Friday

May 29, 2015

May 29, 2015

Total # Posts: 367

**MATH**

A frustrated office worker throws his laptop out of his business’s high-rise office building. The height, h, in meters of the laptop above the ground at t seconds can be modelled by h(t)=125=125-5t^2 Estimate the instantaneous rate at which the laptop hits the ground.
*July 19, 2013*

**MATH**

sorry the equation is h(t)=125=125-5t^2
*July 19, 2013*

**MATH**

A frustrated office worker throws his laptop out of his business’s high-rise office building. The height, h, in meters of the laptop above the ground at t seconds can be modelled by 2 h(t) 125 5t . Estimate the instantaneous rate at which the laptop hits the ground.
*July 19, 2013*

**MATH**

f(x)=3x+2 g(x)=-2x+1 a) Write an equation for ( f+ g)(x) b) Determine (f+g)(6) c) Determine (fg)(6) d) Determine the domain of (f/g)(x)
*July 19, 2013*

**MATH**

(1)/(sin(x)-cos(x))=cos(x)+sin(x)
*July 19, 2013*

**MATH**

in radians what would the .46 be?
*July 19, 2013*

**MATH**

2tan^2x-tanx-1=0 0<x<2pi •MATH - Steve, Thursday, July 18, 2013 at 11:48am (2tanx+1)(tanx-1) = 0 tanx = -1/2 or 1 ... Recall in which quadrants tanx is positive or negative ....................would x= 5pi/6,11pi/6,pi/4 and 5pi/4???
*July 19, 2013*

**MATH**

2tan^2x-tanx-1=0 0<x<2pi
*July 18, 2013*

**MATH**

A Ferris wheel completes one revolution every 90 s. The cars reach a maximum of 55 m above the ground and a minimum of 5 m above the ground. The height, h, in metres, above the ground can be modeled using a sine function, where t represents time, in seconds. Assume ride starts...
*July 18, 2013*

**MATH**

Explain the difference between cos^-1x and (cos x)^-1
*July 15, 2013*

**MATH**

Determine an equation of a sinusoidal function that has a maximum at (5, 4) and a minimum at (2, -10).
*July 15, 2013*

**MATH**

so ould it be sin pi.6 and tan pi/6??
*July 15, 2013*

**MATH**

solve for theda given 0<theda<2pi cos theta= - (sqrt 3)/ 2
*July 15, 2013*

**MATH**

Consider the expression logbase5 a=n a) For what value(s) of a will n be a positive number? b) For what value(s) of a will n be a negative number? c) For what value(s) of a will n be undefined?
*July 15, 2013*

**MATH**

For what value(s) of x does logbase2 (logbase3 (logbase4 x))=0
*July 15, 2013*

**MATH**

Consider the expression logbase5 a=n a) For what value(s) of a will n be a positive number? b) For what value(s) of a will n be a negative number? c) For what value(s) of a will n be undefined?
*July 15, 2013*

**MATH**

Given that x=logbase3 5 and y=logbase3 2 , rewrite logbase3 60 in terms of x and y.
*July 15, 2013*

**Calculus**

Evaluate the integral below by interpreting it in terms of areas. In other words, draw a picture of the region the integral represents, and find the area using geometry. ç6 −6 36−x^2dx
*July 15, 2013*

**Calculus**

For the function f described by the following table, estimate ç40 0 f(x)dx using the following. Enter each answer as a sum to show your work. 5 left rectangles 5 right rectangles 5 midpoint rectangles x 0 4 8 12 16 20 24 28 32 36 40 y 7 -46 -50 45 -7 -26 23 -3 18...
*July 15, 2013*

**Calculus**

Consider the function f(x)=(8)/(x^2)−(8)/(x^5) . Let F(x) be the antiderivative of f(x) with F(1)=0. Then F(2) equals ?
*July 15, 2013*

**Calculus**

Find the point on the line 7x+5y−2=0 which is closest to the point (−6,−2).
*July 15, 2013*

**Calculus**

A rancher wants to make a rectangular pen to house her animals. She will divide it up with 3 fences down the middle parallel to one side. If she has 14000 ft of fencing to work with, what are the dimensions of the pen of greatest area? Width = Length = What is the greatest ...
*July 13, 2013*

**Calculus**

Find the point on the line 7x+5y−2=0 which is closest to the point (−6,−2).
*July 13, 2013*

**Please help with Calculus problem??**

A particle moves with a fixed acceleration 3 m/s^2. If its initial velocity is s(0)=0: a) Find its velocity function. b) How long does it take for the particle to reach the velocity 14 m/s^2? c) Find the distance the particle traveled when its velocity reaches 14 m/s^2.
*July 10, 2013*

**Calculus**

Find the absolute maximum and the absolute minimum values of f(x)=x−7cos(x) on the interval [−ð,ð).
*July 7, 2013*

**Calculus**

Gravel is being dumped from a conveyor belt at a rate of 10 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal. How fast is the height of the pile increasing when the pile is 16 feet high? Recall that ...
*July 5, 2013*

**Please help with Calc problem??**

Sorry, I meant a television camera is positioned 2500 ft from the base of a rocket launching pad. The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also the mechanism for focusing the camera has to take into account ...
*July 3, 2013*

**Please help with Calc problem??**

The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also the mechanism for focusing the camera has to take into account the increasing distance from the camera to the rising rocket. Let's assume the rocket rises ...
*July 3, 2013*

**Calculus**

A television camera is positioned 2500 ft from the base of a rocket launching pad. The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also the mechanism for focusing the camera has to take into account the increasing ...
*July 1, 2013*

