Popular questions and responses by aaron
  1. Calc

    The rate (in mg carbon/m3/h) at which photosynthesis takes place for a species of phytoplankton is modeled by the function below, where I is the light intensity (measured in thousands of foot-candles). P = (120 I) / (I^2 + I + 1) For what light intensity

    asked on November 30, 2009
  2. Math

    Tiffany purchased a $10,000, 13-week Treasury bill that's paying 2.25%. What is the effective rate on this T-bill? A. 2.26% B. 2.2% C. 2.0% D. 2.7%

    asked on January 5, 2015
  3. Pre Cal 12

    A 12cm by 8cm rectangular piece of metal is to be made into an open-top box by cutting a sqaure from corner and folding up the resulting flaps (sides). If the volume of the lidless box is 36 cm what are the integer dimensions of the box?

    asked on January 26, 2017
  4. Chemistry

    -Calcium chloride contains calcium and chloride ions. Write the ground-state electron configuration for the calcium ion. -Write the ground-state electron configuration for the chloride ion.

    asked on November 21, 2017
  5. Algebra I

    volume of a basketball is 448.9 cubic inches. with the formula V=4/3(pie)radius(cubed) for the volume of the ball, find the radius of the basketball

    asked on January 20, 2014
  6. Geometry

    There are three points on a line, A, B, and C, so that AB = 12 cm, BC = 13.5 cm. Find the length of the segment AC . Give all possible answers.

    asked on November 10, 2017
  7. Chemistry

    In which pair(s) would boiling occur? (Each pair corresponds to one row of the table) a. 760 {mm,Hg} 700 {mm, Hg} b. 480 {torr} 480 {mm, Hg} c. 1.20 {atm} 912 {mm, Hg} d. 1020{mm,Hg} 760 {mm, Hg} e. 740 {torr} 1.00 {atm}

    asked on May 17, 2010
  8. physics

    An ostrich can run at speeds of up to 72 km/h. How long will it take an ostrich to run 1.5 km at this top speed?

    asked on September 7, 2009
  9. physics

    Grant accelerates a 1kg ball 5.0m/s2 horizontally. The vertical acceleration of the ball is zero. The force of gravity is the only external force acting on the ball other than the forces Grant exerts on it. a-How large is the horizontal force grant exerts

    asked on March 1, 2015
  10. Math

    Jill traveled to Canada and bought a new lamp for $460 Canadian dollars. In U.S. dollars (to the nearest cent) this is equivalent to

    asked on December 28, 2014
  11. Programming concepts

    Develop a menu-driven program that inputs two numbers and, at the user’s option, finds their sum, difference, product, or quotient. top-down modular approach and pseudocode to design a suitable program to solve it. I am having so much trouble with this I

    asked on August 1, 2014
  12. Calculus theory

    Determine if the statement is always true, sometimes true, or never true. If y is a function of x, and is also a function of t. then dy/dx = dy/dt explain. i think its sometimes true but i don't know why it is. am i right?, and can you please explain me y

    asked on March 1, 2012
  13. English

    Identify the sentence pattern used below. I e-mailed my English Teacher my essay. My answer is subject verb

    asked on October 8, 2014
  14. Math

    1) The hypotenuse of an isosceles right triangle is 8 cm longer than either of its legs. Note that an isosceles right triangle is a right triangle whose legs are the same length. Find the exact length of its legs and its hypotenuse. 2) The length of a

    asked on November 18, 2013
  15. Chemistry

    Write the element symbol and charge for this monatomic ion: Consider a monatomic ion that has the electron configuration of [Kr]4d^10 5s^2 and a charge of 2+

    asked on November 21, 2017
  16. Geometry

    Point J is between H and K on line segment HK. use th given information to write an equation in terms of x. Solve the equation. Then find HJ and JK. HJ=(x/4) JK= 3x - 4 KH = 22

    asked on September 1, 2014
  17. algebra 2

    Find two negative numbers such that the sum of their squares is 170 and twice the square of the first minus 3 times the square of the second is 95

