Lee

Most popular questions and responses by Lee
1. algebra

Could someone check my work; 1. Generate the first five terms in the sequence using the explicit formula. yn = –5n – 5 –30, –25, –20, –15, –10 30, 25, 20, 15, 10 –10, –15, –20, –25, –30(my answer) 10, 15, 20, 25, 30 2. What is the

asked on February 3, 2013
2. algebra

Can someone check my answers on exploring conic sections? 1. Graph x2 + y2 = 9. What are its lines of symmetry? Every line through the center is a line of symmetry. The y-axis and the x-axis are lines of symmetry.( my choice) Every line through the center

asked on February 19, 2013
3. chemistry

Write the equation for the decomposition of water into its elements. Phase symbols are not graded.

asked on April 17, 2013
4. physics

A wave of amplitude .30 m interferes with a second wave of amplitude .20 m. What are the largest and smallest displeacements that can occur? What type of interference is demonstrated by each displacement?

asked on September 8, 2009
5. algebra

what is the simpliest form of the equation 3 sqrt 750 + 3 sqrt 2058 - 3 sqrt 48 possible answers 14 3sqrt6 17.5 3sqrt6 33 3sqrt6 10 3sqrt6

asked on December 2, 2012
6. algebra

Which steps transform the graph of y=x^2 to y=-2(x-2)^2+2. a) translate 2 units to the left translate down 2 units stretch by factor 2 b)translate 2 units to the right translate up 2 units stretch by the factor 2 c)reflect across the x-axis translate 2

asked on October 29, 2012
7. algebra

Can someone check my answers please and if Im wrong please explain. 1) graph 4x^2+4y^2=64. what are the domain and range? domain;all real numbers range;-4

asked on February 22, 2013
8. Physics

A person driving her car at 45km/h approaches an intersection just as the traffic light turns yellow. She knew that the yellow light lasts only 2s before turning red,and shi is 28m away from the near side of the intersection. Should she try to stop,or

asked on September 17, 2016
9. chemistry

If a solution containing 34.576 g of mercury(II) perchlorate is allowed to react completely with a solution containing 10.872 g of sodium sulfate, how many grams of solid precipitate will be formed?

asked on April 19, 2013
10. Trigonometry

The populations, P, of six towns with time t in years are given by: I) P=1000(1.08)^t II) P= 600(1.12)^t III) P = 2500(0.9)^t IV) P=1200(1.185)^t V) P=800(0.78)^t VI) P=2000(0.99)^t a. Which towns are growing in size? Which are shrinking? b. Which town is

asked on January 15, 2013
11. algebra

Generate the first five terms in the sequence using the explicit formula; Cn=12n-11 Please explain

asked on February 5, 2013
12. Social Studies

How were the economies of the Nothern and Southern states different? How were they the same?

asked on November 3, 2016
13. I need help, I'm stuck...what is the correct answe

The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 0 4 2 5 2 6 1 7 2 8 3 9 0 10 4 The mean score on this test is: 6.5 The median score on this test is: 7.5

asked on October 24, 2016
14. algabre

the speed of the current in a river is 6 mph a ferry operator who works that part of the river is looking to buy a new boat for his business everyday his route takes him 22.5 miles against the current and back to his deck and he needs this trip in a total

asked on January 24, 2013
15. Chemistry

Which of the following gases is the best choice for inflating a balloon that must remain inflated for a long period of time? a) argon b) hydrogen c) neon d) oxygen

asked on April 13, 2010
16. economics

Could someone check my work? Please When the government attempts to cover large deficits by creating more money, what is the probable result called? government borrowing hyperinflation (my choice) excess currency full employment 2. What is one of the major

asked on November 6, 2012
17. economics

can someone explain the relationship between consumer expectations and economic performance? Could use some help.

asked on October 31, 2012
18. algebra

what is the simpler form of the radical expressio. 4 sqrt 2401x^12y^16 I know its 7x^3y^4 but not sure if looks like 7[x^3[y^4 7x^3[y^4

asked on January 4, 2013
19. algebra

I have 3 questions I need help with. 1) what is the 15th term of the sequence 81,27,9,... 2) what is a possible value for the missing term of the geometric sequence 39,_,975,_ 3) what is the sum of the finite arithmetic series (-5)+0+5+10+..+65

asked on February 12, 2013
20. algebra

suppose the polynomial function below represents the power generated by a wind turbine where x represents the wind speed in meters per second and y represents the kilowatts generated interpret f(10) f(x)=0.08x^3+x^2+x+0.26

