Popular questions and responses by megan
  1. Algebra

    Walking Speed The avg. walking speed R of a person living in a city of population P in thousands is modeled by the function R(P)=0.37 times ln P + 0.05. where R is in feet per second. The populatin of Boston is 532,000, find the average walking speed of

    asked on June 23, 2015

    A doctor wants to estimate the HDL cholesterol of all 20-29 year old females. How many subjects are needed to estimate the HDL cholesterol within 2 points with 99%confidence assuming s=17.8 based on earlier studies? Suppose the doctor would be content with

    asked on May 5, 2013
  3. Reading

    1) Identify the dependent clause in this sentence: The mother dog left her bed as soon as the puppies were asleep. a) As soon as the puppies were asleep b) Left her bed as soon as c) The puppies were asleep d) The mother dog left her bed 2) Which sentence

    asked on October 4, 2017
  4. chemistry

    For each trial, enter the amount of heat gained by the chemical system of ammonium nitrate, qrxn. The specific heat of water is 4.184 J/goC. Report your answer using 4 digits. The information given is: Trial # Tiwater Tf Masswater #1: 21.2 10.8 24.990 #2:

    asked on April 6, 2010
  5. Advanced Functions

    the ferris wheel at an amusement park measures 16m in diameter. the wheel does 3 rotations every minute. the bottom of the wheel is 1m above the ground... a) determine the simplest equation that models Megan's height above that ground(h) over time (t).

    asked on March 5, 2017
  6. Physics

    Two identical cars (m = 1350 kg) are traveling at the same speed of 28.1 m/s. They are moving in the directions shown in the drawing. What is the magnitude of the total momentum of the two cars?

    asked on October 1, 2013
  7. comsumer math

    9. Your fixed expenses are $1,151.65/month. You saved 4 months' worth in an emergency fund, investing 25% in a savings account at a 3.3% APR and the rest in a 60­day CD at a 4.3% APR. How much total interest accrues over 60 days? (1 point) $ 10. What is

    asked on March 2, 2017
  8. English

    A house down the street and the duplex next door __________ for sale, but the prices __________ too expensive for most people to afford. A is; seem B. are; seems C. is; seems D. are; seem

    asked on November 17, 2016

    a policeman is pursuing a snatcher who is ahead by 72 of his own leaps. the snatcher takes 6 leaps while the cop takes 5 leaps, but 4 leaps of the snatcher are as long as 3 leaps of the cop. how many leaps will the cop make before he catches the snatcher?

    asked on June 20, 2015
  10. Physics

    A rock is thrown directly upward from the edge of the roof of a building that is 40.2 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown. Neglect any effects of air resistance.

    asked on April 8, 2016


    asked on June 20, 2015
  12. algebra

    A mortgage broker purchased two trust deeds for a total of $290,000. One trust deed earns 9% simple annual interest, and the second one earns 12% simple annual interest. If the total annual interest from the two trust deeds is $31,500, what was the

    asked on April 20, 2016
  13. Calculus

    A storage tank used to hold sand is leaking. The sand forms a conical pile whose height is twice the radius of the base. The radius of the pile increases at the rate of 2 inches per minute. Find the rate of change of volume when the radius is 5 inches.

    asked on November 23, 2011
  14. Chemistry

    Given the following three electron configurations: 1s2 2s2 2p5 How many core electrons does this element have? A. 4 B. 5 C. 9 D. 2

    asked on July 10, 2016
  15. stats

    The mean tax-return preparation fee H&R Block charged retail customers last year was $183 (The Wall Street Journal, March 7, 2012). Use this price as the population mean and assume the population standard deviation of preparation fees is $50. Round your

    asked on June 26, 2015
  16. Chemistry

    Assuming equal concentrations and complete dissociation, rank these aqueous solutions by their freezing points. CoCl3 K2CO3 KNO3

    asked on January 29, 2015
  17. Math

    Expand (2x+5y)^6

    asked on May 12, 2011
  18. physics

    Sheena can row a boat at 3.13 mi/h in still water. She needs to cross a river that is 1.10 mi wide with a current flowing at 1.75 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream. (a) What is

