1. Math, derivatives

    f(x) = x² + 2Cos²x, find f ' (x) a) 2(x+cos x) b) x - sin x c) 2x + sin x d)2(x - sin2x) I got neither of these answers, since the 2nd part should be chain rule, right? f(x) = x² + 2Cos²x = x² + 2(Cos x)² then f '(x) = (2)(2)(cosx)(-sinx) My answer:

    asked by Terry on May 5, 2008
  2. chem

    i am trying to find the minimum volume of hot water needed to dissolve 100 mg of salicylic acid. when i did the calculations i got 100 ml of hot water is this correct?? The data is [temp] [amount of salicylic acid per 100 ml water, g] 0 0.10 10 0.13 25

    asked by nancy on October 13, 2008
  3. chem

    i am trying to find the minimum volume of hot water needed to dissolve 100 mg of salicylic acid. when i did the calculations i got 100 ml of hot water is this correct?? The data is [temp] [amount of salicylic acid per 100 ml water, g] 0 0.10 10 0.13 25

    asked by nancy on October 13, 2008
  4. calculus

    use the power series to estimate the series: from 0 to 4 of ln(1+x)dx with absolute value of the error less than .0001/ Give your estimate of the integral as well as a bound on the error. I found the 'terms' in the series to be:

    asked by meg on March 19, 2008
  5. Math

    We believe that 77​% of the population of all Business Statistics I students consider statistics to be an exciting subject. Suppose we randomly and independently selected 38 students from the population. If the true percentage is really 77​%, find the

    asked by Promise on October 24, 2017
  6. algebra

    Ginas previous garden she was able to plant 2 rows of corn in a 5 foot long space and 5 rows of corn in a 11 foot long space. find a linear equation for the length of the bed (y) in which she can fit x rows of corn.

    asked by Anonymous on April 15, 2012
  7. Math

    A bag contains 3 black balls, 4 green balls and 5 yellow balls. a) if two balls are picked at random without replacement, find the probability that Botha balls are of the same color. b) How many black balls must be added to the bag so that the probability

    asked by kd on May 7, 2019
  8. Elements of Calculus

    A company is manufacturing kayaks and can sell all that it manufactures. The revenue (in dollars) is given by R=750-(X^2/30) where the production output in 1 day is x kayaks. If production is increasing at 3 kayaks per day when production is 40 kayaks per

    asked by Tim on May 2, 2013
  9. Math

    At an internet provider, the cost, C naira of sending an email of 5pages or over is given by the formula C=50(P-2), where P is the number of pages to be sent a. Find the cost of sending an email of 25pages b. If it cost 800 naira to send an email message,

    asked by Victor. on November 15, 2017
  10. calculus

    use the power series to estimate the series: from 0 to 4 of ln(1+x)dx with absolute value of the error less than .0001/ Give your estimate of the integral as well as a bound on the error. I found the 'terms' in the series to be:

    asked by meg on March 18, 2008
  11. Maths ( urgent help )

    20 men can do a piece of work in 24 days. After working for 6 days, an additional number of men are taken to finish the work in 21 days from the beginning. Find the number of additional men . . . I tried using variation method but the answer didn't come

    asked by mark on October 21, 2015
  12. Algebra

    Triangles ABC and DEF are similar. Find the area of triangle ABC. Round your answer to the nearest tenth. Triangle ABC has a base of 12m. Triangle DEF has a base of 18m and height of 12m

    asked by Barb on May 7, 2014
  13. algebra

    theperimeter of a rectangle is32 ft. The lenght is 12 ft longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let x be the lenght and y be the width write the first equation 2x-2y= write the second

    asked by Anonymous on April 20, 2012
  14. math

    Q. The sum of the measures of two supplementary angels is 180 degrees. If one angel measures 45 degrees less than twice the measures of its supplement, find the measure of each angle? what steps do I need to take in order to get the measurments? A1 + A2 =

    asked by catalina on January 28, 2007
  15. math

    Distance Traveled An athlete is 16 miles from home, running toward home at 6 miles per hour. (a) Write a formula that calculates the distance D that the athlete is from home after x hours. (b) Determine D when x = 1.5 hours. (c) Find x when D = 5.5 miles.

