Questions Asked onJuly 12, 2013

1. Maths

Prove that max & min values of asinx+bcosx are =/- (a^2+b^2)^1/2

asked by Alok
2. Physics

Which of the following is correct for the reflected ray if a light ray strikes a plane mirror at an angle of 50° from the normal? a. 40° from the surface of the mirror b. 40° from the normal c. 50° from the surface of the mirror d. 90° from the normal

asked by Jordan
3. maths

Prove that max & min values of asinx+bcosx are = +/- (a^2+b^2)^1/2

asked by mahesh
4. Calculus

The question is find the area of the reagion that is bounded by the curve y=arctan x, x=0, x=1, and the x-axis. So I've drawn the enclosed region. To find the area would I use the Disc/shell method? If so the formula that I came up with looks like this: If

asked by Isaac
5. Biology

Will you please check my answers? 1. Single-celled organisms that do not have a membrane-bound nucleus are called A. organelles. B. prokaryotes. C. Golgi bodies. D. eukaryotes. 2. In cells, a form of active transport is A. a sodium-potassium pump. B.

asked by Macy
6. Calculus

Skeletal remains had lost 81% of the C-14 they originally contained. Determine the approximate age of the bones. (Assume the half life of carbon-14 is 5730 years. Round your answer to the nearest whole number.) yr

asked by Anonymous
7. Calculus

Find the derivative of the function. f(x) = ex8 - 6

asked by Shan
8. physics

an object weighs 10N on earth .what is the objects weight on a planet one tenth the earths mass and one half its radius?

asked by Kat
9. Computers C++

1.) Look at the following array definition. int numbers[] = { 2, 4, 6, 8, 10 }; What will the following statement display? cout

asked by Thomas
10. Calculus

Four hundred students attended the dedication ceremony of a new building on a college campus. The president of the traditionally female college announced a new expansion program which included plans to make the college coeducational. The number of students

asked by Anonymous
11. Calculus

Find the absolute extrema of the function on the interval [2, 9]. (Round your answers to the nearest hundredth.) g(x)=x/(ln(x)) Absolute minimum: at x = Absolute maximum: at x =

asked by Anonymous
12. statistics

MBA604 Statistics Assignment 1 Part 1 1) (5 pts) An electronics company is about to launch a new product. If the serial number for each piece produced has the following format: LLNNN where L stands for any letter in the English alphabet and N is a number

asked by austin
13. Chemistry

Consider the decomposition of a metal oxide to its elements where m represents a generic metal. M2O(s)2M(s)+1/2O2(g) the delta G is 10.30 I need to find K and PressureO2 at 298K I know the equations but i keep getting the answer wrong could you please help

asked by Catherine
14. Calculus

Find the absolute extrema of the function. (Round your answer to three decimal places.) f(x) = xe-x2 on [0,2] Absolute maximum value: at x = Absolute minimum value: at x =

asked by Shan
15. science

Which one of the following gases occupies the smallest volume at STP? A.4g helium B.14g nitrogen C.34g ammonia D.32g oxygen

asked by Nhlalo
16. Stats ()

Coal is carried from a mine in West Virginia to a power plant in Pittsburgh in hopper cars on a long train. The automatic hopper car loader is set to put 75 tons of coal into each car. The actual weights of coal loaded into each car are normally

asked by penelope
17. Calculus

Find the derivative of the function. g(x) = ln(3x + 5)

asked by Anonymous
18. stats college

Which of the following confidence intervals will be the widest? a. 90 percent b. 95 percent c. 80 percent d. 98 percent

asked by penelope
19. Chemistry

Calculate the work done (in joules) by a chemical reaction if the volume increases from 3.3L to 3.5L against a constant external pressure of 3.7atm .

