Determine the length and breadth of a rectangle if the length is 3cm less than twice the breadth, and the perimeter is 18

40,002 questions, page 207
1. physics

A pen placed 13.0 cm from a concave spherical mirror produces a real image 13.5 cm from the mirror. a) What is the focal length of the mirror? Answer in units of cm. b) Calculate the magnification of the image. Assume the pen is placed 28.9 cm from the

asked by Laura on May 22, 2011
2. Physics

Car 1 has a mass of m1 = 65 multiplied by 103 kg and moves at a velocity of v01 = +0.95 m/s. Car 2, with a mass of m2 = 92 multiplied by 103 kg and a velocity of v02 = +1.1 m/s, overtakes car 1 and couples to it. Neglect the effects of friction in your

asked by Lauren on February 22, 2011
3. CHEMISTRY

Calculate ΔSfus and ΔSvap for HF. Determine the entropy change when 7.60 mol of HF(l) freezes at atmospheric pressure. I already calculated ΔSfus as 24.103 J/k*mol and ΔSvap as 86.07 J/K*mol....These are correct (I checked them already). I need help

asked by Brian on March 14, 2012
4. CHEM

Calculate ΔSfus and ΔSvap for HF. Determine the entropy change when 7.60 mol of HF(l) freezes at atmospheric pressure. I already calculated ΔSfus as 24.103 J/k*mol and ΔSvap as 86.07 J/K*mol....These are correct (I checked them already). I need help

asked by Srah on March 16, 2012
5. Pre-Calculus

Hello! I wanted to know if my answers are right or not? Thanks! :) 1.) Segments AB and CD have the following endpoints. Determine whether the segments are parallel, perpendicular or neither. A (3, 0), B (-2, 2), C (-1, 4), D (-3, -1) My answer: Parallel

asked by Abby on September 13, 2014
6. Pre-Calculus

Hello! I wanted to know if my answers are right or not? Thanks! :) 1.) Segments AB and CD have the following endpoints. Determine whether the segments are parallel, perpendicular or neither. A (3, 0), B (-2, 2), C (-1, 4), D (-3, -1) My answer: Parallel

asked by Abby on September 14, 2014
7. PHYSICS

A pendulum was set up and measurements were made to enable the mechanical energy to be calculated at the start position S and the lowest point of the pendulums swing L. The mass of the pendulum bob was determined on an electronic scale and its diamter was

asked by Sarah on January 30, 2010
8. Calculus -math

The Perfect Pizza Parlour estimates the average daily cost per pizza, in dollars, to be c(x)=0.00025x^2 +8x +10/x, where x is the number of pizzas made in a day. A) Determine the total cost at a production level of 50 pizzas a day B) Determine the

asked by Anonymous on April 2, 2017
9. Math

8) A consumer groups tries to determine the most expensive items in a convenience store. Four items are purchased in the convenience store and compared to the average price in stores in the area. Assume tat the price distribution is normal. Use your

asked by Kay on November 18, 2012
10. Calculus

A man has 340 yards of fencing for enclosing two separate fields, one of which is to be a rectangle twice as long as it is wide, and the other, a square. The square field must contain at least 100 square yards and the rectangular one must contain at least

asked by Amy on February 5, 2012
11. Math

Lamar wants to slice a 35-ounce tomato and a 28-ounce tomato into pieces of the same weight. He finds the greatest common factor of the tomato weights to determine the weight of each piece. What is the greatest common factor of 35 and 28? Show your work.

asked by Help on March 31, 2015
12. Statistics

The turnover (in millions of pounds) for 8 train companies and 8 coach companies are given below. Train 4.3 13.2 134 88 92 66.5 122.1 102 Coach 2.2 31 44 72 19 89.3 55.9 43.1 (a)Using an appropriate statistical test determine whether train companies or

asked by waqas on August 17, 2011
13. math

Could someone please help me answer this question i am stuck! A Marketing company provides the following formulas to the owner of an amusement park to help him make decisions about the park. -The number , N, of people who attend the park is a function of

asked by angelina on July 24, 2016
14. calculus

Find the dimensions of the rectangle with area 256 square inches that has minimum perimeter, and then find the minimum perimeter. Dimensions: Minimum Perimeter:

