quartile, and maximum of the data set? As cars passed a checkpoint, the following speeds were clocked and recorded. Speed (mph): 55 62 61 54 68 72 59 61 70

34. ## Chemistry

This is a three part problem I need help in figuring out pleaseI n each of the questions below you are going to determine a different type of balanced equation for the same reaction. Make sure your equations have the lowest whole number coefficients

35. ## staticstics

The average length of an adult blue whate is 30 meters with a standard deviation of 5.7 meters. If a sample of 31 whales is taken, what is the probability that their average lenght differs from the mean by more than 2.0 meters

36. ## Chemistry

This is a three part problem I need help in figuring out pleaseI n each of the questions below you are going to determine a different type of balanced equation for the same reaction. Make sure your equations have the lowest whole number coefficients

37. ## Math

The number of library books in a school increased by 20% after it bought new books in may. The number increased by another 20% after a bookstore donated 300 books in June. Find the number of books in the library before it bought new books in May.

38. ## ◦teaching in early chldhood programs

Which of the following is an example of an appropriate activity-plan objective? A. The child puts the story characters in sequence on the flannel board. B. The child feels good about his or her participation in the activity. C. Children think about seeds

39. ## Trig

If a plane takes off on runway 31 (N 31o W) and flies 4 miles, then makes a right (90o) turn and flies 11 miles, what bearing will the traffic controller use to locate the plane?

40. ## geometry

Express the following as a function of a single angle sin 20 degree cos 30 degree + cos 20 degree sin 30 degree

41. ## Math

I need help with this question, it says to find the instantaneous rate at distance t = 6s with the given graph First of all, it is a linear line, do i need to find the equation of the graph? After finding the equation, i plug in 5.99 and 6.01? and solve ?

42. ## chemistry

if you have 0.454 grams of sulfur trioxide, how many moles does this represent? how many molecules? how many oxygens atoms?

43. ## Math

in a rectangle the measures of the base and the altitude are in a ratio of 1:4. I f the rectangle is equal in area to a square with a perimeter of 60 feet, find the dimensions of the rectangle HELP PLEASE TYSM!!

44. ## staticstics

The average length of an adult blue whate is 30 meters with a standard deviation of 5.7 meters. If a sample of 31 whales is taken, what is the probability that their average lenght differs from the mean by more than 2.0 meters

45. ## math

round off 16,352 to the nearest tens

47. ## Physics

This question really has me stumped and I don't know why, I seem to have forgotten the process . . . A model electric train requires 6 V to operate. If the primary coil of its transformer has 240 windings, how many windings should the secondary have if the

48. ## Precalculus

What two common identities are most useful for simplifying 2tanx/sin^2x + cos^2x - tan^2x? Two identities are: sin^2x + cos^2x = 1 and tan2x=2tanx/1-tan^2x

49. ## Math

How to setup this equation? Find the ratio of the surface area of a cylinder to the volume of the cylinder if the height remains at 10 cm. Simplify this ratio and let f(x) = the simplified ratio. Let r be the radius of the cylinder. a) Find the average

50. ## Precalculus

How do you setup the equation for this? Thanky ou! Find the ratio of the surface area of a cylinder to the volume of the cylinder if the height remains at 10 cm. Simplify this ratio and let f(x) = the simplified ratio. Let r be the radius of the cylinder.

51. ## precalculus

Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 - 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree.

52. ## Physics

Please help- A small fish is dropped by a pelican that is rising steadily at 0.50 m/s. How far below the pelican is the fish after 2.5 s? Answers. 61m 29.3 30.6 1.1m I just started school and I'm totally lost-If someone could explain formula to me I'd

53. ## teaching in early chldhood programs

Which of the following is an example of an appropriate activity-plan objective? A. The child puts the story characters in sequence on the flannel board. B. The child feels good about his or her participation in the activity. C. Children think about seeds

54. ## algebra

y = 5x, solve for x

55. ## math

At Thanksgiving dinner, Deborah ate a portion of turkey (673 calories;masch potatoes (408 calories);stuffing (519 calories); cranberry sauce (219 calories);beans (278 calories); and pumpkin pie (523 calories); approximately how many calories did she

56. ## Calculus and vectors

A parallelogram is formed by R^3 by the vectors PA=(3,2,-3) and PB=(4,1,5). The point P=(0,2,3). a) what are the location of the vertices? b) what are the vectors representing the diagonals? c) what are the length of the diagonals?

