Thursday
July 31, 2014

Posts by janet


Total # Posts: 327

Calculus
The area bounded between the line y=x+4 and the quadratic function y=(x^2)-2x. Hint: Draw the region and find the intersection of the two graphs. Add and subtract areas until the appropriate area is found. I found the intersection points as (-1,3) and (4,8). I'm not sure w...

Calculus
Thanks.

Calculus
Find the limit. lim x-->1 (x^3)-1/((5x^2)+2x-7) Please show steps.

calculus
Quadratic function written in standard form where a, b, and c are constants such that a is not zero. f(x)= ax^2+bx+c Using calculus find the vertex of the parabola formed by this quadratic function. Determine under what conditions this vertex is a maximum or minumum (using Cal...

math
Suppose a state lottery prize of $2 million is to be paid in 20 payments of $100,000 each at the end of each of the next 20 years. If money is worth 9%, compounded annually, what is the present value of the prize?

Algebra
Use the five steps for problem solving to answer the following question. Show all work. Andrew is having an irrigation system installed in his yard. Company A charges $1250 plus $15 per sprinkler head. Company B charges $1200 plus $17 per sprinkler head. How many sprinkler hea...

Calculus--Please help.
Carry on with the problem.. To find maximum profit, not revenue, would I take the derivative of the profit function, which I have as Profit=125*(12L+29L^2-1.1^3)-7000L. If I take the derivative of this(which I'm not sure I did right) my L=16.78 or .79. If I plug it back in...

Calculus--Please help.
1. So this is the answer I got 12L+29L^2-1.1L^3=0 L(12+29L-1.1L^2)=0 L=0, 26.77, -0.41 The minimum number of laborers would be 0. The maximum number of laborers would be 26.77. THe range would then be (0,26.77) because when I substitute a number >26.77 into the above equati...

Calculus--Please help.
I really need help, this is my second post. Information to solve problems Q=12L+29L^2-1.1L^3 Q= # of cars produced/year L=# of laborers used per year for production Each car sells for $125. $7000 per laborer per year is cost for labor and other consumable materials. Questions:...

Calculus
Information to solve problems Q=12L+29L^2-1.1L^3 Q= # of cars produced/year L=# of laborers used per year for production Each car sells for $125. $7000 per laborer per year is cost for labor and other consumable materials. I attempted some parts of these questions and some par...

Calculus
Find any absolute max/min and local max/min for the function f(x)=x^3-4x+5 on the interval [0,5). Made sure to prove that these points are max/min values. This is what I did so far. f'(x)=3x^2-4=0 3x^2=4 x= 2/sqrt3 The -2/sqrt3 is outside of interval so can't use. x=2/...

Calculus
The position in meters of a particle is given by f(t)= 14t-3t^2, where t is measured in seconds. a) Evaluate f'(2) and interpret the results. This is how I solved this. f'(t)=14-6t= 2(7-3t) f'(2)=2(7-3(2))= 2 This means the velocity of the particle is 2 m/s when t=...

accounting
(TCO 8) Partial balance sheets for ABC Company and additional information are provided below. ABC Company, Partial Balance Sheets, As of December 31 2009 2008 Equipment $100,000 $75,000 Accumulated depreciation (25,000) (20,000) Common stock, $5 par 180,000 100,000 Paid in ca...

Calculus
Bosnian, Thanks for your help. I just want to make sure I understand. The local min and max are the same f(2/sqrt3) = 1.92 Are there any absolute maximum or minimum? Thanks again.

Calculus
Find any absolute maximum and minimum and local maximum and minimum for the function f(x)=x^3-4x+5 on the interval [0,5). Make sure to prove that these points are max/min values. THis is what I did. f'(x)=3x^2-4=0 x= +/- 2/sqrt3 -2/sqrt3 is outside of interval so just use ...

Calculus
Use Newton's Method to approximate the root of the function f(x)=e^x-5x when the intial point chosene is x1=1.5. Do two iterations. This is what I did, but not working. f'(x)=e^x-5 x2=1.5 - (e^1.5-(5(1.5))/e^1.5 -(5)) =1.5-(4.4817-7.5/4.4817-5)=1.5-5.8234= -4.3234 x3=-...

