Friday

July 3, 2015

July 3, 2015

Number of results: 37,756

**Calculus**

Consider the function f(x)=-2x^3+33x^2-108x+2. For this function, there are three important intervals: (-Inf,A], [A,B], [B,Inf) where A and B are the critical points. Find A and B and for each of the important intervals, tell whether f(x) is increasing or decreasing.
*October 29, 2013 by Nathan*

**math-calc**

Consider the function f(x)= (2x+8)/(6x+3). For this function there are two important intervals: (-inf, A) (A, inf) and where the function is not defined at A . Find A For each of the following intervals, tell whether is increasing (type in INC) or decreasing (type in DEC). ...
*March 13, 2009 by mkcolema*

**Calculus**

7) Consider the function f(x)=x2e4x. For this function there are three important intervals: (−∞,A], [A,B], and [B,∞) where A and B are the critical numbers. Find A and B For each of the following intervals, tell whether f(x) is increasing (type in INC) or ...
*October 20, 2014 by Hailey*

**Calculus**

Consider the function f(x)=ln(x)/x^6. For this function there are two important intervals: (A,B] and [B,∞) where A and B are critical numbers or numbers where the function is undefined. Find A Find B For each of the following intervals, tell whether f(x) is increasing or...
*October 20, 2014 by Hailey*

**CALCULUS**

6. f(x)= 12x^5 + 30x^4 - 160x^3 +4 For this function there are four important intervals:(-inf, A] , [A,B] ,[B,C],[C, inf) where A ,B ,C are the critical numbers. Find A B AND C and at those points do they have a local min, max or neither??
*March 17, 2009 by mkcolema*

**calculus help please**

Consider the function f(x)=2x+9x^1.? For this function there are four important intervals: (-inf,A], [A,B),(B,C), and [C,inf) where A, and C are the critical numbers and the function is not defined at B. Find A= ????? and B= 0 and C =?????
*May 22, 2008 by amy*

**Math**

How do you find decreasing intervals of 6x^3-63x^2-144x-2? I found my increasing intervals from placing the derivatives i just can't seem to solve for the decrease
*November 4, 2014 by Alessandra*

**Calculus**

Consider the function f(x)=4(x−3^2/3. For this function there are two important intervals: (−,A) and (A,) where A is a critical number. Find A
*April 28, 2013 by Ryan*

**Calculus**

Consider the function f(x)=4(x-5)^(2/3). For this function, there are two important intervals: (-Inf, A) and (A, Inf) Where A is a critical number. Find A
*November 5, 2013 by Nathan*

**Math**

Consider the function f(x) = 7 x + 3 {x ^ -1 }. For this function there are four important intervals: (-infinity, A], [A,B),(B,C), and [C,infinity) where A, B and C are either critical numbers or points at which f(x) is undefined. Find A, B and C
*November 7, 2009 by Salman*

**Math Problem (please help)**

Consider the following function. g(x) = 6x^4 − 13x^3 − 144x^2 + 325x − 150 (a) Use the zero or root feature of a graphing utility to approximate the zeros of the function accurate to three decimal places. (Enter your answers as a comma-separated list. Round ...
*September 15, 2014 by Ada*

**Calculus**

Consider the function f(x) = x - lnx. Find the intervals on which f(x) is increasing and the intervals where it is decreasing. Also determine any relative max or min.
*April 20, 2013 by Rene*

**college algebra**

F(X)= -3x^2 -30x-70 what is the vertex what is the axsis of symmetry what are the intercept what is the domain what is the range intervals increase intervals decrease
*November 14, 2012 by zach w*

**Calculus**

Consider the function f (x) = 2x^3 - 3x^2 - 72x + 7 Find and classify the critical points. Identify the intervals of increase and decrease, and state the intervals of concavity.
*May 22, 2014 by Liz*

**Calculus**

Consider f(x)=200+8x^3+x^4. find the intervals on which function is increasing or decreasing, the local max and minimu values, the intervals of concavity and the inflection points
*November 9, 2011 by Ashley*

**math-calc**

for x (-12, 10) the function f is defined: f(x)=x^7(x+2)^2 On which two intervals is the function increasing (enter intervals in ascending order)? Find the region in which the function is positive Where does the function achieve its minimum?
*March 13, 2009 by mkcolema*

**math**

. Given the following function, f(x)=-x^2 -8x find: (a) vertex, (b) axis of symmetry, (c) intercepts, (d) domain, (e) range, (f) intervals where the function is increasing, (g) intervals where the function is decreasing, and (h) the graph of the function. Please show all of ...
*November 10, 2011 by mz tee*