57. ## Calculus-derivatives

Determine the derivative for y=tanxcosx a) y'=-sinxtanx + cosxsec^2x b) y'=-sinxtanx + cosxtanx c) y'=cosxsec^2x d) y'=sinx - cosxsec^2x

58. ## Math

I have no clue what to do on these questions. 1.Two resistors a and b are connected in parallel. The total resistance R in such a circuit is found by formula R= 1/a + 1/b. If R=5/6 ohms and b is one more ohm than a, find the number of ohms in a and b. 2.

59. ## precalculus

Can someone verify if my answer is right? 1. Which function has a negative average rate of change on the interval 1

60. ## algebra

how do you do this problem? perform indicated operation write answer as a fraction, simplify. 1/11+ 5/6

Could someone check these please?I had place a possessive adjective in place of el 1. El hermano de Juan y Pedro se llama Bret Answer: Su hermano se llama Bret 2.Replace los with possessive Los hermanos de Paco y Linda se llama Santiago y Jose Answer: Sus

62. ## geometry

When finding the perimeter of a figure on a grid,whydo you not count the spaces inside tha grid?

63. ## GRAMMAR/SENTENCE STRUCTURE

John Darsee has been one of many scientists and researchers involved with the scandal of scientific misconduct, where he deliberately falsified data and published his results to scientific journals. First, I will discuss the case of John Darsee, as well,

64. ## PHILOSOPHY REPOST

need to apply the moral theory of rule utilitarianism in my essay but i don't really understand what it is. i tried google and wiki but it doesnt really provide me with clear meaning, or examples. could someone please explain to be as simple as possible

65. ## math

subtract 345 from 678

66. ## Calculus and vectors

Do the vectors (2,0,1),(-2,0,0) and (2,3,0) lie on the same plane? Explain your reasoning.

67. ## Precalculus

What am I doing wrong? I keep getting 48 and its wrong... Solve 2log(x)-log(4)=3log(4) 2log(x)-log(4) log(x/4)=3log4 log(x/4)=log12 x=48

68. ## Precalculus

Verify these answers please. 1. Which of the following functions would f(x) = log(base 10)x horizontally 4 units to the left? a) f(x)=log(base10)(x-4) b) f(x)=4Log(base10)X c) f(x)=log(base10) x+4 Answer: C ------------------------------------ 2. State the

69. ## Precalculus

Can someone help me with this question (It's a graph) imgur dot com/r16ba One of the answers would be: x= 2 not x=-2 (If you think its an unsafe website, type in google "Imgur," it'll show you that its a site to post images)

70. ## Precalculus

Can someone help me with this question (It's a graph) imgur dot com/r16ba One of the answers would be: x= 2 not x=-2

71. ## geometry

find the value of following sin(cos^-1 12/13) give your answer as a fraction

72. ## geometry

find the value of following sin(cos^-1 12/13) give your answer as a fraction

73. ## precalculus

How do you do this question? 1. A speed versus time graph shows the segment from (3, 4) to (8,4). The units for the vertical axis are m/s. If the object whose speed was being graphed is 8 m away from the point from which measurements are made at t= 3s, how

74. ## Math

Please help! What is the solution of 5 - 2x is greater than -3 OR -3x + 9 is less than -6 Thank you

I am in need of help with Microsoft Office Access 07. I am trying to set relationship tables and I have to enforce referential integrity on all 4 of my tables and cannot get it to work. What do I need to do? Thanks

76. ## grammar/sentence structure

would someone please check over my paragraphs for any grammatical errors, and more importantly, correct sentence structure? I was told I was bad at both... thank you so much in advance! The case of scientific fraud I would like to discuss extensively is

77. ## teaching in early chldhood programs

Which of the following is a common mistake new teachers make when setting up learning centers? A. Planning specific activities for blocks or dramatic play B. Introducing the centers to children so they know how to use them C. Allowing the children to

78. ## What is a biology lab practical?