    asked by annoymous on March 3, 2013
  16. algebra

    the primeter of a rectangle is 24ft. the length is 2 ft longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width, write the first equation. 2x+2y=__ write the

    asked by ashley on March 5, 2013
  17. Math

    The standard form of a circle is Ax^2+Cy^2+Dx+Ey+F=0. Write the equation for the circle: Center (1,2), point on the circle (-2,-1). Okay, I've always put circles in the form (x-h)^2+(y-k)^2=0. I got this: r^2=(x-1)^2+(y-2)^2 then I substitute the point to

    asked by Anonymous on February 6, 2010
  18. AP Physics

    A 3kg object initially moving in the positive x-direction with a velocity of +5m/s collides with and sticks to a 2kg object initially moving in the negative y-direction with a velocity of -3m/s. Find the final components of velocity of the composite

    asked by Anonymous on November 5, 2010
  19. physics

    A sinusoidal transverse wave of amplitude ym = 3.2 cm and wavelength = 3.4 cm travels on a stretched cord. Find the ratio of the maximum particle speed (the speed with which a single particle in the cord moves transverse to the wave) to the wave speed.

    asked by Bashr on December 24, 2010
  20. Trig!

    a) The annual inflation rate is 3.5% per year. If a movie ticket costs $7.50, find a formula for p, the price of the tickets t years from today, assuming that movie tickets keep up with inflation. b) According to your formula, how much will movie tickets

    asked by Ashley on January 15, 2013
  21. geometry

    An ant looks to the top of a bulding at an angle of elevation of 32°. The ant then walks an additional 66 feet from the edge of the building. If the new angle of elevation from the ant to the top of the building is 22°, find the height of the building.

    asked by Lauren on January 17, 2014
  22. socials

    What be the restrictions of measuring development in country by gross domestic product. What be the restrictions? What be advantages? i not really get this, is is that levels of economic development are hard to measure accurately. what to measure be

    asked by Mohammad on January 11, 2012
  23. Maths

    the inside of a glass is in the shape of an inverted cone of depth 8cm and radius 4cm. Wine is poured into the glass at a rate of 4cm^3/s. Find the rate at which the depth of the wine in the glass is increasing when the depth is 6cm. Thanks

    asked by Peirs on March 14, 2018
  24. statistics

    We believe that 77% of the population of all Business Statistics I students consider statistics to be an exciting subject. Suppose we randomly and independently selected 40 students from the population. If the true percentage is really 77%, find the

    asked by yamini on August 8, 2010
  25. math

    Kendra deposited a total of $9,000 between two saving accounts bearing simple interest. One of the accounts has an interest rate of 3% while the other rate is 4%. If the total interest earned after one year is $320, find the amount deposited into each of

    asked by seb on August 6, 2016
  26. math calculus

    (24x^3-54x^2-15x)/(6x^2-15x) i don't factor number from whole equation way i do it is find number that add to give me -54 and multiply to give -360. the number i get -60 and +6. so i do this: 24x^3-60x+6x-15x i factor this further and get

    asked by Shreya on January 4, 2012
  27. math - please help!!

    A lighthouse bears 40 degrees from a ship. After the ship sailed 10.8 miles on a course 130 degrees, the lighthouse bears 334.67 degrees at the ship. Find the distance from the second position of the ship to the lighthouse. Please!!! Lend me your genius

    asked by bang on February 10, 2016
  28. physics

    A sinusoidal transverse wave of amplitude ym = 6.4 cm and wavelength = 5.2 cm travels on a stretched cord. Find the ratio of the maximum particle speed (the speed with which a single particle in the cord moves transverse to the wave) to the wave speed.

    asked by john on December 26, 2010
  29. Elements of Calculus

    A company is manufacturing kayaks and can sell all that it manufactures. The revenue (in dollars) is given by R=750-(X^2/30) where the production output in 1 day is x kayaks. If production is increasing at 3 kayaks per day when production is 40 kayaks per

    asked by Tim on May 3, 2013
  30. calculus--please help!!