    asked on September 8, 2013
  19. math

    A rectangle is 4 inches longer than it is wide and has an area of 165 square inches. Find its dimensions

    asked on September 25, 2012
  20. math check answers

    For questions 3 and 4, you will be answering by filling in the blank. Please be aware that your answer must include any commas or decimals in their proper places in order to be correct. The dollar signs have been provided. For example, if the answer is

    asked on February 10, 2017
  21. Loan

    In a loan database, there are 60 loans to clients with 18 years of business experience. Also, there are 23 loans made to clients with a High School education. In the database there are 68 loans to clients with 18 years of experience or who have a High

    asked on October 8, 2016
  22. Grammar

    1. He tried to remember that names of all the people_________ were there that night. a. Whom b. That c. Whose d. Which 2. A synonym is a word _________ a meaning similar to another word. a. Who have b. That have c. Who is having d. Having 3. After having

    asked on October 4, 2017
  23. Language Arts

    according to "happiness is a charming charlie brown at orlando rep,) how do the technical aspects of the play compare with the performers? A) they do not achieve the same quality B) they are equally as good C) they overshadow them D) they are much more

    asked on May 8, 2017
  24. science

    What order is the radioactive decay of carbon-14, an unstable isotope of carbon? A. Third order B. Second order C. Zero order D. First order

    asked on August 18, 2016
  25. calculus

    The monthly sales S (in hundreds of units) of baseball equipment for an Internet sporting goods site are approximated by S = 60.1 − 43.9 cos πt/ 6 where t is the time (in months), with t = 1 corresponding to January. Determine the months when sales

    asked on July 11, 2016
  26. Math

    Have you ever been on an airplane and heard the pilot say that the plane would be a little late because it would be flying into a strong headwind or that even though the plane was taking off a bit late, you would be making up time because you would be

    asked on March 22, 2017
  27. Chemistry

    Which of the following atoms would have the highest first ionization energy? A. Li B. Be C. Na D. Mg

    asked on July 10, 2016
  28. Physics

    The two masses shown in the figure are each initially 1.80 m above the ground, and the massless frictionless pulley is fixed 4.8 m above the ground. (mA = 1.5 kg and mB = 3.4 kg.) What maximum height does the lighter object reach after the system is

    asked on September 21, 2014
  29. Physics- Someone Please Help!!!

    A 60.00 cm guitar string under a tension of 46.000 N has a mass per unit length of 0.11000 g/ cm. (a) What is the speed of the wave? (b) What is the fundamental wavelength for this string? (c) What is the fundamental frequency for this string? (d)What is

    asked on December 3, 2012
  30. physics

    A rocket of mass 4.50 105 kg is in flight. its thrust is directed at an angle of 64.0° above the horizontal and has a magnitude of 7.50 106 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the

    asked on November 20, 2010
  31. math

    at the veterinarian's office terri learned that her dot weighed 4 times as much as her cat. together the pets weighed 40 lbs. how much did the dog weigh

    asked on June 22, 2010
  32. English

    1. An apartment is advertised as being furnished. What does this mean? a. The first month’s rent must be paid in advance b. It is equipped with articles c. It has just been repainted d. The utility bills are included in the rental cost. c

    asked on October 5, 2017
  33. english 101

    select your answer? Jf Kennedy was a senator before he --- -- president in 1960. Has elected/was electing/was elected/elected my answer is was elected

    asked on February 21, 2017
  34. MATH

    WHAT IS 23.25 ROUNDED TO Im confused but I think it can stay the same or to 30

    asked on December 16, 2016
  35. science

    Which of the following is an example of heterogeneous catalysis? A. Ethylene and hydrogen gases are adsorbed onto the surface of a metal catalyst to accelerate the formation of ethane. B. An enzyme catalyzes a biochemical reaction that produces the alcohol

    asked on August 18, 2016
  36. chemistry

    Write the net ionic equation for the following molecular equation. HNO3 is a strong electrolyte. NaNO2(aq) + HNO3(aq)--> NaNO3(aq) + HNO2(aq) HNO2 is a weak electrolyte.

