Search: math The function D(x) models the cumulative numbe

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math The function D(x) models the cumulative numbe
Thge function D(x) models the cumulative number of deaths from a disease x years after 1984. Estimate the year when ther were 89,000 deaths. D(x) = 2386x^2 +5147x + 5398. there were approximately 89,000 deaths in the year?
Saturday, June 18, 2011 at 7:36pm by willa

algebra
THE FUNCTION D(X) MODELS THE CUMULATIVE NUMBER OF DEATHS FROM A DISEASE X YEARS AFTER 1984. ESTIMATE THE YEAR WHEN THERE WERE 90,000 DEATHS D(x)=2010X^2+5400X+5774
Sunday, July 3, 2011 at 6:37pm by joseph

science
Why are models useful? a) models work exactly like the things they present b) Models are the first stage in any experiment c) models are better than charts or graphs d) models are the first step in creating a prototype
Monday, February 15, 2010 at 9:22pm by JADEN

engineering
Engineers analyze things with models, either physical models, or math models. It saves a lot of time and money to do this.
Tuesday, April 3, 2012 at 8:21pm by bobpursley

Math
Find the number of each kind of object in the collection Curt has 12 models in all. Three of the models are airplanes. Curt has 5 more models of cars than boats. How many models of cars does Curt have?
Friday, March 1, 2013 at 7:36pm by TJ

Math
Sam has 9 models. Bill has twice as many models as Jim. Jim has three less models than Sam. Show how to find the difference between the number of models Bill has and the number of models Sam has.
Tuesday, April 19, 2011 at 3:35pm by Jaer

Math
For a cumulative histogram, you need the cumulative frequency, but values can be calculated from the frequency.
Wednesday, May 15, 2013 at 6:10pm by PsyDAG

Math
When constructing a cumulative histogram do you use the frequency or cumulative frequency
Wednesday, May 15, 2013 at 6:10pm by Kiki

MATH
The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=-42x^2+924x+14,112, where x=1 corresponds to 2001, and so on until x=11 corresponds to 2010. Find the number of cumulative car accidents in 2003. Use the table of values to ...
Sunday, April 29, 2012 at 1:54am by ANGEL

fractions: models
Give examples of three categories of fraction models. What real models have you used that correspond to each of these?
Sunday, March 16, 2008 at 11:06pm by Ashley

math - another ? - exponentials
The two formulas f(t) = Pa^t and f(t) = Pe^rt provide two models for the same exponential growth or decay function. How are the exact values of a and r related? (Hint: Find a formula for a as a function of r)
Friday, November 4, 2011 at 7:17am by Anil

MATH
You stated the frequency in weeks 1,2,3. For cumulative, you add in the previous weeks. For instance, cumulative frequency in week 2 is (9+13)
Tuesday, September 30, 2008 at 5:00pm by bobpursley

math The function D(x) models the cumulative numbe
D(x)=2386x^2+5147x+5398=89000 2386x^2+5147x+5398-89000=0 2386x^2+5147x-83602=0 If you don't know solve that equation in google type: quadratic equation online When you see list of results click on: Free Online Quadratic Equation Solver:Solve by Quadratic Formula When page ...
Saturday, June 18, 2011 at 7:36pm by Anonymous

Math
A random variable X has a cumulative distribution fnc given by 0 for a<0 G(a)={a^2 for 0<=a<1 1 for a>=1 find the probability density function.
Wednesday, March 25, 2009 at 6:11pm by Julie

advanced functions math
You buy a car in 2005 for $7860 and it depreciates linearly. You sell the car for $5040 in 2011.... what does the domain represent in the function? what does the range represent in this function? what is the slope of the linear representation? what is the function that models ...
Tuesday, September 18, 2012 at 10:12pm by Samantha

algebra
Specialty t-shirts are being sold online for $30 plus a one-time handling fee of $2.75. The total cost is a function of the number of t-shirts bought. What function rule models the cost of the t-shirts? Evaluate the function for 5 t-shirts.
Thursday, September 27, 2012 at 11:56am by kayla

math
Suppose that x and y vary inversely and that y=1/6 when x = 3. Write a function that models the inverse variation and find y when x = 10.
Thursday, May 27, 2010 at 8:37am by Skye

algebra
Speciality t shirts are being sold online for $30 plus one time handling fee of $2.75. The total cost is a function of the number of t shirts bought. What function rule models the cost of the t shirts? Evaluate the function for t shirts. Can someone please help
Monday, September 10, 2012 at 9:31pm by jay

math
A poster is 12 inches longer than it is wide. Find a function that models its area A in terms of its width w.
Friday, October 5, 2012 at 12:45am by monic

algebra
creat a graph for the function that models the percentage of adulat height attained by a boy who is years old. then creat a graph for the function that models the percentage of adulat height attained by a girl who is years old.
Sunday, March 10, 2013 at 5:29am by louise