    I have two questions that I don't understand and need help with. 1. information is given about a polynomial f(x) whose coefficients are real numbers. Find the remaining zerosof f. degree 4, zeros i;9+i 2. form a polynomial f(x) with real coefficients

    asked by Paul on December 27, 2012
  31. Science

    Choose an ecosystem to research with regard to abiotic factors and how organisms in that particular ecosystem depend on those abiotic factors. Write a paragraph that describes the ecosystem that you selected and how organisms compete for abiotic factors

    asked by S on October 23, 2012
  32. math

    Currently, the Toyota Corolla is the best selling car in the world. Suppose that during a test drive of two Corollas, one car travels 224 miles in the same time that the second car travels 175 miles. If the speed of the first car is 14 miles per hour

    asked by val on December 5, 2012
  33. math

    Currently, the Toyota Corolla is the best selling car in the world. Suppose that during a test drive of two Corollas, one car travels 224 miles in the same time that the second car travels 175 miles. If the speed of the first car is 14 miles per hour

    asked by val on December 4, 2012
  34. Math

    Carpet plus installs carpet for $100 plus $8 per square yard of carpet. Carpet World charges $75 for installation and $10 per square yard of carpet. Find the number of square yards of carpet for which the cost including carpet and installation is the same.

    asked by Caitlyne on February 21, 2012
  35. Calculus

    The function g is defined for x>0 with g(1)=2, g'(x)=sin(x+1/x), and g"(x)=(1-1/x^2)cos(x+1/x). A. Find all values of x in the interval 0.12

    asked by Sarah on May 7, 2015
  36. Marketing

    Please check my grammar, sentence structure and how the references are places. Running Head: MARKETING MIX PROJECT Marketing Mix Project Natashia Johnson Keiser University MARKETING MIX PROJECT Marketing Mix Project I chose the product Banana Colada Fuze

    asked by Natashia on July 22, 2013
  37. Math: Scalar Equations of a Plane

    Find the scalar equation of each of the following planes. State which of the planes, if any, are coincident. a) r = (-8,-1,8) + s(-5,1,4) + t(3,2,-4) Scalar Equation: -12x - 8y - 13z = 0 ---- b) r = (-2,-2,5) + s(3,1,-1) + t(4,1,-4) Scalar Equation: -3x +

    asked by Anonymous on March 27, 2008
  38. Algebra 2

    James spent $(2y2 + 6). He bought notebooks that each cost $(y2 − 1). The expression to find the number of notebooks James bought is . If y = 3, James bought notebooks.

    asked by Marcedric on December 8, 2014
  39. Math

    9x^2+16y^2-18x+64y-71=0 find the coordinates of the center, the foci, and the vertices of this ellipse. 9x^2+16y^2-18x+64y-71=0 9x^2-18x+16y^2+64y=71 9(x^2-2x)+16(y^2+4y)=71 9(x^2-2x+1)+16(y^2+4y+4)=71

    asked by Anonymous on August 26, 2008
  40. algebra

    solve the polynomial y=2x^2-4x+1 For Further Reading algebra - Reiny, Thursday, May 17, 2007 at 10:34pm I am sure neither your text nor your teacher asked you to "solve the polynomial y=2x^2-4x+1 " are you graphing the function, or are you solving the

    asked by Haylee on May 18, 2007
  41. physcis

    After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 35.5 m horizontally from the end of the ramp. His velocity, just before landing, is 18.5 m/s and points in a direction 43.2 ° below the horizontal. Neglecting