asked on November 12, 2012
21. algebra

What is the product in simpliest form state any restrictions on the variable x^2+7x+10 / x+3 times x^2-3x-18 / x^2+x+2 I got (x+5)(x-6) / x-1, not sure on restrictions either 1 or -3,-2, and 1

asked on January 30, 2013
22. algebra

what is the quotient in simpliest form state the restrictions on the variable z^2-4/z-3 divided z+2/z^2+z-12 i got z^2+2x-8 but am not sure of the restrictions maybe 3,-2

asked on January 30, 2013
23. Bus math

Bari Jay, a gown manufacturer, received an order for prom dresses from China. Her cost is \$40 a gown. If her markup based on selling price is 76%, what is the selling price of each gown?

asked on October 13, 2017
24. chemistry

Baking soda is sodium bicarbonate, NaHCO3, and vinegar is primarily acetic acid, HC2H3O2. When baking soda is added to vinegar, the resulting reaction produces a tremendous amount of gas, as shown in this video. Complete this equation for the reaction of

asked on April 19, 2013
25. algebra

Have a few questions can someone please help me figure them out? 1) You research the cost of a gallon of gasoline over several years to look for a trend. The table shows your data. What is a line of best fit for the data? Based upon these prices, how much

asked on January 3, 2013
26. algebra

Simplify the rational expression state any restrictions on the variable t^2+2t-24 / t^2-36 I got t-4 / t-6, but Im not sure of the restrictions whether its 6 or -6,6

asked on January 30, 2013
27. algebra

For the function f(x)=(7-8x)^2, find f^-1. Determine whether f^-1 is a function.

asked on December 10, 2012
28. Physics

In the series circuit, if the current through R1 is 1.5 A, what is the current through R2? 1. Unable to determine 2. 1.5 A 3. 1 A 4. 0.5 A 5. 3 A

asked on February 24, 2016
29. algebra

A biologist took a count of the number of migrating waterfowl at a particular lake, and recounted the lakes population of waterfowl on each of the next six weeks. Find the function that models the data as a function of x, the number of weekx. Use the model

asked on October 25, 2012
30. chemistry

Write the balanced chemical equation for the Habor-Bosch process, that is, the combination of nitrogen and hydrogen to form ammonia, NH3. Phase symbols are optional.

asked on April 17, 2013
31. algebra

A few more question Id like for someone to check please. 1) what are the vertex, focus, and directrix of the parabola with the given equation? x^2-8x-28y-124=0 vertex (4,-5) focus (0,7) directrix y=-12 2) write an equation of a circle with given center and

asked on February 22, 2013
32. algebra

identify the graph of 4+2i if someone could explain to me how you decide which way to go on the graph as far as imaginary and real axis

asked on November 3, 2012
33. statistics

Consider a binomial experiment with 20 trials and probability 0.45 on a single trial. Use the normal distribution to find the probability of exactly 10 successes. Round your answer to the thousandths place.

asked on August 2, 2011
34. algebra

please explain the step for this I have no idea. the speed of the current in a river is 6 mph a ferry operator who works that part of the river is looking to buy a new boat for his business everyday his route takes him 22.5 miles against the current and

asked on January 29, 2013
35. algebra

a hyperbola has vertices (+-5,0) and one focus (6,0) what is the standard form equation of the hyperbola.

asked on February 25, 2013
36. Language Arts

"Everyone is just walking along concerned with his own problems, his own life, his own worries. And we're just expecting other people to tune in to our agenda." Think about how this theme is developed through the character's words and actions in the novel.

asked on May 31, 2017
37. chemistry

A gas has a volume of 590mL at a temperature of -55.0C What volume will the gas occupy at 30.0C Can someone help me?

asked on January 31, 2013
38. algebra

Really need help with one problem. The table shows the annual consumption of cheese per person in the United States for selected years in the 19th century. What cubic model best fits this data? Year Pounds Consumption 1915 4.156 1922 4.857 1946 7.16 1991

asked on November 28, 2012
39. algebra

A parabolic microphone has a cross-section in the shape of a parabola. The microphone is placed at the focus of the parabola. If the parabola is 20 inches wide and 5 inches deep, how far from the vertex should the microphone be placed? Can someone please

asked on March 1, 2013
40. english

Has anyone read Kate Chopin is so could you check my answers? 1. When Mrs. Sommers leaves to go shopping, she forgets to take money. her daughter Mag’s size. her preferred store. to eat lunch.***** 2. The resolution of a story should build to the climax