Calculus
let f(x)=x^3(e^-x) Answer using calculus, use graphing calculator only to check work. a) Find the local and global extrema of f. b) Find the intervals where f is increasing/decreasing. c) Find the inflection points of f. d) Find the intervals where f is concave up/down. e) Fin...

calculus
The length of a rectangle is decreasing at the rate of 2 cm/sec, while the width w is increasing at the rate of 3 cm/sec. At what rate are the lengths of the diagonals changing at the instant that l=15 cm and w= 8 cm? Are the diagonals increasing or decreasing in length at thi...

math
i am a relflex angle. all the digits in my angle measure are even. all of my digits are different. all three of my digits are factors of 8. my tens digit is greater than my one digit. what is my measure?

chemistry
24. Hydrogen peroxide can decompose to water and oxygen according to: 2H2O2 (l) + -----------> 2H2O (l) + O2 (g) ^ H = -196 kJ What is the enthalpy change accompanying the reaction of 5.00 g H2O2 (l) according to the above mentioned reaction ?

chem
24. Hydrogen peroxide can decompose to water and oxygen according to: 2H2O2 (l) + -----------> 2H2O(l)+ O2 (g) ^ H = -196 kJ What is the enthalpy change accompanying the reaction of 5.00 g H2O2 (l) according to the above mentioned reaction ?

Calculus
Sorry I don't understand how to get the second derivative, I gsolved the first derivative already

Calculus
I need help with finding first and second derivative--simplify your answer. Y=xtan(x) I solved first derivative xsec^2(x) + tan(x) I don't understand how to get the first...can someone show me the steps with explanation?

calculus
Did I do this problem right? Find the first and second derative-simplify your answer. y=xtanx y'= (x)(sec^2 x)+(tanx)(1) y'= xsec^2 x + tanx y"= (x)(2secx)(secxtanx)+sec^2 x + sec^2 x y"=2xsec^2 x tanx + 2 sec^2 x

calculus
I plug in the numbers into the formula that I used, but I don't get the same answer. Here's what I did, maybe you can tell me what I did wrong. (likely a dumb algebra mistake) f"(x) = lim-->0 f'(x+h)-f'(x)/h =(1/4(x+h)+1)^2 - (1/4x+1)^2/h =(1/16x^2+32xh...

calculus
To solve the first step I used the equation f'(x)=lim h-->0 f(x+h)-f(x)/h Can I use this same formula to solve for the second derivative?

calculus
Find the first and second derivative - simplify your answer. y=x/4x+1 I solved the first derivative and got 1/(4x+1)^2 Not sure if I did the first derivative right and not sure how to do the second derivative.

Maths
A television set is on sale for $780 cash, or 25% deposit and $85 per month for 8 months. How much can be saved by paying cash? How much is charged in interest? Calculate the annual rate of simple interest charged? Working out please:)

calculus
I solved this problem, can someone check it to make sure I did it right. There are two parts to this intrepation and estimate of the value. Let C(t) be the total value of the US currency (coins and banknotes) in circulation at time, t. The table gives values of this function f...

english
Hi I need help and I appreciated it. am kind of confused and dont what to write. I have to do journal where I see, read, explore, observe about Intersecionality. How can I start writing about this? Thanks

Physics
Steel is very stiff, and the Young's modulus for steel is unusually large, 2.0×1011 N/m2. A cube of steel 25 cm on a side supports a load of 85 kg that has the same horizontal cross section as the steel cube. What is the magnitude of the "normal" force that...

History
how did the rest of the US feel about war with mexico?

Calculus
the first 2 is centered on the division line which has x-2/(sqrt2)-2. I think I placed the brackets right??

Calculus
No it only has the sqrt x. The -2 is outside of the sqrt. Just so I know. Had it all been under the square root would I have multiplied the top and the bottom by that sqrt(x-2)?

Calculus
The problem is lim --> 2 for g(x) which is 2((x-2/(squareroot x)-2)) I just substituted 2 in for x and 2((2-2)/(squareroot 2)-2) = 0 This doesn't look right. It seems like I'd need to try something different. Can someone tell me if it's right or wrong? And if th...

calculus
The problem is lim --> 2 for g(x) which is 2((x-2/(squareroot x)-2)) I just substituted 2 in for x and 2((2-2)/(squareroot 2)-2) = 0 This doesn't look right. It seems like I'd need to try something different. Can someone tell me if it's right or wrong? And if th...

calculus
The problem is lim --> 2 for g(x) which is 2((x-2/(squareroot x)-2)) I just substituted 2 in for x and 2((2-2)/(squareroot 2)-2) = 0 This doesn't look right. It seems like I'd need to try something different. Can someone tell me if it's right or wrong? And if th...

calculus
The problem is lim --> 2 for g(x) which is 2((x-2/(squareroot x)-2)) I just substituted 2 in for x and 2((2-2)/(squareroot 2)-2) = 0 This doesn't look right. It seems like I'd need to try something different. Can someone tell me if it's right or wrong? And if th...

calculus
The problem is lim --> 2 for g(x) which is 2((x-2/(squareroot x)-2)) I just substituted 2 in for x and 2((2-2)/(squareroot 2)-2) = 0 This doesn't look right. It seems like I'd need to try something different. Can someone tell me if it's right or wrong? And if th...

calculus
Evaluate the limits without using a calculator. Justify all steps in the solutions. lim x-->0 x^7cos(3/x)

Calculus
I figured this out this way but am not sure it's right. f(2) + 4(2) = f(2) + 8. From this we can tell that it exists, but I'm not sure why.