    asked by KayLyn on February 19, 2012
  42. math

    NetBusters has a $30 sign-up fee plus $1.25 per video BlockFlix has a $10 sign-up fee plus $2.25 per video How do I set up a function rule equation I assume that you want to find out how many videos you have to buy before they become equal. Consider this:

    asked by Joe on May 29, 2007
  43. math

    a captive balloon is connected to a ground station A by a cable of length 842 ft inclined 65 degrees to the horizontal. In a vertical plane with the balloon and its station and on the opposite side of the balloon from A, a target B was sighted from the

    asked by rhinechilde on August 27, 2014
  44. Physics

    A 22 g ball is fastened to one end of a string 86 cm long and the other end is held fixed at point O so that the string makes an angle of 35 ◦ with the vertical, as in the figure. This angle remains constant as the ball rotates in a horizontal circle.

    asked by Lita on January 8, 2015
  45. Chemistry

    Gallium65, a radioactive isotope of gallium, decays by first order-kinetics. The half-life of this isotope is 15.2 min. How long would it take for 7/8 of a sample of this isotope to decay? 15.2 min 30.4 min 45.6 min 48.0 min I'm not sure how to do this. I

    asked by Val on March 28, 2010
  46. trigonometry

    a captive balloon is connected to a ground station A by a cable of length 842 ft inclined 65 degrees to the horizontal. In a vertical plane with the balloon and its station and on the opposite side of the balloon from A, a target B was sighted from the

    asked by rhinechilde on August 27, 2014
  47. calculus

    A trough is 9 feet long and 1 foot high. The vertical cross-section of the trough parallel to an end is shaped like the graph of y=x4 from x=−1 to x=1 . The trough is full of water. Find the amount of work in foot-pounds required to empty the trough by

    asked by Catherine on January 29, 2015
  48. trigonometry

    a captive balloon is connected to a ground station A by a cable of length 842 ft inclined 65 degrees to the horizontal. In a vertical plane with the balloon and its station and on the opposite side of the balloon from A, a target B was sighted from the

    asked by rhinechilde on August 26, 2014
  49. physics

    After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 44.5 m horizontally from the end of the ramp. His velocity, just before landing, is 15.4 m/s and points in a direction 35.1 ° below the horizontal. Neglecting

    asked by Shelby on February 18, 2012
  50. Math

    Can someone please help me with this question. Thank you! The information in the table represents the temperature of a cup of hot chocolate in relations to time. Time(t) Temperature(T) 0 60 5 54 10 48 15 44 20 41 Use the exponential regression function in

    asked by Katie on May 10, 2009
  51. Math

    Bottom part of the greenhouse has a length of 350 cm, width of 220 cm, angle at the peak of the roof measures 90 degrees. Sketch the frame and label it with actual dimensions. Use trigonometry to find length of the roof pieces. Use a scale of 1:25 to

    asked by Anonymous on January 14, 2013
  52. algebra

    A piece of pottery is removed from a kiln and allowed to cool in a controlled environment. The temperature (in degrees Fahrenheit) of the pottery after it is removed from the kiln for various times (in minutes) is shown in the following table. Time, min

    asked by Jesse on October 25, 2014
  53. Calculus

    1. Using midpoint method, estimate the area under the graph of y= sqrt x between x = 0 to x = 1, using 4 rectangles. 3. A soccer ball is kicked straight up into the air from the ground with an initial velocity of 200 ft/s. The velocity of the ball at any

    asked by Paige on November 2, 2018
  54. physics

    After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 62.3 m horizontally from the end of the ramp. His velocity, just before landing, is 22.0 m/s and points in a direction 40.3 ° below the horizontal. Neglecting

    asked by Samantha on October 5, 2013
  55. physical

    A block with mass m1 on a plane inclined at angle ƒÑ to the horizontal is connected to a second hanging block with mass m2 by a cord passing over a small, frictionless pulley, as shown. The coefficient of static friction is Us ƒÝ s and the coefficient

    asked by Lebza on April 5, 2012
  56. Math-Trig

    1. Create an algebraic expression for sin(arccosx-arcsin3x) 2. The cosx=4/5, x lies in quadrant 4. Find sin x/2 3.Determine all solutions in (0,2pie) for sin4xsin^2x=3, cot^2v(3-1)cotx=v(3), cos^2x=cosx, and tan^2x-6tanx+4=0 4. Solve; sin(∏/2-x)=1/sec 5.