**calc**

Consider the function below. (Round the answers to three decimal places. If you need to use - or , enter -INFINITY or INFINITY.) f(x) = 4 + 4x2 - x4 (a) Find the intervals of increase. (Enter the interval that contains smaller numbers first.) Find the intervals of decrease. (...
*April 3, 2010 by Anonymous*

**calculus**

Consider the function f(x)=12x^5+30x^4160x^3+5 . f(x) has inflection points at (reading from left to right) x=D , E , and F D= E= F=
*November 25, 2008 by greg*

**Calculus**

Consider the function f(x)=xe^2x. Find the intervals on which f(x) is concave up and the intervals where it is concave down. Show a sign graph. Please show work in detail so I can follow for future reference. Thanks!
*April 20, 2013 by anonymous*

**Math**

For x [14,13] the function f is defined by f(x)=(x^3)(x+6)^4 On which two intervals is the function increasing (enter intervals in ascending order)? I got increasing intervals between [-14, -6], but can't find the other increasing interval. I believe it is [-3, 13] but I get ...
*November 24, 2008 by Jay111*

**algebra**

Given the following function, find: (a) vertex (b) axis of symmetry (c) intercepts, (d) domain (e) range (f) intervals where the function is increasing, (g) intervals where the function is decreasing Please show all of your work f(x)=-7x^2-14x-3
*January 18, 2012 by sarah*

**Calculus (pleas help!)**

Consider the function f(x)=12x^5+60x^4−100x^3+4. For this function there are four important intervals: (−INF,A], [A,B] ,[B,C] , and [C,INF) where A, B, and C are the critical numbers. Find A, B, and C. At each critical number A, B, and C does f(x) have a local min...
*March 31, 2011 by Karku*

**Calculus**

I'm asked to find the domain of fuction (x+5)/(x-3) saying that x is all reals except for x can not equal three is wrong correct? Because i can evalue function when x = 3 as follows 3 + 5 = 8 so saying that the function has range x is a reals except x can not equal three is ...
*October 31, 2009 by Calculus *

**Calculus**

1. For the function f(x)=4x^3-30x^2+4: a) Find the critical numbers of f(if any); b) Find the open intervals where the function is increasing or decreasing; and c) Apply the First Derivative Test to identify all relative extrema 2. For the function f(x)=(x-1)^(8/11) a) Find ...
*October 30, 2012 by Rudy*

**calculus**

For x ∈ [−12, 10] the function f is defined by f(x) = x7(x + 1)4 On which two intervals is the function increasing (enter intervals in ascending order)?
*April 10, 2011 by chelsea*

**math**

is this correct then. Why might fuction notations be important? My answer: a function notation shows how x computes based on an equation. The function of x means the given equation a certain value. Such as f(x)=x + 7. For example f(6)=6 + 7. So, f(6)=13 the function equals 13...
*January 15, 2007 by jasmine20*

**calculus**

Consider the function f(x)=12x^5+30x^4300x^3+2. f(x) has inflection points at (reading from left to right) x=D,E, and F. where D is___, E is____, and F is____.
*November 12, 2009 by leah*

**CALCULUS**

Consider the function: f(x) = x/(x^2 + 2) (a) Determine the intervals on which the function is concave up. Enter the leftmost interval first (e.g. (1,2) would come before (3,4)). (b) Determine the intervals on which the function is concave down. Enter the leftmost interval ...
*October 22, 2010 by Help asap!! plz*

**math, algebra**

can someone correct this for me or help me. 6x^2y^3+ 9x^2y^3 divided by 3x^2y^2 my solving and answer is: 15 x x y y y ---------- = 5y 3 x x y y Looks good to me. I've never thought of showing x^2y^3 as xxyyy. That a neat wrinkle. We see quickly that the Xs cancel and all but ...
*December 12, 2006 by jasmine20*

**calculus help**

Produce graphs of f that reveal all the important aspects of the curve. Then use calculus to find the intervals of increase and decrease and the intervals of concavity. f(x)= 1+(1/x)+(5/x^2)+(1/x^3) find the interval of increase. find the interval of decrease. find the ...
*April 16, 2014 by Isik*

**math**

Consider the function g(x)=x/x-7. a) Summarize the increasing and decreasing intervals. b) Compare the slopes of the tangents at the points where i) x=7.5 and x=20 ii) x=6.5 and x=-20
*December 15, 2013 by kavi*