asked on November 18, 2012
41. Algebra

Can someone please help me with a couple questions? 1)The probability that a dessert sold at a certain cafe contains chocolate is 73%. The probability that a dessert containing chocolate also contains nuts is 25%. Find the probability that a dessert at

asked on March 24, 2013
42. basic word & excel

6. _______ data updates in your destination document if there are changes to the source data. A. Linked B. Integrated C. Embedded D. Field

asked on December 12, 2017
43. Chemistry

Enough of a monoprotic acid is dissolved in water to produce a 0.0169 M solution. The pH of the resulting solution is 2.68. Calculate the Ka for the acid.

asked on April 21, 2012
44. algebra

Coulld someone take the time and check my answers please. 11) without graphing is the system independent, dependent, or inconsistent? y=-x+5 -3x-3y=-15 (my answer; dependent) 12) your club is baking vanilla and chocolate cakes for a bake sale. they need at

asked on January 3, 2013
45. algebra

what is the equation in standard form of a parabola that contain the following points? (-2,-20),(0,-4),(4,-20) Please Help

asked on October 29, 2012
46. algebra

You live near a bridge that goes over a river. The underside of the bridge is an arch that can be modeled with the function y=-0.000475x^2+0.851x, where x and y are in feet. How high above the river is the bridge(the top of the arch)? How long is the

asked on October 20, 2012
47. Basic Word and Excel

What would be a situation in which you could use an Excel chart to present your data? a.)determining what percentage of customer 101 buys product A, and what percentage of the same customer buys product B b)Compiling survey questions and answers from both

asked on December 5, 2017
48. chemistry

Balance the following redox reaction by inserting the appropriate coefficients. H^+ +CrO4^2- +NO 2^- =Cr^3+ +H2O+NO3^-

asked on April 19, 2013
49. algebra

Wind farms are a source of renewable energy found around the world. The power P(in kilowatts) generated by a wind turbine varies directly as the cube of the wind speed v(in meters per second) If a turbine generates 700kW in a 5m.s wind, how much power does

asked on January 4, 2013
50. history

Question: 8) What impact did the Columbian Exchange have on imperialism? A) The popularity of Columbian goo... 8) What impact did the Columbian Exchange have on imperialism? A) The popularity of Columbian goods throughout Europe built American empires. B)

asked on July 27, 2018
51. algebra

Write a recursive formula for the sequence formula 15,26,48,92,180,.. then find the next term. can someone please help me

asked on February 5, 2013
52. history

What led to the development of one-crop economies? A. Joint-stock companies found profitability in monopolizing one cash crop. B. One-crop economies were developed through slash-and-burn agricultural practices. C. Colonies sought to reduce costs by

asked on July 27, 2018
53. chemistry

N2 (g) + 3H2 (g) → 2NH3(g) ΔH = -92.2 kJ How much heat (in kJ) is released if 13.3 g of hydrogen is consumed to make ammonia? (Give your answer as a positive number, since you cannot release negative energy.)

asked on October 14, 2017
54. algebra

Robin bought a computer for \$1,250. It will depreciate, or decrease in value, by 10% each year that she owns it. a) Is the sequence formed by the value at the beginning of each year arithmetic, geometric, or neither? Explain. b) Write an explicit formula

asked on February 12, 2013
55. algebra

Rewrit the equation in vertex form. Name the vertex and y-intercept. y=3/5^2+30x+382 I need some help do not understand these type of problems.

asked on October 31, 2012
56. algebra

What is the expression in factored form? 2x^2+16x+24

asked on November 6, 2012
57. algebra

find an equation that models the path of a satelite if its path is a hyperbola, a=55,000km and c=81,000km assume that the center of the hyperbola is the origin and the tranverse axis is horizontal

asked on February 25, 2013
58. algebra

please explain the step for this I have no idea. the speed of the current in a river is 6 mph a ferry operator who works that part of the river is looking to buy a new boat for his business everyday his route takes him 22.5 miles against the current and

asked on January 29, 2013
59. books

Reread the nightmare scene near the end of The Night Thoreau Spent in Jail and describe the main characters and primary events in Henry’s nightmare. Also, discuss this scene in particular, and the play in general, as a work of protest against war itself.

asked on November 12, 2012
60. english

How would you briefly describe Poe's requirement for the short story genre?

asked on October 9, 2012
61. algebra

Can someone please help... a hyperbola has vertices (+-5,0) and one focus (6,0) what is the standard form equation of the hyperbola.