    asked on September 27, 2015
  37. history

    Can someone please help me? :) 1. Which of the following best describes the beliefs of Andrew Jackson? (1 point) States’ rights should be exercised over federal law. Federal funds should be kept in a national bank. The nation should have a strong federal

    asked on January 7, 2014
  38. Chemistry

    Write a net ionic equation for the reaction that occurs when aqueous solutions of hydroiodic acid and barium hydroxide are combined.

    asked on October 8, 2012
  39. science

    Imagine that you are riding a bus. A girl gets on, and you recognize her as someone you know but have not seen for two years. 1. What are the roles of the central nervous system and the peripheral nervous system in allowing you to recognize the person and

    asked on February 18, 2011
  40. Physics

    Two blocks are arranged as shown. The pulley can be considered to be massless, and friction is negligible. M1 is four times more massive than M2. M1--->0(Pulley) V V (down direction) V M2 If the system is released from rest, how far will M1 travel in 0.523

    asked on January 27, 2011
  41. English

    1. As the leader of group, the charge nurse is open to new ideas and thoughts of the group. The charge nurse encourages the group to participate in making decisions. This type of leadership is called a. Direct b. Laissez-faire c. Autocratic d. Democratic

    asked on October 5, 2017
  42. calculus

    Find the exact value of the given expression. (tan17pi/12 - tan pi/4) / (1+tan 17pi/12 tan pi/4) can you help with this? i got the answer 1/ squareroot 3

    asked on July 11, 2016
  43. Calculus

    The consumer demand equation for tissues is given by q = (97 − p)2, where p is the price per case of tissues and q is the demand in weekly sales. (a) Determine the price elasticity of demand E when the price is set at $26. (Round your answer to three

    asked on October 28, 2015
  44. math

    John and Mary Billings own a condominium with an assessed value of $110,000. If the tax rate is 25 mills per $1.00 of assessed valuation, how much tax do they pay?

    asked on June 24, 2014
  45. Statistics

    A researcher wishes to estimate the proportion of adults who have high-spped internet access. What size sample should be obtained if she wishes the estimate to be within .02 with 90% if A) She uses a previous estimate of 0.48? B) She does not use any prior

    asked on May 5, 2013
  46. Chemistry

    Calculate the moles of hexane required to form 150 g of carbon dioxide. Please show all working. Thank you.

    asked on February 12, 2012
  47. Precalculus

    2sin^2x+3cosx=3 find all solutions in the interval [0,2pi]

    asked on December 8, 2010

    A nuclear reactor contains nuclei that fission when bombarded by slow neutrons. The fission reaction produces fast neutrons which need to be moderated (i.e. slowed down) in collisions before they can cause further fissions. In this problem we consider a

    asked on March 28, 2011
  49. Chemistry

    H2(g) + I2(g) 2 HI(g) The forward reaction above is exothermic. At equilibrium, what happens if I2 is removed from the reaction mixture at constant temperature and volume? The reaction absorbs energy. The reaction releases energy. [H2] increases. [H2]

    asked on September 19, 2010
  50. College Physics

    A boy of mass 64.1 kg is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 7 m above the net. The firefighters lower their arms as he lands in the net so that he is brought to a complete stop in a time of

    asked on October 15, 2009
  51. Pre Calc

    Use the Leading Coefficient Test to determine the end behavior of the polynomial function. f(x)=-3x^3-3x^2-2x+1 ?????????????

    asked on August 26, 2009
  52. Chemistry

    For each of the following unbalanced equations, suppose that exactly 15.0g of each reactant is taken. Determine which reactant is limiting, and calculate what mass of each product is expected. assume the limiting reactant is completely consumed.