Business
You may find this site useful as you consider one of your local companies and its business model. http://digitalenterprise.org/models/models.html
Friday, February 15, 2008 at 12:54pm by Ms. Sue

math
A rectangle has an area of 15 m2. Find a function that models its perimeter P in terms of the length x of one of its sides.
Friday, October 5, 2012 at 12:46am by monic

math
The Wellbuilt Company produces two types of wood chippers, Deluxe and Economy. The Deluxe model requires 3 hours to assemble and ½ hour to paint, and the Economy model requires 2 hours to assemble and 1 hour to paint. The maximum number of assembly hours available is 24...
Monday, February 25, 2008 at 8:05pm by Mike

Math
The Wellbuilt Company produces two types of wood chippers, Deluxe and Economy. The Deluxe model requires 3 hours to assemble and ½ hour to paint, and the Economy model requires 2 hours to assemble and 1 hour to paint. The maximum number of assembly hours available is 24...
Monday, February 25, 2008 at 6:54pm by Mike

psych
what are the psychoanalytic models? How have these models been used to explain human behavior? Which models do you feel is teh most effective explaining human behavior and why?
Wednesday, October 6, 2010 at 7:31pm by diana

Math - Linear Inequalities
The Wellbuilt Company produces two types of wood chippers, Deluxe and Economy. The Deluxe model requires 3 hours to assemble and ½ hour to paint, and the Economy model requires 2 hours to assemble and 1 hour to paint. The maximum number of assembly hours available is 24...
Monday, February 25, 2008 at 4:49pm by Tushar

Math
I looked at that sight and can see the tables but what I have is a table that show the heights of students in a class males on top females on bottom with heights out beside them. I have to make a cumulative frequency table from the data in my collumns I have, height,frequency ...
Friday, September 12, 2008 at 6:17pm by Charlie

math
The volume of a cone is 190 in3. Find a function that models the height h of the cone in terms of its radius r.
Friday, October 5, 2012 at 12:47am by monic

Precalc Repost
The function P(t) = 120 + 30 sin (2πt) models the blood pressure (in millimeters of mercury) for a person who has a blood pressure of 150/90 (which is high); t represents seconds. What is the period of this function?
Sunday, March 7, 2010 at 8:01pm by Maytas

math
The graph shows the cost C in dollars to rent a car for one day as a function of the number m of miles driven. Which of the following functions models the situation?
Saturday, December 1, 2012 at 2:02pm by Jonathan

math
The sum of two positive numbers is 90. Find a function that models their product P in terms of x, one of the numbers.
Friday, October 5, 2012 at 12:47am by monic

math
What are algebraic models? There's a problem and it says to use an algebraic models to answer the questions. I don't know what those are?
Tuesday, October 13, 2009 at 10:21pm by lily

Math
Hydra are small freshwater animals. They can double in number every two days in a laboratory tank. Suppose one tank has an initial population of 60 hydra. When will there be more than 5000 hydra? How can a table help you identify a pattern? What function models the situation...
Saturday, January 21, 2012 at 8:20pm by Jane

math
Hydra are small freshwater animals. They can double in number every two days in a laboratory tank. Suppose one tank has an initial population of 60 hydra. When will there be more than 5000 hydra? How can a table help you identify a pattern? What function models the situation (...
Saturday, January 21, 2012 at 1:33pm by Jane

precalculus
Using data from past years, the economists for smith brothers inc determined that the revenue f the company can be modeled by the function R(x)=0.0125x^2+412x. In addition, the function C(x)=12225+0.00135x^2 models the total cost of doing business, where x us v the number of ...
Wednesday, April 10, 2013 at 12:12am by starlight

Math
You are in a car of a ferris wheel. The wheel has a radius of 8m and turns counterclockwise. Let the orgin be at the center of the wheel. Begin each sketch in parts a) and b) when the radius from the centre of the wheel to your car is along the positive x-axis. a) Sketch the ...
Wednesday, March 6, 2013 at 6:22pm by Kristien

geometry
Find a function that models the area A of a circle in terms of its circumference C.
Thursday, October 8, 2009 at 10:51pm by David