    asked by Hujinson on April 14, 2009
  57. physics

    A tightly stretched "high wire" is 44 m long. It sags 3.8 m when a 56 kg tightrope walker stands at its center. What is the tension in the wire? 1 NIs it possible to increase the tension in the wire so that there is no sag? so far i know you do the inverse

    asked by Haley on January 9, 2011
  58. Math

    A block of mass 20kg rests on a smooth horizontal ground near to a fixed post, to which it is attached to a light, horizontal rod. The block is pulled away from the post by force PN inclined at 30 degrees to the horizontal. Find in terms of P, the tension

    asked by larry on December 1, 2016
  59. Calculus

    Use a symbolic differentiation utility to find the derivative of the function g(x)=xã((x^2)+1). Use the utility to graph the function and is derivative on the same set of coordinate axes. Describe the behavior of the function that corresponds to any

    asked by Jon on November 11, 2007
  60. Physics

    The soccer goal is 23.05 m in front of a soccer player. She kicks the ball giving it a speed of 17.97 m/s at an angle of 25.83 degrees from the horizontal. If the goalie is standing exactly in front of the net, find the speed of the ball just as it reaches

    asked by Lindsay on November 9, 2007
  61. physics

    At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it

    asked by Anonymous on October 14, 2013
  62. physics

    At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it

    asked by Anonymous on October 14, 2013
  63. physics

    At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it

    asked by Anonymous on October 14, 2013
  64. AP Physics - Static Equilibrium

    A man doing push-ups pauses in the position shown in the figure. His mass is 75-kg. Determine the normal force exerted by the floor on each hand and on each foot. img145.imageshack.us/img145/7130/picture1n.png (copy into url bar) a = 40 cm b = 95 cm c = 30

    asked by Phillip on November 27, 2009
  65. math

    Three authors team up to write a childrens book. The publisher pays them according to the following contracts Author - Fixed Rate - Royalty Patricia $3000 - 1n Stephan - $1500 - 2n Harlan - $1000 - 3n Find a simplified expression that represents the total

    asked by dylan on October 27, 2009
  66. To Ms. Sue

    Ms. hi! I would like you answer for me one question that I just don't get it from my English homework and if you can explain me what is a subject-verb agreement in a simple way maybe a tip or something in order that I learn how to figure it out by myself

    asked by Shayna on July 29, 2014
  67. LA

    9. Read the following list of plot events from the novel. 1. Phoebe receives a third anonymous message 2. Margaret and Mr. Brikway replant the rhododendron bush. 3. Sal's father discovers the fireplace behind a wall in their farmhouse. 4. Margaret helps

    asked by Anonymouse on May 15, 2017
  68. math

    I'm so lost with this stuff! 2. What is the P (A) if we know that the odds in favor of A occurring are 3 to 4? (See section 9.4) 3. Find the P (not A) in the situation presented in question 2 above. 4. The lottery payoff in a letter game at a church social

    asked by harmony on August 16, 2010
  69. Physics

    A wire loop of radius 0.165 m lies so that an external magnetic field of strength +0.24 T is perpendicular to the loop. The field changes to −0.32 T in 0.759 s. Note: The plus and minus signs here refer to opposite directions through the coil. Find the

    asked by Abby on April 21, 2016
  70. History-Armenian Genocide

    why is the Armenian genocide significant? can the international community prevent future genocide from happening? This site gives some excellent information. http://www.armenian-genocide.org/genocidefaq.html To consider the second part of the question, you