    asked on February 16, 2009
  53. Science

    A farmer bought a 50kg of fertilizer with an inscription NPK 15:15:15. (a) what is the name of the fertilizer? (b) name 3 nutrients the fertilizer can supply to the soil. (c) what is the percentage of the actual nutrients in the 50kg bag of the fertilizer?

    asked on May 22, 2020
  54. algebra


    asked on December 3, 2017
  55. algebra

    A Spanish class has a total of 46 students. The number of females is 14 less than the number of males. How many males and how many females are in the class?

    asked on June 15, 2017
  56. Math

    How many 3 letter security codes can be made from the 4 letters A,B,C,D? For example , BAB, and ABB, are two such codes, and DAC is another. Explain

    asked on April 21, 2017
  57. science

    How would the fraction of successful collisions change with an increase in reaction temperature? A. The fraction of successful collisions would decrease. B. The fraction of successful collisions would remain unchanged. C. The fraction of successful

    asked on August 18, 2016
  58. Chemistry

    The equation for fermentation of glucose to alcohol and carbon dioxide is C6H12O6= 2C2H5OH + 2CO2 The enthalpy for the reaction is -67kj. Is the reaction endothermic or exothermic? Is the heat energy absorbed or released as the reaction occurs? I think its

    asked on April 20, 2016
  59. MATH

    1.) which order pair would be plotted y starting from the origin and moving 0.25 units left and then 3 units up?

    asked on April 18, 2016
  60. earth science

    briefly explain how earths atmosphere heated? Energy is transferred between the earth's surface and the atmosphere via conduction, convection, and radiation. Conduction is the process by which heat energy is transmitted through contact with neighboring

    asked on November 5, 2015
  61. math

    A small grill can hold two hamburgers at a time. If it takes 5 minutes to cook one side of a hamburger, what is the shortest time needed to cook both sides of five hamburgers? 30 15 20 25

    asked on May 6, 2013
  62. Physics URGENT!!!

    A 75.0 kg fullback running east with a speed of 6.00 m/s is tackled by a 82.0 kg opponent running north with a speed of 5.00 m/s. (a) Calculate the velocity of the players immediately after the tackle. (b)Calculate the direction of the players immediately

    asked on October 17, 2012
  63. Physics HELP!

    An ant and a beetle are riding a spinning record on a record player. The ant stands on the outside edge of the record while the beetle stands on the record's label. The ant is four times as far from the center of rotation as the beetle. What is the ratio

    asked on June 3, 2012
  64. BioChem

    Write the chemical equation for the reaction that occurs when you add NaOH solution to NaH2PO4/Na2HPO4 buffer solution

    asked on March 23, 2012
  65. Geometry Are these two triangles similar? Thanks!

    Are these two triangles similar? How do you know? There are two triangles HMG and JMK They are connected at the top point at M H is on the bottom left, G is on the bottom right, and M is at the top for triangle HMG For triangle JMK J is on the bottom right

    asked on February 20, 2012
  66. Physics

    How can one find the magnitude and the directions of a resultant if Vector A is 35N @ 60' NE, and Vector B is 50N @ 20' NW?

    asked on December 4, 2011
  67. Physics-Need Help fast!

    Part 1 A 3m long pipe is in a room where the temperature is 20 degrees C. What is the frequency of the first harmonic if the pipe is closed at one end? Part 2 sound traveling in air at 23 degrees C enters a cold front where the air temp is 2 degrees C. If

    asked on July 27, 2011
  68. physics

    Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in Figure P5.64. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.25.

    asked on March 3, 2011
  69. Chemistry

    Experiment 10: Which Fuels provide the most heat? There are many possible sources of error in this experiment. List three that you can think of. Would each error have a large effect, a medium effect, or a small effect on the calculated heat content of a

    asked on October 7, 2010
  70. chemistry

    2 NO2(g) N2(g) + 2 O2(g) The ΔH° for the reaction above is -66.4 kJ. The system is initially at equilibrium. What happens if N2 is added to the reaction mixture at constant temperature and volume? The reaction absorbs energy. The reaction releases

    asked on September 19, 2010
  71. Medical Physics

    A block is acted on by a force that varies as (2.8*10^4 N/m)x for 0

    asked on October 2, 2009
  72. Physics

    Two blocks are connected by a lightweight, flexible cord that passes over a frictionless pulley. If m1 is 3.4 kg and m2 is 9.1 kg, and block 2 is initially at rest 130 cm above the floor, how long does it take block 2 to reach the floor?

    asked on September 23, 2009
  73. Algebra HELP!