Maths
The Wellbuilt Company produces two types of wood chippers, Deluxe and Economy. The Deluxe model requires 3 hours to assemble and ½ hour to paint, and the Economy model requires 2 hours to assemble and 1 hour to paint. The maximum number of assembly hours available is 24...
Monday, February 25, 2008 at 4:04pm by Tushar

science
I dont like the choices. d) is probably the best answer, but models are useful because it helps us clarify our thinking on a process or system. Models can be altered rather cheaply, and they can help us realize the variables and the effects of the variables. Wind Tunnel models...
Monday, February 15, 2010 at 9:22pm by bobpursley

math
A right triangle has one leg four times as long as the other. Find a function that models its perimeter P in terms of the length x of the shorter leg.
Friday, October 5, 2012 at 12:47am by monic

math
The number of bedrooms of homes in a certain community is shown on the table below. (a) Find the cumulative distribution for the table. Number of Bedrooms Percent Cumulative 0 2% 1 .% 1 8% 2 .% 2 24% 3 .% 3 35% 4 .% 4 21% 5 .% 5 7% 6 .% 6 or more 3% 7 .% (b) Find the mean for ...
Wednesday, August 29, 2012 at 5:02pm by Anonymous

algebra
A certain office can purchase a photocopier for $5600 with a maintenance fee of $15 a month. On the other hand, they can rent the photocopier for $95 a month (including maintenance). If they purchase the photocopier, each copy would cost 3¢; if they rent, the cost is 6&...
Friday, May 3, 2013 at 1:40am by Maho

MODELS NUMBER
DRAW MODELS FOR THE NUMBERS BELOW 324
Monday, September 10, 2012 at 8:07pm by BRIANA

Math
Height: The volume of a cone is 100 in³. Find a function that models the height h of the cone in terms of its radius r.
Friday, October 9, 2009 at 10:21am by David

math
Height: The volume of a cone is 100 in^3. Find a function that models the height h of the cone in terms of its radius r.
Friday, October 9, 2009 at 9:23am by David

math
The height of a cylinder is three times its radius. Find a function that models the volume V of the cylinder in terms of its radius r.
Friday, October 5, 2012 at 12:46am by monic

Probability
Suppose a random variable X has a cumulative distribution function given by F(a) = {0 for a<0, 1/2 for 0<=a<1, 3/5 for 1<=a<2, 4/5 for 2<=a<3, 9/10 for 3<=a<3.5, 1 for 3.5<=a. a. Find the probability mass ...
Wednesday, January 21, 2009 at 8:40pm by Julie

ALGEBRA
WHICH FUNCTION LINEAR EXPONENTIAL OR QUADRATIC BEST MODELS THIS DATA (-1,3),(1,3),(3,27),(5,75),(7,147)
Wednesday, May 19, 2010 at 9:52pm by miranda

Math
number of standard models --- x number of enhanced models --- 35-x solve for x 325x + 385(35-x) = 12575
Saturday, May 11, 2013 at 2:19pm by Reiny

algerbra 2
3. Write the function R that models the total number of components that reenter the atmosphere around the earth each year.
Tuesday, December 18, 2012 at 8:32am by lindsay

Math
This site may help you. http://www.onlinemathlearning.com/cumulative-frequency-table.html
Friday, September 12, 2008 at 6:17pm by Ms. Sue

business accounting
just a general discussion on motivational models and theories and how the Maslow model is similar to or different from other models.
Wednesday, February 9, 2011 at 12:13pm by Denese

math
suppose that oil spilled from a tanker and spreads in a circular pattern whose radius increases at a constant rate of .5 feet per second. -find a function f that models the radius of the oil spill as a function of time r=f(t) with t measured in seconds. How long before the ...
Monday, March 11, 2013 at 10:36pm by Crystal

precal
Given an initial value of 17 g, which is halving once each 32 hours, an exponential function in term of hour t which models this situation is ...?
Sunday, June 12, 2011 at 8:29pm by k