asked on February 27, 2013
62. algebra

What are the zeros of the function? what are their multiplicities f(x)=4x^3-20x^2+24x numbers -3,-2,and 0 are multiplicity of 1 numbers 3,2,and 0 are multiplicity of 1

asked on November 18, 2012
63. algebra

A conic section has the equation x^2+y^2+12x+8y=48. Determine the following; type of conic, domain and range, axes of symmetry, and center.

asked on March 1, 2013
64. algebra

What is the vertex form of the equation? y=-x^2+12x-4

asked on November 6, 2012
65. chemistry

Write the net ionic equation (including phases) that corresponds to Fe(ClO4)2(aq)+Na2S(aq)=FeS(s)+2NaClO4(aq)

asked on April 19, 2013
66. Math

A carton contains 1 8/9 liters of apple juice. Rosalia drinks 1/6 liter of the juice every day. How much apple juice is left in the carton after a week?

asked on December 9, 2014
67. Geometry

A red cross helicopter takes off and flies 75km at 20degree south of west. There it's drops off some relief supplies. It then flies 125 km at 10 degree west of north to pick up three medics. A. Make an accurate drawing of the two vectors decribed? B. draw

asked on March 10, 2015
68. Math

25% of my candies are chocolate candiea i had 25 chocolate candies. How many candies did i have altogether?

asked on November 17, 2015
69. algebra

Can someone help with inverse relations and functions? is relation t a function? Is the inverse t a function? chart looks like: x 0 2 4 6 y -10 -1 4 8 If someone could please explain this problem

asked on December 10, 2012
70. Physics

A particle leaves the origin with a velocity of 7.2 m/s in the positive y direction and moves in the xy plane with a constant acceleration of (3.0 – 2.0 ˆi ˆj ) m/s2. At the instant the particle moves back across the x axis (y = 0), what is the value

asked on September 29, 2008
71. agebra

Can someone please help me.. find an equation that models the path of a satelite if its path is a hyperbola, a=55,000km and c=81,000km assume that the center of the hyperbola is the origin and the tranverse axis is horizontal

asked on February 27, 2013
72. Math

A community center has 3 tennis teams and 5 basketball teams. No one is on both teams. How many athletes are there? Tennis---2 players Basketball---5 players Softball---10 players

asked on February 11, 2013
73. algebra

how can you write the expression with rationalized denominator? 2+3sqrt3/3sqrt6

asked on January 4, 2013
74. math

calculate the resistances of (a) 100-watt 120-volt incandescent lamp, (b) a 750-watt 115-volt toaster, (c) a 1300 watt 110-volt portable iron.

asked on August 24, 2014
75. algebra

Can anyone help explain how to work this problem out? One factor in flood safety along a levee is the area that will absorb water should the levee break. the coordinates that make up the boundry area are (0,0),(2.8,2.1)and(4.3,4.4) what is the area of the

asked on April 2, 2013
76. algebra

What is a quartic function with only the two real zeroes given? x=-1 and x=-3 Would someone please explain

asked on November 26, 2012
77. Organic Chemistry

Consider the crystallization of sulfanilamide from 95% ethyl alcohol. If impure sulfanilamide is dissolved in the minimum amount of 95% ethyl alcohol at 40°C rather than 78°C (the boiling point of ethyl alcohol), how would this affect the percent

asked on September 8, 2015
78. Math and exopents

Given w = 10. w + w (12 - 2*2 * 3) * 7? Can some one help? the answers are: 73 12 6 3 but none of my calculations are 73, 12, 6 or 3 :(

asked on September 6, 2015
79. Poetry

What is rhyme scheme? (1 point_ The stressed and unstressed syllables within a poem a type of poetry that has no rhyme, but no rhythm (or patter of lines that rhyme within a poem) a poem that has a rhyming meter a poem consisting of ten syllables I think

asked on September 24, 2015
80. algebra 2

you are making gift baskets.each basket will contain three different kinds of candles: tapers,pillars, and jar candles. Tapers cost \$1 each, pillars cost \$4 each, and jar candles cost \$6 each. You put 8 candles costing a total of \$24 in each basket, and

asked on October 14, 2009
81. algebra

Skip designs tracks for amusement parks. For a new design the track will be ellipitical if the ellipse is placed on a large coordinate grid with its center at (0,0) the equation x^2/2500+y^2/8100=1 model the path of the park.The units are given in yards,

asked on March 1, 2013
82. algebra

Archers need to use arrows that do not bend easily. The table shows how the weight of an arrow affects its spine or the distance the center of the arrow bends when a certain constant weight is attached. Graph the data in the table to find a linear and

asked on January 8, 2013
83. algebra

Suppose a parabola has a vertex (-4,7) and also passes through the point (-3,8) Write the equation of the parabola in vertex form. f(x)=a(x-h)^2+k I believe h=-4 k=7 Not sure what to do from here.