**math**

*Consider the function g(x)=x/x-7. a)Summarize the increasing and decreasing intervals. b)Compare the slopes of the tangents at the points where i) x=7.5 and x=20 ii) x=6.5 and x= -20
*January 6, 2014 by kavi*

**Calculus**

I need help determining the intervals of increase, decrease and the intervals of upward and downward concavity given f prime. f'(x)=(64x^4 - 125x) ^(-2/3). Im not sure how to solve this. I know that the function has no intervals of decrease, its the rest im having trouble with
*October 23, 2014 by Sam*

**math**

Consider the function g(x)=x/x-7. a) Summarize the increasing and decreasing intervals. b) Compare the slopes of the tangents at the points where i) x=7.5 and x=20 ii) x=6.5 and x=-20 Do it for me please...
*December 27, 2013 by Krish*

**pre calc**

The Identity Function The Squaring Function The Cubing Function The Reciprocal Function The Square Root Function The Exponential Functional Lo The Natural Logarithum Function The Sine Function The Cosine Function The Absolute Value Function The Greatest Integer Function The ...
*December 18, 2009 by kim*

**calculus**

For x including [15, 13] the function f is defined by f(x)=x^7(x+4)^6? For x including [15, 13] the function f is defined by f(x)=x^7(x+4)^6 On which two intervals is the function increasing (enter intervals in ascending order)? ( i was able to get the first interval but had...
*May 22, 2008 by amy*

**increasing and decreasing intervals**

Have to find the intervals on which f(x) = 4 - sqrt(x+2) is increasing. Also the intervals on which the function is decreasing. TIA Find the derivative of f(x). When the derivative is positive, the function increases as x increases. When the derivative is negative, the ...
*November 5, 2006 by Jen*

**Calculus**

Consider the function f(x)=2x+6x^(-1). For this function, there are three numbers A<B<C which are either critical or not in the domain of the function. A= B= C=
*December 7, 2013 by Skirby*

**Maths**

Question 1: The gradient of the graph of f(x) at any point is,ax^2-12x + 9, and the point,(2,-3),is an inflection point of f(x). (a) Find the value of the real constant, a. Find the function f(x). (b) Find the stationary points of the function, then specify the intervals on ...
*May 10, 2008 by Victoria*

**Calculus (urgent!!)**

Consider the function f(x)=12x^5+60x^4−100x^3+4. For this function there are four important intervals: (−INF,A], [A,B] ,[B,C] , and [C,INF) where A, B, and C are the critical numbers. Find A, B, and C. At each critical number A, B, and C does f(x) have a local min...
*April 1, 2011 by Karku*

**Math**

How would you write open intervals for concavity? After you find the second derivative of a fuction; How would you go about finding the concavity
*November 10, 2013 by Mercy*

**calculus**

f(x)=2x+8x^-1.For this function there are four important intervals: (-infinity,A],[A,B),(B,C), and [C,infinity) where A,B and C are either critical numbers or points at which f(x) is undefined.Find A,B and C.
*November 8, 2009 by zama*

**Calculus**

Suppose you know that f(x) is an odd functon on the domain of all real numbers and that the function is concave up on the intervals 0 < x < 3 and 5 < x and concave down on the interval 3 < x < 5. List ALL intervals on which the functon f(x) is concave up and ALL...
*November 19, 2011 by Mishaka*

**Algebra: factoring**

I need to find the value of x. 9x^3 + 9x = 30x^2 It's confusing because apparently I have to do 9x^3 + 9x and then add the + 30x^2 to it, and then make it equal 0, so it ends up like this: 9x^3 + 9x + 30x^2 = 0 And afterward, I would factor it. How do you factor it? I'm having...
*December 4, 2008 by Rachelle*

**Math **

For the function y= (ax+b)/(cx+d) write the intervals where the function is increasing and intervals where it is decreasing. X intercept= -b/a Y intercept= b/d Vertical asymptote: x=-d/c Horozontal asymptote: a/c
*March 31, 2014 by Hyde *

**Fuction Notations**

how might fuction notations be useful in my every day life?
*January 21, 2007 by Sam*

**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 the second derivative ...
*December 7, 2013 by Lindsay*

**Calculus PLEASE HELP**

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 the second derivative ...
*December 7, 2013 by Lindsay*

**graphing exponential function**

P(x) = -(x-a)^4 (x-b)^3 (x-c) where a>0, b<0, c>0, a<c How do I sketch a graph of this? Thanks First you put the points a, b and c on the x-axis, doesn't matter precisely where, as long as it satisfies the conditions: a>0, b<0, c>0, a<c. Then you use ...
*February 10, 2007 by Jen*