Precalc Repost
Hello, I'm trying to figure out how to do this problem, but don't know where to begin. I think some information is missing. Blood Pressure: The function P=120+30Sin 2pi(t) models the blood pressure (in millimeters of mercury) for a person who has a high blood pressure...
Sunday, March 7, 2010 at 8:01pm by Phillip

pre-calc
Hello, I'm trying to figure out how to do this problem, but don't know where to begin. I think some information is missing. Blood Pressure: The function P=120+30Sin 2pi(t) models the blood pressure (in millimeters of mercury) for a person who has a high blood pressure ...
Sunday, March 7, 2010 at 5:46pm by Phillip

math
Chester builds and collects models of boats and planes. He has 22 models all together chester has 8 more planes than he has boats. How many of each kind of model does he have?
Monday, October 15, 2012 at 5:21pm by lesley

Probability
A random variable N has a cumulative distribution function given by F(x)={ 0 for x<1 0.2 for 1<=x<2 0.5 for 2<=x<3 0.8 for 3<=x<4 1 for 4<=x Find the mean of N.
Sunday, February 1, 2009 at 10:32pm by Julie

math
chester builds and collects models of boats and planes. He has 22 models altogether. Chester has 8 more planes than he does boats. How many of each kind of model does he have?
Thursday, October 18, 2012 at 4:40pm by Anonymous

math
A barrel contains 163 gallons of paint and is being drained at a constant rate of 12 gallons per minute Write an equation that models the number of gallons, g, after t minutes The equation that models the given situation is
Sunday, November 4, 2012 at 11:20pm by gail

Math
The bar graph shows the cumulative number of death form AIDS in the US, from 1990 through each of the years 1996-2002. The data in the graph can be modeled by the following polynomials, in which f(x) and g(x) represent the cumulative number of AIDS deaths x years after 1990 F(...
Thursday, May 17, 2012 at 1:34pm by Anonymous

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 ...
Friday, December 18, 2009 at 11:09am by kim

fraction
Give examples of three categories of fraction models. What real models have you used that correspond to each of these? I pretty much understand the first part of this question: I know that the three models are set model, length or measurement model and region or area model. ...
Monday, March 17, 2008 at 10:06pm by Ashley

math
Suppose the income (in tens of thousands of pesos) of employees at University X can be approximated by a continuous distribution with density f(x) = ( 2x􀀀2; if x 2 0; if x < 2 Find the probability that a randomly chosen employee has an income between ...
Friday, October 26, 2012 at 7:36pm by vilma

math
what does cumulative mean
Wednesday, April 25, 2012 at 3:43pm by gabby

math
how do you do cumulative frequency?
Sunday, October 12, 2008 at 8:29am by alyssa

math
In 2000,the population of Arizona was 5 million and growing continuously at a rate of 3.1% per year. Write a function f that models Arizona's population in millions x years after 2000.
Thursday, June 16, 2011 at 11:01am by Amanda

Calculus
Suppose that p(x) is the density function for heights of American men, in inches, and suppose that p(69)=0.22. Think carefully about what the meaning of this mathematical statement is. (a) Approximately what percent of American men are between 68.7 and 69.3 inches tall? b) ...
Friday, October 28, 2011 at 12:08am by Cesar

Math
how do you do this? i don't get it. The drama club plans to attend a professional producion. From 10 to 35 students will go. There is a one-time handling fee of $3. Each ticket costs $25 plus a $2 surcharge. Write a linear function that models this situation. describe a ...
Monday, March 16, 2009 at 8:27pm by Angie

Science
A class made models of a graduated cylinder using plastic cups. Describe how your team can test the accuracy of these models for measuring volume. List the steps in your procedure.
Monday, April 21, 2008 at 10:32pm by Nicole

math
A woman 5 ft tall is standing near a street lamp that is 12 ft tall. Find a function that models the length L of her shadow in terms of her distance d from the base of the lamp.
Friday, October 9, 2009 at 12:15am by David

English
I'm still confused, so does it mean that "retrograde role models" would be bad role models?
Thursday, October 1, 2009 at 7:11pm by Anonymous

math
Deshawn has five base-ten blocks. She models a number that is less than 999. The number she models has a zero in tens place and a zero in the ones place. What number is she modeling?
Wednesday, August 29, 2012 at 6:44pm by mythreyee

chem
Some observed phenomena that could not be predicted by the current models, or is in conflict with the current models.
Wednesday, January 7, 2009 at 4:18pm by bobpursley

math
this is dealing with line plots: if you have a box that has the following in it: number of clay models made by art club members in may 8 6 6 6 2 5 8 8 5 5 4 6 6 3 7 models in may then you have a line graph as such: <-1--2--3--4--5--6--7--8-> how would you solve ...
Wednesday, March 14, 2007 at 10:03pm by monica

math
Economicsts frequenly use linear models as approximations fpr more complicated models. In Keynesian macroeconomics theory, total consumption expendiure on goods and services, C, is assumed to be a linear functions of national income, I. The table gives the values of C, and I ...
Wednesday, November 8, 2006 at 10:40am by fefe

algebra
A 3-mi cab ride costs $3.00. A 6-mi cab ride costs $4.80. Find a linear equation that models cost c as a function of distance d. write your linear equation using function notation.
Wednesday, January 13, 2010 at 3:18pm by marc