asked by casidhe on April 20, 2012
15. Physics

A solenoid has N=1760.0 turns, length d=40 cm , and radius b=0.4 cm, (bL/R) after S1 is closed? . (d) How much energy (in J) is stored in the magnetic field of the coil a very long time (t>>L/R) after S1 is closed? For the next part, assume that a very

asked by Anonymous on May 23, 2013
16. Language Arts

My teacher said to create an acrostic poem with the name EAST MILLBROOK and we have to fill it in with or goals for the year the only problem is she wants us to use words like exemplify instead or show. Please help me!!! This is what it should look like

asked by Megan on August 29, 2006
17. Math

1. The sum of a number and 2 is 6 less than twice that number. 2. A rectangular garden has a width that is 8 feet less than twice the length. Find the dimensions if the perimeter is 20 feet. 3. Complementary angles sum up to equal 90 degrees. Find the

asked by Naim on March 26, 2019
18. waste water treatment

Wastewater from a small town is treated in a trickling filter which is preceeded by a screen, sand-removal and primary clarification. The maximum hydraulic capacity, or peak flow, of the treatment plant is 1,500 m3/h. The dry weather flow (Qdwf) amounts

asked by Nilu on November 25, 2013
19. physics

A. A uniform, upward-pointing electric field E of magnitude 3.00 10e3 N/C has been set up between two horizontal plates by charging the lower plate positively and the upper plate negatively. The plates have length L = 4 cm and separation d = 2.00 cm. An

asked by Andy on January 21, 2010
20. STAT

Airline overbooking is a common practice. Many people make reservations on several flights due to uncertain plans and then cancel at the last minute or simply fail to show up. Eagle Air is small commuter airline. Their planes hold only 25 people. Past

asked by Michelle on May 1, 2012
21. Physics

This is another problem that I need clarification on since no one seems to be of any help at my school, A pulley system is used to lift a 52- crate.Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to

asked by Matthew on October 8, 2009
22. physic

A stationary 2.0 kg object is located on a table near the surface of the earth. The coefficient static friction between the surface is .80 and the coefficient of the kinetic friction is 0.65. A horizontal force of 5N is applied to the object. Determine the

asked by pam on March 27, 2014
23. physic

A stationary 2.0 kg object is located on a table near the surface of the earth. The coefficient static friction between the surface is .80 and the coefficient of the kinetic friction is 0.65. A horizontal force of 5N is applied to the object. Determine the

asked by pam on March 27, 2014
24. Calculus

Given that C(x)=2x^3-21x^2+36x+1000 is a cost function, determine the intervals for which the cost is increasing. Determine any intervals for which the marginal cost is increasing. Marginal cost is when you derive the cost function, correct? So do you do

asked by Lindsay on December 7, 2013

Given that C(x)=2x^3-21x^2+36x+1000 is a cost function, determine the intervals for which the cost is increasing. Determine any intervals for which the marginal cost is increasing. Marginal cost is when you derive the cost function, correct? So do you do

asked by Lindsay on December 7, 2013
26. Math sin/cos

On a piece of paper draw and label a right triangle using the given sides, solve for the unknown side and write the trigonometric functions for angles A and B, if a=5 and c=7. I already found side b which equals 2 sqrts of 6. Now I need to find the sin/cos

asked by Anonymous on March 10, 2007
27. physics

A horizontal spring mass system is set up to keep time so that it goes from one side to the other in 6 seconds. The mass used in this system is 0.69 kg. The distance from one side to the other is 2.4 m. What spring constant should be used if it is to

asked by sunny on December 31, 2012
28. Mathematics (Probability, Statistics, etc.)

I have a Statistics project due tomorrow on Combinatorics. Admittedly, while my math skills aren't too bad (I get 99th percentile on standardized tests and such), it has been a while since I last took a math class after a 2-year lapse in education, so my

asked by Matt on October 30, 2011
29. physics

A 0.59 kg rubber ball has a speed of 1.50 m/s at point A and kinetic energy of 7.0 J at point B. (a) Determine the ball's kinetic energy at A Correct: Your answer is correct. J (b) Determine the ball's speed at B

asked by kelly on December 3, 2014
30. math

Directions: Follow the instructions below to design a fair race for the new video game Animal Tracks. 1. Choose two animals with different speeds. You can choose from the chart that starts at the bottom of this page or do research to choose your own. 2.