    asked on April 15, 2013
  18. statistics math

    The unemployment rate is 5.8% (Bureau of Labor Statistics, April 3, 2003). Suppose that 100 employable people are selected randomly. 1)What is the probability that exactly six people are unemployed (to 4 decimals)? 2)What is the probability that exactly

    asked on October 18, 2009
  19. physics

    You're in an airplane that flies horizontally with speed 860 km/h (240 m/s ) when an engine falls off. Neglecting air resistance, assume it takes 26 s for the engine to hit the ground. Hight of airplane is: H = 3.3 km horizontal distance that the aircraft

    asked on October 12, 2018
  20. Algebra

    1. Find all the real square roots of a. .0064 b. - .0081

    asked on March 5, 2017
  21. Algebra

    What is the equation, in standard form, of a parabola that models the values in the table x (-2,0,4) F(x) (2.5,1.5,-60.5)

    asked on January 10, 2017
  22. Math

    What point maximizes the objective function P = 4x + 3y for the constraints below. What is the maximum value? Constraints: x>=0 y>=0 y=y

    asked on October 13, 2016
  23. Goverment

    Which of the following was one compromise related to the Declaration of Independence that was agreed to by the delegates to the second continental congress? Language condemning the slave trade was removed Language criticizing the English people was

    asked on August 17, 2016
  24. math

    Hamid will be x years old 7 years from now. How old was he 7 years ago? (Your answer should include x.)

    asked on March 17, 2018
  25. algebra

    The length of a rectangle is 2 1/2 times the width, and the perimeter is 42 feet. What are the dimensions of this rectangle?

    asked on April 6, 2017
  26. math

    For an 18 month period, the last term is and the series sum is . For a 24 month period, the last term is and the series sum is . For a 30 month period, the last term is and the series sum is .

    asked on December 6, 2016
  27. Physics

    Figure shows a circular wire loop of radius r carrying current i placed in a perpendicular magnetic field B. Suppose that the radius of cross section of the wire is a. Find the decrease in radius of loop when magnetic field is switched off if Young’s

    asked on September 28, 2016
  28. math

    The mean of 14 numbers is 50. Removing one of the numbers causes the mean to decrease to 43. What number was removed?

    asked on March 23, 2016
  29. physics

    A cat is chasing a mouse. The mouse runs in a straight line at a speed of 2.2 m/s. If the cat leaps off the floor at a 29° angle and a speed of 4.0 m/s, at what distance behind the mouse should the cat leap in order to land on the poor mouse?

    asked on November 4, 2015
  30. science

    What is the coeffitient of friction for a playground slide and a pair of sports pants?

    asked on February 1, 2013
  31. math

    the lengths of two legs of a right triangle depend on time. One, whose length is x increase at the rate of 5 feet per second, while the other, of length y, decreases at the rate of 6 feet per second. At what rate is the hypotenuse changing when x=3 and

    asked on November 26, 2012
  32. English

    What is the effect of using the first person in a modest proposal by Jonathan Swift

    asked on August 9, 2019
  33. Algebra

    Identify the type of conic section that has the equation 9x^2+ 25y^2 =225 and identify its domain and range.

    asked on December 14, 2016
  34. Algebra

    The equation h = -16t^2 + 32t + 9 gives the height of a ball, h, in feet above the ground, at t seconds after the ball is thrown upward. How many seconds after the ball is thrown will it reach its maximum height? What is its maximum height?

    asked on November 26, 2016
  35. physics

    Michael, whose mass is 80 kg, runs at a speed of 3 m/s. What is his kinetic energy?

    asked on July 18, 2016
  36. Chemistry

    The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium

    asked on September 19, 2014
  37. Chemistry

    The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium

    asked on September 19, 2014
  38. Algebra

    literal equation: solve for x ax=bx-c

    asked on September 3, 2013
  39. Physics

    A skydiver deploys his parachute when he is 950m directly above his desired landing spot. He then falls through the air at a steady 5.0 m/s . There is a breeze blowing to the west at 1.1 m/s. At what angle with respect to vertical does he fall? By what

    asked on December 11, 2012
  40. physics

    A violin string vibrates at 440 Hz when unfingered. At what frequency will it vibrate if it is fingered one fourth of the way down from the end?