asked by Karina
20. Calculus

Find the derivative of the function. f(x)=ln(sqrt(x)+6)

asked by Anonymous
21. Calculus

Find the absolute extrema of the function. (Round your answer to three decimal places.) f(x) = xe^-x2 on [0,2] Absolute maximum value: at x = Absolute minimum value: at x =

asked by Anonymous
22. General Chemistry

A 0.484 g sample of impure NH4Br is treated with 25.00 mL of 0.2050 M NaOH & heated to drive off the NH3. The unreacted NaOH in the reaction mixture after heating required 9.95 mL of 0.0525 M H2C2O4 to neutralize. How many grams of NH4Br were in the

asked by <3
23. college algebra

if the altitude and the base of a triangle are each increased by 4 inches the area of the triangle will be increased by 42 square inches. if the altitude is increased by 3 inches and the base is decreased by 2 inches the area will be increased by 5 square

asked by quintana
24. calculus

two forces f1 and f2 acting on an object at a 90 degree angle will pull the object with a reluctant force, R, at an angle between f1 and f2. R= ã f1^2+f2^2 R=15 and f1=9 find f2

asked by monica
25. AP Calculus

[(3/x)-(4/y)]/[(4/x)-(3/y)]

asked by Anon
26. AP Calculus

Show work to determine if the relation is even, odd, or neither. 1. 3x=|y| (|y|=abs. value of y) Simplify the following complex fractions. 2. [(3/x)-(4/y)]/[(4/x)-(3/y)] PLEASE HELP!

asked by Anon
27. Vocabulary

Determine whether the definition below is denotative or connotative Gray: A cold, glommy day. A. connotative B. Denotative

asked by LadyT
28. AP Calc.

Simplify: [(x^-3)-x]/[(x^-2)-1]

asked by Anon
29. AP Calc

Solve the following absolute value inequalities: |x+1|

asked by Anon
30. PHYSICS

An arrangement of 3 blocks A ,B,C such that block A of mass 5 kg is over block B of 6 kg, with a friction between them of 0.8. both the blocks are connected to the 3rd block C of mass m by a string and frictionless pulley. Now to find at what value of m

asked by SURAJ
31. Math

Determine the simple interest P=2500 R=3 7/8 T=9 months

asked by Carie

Determine the missing value by using simple interest P= R= 2% T=90days i=$12.50 asked by Carie 33. Math Simplify the complex fraction: [(4/(x-5))+(2/(x+2))]/ [((2x)/(x^2-3x-10))+3] asked by Sarah 34. Physics(Thermodynamics) 1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % 2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and asked by Danny 35. Math Solve for x. x/(x-2) + (2x)/[4-(x^2)] = 5/(x+2) Please show work! asked by April 36. science A detailed description on the environment the eagle live in:this should include the temperature,vegetation,source of water and climate changes in the habitat. asked by kina 37. com A word's denotation is its ________ asked by kayla 38. Calculus The growth rate of Escherichia coli, a common bacterium found in the human intestine, is proportional to its size. Under ideal laboratory conditions, when this bacterium is grown in a nutrient broth medium, the number of cells in a culture doubles asked by Anonymous 39. Math Find the domain of the following functions. 1. y= radical(x-3) - radical(x+3) 2. y= [radical(2x-9)] / 2x+9 3. y= radical(x^2 - 5x -14) 4. y= [cubed root(x-6)] / [radical(x^2 - x - 30)] I'm terrible at finding domains.. so any help with these problems would asked by April 40. chemistry Identify the hydroxyl groups (O−H \rm O\!-\!H) by right-clicking each atom individually on the canvas and then mapping it to M1. asked by Anonymous 41. chem ll Calculate the pH of a buffer that is 0.250M in NaHCO3 and 0.300M in Na2CO3 asked by Anonymous 42. Math Show work to determine if the relation is even, odd, or neither. f(|x|) = |x|- x^2 + 1 I thought it was even because the absolute value and squared will cancel the negatives, but I don't know how to show this through math.. asked by Anonymous 43. Algebra Determine whether the equation defines y as a function of x. y= -16 asked by tony 44. Calculus There is this improper integral problem I've been given. I've completed most of it but still don't understand what I'd get, I don't quite get what it means to go from 'e' to 'infity'. What would I get? -ln(x)+1/x from 'e' to 'infinity' + -1/x from 'e' to asked by Isaac 45. Elementary mechanics (Q1) 2 forces act on a point object as follows: 100 at 170 and 100 at 50.Find the resultant force (a)110N at 50 (b)110N at 100 (c)100N at 110 (d) 100N at 50 (Q2) given 3 vectors a=-i-4j+2k,b=3i+2j-2k,c=2i-3j+k,Calculate a-(b-c) (a)-6(b)6(d)9(d)-9 (Q3)The asked by david 46. physic A Ferris wheel 26.0m in diameter rotates once every 15.0s What is the ratio of a person's apparent weight to her real weight at the top? asked by cuzer 47. College Chemistry Based on a Kc value of 0.140 and the data table given, what are the equilibrium concentrations of XY, X, and Y, respectively? asked by Anonymous 48. College stats Please help, I would appreciate an explanation on how you got the answer so I can understand it, being that I am so confused. The Denver Post stated that 80% of all new products introduced in grocery stores fail (are taken off the market) within 2 years. A asked by penelope 49. college stats Sorry for all the questions, I really need help and an explanation so I can fully understand. I really appreciate everything. Thank you. In a random sample of 519 judges, it was found that 285 had an introvert personality type. Construct a 95% confidence asked by penelope 50. physic A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9×107m . The magnitude of the gravitational force exerted on the satellite by the planet is 140N What would be the magnitude of the gravitational force exerted on the asked by cuzer 51. college stats Again sorry for all the questions. please help, I am not good at stats and find these questions very difficult. I would appreciate an explanation if possible. 1.What is the sample average? 2.What is the SD of the box? 3.What is the number of draws from the asked by penelope 52. Essay Can someone help me please I have to write a essay on if you won a million dollars and cannot spend it on yourself or family what would you do with it. I need help to start it just the opening line please asked by Mark 53. physics A 9.90-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.372. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b) asked by gina 54. physics Three forces act on a moving object. One force has a magnitude of 83.4 N and is directed due north. Another has a magnitude of 47.2 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object asked by howard 55. physic Planet A and planet B are in circular orbits around a distant star. Planet A is 4.5 times farther from the star than is planet B. What is the ratio of their speeds vA/vB? asked by cuzer 56. Linear Equation A gas station sells regular gas for$2.20 per gallon and premium gas for $2.70 a gallon. At the end of a business day 220 gallons of gas were sold and receipts totaled$519. How many gallons of each type of gas were sold? I know its a linear equation. just