asked by Anonymous on April 3, 2018
31. maximum and minimum problems when function unknown

Hi, can anyone please help me with this problem, i have no idea what to do! The question is: a window frame is in the shape of a semicircle joined to a rectangle. Find the macimum area of a window using 300 cm of framework. i can usually solve these sorts

asked by elle on May 21, 2007
32. Accounting

Using a perpetual system, how do I determine the FIFO,LIFO, weighted average, and specific identification. Dec. 7, 10 units @ 6.00, Dec 14 20units @ 12.00, and Dec 21. 15 units @ 14.00 cost. trader sells 15 units for 25 each on December 15. Eight of the

asked by Lynn on May 1, 2007
33. PreCalc

The temperature T(t) varies sinusoidally on a certain day in December. The minimum temperature is 35 degrees Fahrenheit at midnight. The maximum temperature is 50 degrees Fahrenheit at noon. Let t be the number of hours since midnight (t=o at midnight).

asked by Katy on April 27, 2016
34. Statistics

Use the following dates to compute the ALOS and median LOS and range. The discharge date is July 2nd (non-leap year). Round the ALOS to one decimal place. Admission Date LOS 1-2 January = 29; February = 28; March = 31; April = 30; May = 31; June = 30; July

asked by Anonymous 11/9/13 on November 9, 2013
35. PHYSICS

#1.) A 3.0 kg computer printer is pushed across a desk at a rate of 0.6m/ s2 (towards the right). Determine the force applied to the printer #2.) If a 0.9 kg apple falls from a tree and hits the ground with a force of 8.82 N calculate the acceleration of

asked by AMANDAAA on February 3, 2013
36. PHYSICS

#1.) A 3.0 kg computer printer is pushed across a desk at a rate of 0.6m/ s2 (towards the right). Determine the force applied to the printer #2.) If a 0.9 kg apple falls from a tree and hits the ground with a force of 8.82 N calculate the acceleration of

asked by AMANDAAA on February 3, 2013
37. chemistry

The first step of the synthesis is described by the reaction below. When 1.750 g of Fe(NH4)2(SO4)2 6H2O is mixed with 13 mL of 1.0 M H2C2O4 , the theoretical yield of FeC2O42H2O is ? grams.. I do not understand why my answer is not correct. How do you find

asked by Tiffany on June 30, 2007
38. Algebra 2

Can someone check my answers? 1. Convert 13pi/30 to degree measure. 78° 2. Find the distance between (4,4) and (8,7). 5 3. What is the vertex of the parabola y = (x + 8)^2 - 2? (-8,-2) 4. The graph of y = 6(x - 8)^2 + 1 open downward. False. 5. An angle

asked by Nikki on November 13, 2017
39. chemistry

DATA Empty Evaporating dish and watch glass: 33.6g Evaporating dish, watch glass and NaHCO3: 35.08g Evaporating dish, watch glass and product: 34.65 NaHCO3(s) + HCL (aq) ----> NaCl(s) + H2O(L) + CO2(g) 1. Determine the mass if the sodium bicarbonate

asked by Mark on November 13, 2008
40. Physics

An object is formed by attaching a uniform, thin rod with a mass of mr = 6.54 kg and length L = 5.12 m to a uniform sphere with mass ms = 32.7 kg and radius R = 1.28 m. Note ms = 5mr and L = 4R. 1)What is the moment of inertia of the object about an axis

asked by stewart on November 7, 2014
41. nutrition

Case Study: Diet for a Patient with Chronic Hunger, Iron Deficiency Anemia, and Lead Poisoning Jonathan, a two-and-a-half-year-old, lives with his mother and brothers at his grandmother's house in Chicago. His mother, Anita, works at a pharmacy to support

asked by loretta on April 29, 2010
42. physical

An air-cooled motorcycle engine loses a significant amount of heat through thermal radiation according to the Stefan-Boltzmann equation. Assume that the ambient temperature is T0 = 22.3°C (295.45 K). Suppose the engine generates 13.5 hp (10.07 kW) of