    asked on April 6, 2012
  41. Calculus

    Find the volume of the solid by subtracting two volumes, the solid enclosed by the parabolic cylinders y = 1 - x 2, y = x 2 - 1 and the planes x + y + z = 2, 6x + y - z + 16 = 0.

    asked on February 16, 2012
  42. Physics

    A boy tosses a football upward. If the football rises a vertical distance of 1.1 m and the boy catches it at the same point he released it, what is the velocity of the ball just before he catches it?

    asked on January 27, 2012
  43. physics

    Compute the order of magnitude of the mass of (a) a bathtub filled with water, and (b) a bathtub filled with pennies. In your solution list the quantities you estimate and the value you estimate for each.

    asked on September 20, 2010
  44. math

    In a certain neighbourhood the ratio of cats to dogs to squirrels to skunks is 5:4:7:1. If there are 119 of these animals in all, how many are dogs?

    asked on February 1, 2020
  45. math

    Kimberley's car can go 290 km on 21 L of gas. how far will her car gon on 31 L of gas?

    asked on February 1, 2020
  46. Physics

    a 57.0 kg person on a rollercoaster moving through the bottom of a curved track of radius 42.7 m feels a normal force of 995 N how fast is the car moving

    asked on June 13, 2019
  47. Physics

    A ball is thrown vertically with a velocity V0 from a building with height h, a second ball is dropped from the same building a second later, calculate the maximum inicial velocity V0 needed so that both balls get to the ground at the same time and so that

    asked on September 28, 2018
  48. Physics

    A weightlifter raises a barbell of mass 150 kg from the floor to over his head 2.5 meters in 3 seconds. What is his average power input?

    asked on June 5, 2017
  49. Algebra

    1. Find all the real square roots of a. .0064 b. - .0081

    asked on March 5, 2017
  50. Algebra

    Rewrite 32^3/5 as a radical expression and then simplify.

    asked on March 5, 2017
  51. Introduction to small engines

    The distance the piston must travel from TDC to BDC is referred to as the of the engine

    asked on February 22, 2017
  52. Algebra

    the foci of the ellipse given by the equation 100x2 + 25y2 = 2500?

    asked on December 13, 2016
  53. Chemistry

    One isotope of a metallic element has mass number 10 and has 7 neutrons in the nucleus. It forms an atomic ion having 2 electrons. Enter the symbol for this ion

    asked on September 6, 2016
  54. Math

    What is the difference between 20 hundreds and 3 x 10 to the 2nd power

    asked on June 25, 2016
  55. Math

    How much more is 245,612 than the combined numbers of 18,912 and 45,608

    asked on June 25, 2016
  56. Math

    I am a number between 1000000 and 2000000. My ones digit is the sum of my tens and hundreds digits and is also the sum of my millions and ten thousands digits.my hundred thousands, thousands, and ones digits are the same.the sum of my digits is 45.what

    asked on June 25, 2016
  57. Math

    Can someone help me complete this table? a - 5, 6, 7, 8, 9 b - 3.8, 4.6, 5.4, _, _ So, do you add 0.8 each time? I think the next two numbers are 6.2 and 7.0.

    asked on January 7, 2016
  58. Chemistry

    Now, my problem with this question is the break-down, I don't know where to start. Calculate the volume of H (g), measured at 21.9°C and 769 Torr required to react with 36.3 L CO(g), also measured at 21.9°C and 769 Torr. Assume the gases react as

    asked on October 23, 2015
  59. algebra 2

    3x+y+z=14 -x+2y-3z=-9 5x-y+5z=30 linear equations solve by elimination

    asked on September 30, 2015
  60. science

    Describe how you would find the mass of 250mL of water

    asked on September 22, 2015
  61. chemistry HELP!!

