math analysis

Most popular questions
1. MATH ANALYSIS

How do i do this? According to Kepler's Laws, planets have elliptical orbits, with the sun at one of the foci. The farthest Pluto gets from the sun is 7.4 billion kilometers. The closest it gets to the sun is 4.4 billion kilometers. Find the equation of

asked by anonymous on December 7, 2009
2. Math Analysis

what are the two critical points for r=4cos( 4(theta)) and its symmetries. As well as for r=2+2sin(theta)?

asked by cindy on February 23, 2013
3. Math Analysis

What is the apparent size of an object 1 cm long held 80 cm from your eyes? ==> When they say "apparent size", they mean the angle from which one object is viewed by, say, a person (or in this case a pair of eyes). I thought I'd be able to find the angle

asked by Emily on January 6, 2010
4. Math analysis

How do I simplify cscx-cotxcosx?

asked by Lauren on April 15, 2010
5. MATH ANALYSIS

How should this be done? Suppose you have 132 m of fencing with which to make two side-by-side rectangular enclosures against an existing wall. if the rectangular enclosures are adjacent and of the same depth what is the maximum are that can be enclosed?

asked by anonymous on December 9, 2009
6. MATH ANALYSIS

What are a couple of examples of multivariable functions used in real life??

asked by anonymous on October 26, 2009
7. Math Analysis

From a ship off-shore, the angle of elevation of a hill is 1.1°. After the ship moves inland at 4.5 knots for 20 min, the angle of elevation is 1.4°. How high is the hill? (1 knot = 1 nautical mile = 6080 ft per hour) As I was just about to get the

asked by Emily on March 2, 2010
8. MATH ANALYSIS

How should this be done? Suppose you have 132 m of fencing with which to make two side-by-side rectangular enclosures against an existing wall. if the rectangular enclosures are adjacent and of the same depth what is the maximum are that can be enclosed?

asked by anonymous on December 9, 2009
9. MATH ANALYSIS

how do you find the function csc 225 degrees without using a calculator?

asked by anonymous on January 7, 2010
10. math analysis

Two airplanes leave an airport at the same time. one travels in the direction of 38 degrees at 140mph and the other travels in the direction of 350 degrees at 180mph. After two hours, how far apart are they? Thanks

asked by jenas on April 14, 2015
11. Math Analysis

3.Each day the average toddler needs to consume 900 to 1700 calories. At most 30% of a toddler's total calories should come from fat. Describe the number of fat calories and total calories for the diet. Is a toddler following a healthy diet if s/he

asked by Emily on October 5, 2009
12. MATH ANALYSIS

how do i evaluate the function csc 11 pie/4 without using a calculator

asked by anonymous on January 8, 2010
13. Math Analysis

5. The bacteria population doubles every 10 hours. How long will it take to triple the initial amount? (Use log 3 / log 2 = 1.585) ==> I thought you could use the formula A(1/2)^(t/h), but I don't know... Any help is GREATLY appreciated!! :D

asked by Emily on November 16, 2009
14. Math Analysis

Let f(x)= x^3, g(x) = sqrt x, h(x) = x-4, and j(x)= 2x. Express the following function k as a composite of three of these four functions. k(x)= sqrt (x^3 - 4) Do I need to factor anything out of the parentheses or something? If you can, please explain this

asked by Emily on October 14, 2009
15. Math Analysis

6. Prove that f(x) = (3/4)x^4 + 2 and g(x) = (4sqrt(108x-216))/3 are inverses. I know you solve it with composite functions f(g(x)) and g(f(x)), and I solved f(g(x)), but I can't seem to solve g(f(x)) to equal x, like it should. Can someone show me how to

asked by Emily on October 24, 2009
16. Math Analysis

Given f(x) as shown, graph the following: [the line is going through (-2,-3) and (2,0)] 1. f(x) + 2 ==> My graph I have is a line going through the points (-2,-1) and (2,2). Is this correct? 2. 2f(x) ==> Can someone help me with this one please? I thought

asked by Emily on October 20, 2009
17. MATH ANALYSIS

How do you simplify these questions?: 1. cos^2(x/2)-sin^2(x/2) 2. 2cos^2(3A)-1 3. sin 2x/1+cos2x I think number 3 is tan 2x? The other two I don't know. Thanks for the help