asked by itufizik on July 23, 2012
43. physics

An air-cooled motorcycle engine loses a significant amount of heat through thermal radiation according to the Stefan-Boltzmann equation. Assume that the ambient temperature is T0 = 24.5°C (297.65 K). Suppose the engine generates 11.5 hp (8.58 kW) of power

asked by Anonymous on November 5, 2014
44. physics

An air-cooled motorcycle engine loses a significant amount of heat through thermal radiation according to the Stefan-Boltzmann equation. Assume that the ambient temperature is T0 = 24.5°C (297.65 K). Suppose the engine generates 11.5 hp (8.58 kW) of power

asked by Anonymous on November 9, 2014
45. Math

Determine the slope and y-intercepts 2x = 3y + 4 8x − 2y − 3 = 0

asked by Di on May 3, 2014
46. Math

Let f(x)=(x^-9)/x-3 where x cannot equal 3 and f(x)=2x where x =3 Determine is f(x) is continuous at x=3 How do we know?

asked by Anonymous on September 19, 2018
47. math

How do you determine if two lines are perpendicular?

asked by dee on November 13, 2009
48. Calculus

determine the angle between the planes 2x + 2y + 7z = 8 and 3x - 4y + 4z = 5

asked by j on May 17, 2012
49. math

how can you determine if two lines are perpendicular

asked by DAVISHA on February 4, 2009
50. Math

How would I start both of these questions not sure. If h(x)=1/(x+3)^3 then determine a. f(x) and g(x) such that h(x)=(f of g)(x). b. r(x) and s(x)different from f(x) and g(x)such that h(x)=(r of s)(x)

asked by Mekhia on February 23, 2017
51. MATH

HOW CAN YOU DETERMINE IT TWO LINES ARE PERPENDICUAR?

asked by DAVISHA on February 4, 2009
52. math

how can you determine if two lines are perpendicular?

asked by DAVISHA on February 4, 2009
53. graphs in math

C varies inversely as J. If C = 7 when J = 0.7, determine C when J = 12

asked by Pam on January 20, 2013
54. Math

If f(x) = (x-4) (x+3) , determine the x-intercept of each function a)y=f(x) b) y=-2f(x) c) y=(-(x+1)) thanks for the help !!!!!!

asked by Melissa on September 24, 2011
55. Math

Rewrite y = 5(10−3x) in the form y = Ae^(mx). (i.e., determine A and m)

asked by Matt on October 25, 2011
56. Calculus

Determine the remainder for Sn where n=5 or n=9 for the following series. ∑n=1 to ∞ (n^2+1)/(n^4) S5= R5= S9= R9=

asked by Janna on April 29, 2017
57. Algebra

Given g(x)= [6x for 0 < x ¡Ü 2 [3x+3 for 2 < x ¡Ü 8 [5x-4 for 8 < x ¡Ü 12 Determine g(6) Briefly explain

asked by Alicia on June 17, 2009
58. maths

When x^3+mx^2-5x+4 is divided by x+2,the remainder is 8.determine the value of m

asked by tsholofelo on February 2, 2015
59. Science

Determine the pkb of methylamine if the kb is 4.4*10^-4.

asked by Terry on March 16, 2014
60. Algebra

Given g(x)= [6x for 0 < x < or = 2 [3x+3 for 2 < x < or = 8 [5x-4 for 8 < x < or = 12 Determine g(6) Briefly explain

asked by Alicia on June 17, 2009
61. value

HOW TO DETERMINE THE DENSITY OF A KEROSENE

asked by value on February 1, 2017
62. Chemistry

Determine the pH of 0.18M NH4Cl.

asked by Katelynn on March 8, 2010
63. precalc

Determine whether the equation is linear in x. 5-3x=0 5=10/2 x+3=x-5

asked by kate on September 14, 2009
64. trig

Determine the amplitude of: y=cos x

asked by Bernice on December 16, 2009
65. us/101

How would you determine the best way to communicate with each group?

asked by danielle on September 20, 2012
66. inequalities

Determine when the function f(x)=3x^3+4x^2-59x-13 is less than 7

asked by andrea on October 13, 2014
67. trig

CosA*Cos17=1 then determine A

asked by kunal on December 7, 2011
68. Chemistry

Determine the pH of 0.18M NH4Cl.

asked by Katelynn on March 8, 2010
69. Chemistry

Determine the pH of 0.18M NH4Cl.