    Reaction Rate = -(1/2) [d(H2O2)/dt] = [d(O2)/ dt] Using 25 mL of a 0.2 M hydrogen peroxide solution, the following results are obtained from the equation above: 8.62 mL of gas is collected in 120 seconds. (Assume 760 Torr = 1 atm) Room temperature is 25

    asked on September 21, 2015
  62. math

    x: -2,-1, 0, 1, 2 ------------------- y: 9, 4,-1,-6,-11 find the function rule. please??

    asked on March 30, 2015
  63. Chemistry

    A 76.00-pound flask of mercury costs $132.00. The density of mercury is 13.534 g/cm3. a) Find the price of one cubic inch of mercury by calculating the following intermediate values.

    asked on January 28, 2015
  64. algebra

    Ms. Baldwin likes to eat cookies. She eats 3 cookies per day. After 5 days, there are 24 cookies left in the box. Write an equation represents the story.

    asked on October 28, 2014
  65. Algebra

    If n is the set of natural numbers that are factors of 16, what is the set in roster form? My answer is 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16

    asked on October 4, 2014
  66. science

    A salamander is a keystone species in a forest ecosystem with high biodiversity. This species migrates from woodland areas to a local stream to reproduce. If a road is built that cuts off the woodland areas from the stream, what effect will this have on

    asked on December 13, 2013
  67. science

    What determines the carrying capacity of a particular population by an ecosystem? A.keystone species B.pioneer species C.limiting factors D.renewable resources

    asked on December 12, 2013
  68. science

    Use of which of the following does not contribute carbon dioxide to the environment? refrigerator charcoal grill computer bicycle

    asked on December 12, 2013
  69. school

    Two disks are spinning freely about axes that run through their respective centres (see figure below). The larger disk (R1 = 1.42 m) has a moment of inertia of 1180 kg · m2 and an angular speed of 4.0 rad/s. The smaller disk (R2 = 0.60 m) has a moment of

    asked on October 30, 2013
  70. physics

    The propeller blades of an airplane are 2.7 m long. The plane is getting ready for takeoff, and the propeller starts turning from rest at a constant angular acceleration. The propeller blades go through two revolutions between the fifth and the ninth

    asked on October 30, 2013
  71. Alebra

    need to solve a word problem using linear equation in slope form. Ben walks 3 miles per hour, and runs at 6 miles per hour. Runs and walks a total of distance of 210 miles per week. Is this correct 210 = 3/6m +b - equation to show relation of hours run to

    asked on September 7, 2013
  72. keith

    drop a ball from a height of 1.5 meters. Calculate its seed when it hits the floor

    asked on June 27, 2013
  73. physics

    You need to fill a football with air to play with it. You know that your pump expels air at 10 ft/s. The needle of your pump has a radius of 5 micrometers. What is the volume flow rate of the air being pumped into the football?

    asked on June 16, 2013
  74. physics

    A person holds a 1.56 baseball in his hand, a distance of 34.0 cm from the elbow joint, as shown in the figure(Figure 1) . The biceps, attached at a distance of 2.75 cm from the elbow, exerts an upward force on the forearm. Consider the forearm and hand to

    asked on October 25, 2012
  75. Math

    Solve the following for the indicated variable. V = 1/3Bh for B (volume of a pyramid)

    asked on October 4, 2012
  76. math

    Erica's average rate going uphill was 80% of her average rate going downhill over the same route, and it took Erica 10 minutes longer to go up the hill than to go down the hill. What was the total number of minutes Erica spent going uphill and downhill?

    asked on August 18, 2012
  77. literacy

    To critically evaluate the qualifications of an author on a topic, carefully consider all of the following except the A. number and type of awards the author has received. B. author's age. C. other articles the author has written. D. author's educational

    asked on July 19, 2012
  78. Chemistry

    3.30 mL of vinegar needs 40.0 mL of 0.150M NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.10 qt sample of this vinegar?

    asked on June 28, 2012
  79. Calculus

    If f(x) has zeros at x=a, and x=b, the x coordinate of the turning point between x= a and x=b is 1/2(a+b). PLease help i don't understand this!