asked by anonymous on May 25, 2010
18. MATH ANALYSIS

how do i evaluate the function csc 11 pie/4 without using a calculator

asked by anonymous on January 7, 2010
19. Math Analysis

31. Radioactive decay of material is determined using the formula N = Noe^-kt. Find the constant k for Plutonium-239 given that its half-life is 24,390 years. ==> I don't really get where to start here because the problem does not give you how much

asked by Emily on December 10, 2009
20. Math Analysis

lim x-->infinity (3x^2+4x-5)/(6x^2+3x+1)

asked by B on September 29, 2011
21. Math Analysis

(3.) The plane 2x + 3y – 4z = 5 intersects the x-axis at (a,0,0), the y-axis at (0,b,0), and the z-axis at (0,0,c). The value of a + b + c is?

asked by B on September 29, 2011
22. Math Analysis

Can someone help me with this problem, please? Thanks!! "A ship leaves port and sails for 2 hours northeast and then 3 hours northwest. If the speed remains constant, what course should the ship take home?"

asked by Emily on May 25, 2010
23. MATH ANALYSIS

What is the approximate horizontal distance traveled by a soccer ball that is kicked at an angle of 30 degrees with an initial speed of 60 feet per second?

asked by anonymous on January 10, 2010
24. math analysis

verify tan x/2=secx /secxcscx+cscx

asked by sam on February 15, 2015
25. math analysis

how many faculty of each rank should be hired at each college to exactly meet the demand for sections and completely exhaust the salary budget Rank table. Lecture. Instrutor Section taught. 3. 4 annual salary. 20. 25 (Thousands \$) Table. Community college

asked by gracy on March 15, 2012
26. Math Analysis

Can someone check my answers please? Thank you! If tan x = 3/5, evaluate: 1) tan 2x 2) tan 3x ==> For #1, I got 15/8; for #2, I got -99/5. Are these answers correct?

asked by Emily on May 24, 2010
27. Math Analysis

Tell if the function is symmetric with respect to the x-axis, y-axis, and origin. 3. 8x^2 - 2y^2 = 12 ==> I got that it was symmetric to both the x- and y-axes. Is this right? 4. 5x^2 - 3y^2 = 18 ==> I can't get anywhere with this equation -- I'm getting

asked by Emily on October 19, 2009
28. Math Analysis

How would I solve: x^4=81

asked by jon on December 15, 2007
29. math analysis

(1/a)+(2/a^2)=0 Solved for zero I'm unsure about the process to solve this, when I do it like my teacher says, it doesn't work. This is for an online advanced math class in which you get three tries to solve the problem. I have already used two. Any help

asked by Hunter on August 23, 2015
30. math analysis

A rectangle with its base on the x axis is to be inscribed under the positive portions of the graph of y=8-x^2 . Write an equation for the area of the rectangle which uses only the variable x.

asked by sarah on October 31, 2011
31. Math analysis

I have a problem that says to Use the laws of logarithms to expand and simplify the expression. ln(x(x + 1)(x + 2)) .. I keep getting ln(x)+ln(x^2+3x+2) but I'm wrong. What im i doing incorrectly?

asked by Claudia on October 10, 2010
32. math analysis

How o you solve 4sinxcosx=1 ???

asked by anonymous on May 3, 2010
33. Math Analysis

What is the approximate horizontal distance traveled by a soccer ball that is kicked at an angle of 30 degrees with an initial speed of 60 feet per second? a) 84 ft b) 88 ft c) 93 ft d) 97 ft e) 105 ft ==> I tried solving it by solving for x in the

asked by Emily on January 10, 2010
34. Math Analysis

4. Find f(x) + g(x) when f(x) = x^(1/2) and g(x) = 6x^(1/2). ===> I got the square root of 7x. Is this right? 16. Find f(x)/g(x) when f(x) = (2x)^(1/2) and g(x) = 2*(sqrt2)*x^(1/3). ===> I got (sqrt2x) / (3*cubertx), but I definitely don't think this is

asked by Emily on October 12, 2009
35. math analysis

How do you find the zeros in the equation: x^3-x^2-5x+2 in a graphing calculator

asked by itzel on September 15, 2009
36. math analysis

How do you find the zeros in the equation: x^3-x^2-5x+2 in a graphing calculator

asked by itzel on September 15, 2009
37. math analysis

is (x^2-5) a factor of x^4-3x^2-1?