asked by Sara
57. physics

What is the kinetic energy of each electron in a beam of electrons if the beam produces a diffraction pattern of a crystal which is similar to that of a beam of 1.00 eV neutrons? Note: The electron mass is 9.11 × 10–31kg; and the neutron mass is 1.67 ×

asked by Lacey
58. college stats

I am having a lot of trouble with these questions can anyone help me please. 2. On September 2, 2004, a Dan Jones poll based on a random sample of 408 Salt Lake County residents reported that 26% of the respondents thought that Mayor Nancy Workman should

asked by penelope
59. Computers C++

I really need help with this one... 1.) Look at the following declaration. enum Person { BILL, JOHN, CLAIRE, BOB }; Person p; Indicate which of the following statements or expressions is valid. A.) p = BOB; B.) p++; C.) BILL > BOB D.) p = 0; E.) int x =

asked by Thomas
60. college stats

help please!!! 1. The average number of bumped passengers per day on FliRite Airlines is 2.47 with a standard deviation of 1.75. For a random sample of 40 days, what is the chance the average number of bumped passengers in the sample is between 2 and 2.75?

asked by penelope
61. Public policy

Evaluate how public policy decisions affect the receipt of revenues

asked by Asha
62. Calculus

Find the derivative of the function. f(x) = ex8 - 6

asked by Anonymous
63. Geometry

ABCD is a square. If one side of the square measures 2x – 5 inches and the other side measures x + 8 inches, find x.

asked by Anonymous
64. Calculus

Find the derivative of the function. f(x) = text(ln)(9 x^2 - 3 x + 1)

asked by Anonymous
65. Calculus

Find the derivative of the function. f(x) = ln((x6 - 7)6)

asked by Anonymous
66. Calculus

Find the derivative of the function. f(x) = 6 (ln(x))^(5\/2)

asked by Anonymous
67. Calculus

Find the derivative of the function. g(t) = t2 ln(e2t + 9)

asked by Anonymous
68. Calculus

Find the derivative of the function. f(x) = e^x8 - 6

asked by Anonymous
69. Physics

A tennis ball may leave the racket on a serve by a top player with a speed of 45.0 m/s. If the ball's mass is 0.063 kg, and it is in contact with the racket for 0.030 s, what is the average force (in newtons) on the ball?

asked by Zach
70. Physics

A 170 kg astronaut (including space suit) acquires a speed of 2.75 m/s by pushing off with his legs from a 2400 kg space capsule. What is the average change in speed in meters/second of the space capsule?