    asked on March 1, 2012
  80. Algebra

    What is 18 over 52 as a decimal rounded to the nearest thousandth

    asked on October 9, 2011
  81. physics

    A 2.9-m nylon fishing line used to hold up a 5.2 kg fish has a diameter of 1.4 mm How much is the line elongated?

    asked on June 12, 2011
  82. physics

    A hunk of cast concrete with a weight of 10 N will float if it displaces 10 N of water.

    asked on March 27, 2011
  83. Accounting

    Starfax, Inc., manufactures a small part that is widely used in various electronic products such as home computers. Operating results for the fi rst three years of activity were as follows (absorption costing basis): In the latter part of Year 2, a

    asked on February 8, 2011
  84. maths

    you want to make a flower bed in your garden. What shape would it be to make the biggest possible peramiter for an area of 214cmsq

    asked on June 16, 2010
  85. Chemistry

    Use molar volume to solve the following problems at STP. Find the volume mL occupied by 0.400 mole He. Find the number of grams of neon contained in 10.2 L Ne gas

    asked on May 17, 2010
  86. physics

    A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a fundamental frequency of 74 Hz? Answer in units of m.

    asked on April 1, 2010
  87. Physics

    If the speed of sound in air is 340 m/s, what is approximately the length of a shortest air column closed at one end that will respond to a tuning fork of frequency 140 Hz? Answer in units of cm.

    asked on April 1, 2010
  88. physics

    Two 72.0 kg hockey players skating at 5.25 m/s collide and stick together. If the angle between their initial directions was 125 degrees, what is their speed after the collision?

    asked on March 19, 2010
  89. Math - Trigonometry

    Math - Find the amplitude, period, phase shift - y=cosPi/2 (x+1/3)

    asked on February 1, 2010
  90. Calc

    An oil refinery is located on the north bank of a straight river that is 2 km wide. A pipeline is to be constructed from the refinery to storage tanks located on the south bank of the river 3 km east of the refinery. The cost of laying pipe is $300,000 per

    asked on November 30, 2009
  91. Algebra

    Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form ax^2+bx +c = 0 The solution is 6 only solution.

    asked on May 5, 2009
  92. Physics

    This is a basic question on motion. I must choose a procedure to test sideward motion and have no clue where to start. I am in 2nd grade so this test needs to be relatively simple. Thanks!

    asked on April 20, 2009
  93. Calculus

    Let f be the function given by f(t) = 2ðt + sin(2ðt) a) Find the value of t in the open interval (0,20 for which the line tangent at (t, f(t)) is parallel to the line through (0,0) and (2,4ð) b) Suppose the given function describes the position of a

    asked on December 19, 2008
  94. 4th grade

    what are 10 (things (living and non-living things)that a barracuda need to live a healthy life?

    asked on November 11, 2008
  95. math

    why do dragons sleep during the day

    asked on March 17, 2008
  96. Science

    How is friction involved in Volleyball? Hand touches volleyball maybe.... i know that but what type would that be?? Spinning friction orrolling friction??? The type of friction would relate to exactly how the hand comes in contact with the ball. Since

    asked on March 26, 2007
  97. Physics

    A block and tackle with a velocity ratio of 7 is used to raise a mass of 50kg through a vertical distance of 800mm at a steady rate. If the effort is equal to 110N. Determine (a) The distance moved by the effort. (b) The workdone by the effort in lifting

    asked on June 24, 2020
  98. math

    Violet has 8\frac{1}{3} 3 1 ​ cups of dough to make dumplings. If she uses \frac{3}{4} 4 3 ​ cup of dough for each dumpling, how many whole dumplings can Violet make?

    asked on April 27, 2020
  99. Math

    #1: a) Let a, b, c be integers and x is congruent to y (mod m). Prove that ax^2+bx+c is congruent to ay^2+by+c (mod m). b) Show that the result in part a may be false if a, b, c are not all integers, even if ax^2+bx+c and ay^2+by+c are both integers. #2:

    asked on April 22, 2020
  100. Math

    sqrt(2+sqrt(3))^7(sqrt(3)-1)^6 simplificate please

    asked on January 27, 2020


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