asked by Chelsea on January 11, 2009
38. Math Analysis

How would I simplify: i^57

asked by jon on December 15, 2007
39. Math Analysis

How would I solve: x-1/x+2 is greater than or equal to x/x-2

asked by jon on December 15, 2007
40. math analysis

how would I simplify: -3i^4

asked by greg on December 15, 2007
41. math analysis

((x+3)/(x-5))+(5/(x-3)) Simplify I've done this twice and got it wrong both times I have two more problems similar to this and don't want to continue until I understand how to do it.

asked by Hunter on August 24, 2015
42. math analysis

also i don't understand this problem. i need help and to prove....the symbol ⊂ is subset. here the problem: Prove that There exist an open interval B = (c,d), and sets A and C, with B ⊂ C, and a function f: A-->C such that f^(-1)(B) is not an open

asked by Vylette on October 21, 2013
43. math analysis

i don't know what it mean "~" Exercise: Describe the practical meaning of ~(p v q) using sentences.

asked by cosette on September 4, 2013
44. math analysis

Disprove: For every integer a, if 8 divides a, then 6 divides a. im still stuck. i wrote: Disproof. Suppose 8|a. by definition of divisibility, we know 8|a means there is an integer b with a=8b. There is not value of y.

asked by cosette on September 4, 2013
45. Math Analysis

Find the exact value of cos(x/2) if sin x = 3/4 and x is in quadrant II. ==> I got ã(4-ã7)/2. Is this correct?

asked by Emily on May 3, 2010
46. MATH ANALYSIS

I need help solving this problem algebraically, but I need to learn step by step!! Thanks so much cos 2x=cos x How do I do it?

asked by anonymous on May 2, 2010
47. Math Analysis

How do I simpllify 1-sin^2x/1-cos^2x?

asked by Lauren on April 15, 2010
48. MATH ANALYSIS

If (96,2) is a point on the terminal side of an angle THETA in standard position, what is the value of sin THETA? How do i do this?

asked by anonymous on January 10, 2010
49. MATH ANALYSIS

how would you minimize this: ln 10- ln 5- 1/3ln 8?

asked by anonymous on November 18, 2009
50. Math Analysis

The solution of 5x>2x is?

asked by Becky on February 18, 2008
51. Math Analysis

A quartic polynomial Q(x) with real coefficients has zeros 2+i and 3-2i, find the other two zeros.

asked by Justin on January 27, 2008
52. math analysis

i don't know what to start. Given a number espilon >0, prove there exists a natural number x such that 1/x

asked by victoria on September 28, 2014
53. math analysis

i need help.. im not really sure how to start. There exist an open interval A=(x,y), x set B, and a function f:A-->B such that f(A)≠ f(x),f(y).. prove

asked by Vylette on October 21, 2013
54. Math analysis

If the function f is defined by f(x)= 1/xcubed (x cubed only), then f(8x)=?

asked by Oacar on April 25, 2012
55. math analysis

how do i do cosecant x= 30/150? and how do i do cosecant x= 1500/9000

asked by paige on January 9, 2011
56. Math Analysis

Use the half-angle formula to find the exact value of cos(x/2) when tanx = -5/8 and x is in quadrant IV. (| is a radical) ==> I got sqrt((89 + 8sqrt(89))/178). Is this correct? I hope my answer is easy to read..

asked by Emily on May 3, 2010
57. math analysis

how do you solve sinx=cosx??

asked by Itzel on May 2, 2010
58. Math Analysis

When simplifing 1/a-3 - 1/3-a do I procede by multi. by the recipercal or would I just set them equal to each other.

asked by Greg on December 15, 2007
59. Math Analysis

Which is equivalent to 6-i/2i

asked by jon on December 15, 2007
60. math analysis

what is the domain, range, and zeros of the function: g(t)= root 9-t?

asked by Anonymous on October 8, 2009
61. Math Analysis

Find two rational expressions that have a sum of 9-9x/x^2-9 I need steps not just answers

asked by Mary on October 12, 2008
62. Math Analysis

How do I solve: 4x^3 is less than x

asked by jon on December 15, 2007
63. Math Analysis

Which is equivalent to 5+i/1+3i

asked by jon on December 15, 2007