    asked by Katrina on October 14, 2006
  71. area and volume

    A balloon has a circumference of 22in. Use the circumference to approximate the surface area of the balloon to the nearset square inch. possible answers; 154in^2 616in^2 1,521in^2 484in^2 Find the volume of the square pyramid.Round to nearest tenth if

    asked by lilman on April 29, 2012
  72. Related Rates

    (A poignant problem) A 3-foot-tall observer holds a balloon 1 foot in front of her face. Experimentally, the observer releases the balloon and watches as it rises vertically at 5 feet per second. 2 seconds after releasing the the balloon, the observer

    asked by chan on March 2, 2017
  73. Constitutional

    If a criminal defendant goes to trial but the case ends with a hung jury, can the government retry the defendant on the same charges? Why or why not? A. No. The double jeopardy clause prohibits it. B. No. The double jeopardy and due process clauses

    asked by Amy on February 20, 2015
  74. math

    Three authors team up to write a childrens book. The publisher pays them according to the following contracts Author - Fixed Rate - Royalty Patricia $3000 - 1n Stephan - $1500 - 2n Harlan - $1000 - 3n Find a simplified expression that represents the total

    asked by dylan on October 27, 2009
  75. Physics

    A cannon is rigidly attached to a carriage,which can move along horizontal rails but is connected to a post by a large spring, initially unstretched, of force constant 60000 N/m. The cannon fires a 305 kg projectile at a velocity of 174 m/s directed

    asked by amanda and leah on January 29, 2012
  76. MATH

    1. Rosa, Roberto, Andrea, and Inno find an estimate for square root 10. Who has proposed the best solution? (1 point) Rosa: "Use square root 9 and square root 25 to estimate." Roberto: "I will use square root 4 and square root 9." Andrea: "It should be

    asked by Shalee ^~^ on October 22, 2015
  77. Math (Trigenometry)

    Find two positve real numbers whose product is a maximum and whose sum of the first number and four times the second number is 120. This is as far as I've gotten in solving it. *first number is x. *second number is y. *xy=maximum, which is unknown.

    asked by Anonymous on February 8, 2011
  78. math

    Find the sales tax rate in your area. Using this tax rate, write a linear equation representing the total with tax for a purchase of x dollars. Use this equation to determine what the pre-tax cost of the item is if the total cost with tax is $10.

    asked by Heather on May 31, 2010
  79. Statistics

    A manufacturer makes two models of an item: model I, which accounts for 80% of unit sales, and model II which accounts for 20% of unit sales. Because of defects, the manufacturer has to replace (or exchange) 10% of its model I and 18% of model II. If a

    asked by Lori on September 22, 2010
  80. PreCal

    You have 1000 coins. Start by placing one coin in its own "stack." Next to the first stack, make a stack of two coins. Then make a stack of four coins and continue creating stacks of coins, each stack twice as high as the previous one. Now I figured it

    asked by Terri on December 1, 2013
  81. Astronomy

    A star is moving away from an observer at 1% of the speed of light. At what wavelength would the observer find an emission line which would occur at a wavelength of 6000 Angstroms if the star were at rest? a. 6060 Angstroms b. 6010 Angstroms c. 6000

    asked by Xenon on February 15, 2018
  82. chemistry

    Hello, im having major issues with this problem...I need to find a pH for a 100.0-mL solution of 0.017 M CH3COOH (Ka = 1.8 10-5) is titrated with 0.025 M NaOH. Now, I've gotten some the answers all ready (right answers have *)....but three of them are

    asked by A person on October 12, 2011
  83. geometry

    ABCD is a rectangle. A is the point (0,1). c is the point (0,6) the equation of the straight line through A and B is y=2x+1. (a)Find the equation of the straight line through D and C

    asked by Anonymous on February 14, 2011
  84. probability

    On average, 40 customers are visiting a store in an hour. Find the probability of more than 40 customers visiting that store in an hour. (15 p)

    asked by ABDULA YUSUF on April 16, 2016
  85. marketing

    I need to find companies that are a small business under 20 employers to try to contact for meetings.do you know any companies that are a small business that are under 20 employers.