asked by Katelynn on March 8, 2010
70. Math

Rewrite y = 5(10^(−3x)) in the form y = Ae^(mx). (i.e., determine A and m)

asked by Matt on October 25, 2011
71. math/116

How can I determine if two lines are perpendicular?

asked by Sydney on September 15, 2010
72. analytical geometry

Determine the value of p if A(-3;p) is equidistant from the points C(7;-1) and D(4;-4)

asked by kamogelo on April 16, 2015
73. math

how should we determine the range of functions........

asked by kolam on September 2, 2013
74. math

determine whether the ratio are equivalent 10/17 and 30/51 A)yes B)no

asked by makeeda on January 14, 2010
75. Maths

Determine the equation of motion

asked by Rabelani on January 25, 2015
76. Chemistry

Determine the pH of 0.18M NH4Cl.

asked by Katelynn on March 8, 2010
77. Chemistry

Determine the pH of 0.18M NH4Cl.

asked by Katelynn on March 8, 2010
78. Math

Determine whether u and v are orthogonal,parallel, or neither. u=-2i+j v=3i+6j

asked by Matt on February 16, 2011
79. Chemistry

Determine the number of moles in 56 g of N2

asked by Emily on May 3, 2011
80. Math

Determine the projection of u = 1.6i + 3.3j in the v = -2.1i - 0.5j direction a. 0.8i +0.2j b. 2.3i = 0.5j c.-0.6i-1.3j d. -1.2i-1.1j

asked by Les on April 2, 2017
81. calculus

Determine the following limit. lim (1/x-3) x->3

asked by Roger on September 19, 2011
82. i logic

Truth tables can determine which of the following

asked by Wally on September 8, 2013

determine which ordered pair of y -5x 10

asked by meow meow kit kat on March 6, 2019
84. Algebra 2

determine all symmetries of the function g(x)=x/x-1

asked by Alex on September 19, 2014
85. Arrays and Expanded Algorithm

How do you determine the product using an array.

asked by Denver Elementary on September 22, 2011
86. math

determine the follwing.. given that f(x)= -x + x^2 -x -3 find a.f(-2) b.f(1) c.f(3a)

asked by me on July 4, 2008
87. math/116

How can I determine if two lines are perpendicular?

asked by Sydney on September 15, 2010
88. Science

How to determine for an empirical formula?

asked by Pauline on May 7, 2018
89. Math

for h(x)=5-4x, determine the input for x when the output of h(x) is -11

asked by Melissa on September 22, 2011
90. Algebra

Not sure how to do this problem need a little help at least to start. If h(x) = 1/(x+3)^3 then determine f(x) and g(x) such that h(x) = (f of g)(x).

asked by Nicole on February 22, 2017
91. Algebra2

Determine if the given function is even, odd or neither. 1. f(x)= 3x^4 -2x^2 Even? 2. f(x)= x^3+x

asked by BillyBob on September 17, 2012
92. math

Determine whether the following is a trinomial square x2 - 9x + 81

asked by Anthony on February 3, 2012
93. math

8,18,28,38,48 determine the next sequence. Is the answerer 58?

asked by Kelli on December 16, 2014

Determine the amplitude of: y=-2sinx

asked by Bernice on December 14, 2009
95. math

Determine whether the functions are even, odd, or neither. (a) f(x) = x²/√x²+ 1 (b) g(x) = x^3 - √ x- 7

asked by Zach on April 2, 2008
96. Math

Use estimation to determine which expression has the least value A. 5 3/4 + 2 1/4 - 2 1/8= 8? B. 6 1/4 + 1 - 1 1/4= 6? C.8 1/3 - 1 1/2 + 1 1/3= 7? D? 12 2/5 - 5 +2 4/5= 10? B has least value

asked by Lance on September 17, 2012
97. Chemistry

Determine the pH of a 0.10 M MgCl2 solution.

asked by Anon on October 16, 2011
98. Math equation

Please determine if -4 is a solution of the inequality x ¡Ý 4

asked by Lavern on December 3, 2011
99. algebra

Determine whether or not the relation is a function. (-3,6), (-2,7, (-1,8), (0,9)

asked by samuel on January 26, 2013
100. logic

Truth tables can determine which of the following?

asked by me on December 2, 2011