**CALCULUs**

For all x in the interval [-11,13] the function f is defined by x^3(x+3)^4 On which two intervals is the function increasing? Find the region in which the function is positive
*November 21, 2008 by james*

**math**

Given the fuction y = log3(x+3)+2, calculate the zero of the function. GIve an exact answer.
*December 12, 2009 by Cyn*

**Calculus**

Function f(x)= e^-x^2 a) Inflection Values b) Intervals on which f(x) is concave downward c) Intervals on which f(x) is concave upward.
*March 29, 2011 by Anonymous*

**Polynomials**

The circular area of the drum is (9x^2+30x+25)pi. What is the smallest diameter it can have? (9x^2+30x+25) (3x+15) (3x+15) 3(x+5) 3(x+5) 9(x+5) 9x+45 <--------
*January 10, 2015 by Lucina*

**calculus**

2. Consider the function f defined by f(x)=(e^X)cosx with domain[0,2pie] . a. Find the absolute maximum and minimum values of f(x) b. Find the intervals on which f is increasing. c. Find the x-coordinate of each point of inflection of the graph of f.
*January 2, 2012 by Yoona*

**calculus**

2. Consider the function f defined by f(x)=(e^X)cosx with domain[0,2pie] . a. Find the absolute maximum and minimum values of f(x) b. Find the intervals on which f is increasing. c. Find the x-coordinate of each point of inflection of the graph of f.
*January 2, 2012 by Yoona*

**Engineering Calculus**

f(x)=((6x-3)/(x+6)) how do you find the intervals of decreasing and increasing...I found that there were no critical points yet I was also correct that the function increased (-I,-6) and (-6,I). I was wrong that there were no decreasing intervals though.
*April 28, 2012 by Cheallaigh*

**Algebra**

Convert the simplified parabolic equation y=3x^2-30x-7 to standard form. 3x^2-30x-7 3x^2 -30 x -7 +75 -75 3(x^2 -10x + 25) -82 3(x-5)^2 -82 or y = 3(x-5)^2 -82 check that.
*March 16, 2007 by Aubrey*

**Calculus **

Consider the function f(x)=(x^2)e^(14x) f(x) has two inflection values at x = C and x = D with C≤D where C is and D is Finally for each of the following intervals, tell whether f(x) is concave up or concave down. (−∞,C]: [C,D]: [D,∞)
*October 28, 2014 by Hailey*

**College Algebra**

Here is the whole question... I have figured most of it out but I need help with part (b)(f) and (g)... Maybe you also check the work I have already done Given the following function, find: (a) vertex, (b) axis of symmetry, (c) intercepts, (d) domain, (e) range, (f) intervals ...
*January 4, 2012 by Sunny*

**criminology**

Why is it important to consider inversely the nexus between theory and policy? It is far more important to consider writing skills and clarity of communication. Can you possibly explain the meaning of consider inversely the nexus? Hmmm. "... consider inverseley the nexus...
*March 23, 2007 by chris*

**math help please**

Consider the function g(x)=x/x-7. a) Determine an equation for the vertical asymptote. b) State the domain. c) Determine an equation for the horizontal asymptote. d) State the range. e) Sketch the function. ( i will do it) f) Summarize the increasing and decreasing intervals. ...
*December 11, 2013 by & John &*

**psy265**

What are three components of attractiveness? Which of the three is most important to you? Why did you choose this factor? Consider, as you respond to your classmates posts, how their responses have had an effect on your views about attractiveness
*December 8, 2009 by trudy*

**calculus**

Is this a correct answer, I'm trying to integrate the marginal revenue function to get the function for total revenue. R'(x)=(30/(2x +1)^2)+30 =R(x)=(-15/2x+1)+30x
*April 13, 2010 by Cheryl*

**Inflection points**

Consider the function f(x)=12x^5+30x^4300x^3+2. f(x) has inflection points at (reading from left to right) x=D,E, and F. where D is___, E is____, and F is____. I took the second derivative of the function and got 120x(2x^2+3x-15). From that I set it to equal and tried finding...
*November 17, 2009 by Kay*

**Education**

What do you consider to be three important positive qualities a teacher should possess?
*January 12, 2014 by BJ*

**ACC220**

select a management fuction (planning, directing and motivating,or controlling)and explain how that function relates to business as a whole.
*October 7, 2008 by cliff*