Is it a test on paper or can I look at notes and answer questions? Do I have to dissect something, have the TA ask me a question and answer instead of dissecting as a group? I've just been quizzing myself on parts of the animal in case we can't use notes,

79. ## Finance

Stephenson Real Estate Capitalization

80. ## math

solve the problem 456 + 65.

81. ## math

randall opened a savings account on June 1st and made the following deposits: \$212.19, June 5th \$23.03, June 12 \$307.15, June 19th \$652.00 and June 30, \$78.75. Assuming he made no withdrawals, approximately how much did he have in the savings account at

82. ## Calculus

If a(0,-1,3)+b(1,1,1)-c(1,2,5)=(-2,3,-8), determine a,b,c Is this the correct answer: a= -4, b= -3, c= -1?

83. ## Calculus

If a(0,-1,3)+b(1,1,1)-c(1,2,5)=(-2,3,-8), determine a,b,c

84. ## Precalculus-Verify

log(base2)x-log(base2)6= log(base2)5+ 2log(base2)3 log(x/6)=3log15 (x/6)=15^3 6*(x/6)=15^3*6 x=15^3*6 =20,250 Answer is 270.... What did I do wrong...

85. ## Precalculus

Given the parent function f(x)log(base10)x, state the equation of the function that results from a vertical stretch by a factor of 2/5, a horizontal stretch by a factor of 3/4, a reflection in the y-axis , a horizontal translation 2 units to the right, and

86. ## Precalculus

Given the parent function f(x)log(base10)x, state the equation of the function that results from a vertical stretch by a factor of 2/5, a horizontal stretch by a factor of 3/4, a reflection in the y-axis , a horizontal translation 2 units to the right, and

87. ## Precalculus

Explain how to do these please. 1. solve x=log(base2)*1/8 by rewriting in exponential form. 2. Solve log(3x+1)=5 3. Solve log(base x)8=-1/2

88. ## Precalculus-helpp

Verify if my answers are correct. 1. The function y=x^3 has undergone the following sets of transformations. If y=x^3 passes through the points (1,1), (3,27) and (4,64), list the coordinates of these transformed points on each new curve. a) reflected in

89. ## Precalculus

Verify if my answers are correct. 1. The function y=x^3 has undergone the following sets of transformations. If y=x^3 passes through the points (1,1), (3,27) and (4,64), list the coordinates of these transformed points on each new curve. a) reflected in

90. ## precalculus

Determine the x-intercepts of the polynomial function y=-6(x+7)^4 + 5. Round to two decimal places, if necessary. y=-6(x+7)^4 + 5 0=-6(x+7)^4 + 5 -5=6(x+7)^4 -5/6 =(x+7)^4 There are no x-intercepts??

91. ## geometry

in a diagram of a scalene triangle ABC, line DE is the midpoint of line AB and line AC and DE=7 find the length of line BC

92. ## Math

Solve the following system of equations. x + 4y= 8 (1) x=5-4y (2) What is the solution of the system? (Type an ordered pair. Type N if no solution).

93. ## math

I need help in math can you help me in math.

94. ## math

I need help in math can you help.

95. ## essay edit

sorry to do this to you, gurublue, but i had to break it up into different pieces...this is the last one, i swear!! The scientific misconduct case of John Darsee is wrong and immoral, based on the moral theory of rule utilitarianism. I will argue why this

96. ## Math

Given; a=2.52, c=4.75 find the remaining parts of the right triangle. I found b which equals 4.03 but need help with the angle. We already know that one angle = 90 since its a right triangle. I just need to know angle A. Angle A = a)58 degrees b)32 degrees

97. ## Math (triangles)

Given b=48, A=36 degrees find the remaining parts of the right triangle. B= a)144 degrees b)154 degrees c)54 degrees d)64 degrees We know that one angle equals 36 and since it is a right triangle another must equal 90. The sum of the angles of a triangle

98. ## economics

Business leaders in a small but thriving community in the southeast have noticed a considerable increase in the alcohol consumption of their workers. This increase, they claim, reduces worker productivity, increases absenteeism and jeopardizes safety on

99. ## Basic Geometry

What does ' mean? ie. triangle abc is congruent to triangle a'b'c'