    asked by ali on June 11, 2014
  86. physics

    If the refractive index of air to glass is 1.52 and air to water is 1.33, find the density of the glass if density of water is 1g/cm^3

    asked by U on August 24, 2011
  87. math

    A, B, C and D each had some money. D doubled the amounts with the others. C then doubled the amounts with others. B then doubled the amounts with the others. A then doubled the amounts with the others. At this stage, each of them has $80. Find the initial

    asked by angelin on December 8, 2014
  88. math

    For #s 4-7 #4) is Increase 35 by 40% 35 * 1.4 = 49 #5)Increase 125 by 8% 125 * 0.08 = 10 #6) Decrease 8 by 75% 8 * 0.75 = 6 #7) Decrease 135 by 22% 135 * 0.22 = 29.7 ARE THESE CORRECT YOU HAD TO FIND THE NEW AMOUNT.

    asked by Tori on February 27, 2012
  89. Math

    Find the area between the x -axis and y = x 3 when 2 ≤ x ≤ 5. 44 1/3 square units 152 1/4 square units 39 square units 160 1/4 square units

    asked by Bri on April 4, 2019
  90. abstract algebra

    Suppose K = {{2,3,4,5,6,7},{2,5,7,8,12},{1,2,3,5,7,9,13,20}}. Find three upper bounds for K in P(N) and three lower bounds. Does K have a least upper bound? Does K has a greatest lower bound?

    asked by lala on February 18, 2012
  91. Math

    The sum of the ages of Dorothy and Dona is 41. In five years, Dorothy will be twice as old as Dona. Find their ages 3 years ago.

    asked by Liza on February 28, 2015
  92. algebra 1

    the sum of a two digits of a two-digit number is 10. when the digits are reversed, the new number is 36 more than the original number. find the original number.

    asked by daisy on January 28, 2018
  93. math

    Find the derivative of y=3x-2(4^x) Here is my attempt: Derivative of 3x is 3 Derivative of 2 is 0 derivative of 4^x is 4^x(ln(4)) Answer: 12^x(ln(4)) Is this correct? If not please explain what I did wrong and what the correct answer is and why. Thanks!

    asked by Anonymous on October 15, 2013
  94. Chemistry

    Find number of hydrogen atoms: 1 mol of NH3 1 mol of N2H4 4 mol of NH3 3 mol of N2H4

    asked by Anonymous on October 29, 2015
  95. math

    The ratio of the units digit to the tens digit is one-half. The tens digit is two more than the units digit.Find the number.

    asked by kitty on February 20, 2017
  96. math

    The triangles below are similar. Find the value of x. The first triangle has 5 on the right and left side and 4 on the bottom. The second triangle has 9 on the right and on the left side and x is at the bottom. A)8.2 B)7.8 C)7.2 D)6.8

    asked by Cute min on January 20, 2018
  97. Algebra Variation Constant

    What does this mean? Do I graph this or what? Find the variation constant and an equation of variation where y varies directly as x and y=12 when x=2 The variation constant =? The equation of variation is y=?

    asked by Micah on February 27, 2008
  98. algebra 1

    Find the roots of y=x^2, axis of symmetry and vertex. I got roots: (0,0) axis of symmetry: minimum point x=0 vertex: (0,0)

    asked by tom on May 2, 2015
  99. Math 112 Help please

    How do I break these down to find out which one is the largest without using a calculator their fraction. a. 13,579 + 1/2468 b. 13,579 - 1/2468 c. 13,579 * 1/2468 d. 13,579/ 2468

    asked by Enis on April 14, 2013
  100. Algebra

    The sum of the digits of a two-digit number is 13. If the digits are reversed, the new number is 9 more than the original number. Find the original number

    asked by Alexander on April 18, 2018

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