asked by Ryan
71. Vocabulary

determine whether the definition below is denotative or connotative _____ definitions are subject to indivual interpretation A.denotative b. connotative i think its A

asked by LadyT
72. Chem

I was asked to list materials with different structures and exhibit different properties. I thought of water and salt, muriatic acid and laughing gas. Am I correct? I need two more. Please help.

asked by Kim
73. Math

I am more than 300, but less than 400 . My digits add up to 12 . What number am I?

asked by Ritchell
74. Thermodynamics

1. The total enthalpy of 15.000kg of steam at 2250.000kPa is 34191.510kJ. Determine the dryness of the steam. ANS = % 2. Determine the quantity of heat required, to raise 11.100kg of water at 80.000 degrees Celsius, to saturated steam at 2250.000kPa and

asked by Danny
75. chemistry

calculate the volume of concetrated nitric acid (68%) that is neede to prepare stock solution 0.25M in 1000mL volumetric flask.(dnitric acid=1.513g/cm3)

asked by farah
76. maths

The maximum temperature on Thursday was 18 degree celsius.On Friday it increased by 0.5 degree celsius. It further increased by 2.5 degree celsius on Saturday. What was the minimum temperature on Saturday ?.

asked by kaksha
77. Fundamentals of Management

1 2 3 4 5 6 7 8 9 10 A major contribution that Taylor made to the study of management was to

asked by Rhonda
78. life orientation

provide 5(or more) ways in which you critically discuss how cancer impact on the teenagers

asked by nkosikhona
79. maths

The maximum temperature on Thursday was 18 degree celsius.On Friday it increased by 0.5 degree celsius. It further increased by 2.5 degree celsius on Saturday. What was the minimum temperature on Saturday ?.

asked by kaksha
80. statistics

MBA604 Statistics Assignment 1 Part 1 1) (5 pts) An electronics company is about to launch a new product. If the serial number for each piece produced has the following format: LLNNN where L stands for any letter in the English alphabet and N is a number

asked by austin
81. physics

Tyler flies a spaceship at a constant velocity of 79% the speed of light or 0.790c. Use appropriate units: h for hour, m for meter. Note that β and γ have no units. (a) The value of β = [(v)/(c)] ("beta") is

asked by Anonymous
82. Math

If a circle is drawn that contains all four vertices of a rectangle(24x18) and the area of the circle is k(3.14) square centimeters, what is k?

asked by Anonymous
83. algebra1 HELP PLEASE Thanks you!!

The function gives the speed in feet per second (ft/s) of a free-falling object after it has fallen x feet (ignoring air resistance). FInd the speed of the object after it has fallen 25 feet. If necessary, round your answer to the nearest tenth.

asked by lisa
84. Business Communications - English 101

Should the sentence containing the word three be 3 instead. The rules states to use numbers that follow an identifying noun. I don't quite understand if "these" is considered identifying but I believe two or three should be written in words. If I should

asked by MaryBeth
85. algebra1 HELP PLEASE Thanks you!!

The function f(x)=5 square root of x gives the speed in feet per second (ft/s) of a free-falling object after it has fallen x feet (ignoring air resistance). FInd the speed of the object after it has fallen 25 feet. If necessary, round your answer to the

asked by lisa
86. algebra1 HELP PLEASE Thanks you!!

The formula y=square root 64h can be used to find the velocity v in feet per second of an object that has fallen h feet. Find the velocity of an object that has fallen 25 feet. Round your answer to the nearest tenth.

asked by lisa
87. Chem

What does it mean when they say materials with the same properties but with different chemical composition? Can you give examples so that I can fully understand?

asked by Kim
88. Computers C++ (2)

1.) Assume c is a char variable. What value does c hold after the following statement executes? (Type the answer without quotes.) c = toupper('a');___________ 2.) Assume c is a char variable. What value does c hold after the following statement executes?

asked by Thomas
89. physic PLEASE I REALLY NEED HELP WITH THIS PROBLEM

The formula y=square root 64h can be used to find the velocity v in feet per second of an object that has fallen h feet. Find the velocity of an object that has fallen 25 feet. Round your answer to the nearest tenth.

asked by lisa
90. vocab

______ definitions are made up of the set of associations implied by a word in addition to its literal meaning a connotative b direct c denotative d none of the above i think its A

asked by tammie