Calculus
If a function f(x) is continuous, then what can be said about the value of the following limit lim-->2 [f(x) +4x]

calculus
Evaluate the limits without using a calculator. Justify all steps in the solutions. lim x-->0 x^7cos(3/x)

calculus
This is what I tried. g(x) = 2((x-2/(squareroot x)-2)) lim --> 2 I just substituted 2 in for x and 2((2-2)/(squareroot 2)-2) = 0 This doesn't look right. It seems like I'd need to try something different.

calculus
Use the function given to answer the following questions. g(x)= 2 x-2/(squareroot x)-2 The first 2 is set in the middle of the division line. I think signifying that you solve the x-2/(squareroot x)-2 first then multiple everything by 2. problem to solve is lim-->2 g(x)

calculus
Thank you so much for your help!!

calculus
Sorry MathMate, The anonymous answer above was mine. Just on a different computer.

calculus
I'm really unsure of how to treat the cos(x/3). YOu stated about that the domain for sin, cos is all real numbers. Would it be (-infinity, infinity) for both domain and range?

calculus
Find the domain and range of the given functions. 1. h(x)= (squareroot4x+1)+3x-5 2. f(x)=3cos(x/3)-1 3. g(x)= log (x+2) Can someone show me the steps to figure the above problems?

calculus
I assume it's a jump since it jumps from one value to another.

calculus
Find the discontinuities of the given function. Classify them as a point discontinuity or a jump discontunuity. g(x)= x, x<-3 5x/(x^2-4x), x>= -3

english
there is some unknown poet called M.T. Buckley whom seems to be known only to the the English teachers and himself. Wrote a poem called "Birthday" and some others like "Poem of Poems" that didn't make it into the whose who of Poets. Does anyone know abo...

World History
The Crimean war was fought by

World History
even greater than their use of human food, fish oil are a vital source of a. lotion and cream b. fertilizer c. lamp oil d. industrial lubricants

Algebra- is my answer right
oh I see what I get. thanks

Algebra- is my answer right
The function g is defined by g(x)=3x^2+6. Find g(5y) Algebra - drwls, Friday, February 4, 2011 at 11:07am 3*(5y)^2 + 6 = __? Algebra - Janet, Friday, February 4, 2011 at 3:56pm I get 75y+6

Algebra
I get 75y+6

Algebra
The function g is defined by g(x)=3x^2+6. Find g(5y)

Algebra
Thank you

Algebra
Suppose H(x)=(sqrt5x+3). Find two functions f and g such that (fog)(x)= H(x) . f(x)= g(x)= Neither function can be the identity function. (There may be more than one correct answer.)

Cochise College
3.88 kl

social studies- geography
75% of the active volcanoes are found along the west coast of N. America and east coast of Asia to New Zealand and is often called:

social studies-geography
the st. lawrence seaway connects these two bodies of water

english
Hi I have some questions and I would really if you answer my questions! I want to be Nurse Practitioner and I am very passion about it. But I have a lot of problems. First English is not my native language, second I am not good at math, third I am kind intimidated by the nativ...

English
My son has to identify stressed syllables with an accent mark and boldface for example forgot,because,daughter.can you help me??

4th grade math
what is the directions for algebra functions rule for input and output in adding e. g. rulr= add 2 2/7

Statistics
Quality Progress, February 2005, reports on the results achieved by Bank of American in improving customer satisfaction and customer loyalty by listening to the "voice of the customer". A key measure of customer satisfaction is the response on a scale from 1 to 10 to...

precalculus
Use the Intermediate Value Theorem and a graphing utility to find intervals of length 1 in which the polynomial is guaranteed to have a zero. Use the root feature of a graphing utility to approximate the zeros of the function. h(x)=x^4-10x^2+2

MATH
Permutation For a segment of a radio, a disc jockey can play 7 songs. If there are 13 songs to select from, in how many ways can the program for this segment be arranged? Question # 2 A corporation has ten members on its board of directors. In how many different ways can it el...

art
to receive proper training and gain access to commissions, artists during renaissance generally had to join a??

soc 120/phi 103
PHI 103 Critical Thinking Quiz 100% 1. A recent study of 100 employees from six departments of a major corporation found 65% to be sleep deprived. The researchers concluded that the majority of corporate employees are sleep deprived. The researcher’s conclusion is suspect...