MATH
I HAVE LOOKED AT THE CUMULATIVE FEQUENCY TABLE EXAMPLE, AND I AM STILL CONFUSED ABOUT HOW TO MAKE MY OWN TABLE. MY TABLE IS FOR SOCCER LEAGUE SIGN-UPS AT SCHOOL. I HAVE A GIVEN CHART OF WEEK 1, WEEK 2 AND WEEK 3. ON WEEK ONE, THERE WERE 9 SIGN-UPS. ON WEEK 2, THERE WERE 13 ...
Tuesday, September 30, 2008 at 5:00pm by LOGAN

Math
How do you make a cumulative frequency table
Friday, September 12, 2008 at 6:17pm by Charlie

math
In 2000 the population of a state was 5 million and growing continuously at a rate of 3.4% per year. a) Write a function that models the state’s population in millions x years after 200. b) Graph f in 0,10,1 by 4,7,1 c) Estimate the state’s population in 2007.
Thursday, April 19, 2012 at 6:04pm by angel

Algebra
Which kind of function best models the data in the table? Use differences or ratios. x y 0 1.7 1 6.8 2 27.2 3 108.8 4 435.2 A.linear B.quadratic C.exponential D.none of the above I think it is C...?
Monday, March 11, 2013 at 7:55pm by Cassie

algebra
In 2000, 49% of the residents in a large city regularly used newspapers for getting news and this has decreased at an average rate of approximately 1.3% per year since then. Find a linear function in slope-intercept form that models this description. The function should model ...
Tuesday, September 11, 2012 at 8:32am by Bob

Algebra
If some one can get me started, I should be able to graph this. MONTGOMERY COUNTY COMMUNITY COLLEGE MAT106 SUMMER, 2007 ASSIGNMENT #1 NAME______________________________ The Wellbuilt Company produces two types of wood chippers, Deluxe and Economy. The Deluxe model requires 3 ...
Wednesday, May 30, 2007 at 1:52pm by Jason

pre-calculus honors
GENERATE A FUNCTION THAT MODELS THE SITUATION. Consider the type of function described—it is not linear! A shipping company charges $4 for the first pound and $3 for each additional pound or part thereof. As you try to come up with the equation, consider the following: -...
Thursday, December 17, 2009 at 7:15pm by annemarie

math
I know for the simplest TI-30, they have an INV button and for later models they have a 2ND function button, but here is my suggestion .4 ± x 9 = INV or 2ND ln = x 7 you should get .191266..
Thursday, November 4, 2010 at 3:05pm by Reiny

Pre-Calculus
SMALL-SAMPLE CONFIDENCE INTERVAL FOR A POPLATION MEAN 90% Confidence Interval = x-bar +/- 1.65 * s/SQRT(n) n = NUMBER OF SAMPLES [3] Cumulative Distribution Function Student's t distribution with 3 DF x P( X <= x ) 1.65 0.901247
Sunday, October 26, 2008 at 2:46pm by Kate

Algebra 1
Look for a pattern in each table of values to determine which model best describes the data. Then write an equation for tue function that models the data. X: -1, 0, 1, 2, 3 Y: 6, 0, 6, 24, 54
Wednesday, November 2, 2011 at 9:27pm by Austin

Math
Create a function that closely gives the graph given in the link. The function may be a piecewise function but it does not necessarily have to be a piecewise function. a. Give a brief narrative explaining what you did to create your function. b. List your function. The link is...
Monday, February 27, 2012 at 2:35pm by Fatih

Math
How would you rewrite the equation y = 3x+1 as a function of x. Hmmm. It is written now as a function of x. Do you mean like this, where x is a function of y? x= 1/3 y -1 ? Could this be a trick question? I thought It was already a function of x? Thanks for your help!
Sunday, May 6, 2007 at 10:52pm by Erin

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