    Consider the function h as defined. Find functions f and g so (f o g)(x)=h(x) h(x)=8/x^2+10 I think it is: h(x)=8/x^2+10 h(x)=8/x^2+10*x^2/x^2 h(x)=8/x^2+10x^2/x^2 h(x)=8+10x^2/x^2 h(x)=10x^2+8/x^2 h(x)=2(5x^2)+2(4)/x^2 h(x)=2(5x^2+4)/x^2

    asked on March 28, 2008
  74. MATH!

    graph the following system of inequalities on the accompanying set of axes and label the solution S. y>x-4 i got this one. but how would you graph y+x> or = to 2. How do you find the slope and y intercept? Change it to read (subtract x from both sides y>-x

    asked on May 13, 2007
  75. Calculus

    The nth term of a sequence is represented by 2n^4+25n^2+32n−15 ____________________ 6n^4+2n^3−11n^2−2n+17. What is the limit of the the nth term as x becomes increasingly large? A)0 B)1/3 C)3 D)The limit does not exist.

    asked on May 19, 2020
  76. chemistry

    2A + 3B + C ⟶ D + E The rate constant for this reaction is 0.25, and the reaction is second order in A and is first order in B and C. Which option correctly gives the rate of the reaction if [A] is 0.4 M, [B] is 0.1 M and [C] is 0.2 M? 5.0 × 10–4 8.0

    asked on February 24, 2020
  77. english 101

    choose the best word? If they----that the weather was going to be so bad, they wouldn’t have gone to the beach. Were knowing/had known/known/knew my answer is known

    asked on February 21, 2017
  78. Physics

    In a chase scene, a movie stuntman runs horizontally off the flat roof of one building and lands on another roof 2.0 m lower. If the gap between the buildings is 4.8 m wide, how fast must he run to cross the gap?

    asked on April 8, 2016
  79. Prealgebra

    Find the surface area of the prism. Round to the nearest tenth if necessary. The three sides are all 8.1 inches, the area of the base is 28.4 inches^2, and 12 inches is the length. It's a,b,c, or d. A. 348.4 in^2 B. 320 in^2 C. 291.6 in^2 D. 251.2 in^2

    asked on April 24, 2015
  80. chemistry

    The enthalpy of formation of MX is ΔHf° = –493 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 143 kJ/mol. The ionization energy of M is IE = 437 kJ/mol. The electron affinity of X is ΔHEA = –317 kJ/mol. (Refer to the hint). The bond energy of

    asked on March 16, 2015
  81. AP Chem

    solid (NH4)2CO3 is placed in an evacuated container at 115C. When equilibrium is reached the total pressure inside the vessel is 0.473 atm. Some solid remain in the vessel at equilibrium. Calculate Kp.

    asked on October 28, 2014
  82. Math

    In a parking lot 16% of the cars are blue. There are 4 blue cars in the lot. How many cars are not blue? 4x100=400\16= 25 then minus 4 blue cars to get the answer that 21 of the cars are not blue. I know the answer is 21 I'm just not sure if the work is

    asked on October 5, 2014
  83. math

    a ship leaves a port at 6 am traveling due east at 12mph. another ship leaves a port 11 am traveling due north at 15 mph. how far apart are they at 11pm to the nearest tenth mile?

    asked on July 5, 2013
  84. Calculus

    A rectangle in the first quadrant has one vertex as the origin, and other vertex on the curve y= -x^2 -2x +4. If the rectangle has one side lying on the x-axis, find the largest possible area of the rectangle.