Physics
Tom pushes a 50 kg up a ramp. The ramp is 6 m long and is set at a 15 degree angle. Starting with an initial speed of 1 m/s, Tom begins pushing the box up with a force of 250N. What will the final speed of the box be at the top?

geometry
In triangle ABC, the lenght of AB is 24. In the triangle, a soccession of midsegments are formed. How do you find the nth stage?

World History
what were the reasons rome fell? four facts about each :]

English
between hobbes and locke whose philosophy would creon follow ? antigone?

World History
Thanks A lot :)

World History
I think it was over time because of all the obstacles they would have to overcome to modify to that environment

World History
How did people modify to their environment in the Mohenjo-Daro?

social economics
Does international law work? In what situations is it most effective? In what situations is it least effective?

statistic
rank the following in increasing order and find the position and value of the 11th percentile show all work. 7 5 3 2 9 6 4 3 8 5 5 8

Algebra1
What is the answer to 8-(-n)=1? I have tried to figure this out, and I can't.

U.S. History
how are you guaranteed a trial if you are accused of a crime against the federal government?

college-accounting
Home Depot and Lowes Home Improvement

English
Thank you guys so much!!

English
Need help with Synecdoche is a "figure of speech" in which a part is used for a whole, or the reverse. Please help with the following especially with School and Hand. This is what I have so far. Thanks! 1) Jackson has a strong arm: Meaning is, Throws well? 2) Joe has...

science
what affects KE?

Managerial Economics
# of Fisherman Daily Tuna Catch 0 0 1 50 0.02 2 110 0.02 3 300 0.01 4 450 0.01 5 590 0.01 6 665 0.01 7 700 0.01 8 725 0.01 9 710 0.01 Suppose market price of tuna is $3.50/lb. How many fisherman should the company use if the daily rate is $100?

Math
How to solve for x? (x/(x+1))+ ((2x-2)/x) = -1/(x+1) can someone show it step by step so i can understand it? Thanks!

Managerial Economics
Q=-5200 - 42P+20Px+5.21+0.20A+0.25M (2.002) (17.5) (6.2) (0.09) (0.21) R2 = 0.55 n=26 F=4.88 P = Price of Product = 500 Px = Price of leading competitor product=600 I = Price per capita = 5,500 A = monthly ependitures = 5000 a = Compute elasticities for each varilable

Economics
Price Qs Qd Surplus or Shortage $6.00 30000 0 $5.00 35000 $4.00 40000 $3.00 45000 $2.00 50000 $1.00 55000 -20000 Shortage Q=65,000 - 10,000 P Q = -35,000 + 15,000 P

Managerial Economics
Price Qs Qd Surplus or Shortage $6.00 30000 0 $5.00 35000 $4.00 40000 $3.00 45000 $2.00 50000 $1.00 55000 -20000 Shortage Q=65,000 - 10,000 P Q = -35,000 + 15,000 P Fill in the table

Managerial Economics
Skateoards sell for $70. During the past year they sold 4,000 skateboards. The company beleives that the price elasticity for product is -2.5. If it decreases the price to $63, what would be the quantity sold?

adult education
Qd=65,000-10,000 (P) Qs= -35,000 + 15,000 (p) What is the equilibrium price?

physics
a-642,648.7029 ft.lb b- 823.9085934 W

algebra
The width of a rectangle is fixed at 11cm. What lengths make the permeter greater than 96m?

Business
Write a 200- to 300- word response to the following question. Do you think that businesses effectively use these resources to communicate? Why or why not?

Pre Algebra
Solve the problem. Round to the nearest unit. 161 is 48% of what?

Geometry
How many lines of symmetry does the letter "X" have and how mnay lines of symmetry does a twelve sided cross figure have?

English
I also have to describe Cyrano de Bergerac's personality-all I can think of that it is flamboyant,charismatic, poetically inclined, arrogant yet timid and fearful in love and holds true to his belief system to his own demise. Is any of that correct?

English
I have to describe Cyrano de Bergerac's physical traits but the only things I can find through Act III is his large nose, moustache, air of arrogance, and his white plume hat-are there any more physical traits-I've spent the last half hour attempting to find any thing ...

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