asked on October 29, 2012
84. Calc

A sample of a radioactive substance decayed to 93.5% of its original amount after a year. a) What is the half-life of the substance? ? years (b) How long would it take the sample to decay to 10% of its original amount? ? years

asked on November 8, 2009
85. Cal 1

The top and bottom margins of a poster are each 12 cm and the side margins are each 8 cm. If the area of printed material on the poster is fixed at 1536 cm^2, find the dimensions of the poster with the smallest area.

asked on December 8, 2010
86. math

Assignment 1 Chapter 11. Data Analytics (p. 332) 38. Refer to the Baseball 2016 data, which report information on the 30 Major League Baseball teams for the 2016 season. A. At the .05 significance level, can we conclude that there is a difference in the

asked on May 26, 2019
87. physics

If an atom has an electron in the n = 5 state with ml = 3, what are the possible values of l?

asked on November 24, 2014
88. algebra

The table shows the amount of milk that wisconsin dairy farms produced from 1939 to 1962 which linear model best fits this data? year milk produced(in billions of lbs 1939 12 1962 15 2005 21

asked on January 4, 2013
89. algebra

what is a quartic function with only the two real zeros given x=5 and x=1 y=-x^4-6x^3+6x^2-6x+5 y=x^4+6x^3-6x^2-5 y=x^4-6x^3+5x^2-6x+6 y=x^4-6x^3+6x^2-6x+5 can someone explain

asked on November 14, 2012
90. basic word and excel

_______ data would be useful for creating a weekly status report for your manager that should reflect changes in real time. A. Field B. Integrated C. Linked D. Embedded

asked on December 13, 2017
91. Chemistry

The Ksp values of BaSO4 and SrSO4 are 1.1x10^-10 and 3.8x10^-7 respectively. Calculate the concentrations of Ba2+, Sr2+, and SO4 2- in a solution that is saturated with BaSO4 and SrSO4.

asked on November 18, 2014
92. physics

A child has a temperature of 101◦F. If her total skin area is 13 m2, find the en- ergy loss per second due to radiation, assum- ing the emissivity is 1. The Stefan-Boltzmann

asked on October 21, 2012
93. algebra

Identify the maximum or minimum value and the domain and range of the graph of the function y=2(x-3)^2-4 Can someone please help me.

asked on October 17, 2012
94. calculus

the curve with equation 2(x^2+y^2)^2=9(x^2-y^2) is called a lemniscate. find the points on the lemniscate where the tangent is horizontal.

asked on October 30, 2011
95. Geology

Which of the following is consistent with the plate tectonic theory? Which of the following is consistent with the plate tectonic theory? A. Lithosphere convection drives mantle movement. B. As a plate sinks into the asthenosphere, it pulls the trailing

asked on October 16, 2016
96. algebra

You throw a rock off the balcony overlooking your backyard the table shows the height of the rock at different times use quadratic regressin to find a quadratic model for this data. time 0 1 2 3 4 5 height 24 44.2 54.8 55.8 47.2 29 would someone explain

asked on October 29, 2012
97. algebra

a polynomial equation with rational coefficients has the roots 7+sgrt3, 2-sgrt6 find two additional roots 7-sgrt3, 2+sgrt6 3-sgrt7, 6+sgrt2 7+sgrt3, 2-sgrt6 3+sgrt7, 6=sgrt2 could someone help

asked on November 14, 2012
98. Physics

Police find skid marks 180 meters long on a highway where a car made an emergency stop. Assuming that the deceleration was a = 10 m/s¶ (about the maximum for dry pavement), how fast was the car traveling before the brakes were applied?

asked on November 14, 2013
99. english

How would you briefly describe what the lerary movement Romanticism valued?

asked on October 9, 2012
100. College algebra

A person is driving a car on a straight road. The graph shows the distance in y miles that the individual is from home after x hours. the graph has the following points (1, 40) and (3, 90) Find the slope intercept of the line y = ____x + ______ How fast is

asked on December 6, 2010