**Calc**

f(x) = x^2 / (x - 7)^2 (a) Find the vertical and horizontal asymptotes. x= y= (b) Find the interval where the function is increasing. Find the intervals where the function is decreasing. (Enter the interval that contains smaller numbers first.) (c) Find the local minimum value...
*November 16, 2009 by Bobby*

**Calculus**

Consider a differentiable function f having domain all positive real numbers, and for which it is known that f'(x)=(4-x)x^-3 for x>0. A. Find the x-coordinate of the critical point of f. Determine whether the point is a relative maximum, a relative minimum, or neither for ...
*May 7, 2015 by Sarah*

**math,algebra**

why are function notations important, are they really that important in todays world. Why do make math difficult. what are function notations i don't understand why they are important. 1934.3847569
*December 27, 2006 by jasmine20*

**Algebra**

I need help trying to put the correct vocabulary words when solving this problem such as grouping, factor, prime factor, GCF, and perfect square, and please check and see if I am doing this correctly. 15x^2+31x+2 In my last problem I will be using the ac method A*C = 15*2 = ...
*August 10, 2014 by Lisa*

**calculus**

Consider the function f (x)=x1=5(x��4). This function has two critical numbers A < B Find A and B For each of the following intervals, tell whether f (x) is increasing (type in INC) or decreasing (type in DEC). (-inf;A]: [A;B]: [B;inf) The critical number A is...
*March 19, 2012 by Mandy*

**FP101**

List three steps in buying a home. What are some important points to consider in your purchase?
*January 20, 2011 by Anonymous*

**Statistics**

Compare the 95% and 99% confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs. 95% confidence intervals: 6.214, 7.686 99% confidence intervals: 5.944, 7.956
*October 5, 2011 by Hope*

**Statistics**

Compare the 95% and 99% confidence intervals for the hours of sleep a student gets. Explain the difference between these intervals and why this difference occurs. 95% confidence intervals: 6.214, 7.686 99% confidence intervals: 5.944, 7.956
*October 5, 2011 by Hope*

**Math - Trig please help!**

State two intervals in which the function y=7sin(1/5x)+2 has an average rate of change that is: a) zero b)a negative value c)a positive value Please explain how to get the intervals! Thanks a lot in advance!
*December 5, 2011 by linda*

**Math**

find any stationary points of the function g(x) = (2x-3)square root of 5+16x-4x^2 (0 less than or equal to x less than or equal to 4) and use the first derivative test to classify each stationary point as a local maximum or local minimum of g(x) this is how far i have got with...
*September 14, 2010 by Pd*

**Math - Int Trig**

31) Locate, name, and classify the extrema of the function. Determine intervals which the function is increasing and decreasing f(x) = -x(x^2 - 2) 32) Determine the end behavior of the function f(x) = 2x - x^3
*May 16, 2014 by Lilly*

**trig**

use the function G(x)=x^3-8x +1 b) identify and verify the y intercept of G c) estimate the zeros of G to the nearest tenth d) estimate the coordinates of the relative extrema of G to the nearest hundredth e)in what intervals is G positive? Negative? f) in what intervals is G ...
*November 12, 2008 by jerson*

**Math**

For homework we're supposed to give all the properties of different functions. I was able to do all of it except for this one greatest integer function - f(x) = -1/2 [x-1] These functions always mess me up! Could someone tell me the following properties of this function. ...
*September 19, 2006 by Rosanna*

**Calc 1**

Consider the function below. f(x) = (x^2)/(x−9)^2 (a) Find the vertical and horizontal asymptotes. x=? y=? (b) Find the interval where the function is increasing. (Enter your answer using interval notation.) Find the interval where the function is decreasing. (Enter your...
*April 24, 2015 by TayB*

**Pre- Calc**

Determine if the fuction is a power function. If it is, then state the power and constant of variation. f(x)=4x^(-3/5)
*December 19, 2012 by Mayra*

**pre-calculus**

is the function of f(x)=x^2-4x even, odd, or neither? oh and on what intervals is the function of f(x)=|x+1|+|x-1| increasing?
*October 3, 2008 by aelisha*

**Algebra**

I need help trying to put the correct vocabulary words when solving this problem such as grouping, factor, prime factor, GCF, and perfect square, and please check and see if I am doing this correctly. 15x^2+31x+2 In my last problem I will be using the ac method A*C = 15*2 = ...
*August 10, 2014 by Lisa*

**calculus**

Find the points at which the following function is discontinuous.Indicate the intervals at which the function is continuous. f(x)= (x^2 if x<-1), (|x| if -1<x<=1), (3x+1 if 1<x)
*October 7, 2011 by David*