    asked on May 5, 2013
  85. math

    (-32)-s (-9) I am not good at algebra. I am supposed to use the distributive property, but not sure where to begin.

    asked on February 4, 2013
  86. Chemistry

    Enthalpy changes: H2O2(l) ----> H2O(l) + 1/2P2(g) delta H= -94.6kJ H2(g) + 1/2O2(g)----> H2O2 delta H= -286.0kJ Calculate the value on delta H for the reaction: H2(g) + H2O2(l)----> 2H2O(l)

    asked on May 19, 2012
  87. Chemistry

    Determine the grams of hexane that will react exactly with 22 g of oxygen. Show all working please. Thank you.

    asked on February 12, 2012
  88. geometry

    what is the slope of the line determined by the equation 2x+y=5?

    asked on November 8, 2011
  89. Managerial Economics

    Assume the only choice variable is total benefit function is B(x) = 170x-x², and cost function is C(x) = 100-10x + 2x². a. What are the marginal benefit and marginal cost functions? b. Set up the net benefit function and then determine the level x that

    asked on May 25, 2011
  90. geometry

    A right circular cylinder has an altitude of 11 feet and a radius of 5 feet. What is the lateral area, in square feet, of the cylinder, to the nearest tenth?

    asked on April 3, 2011
  91. Physics please help!!

    A school yard teeter totter with a total length of 5.46 m and a mass of 35.9 kg is pivoted at its center. A 17.7 kg child sits on one end of the teeter totter. Where should a parent push with a force of 272 N in order to hold the teeter totter level?

    asked on March 4, 2011
  92. math (8th grade)

    The length of each piece in a model train railroad built on the HO scale is 1/87 of the actual length. Another popular model is the N scale, for which the scale is 1/160. Each car on a full-size passenger train is 80ft long. What is the length in inches of

    asked on February 10, 2011
  93. Physics please help!!

    If a woman lifts a 19.3 kg bucket from a well and does 6.10 kJ of work, how deep is the well? Assume that the speed of the bucket remains constant as it is lifted

    asked on February 7, 2011
  94. Physics please help!!

    A man with mass m =96.4 kg (weight = 212.1 lbs is walking towards a patio at 2.00 m/s (4.47 mph) when, at the last moment, he realizes the sliding glass door is closed. He puts out his hand suddenly to stop himself, and comes to a halt in 90.0ms. Find the

    asked on January 27, 2011
  95. 9th grade

    at 20 degrees celsius, how much sodium chloride could be dissolved in 2 L of water?

    asked on December 7, 2010
  96. Physics

    Water is moving with a speed of 5.0 m/s through a pipe with a cross-sectional area of 4.2 cm2. The water gradually descends 8.2 m as the pipe increases to 9.0 cm2. (a) What is the speed at the lower level? (b) If the pressure at the upper level is 1.8 ×

    asked on November 7, 2010
  97. Human Biology

    For a portion of Junior year next year, we're supposed to build a human skeleton out of anything we can find. So most people build them out of styrofoam or clay. Do you think building a skeleton out of twigs would be creative and/or relatively easy?

    asked on June 24, 2010
  98. Chemistry

    Which of the following electron configurations represent an excited state? 1s22s22p1 1s22s22p63s2 1s1 1s22s12p63s1 1s12s22p63p3 1s22s22p23d1 1s22s22p64s1

    asked on April 1, 2010
  99. Chemistry

    A 5.80 g sample of SiH4 and an excess of oxygen were placed in a reaction container surrounded by 3.40 kg of water. The initial temperature of the water was 14.10°C. At the end of the reaction, the temperature of the water was 48.90°C. Assume the heat

    asked on March 8, 2010
  100. college

    TiO2(s) + H2(g) Ti(s) + H2O(g) (a) Consider the unbalanced equation above. What is the maximum mass of titanium that can be produced when 2.65 g of TiO2 and 3.40 g H2 react? = ?g Ti (b)Assume the reaction in part (a) goes to completion. Calculate the mass

    asked on February 28, 2010


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