**Algebra**

2(3x - 7) + 4 (3 x + 2) = 6 (5 x + 9 ) + 3 how will solve it? well you first multiply it out: 6x-14+12x+8=30x+54+3 you combine like terms 18x-6=30x+57 -12x=63 x=-63/12
*May 22, 2007 by James*

**ALGEBRA**

If I divide 28x^3-30x^2-67x-21 BY 7x+3...will I get 4x^2-10x-21? THEN 28x^3-30x^2-21THEN 14x^2-15x^2-21???? PLEASE HELP!!!
*February 25, 2010 by GGIFT*

**math**

Sam emptied his coin bank and made a bar graph of the numbers of each type of coin the interval he was 5 coins If graph showed 5 intervals of quarters, 2 intervals of dimes,3 intervals if nickels and 10 intervals of pennies what was total amt of money in bank Please help
*September 24, 2013 by Daniel mom *

**find the intervals**

How to find the intervals on which the following function is a)increasing b)decreasing c)concave up d)concave down. y = 2x, x < 1 2 - x^2, x >= 1 Thank you.
*November 11, 2006 by Jen*

**math**

For f(x) and g(x) given below, find the following, f(x) = (x-1)^5, g(x)=1-6x a) (f of g)(x)= -7776x^5 b) (g of f)(x)= -6x^5+30x^4-60x^3+60x^2-30x+7 c)f(f(x)= d) f^2(x)=(f*f)(xx)= Im stuck on c and d
*June 15, 2015 by tracy*

**high school calculas**

Find the (a) the local extrema, (b) the intervals on which the function is increasing, (c) the interval on which the function is decreasing h(x)=2/x
*November 6, 2008 by pipi*

**calculus**

Find the extreme values of the function for the given intervals. 2x^3 21x^2 + 72x a) [0,5] b) [0,4] I have both the minimum values for both intervals which is 0. But I am unable to find the maximum. please help!!!
*March 13, 2011 by Abdullah*

**Calculus (final question I promise)**

1. Use calculus and algebraic methods to do a complete analysis (i.e., intercepts, critical points, intervals of increase and decrease, points of inflection, intervals of concavity, local maximum or minimum points) for each of the following functions and then sketch the graph ...
*July 28, 2008 by Derek*

**Math**

Describe the intervals on which the following function is continuous. If not continuous, state "where" the discontinuity occurs and state the TYPE of discontinuity. f(x)= (x^2-x-12)/(x^2-6x+8) I just don't understand how to find the intervals. Thanks~
*August 20, 2013 by Lindsay*

**math **

Find the complex zeros of the polynomial function, and write f in factored form: f(x)= x^3 - 8x^2 + 30x - 36
*August 21, 2013 by sheila*

**statistics**

use SPSS to calculate the 90%, 95% and 99% confidence intervals for the mean of the variable weight. Interpret the three confidence intervals in terms of whether there is a significant difference between the mean of the sample and a hypothesized mean of 150.
*June 29, 2014 by love*

**Math**

Manny is a plumber and charges $50 when he visits a client and $30 per hour for every hour he works. His bill can be expressed as a function of hours, x, with the function f(x)= 50 +30x. Which statement explains the meaning of the inverse of the function? A)Total bill as a ...
*July 23, 2008 by Haru*

**Calculus**

Can you check my answer? Solve the separable differential equation: dy/dx=(sqrt(x))/2y y=(2/3)x^(3/4) Let f be the function given by f(x)=x^3-5x^2+3x+k is a constant. a) On what intervals is f is increasing? (-oo,1/3), (3,oo) b) On what intervals is the graph of f concave ...
*November 18, 2007 by Anonymous*

**calculus**

For the function f(x)=x^3e^x, determine intervals of increase and decrease and the absolute minimum value of f(x) To do this I found the derivative which is f'(x)=3x^2e^x. Then I set it to zero: f'(x)=0 0=3x^2e^x How would I isolate x? And when I do, I would sub that x value ...
*April 29, 2015 by Sara*

**math (binomial exp)**

the Q is : Given that (1+ax)^n = 1 + 30x +375x^2+.... find the values of the constants a and n . I know that : (i am writing (n 1) as the coefficient of n) (n 1) *ax = 30x (n 2) *(ax)^2 = 375x^2 which can be written as (n 1)* a = 30 (n 2)*a^2 = 375 I solved this only by ...
*October 19, 2009 by Gemini*