**Calculus**

Two cars start moving from the same point. One travels south at 60 mph and the other travels west at 25 mph. At what rate is the distance between the cars increasing 2 hours later? Let x = the distance covered by the south traveling car. Let y = the distance covered by the ...
*June 28, 2013*

**Calculus**

A television camera is positioned 2500 ft from the base of a rocket launching pad. The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also the mechanism for focusing the camera has to take into account the increasing ...
*June 28, 2013*

**Calculus**

Let y=e^(x/9). a) Find the differential dy. dy = b) Evaluate dy if x=0 and dx=−0.03. dy =
*June 26, 2013*

**Math**

How would you do this problem. What is the growth rate of the stock with a $3.00 expected dividend and a $20.60 price with 15%required return?
*June 21, 2013*

**math**

R. H. Bruskin Associates Market Research found that 30% of Americans do not think that having a college education is important to succeed in the business world. If a random sample of five Americans is s selected, find these probabilities. (a) Exactly two people will agree with...
*June 20, 2013*

**Calculus**

The motion of a spring that is subject to dampening (such as a car's shock absorber)is often modeled by the product of an exponential function and a sine or cosine function. Suppose the equation of motion for a point on such a spring is s(t)=3∗e^(−2t)sin(3ð...
*June 18, 2013*

**Calculus**

Find the outside and inside functions of the following to find their derivatives: 1) sqrt(2x+9) 2) cos(cos(x)) 3) tan(x) I already know how to find their derivatives I'm just not exactly sure what parts of the chain rule equation would be considered the outside and inside.
*June 18, 2013*

**Calculus**

For what values of x with 0¡Üx¡Ü2¦Ð does the graph of f(x)=x+4sin(x) have a horizontal tangent?
*June 18, 2013*

**Calculus**

Find the equation of the tangent line to the curve y=2tan(x) at the point (pi/4,2).
*June 18, 2013*

**Calculus**

Sketch a graph of the parabola y=x^2+3. On the same graph, plot the point (0,−6). Note there are two tangent lines of y=x2+3 that pass through the point (0,−6). The tangent line of the parabola y=x^2+3 at the point (a,a^2+3) passes through the point (0,−6) ...
*June 17, 2013*

**Calculus**

Find the values of a ,b, and c in the quadratic function p(x)=ax^2+bx+c such that p(2)=6, p'2)=2, and p''(2)=3. a = b = c =
*June 17, 2013*

**Calculus**

Find the values of a , b , and c in the quadratic function p(x)=ax2+bx+c such that p(2)=6, p'(2)=2, p"(2)=3
*June 14, 2013*

**Calculus**

Find the values of a , b , and c in the quadratic function p(x)=ax^2+bx+c such that p(2)=6, pŒ(2)=2, and pŒŒ(2)=3.
*June 14, 2013*

**Calculus**

Find an equation for the tangent line of the function f(x)=6+10xe^x at the point (0,6).
*June 13, 2013*

**Calculus**

Find an equation for the tangent line of the function y=x+(4/x) at the point (2, 4). The equation of the tangent line is . You may enter the equation in any form.
*June 12, 2013*

**Calculus**

Let f(x)=−4−3x+2x^2. Use the limit definition of the derivative to find find fŒ(a)
*June 8, 2013*

**Calculus**

If a ball is thrown straight up into the air with an initial velocity of 95 ft/s, its height in feet after t seconds is given by f(t)=95t−16t^2 Find the average velocity for the time period beginning when t=1 and lasting (i) 0.5 seconds (ii) 0.1 seconds (iii) 0.01 ...
*May 31, 2013*

**Physics**

A roller coaster has a mass of 425 kg. It sits at the top of a hill with height 66 m. If it drops from this hill, how fast is it going when it reaches the bottom? (Assume there is no air resistance or friction.)
*May 14, 2013*

**chemistry**

The reaction of chlorine gas with solid phosphorus (P4) produces solid phosphorus pentachloride. When 63.5 g chlorine reacts with 28.5 g P4, which reactant is limiting?
*May 13, 2013*

**statistics**

if no preliminary sample is taken to estimate p, how large a sample is necessary to be 87% sure that the point estimate will be within a distance of 0.04 from p?
*April 24, 2013*

**PHYSICS**

A 2kg block is on a level table and held against a spring with k =150N/m which has been compressed 15 cm. he block is released from rest and pushed across the table. When the block leaves the spring it beins to experience fricion with coeficient of 0.25. What is the total ...
*April 17, 2013*

**PHYSICS**

yes would you be able to show me?
*April 14, 2013*

**maths literacy,business studies, tourism, economic**

What kind of work can i get one day with this subjects and what is the salary?
*March 13, 2013*

**math**

the original question was x^2-4x=32 can you help me solve?
*March 12, 2013*

**math**

x^2-4x+32=0. would the final answer be 2 +or- 2 sqrt7 ?
*March 12, 2013*

**math**

Thank you!
*March 12, 2013*

**math**

I am working on quadratic equations and I have worked a problem down to 3 plus or minus the square root of 361 all over 2... what next?
*March 12, 2013*

**Physics true false**

true false The speed of a particle is always positive. True False The average speed of a particle is equal to the magnitude of its average velocity. True False The acceleration of a particle can be non-zero when its speed is constant. True False When the average velocity of a ...
*February 26, 2013*

**Geography**

Hydrosphere basic facts and what makes up the hydrosphere?
*February 23, 2013*

**Chemistry**

two solutions are prepared using the same solute solution a: 0.27g of the solute disolves in 27.4g of t-butanol solution b: 0.23g of the solute disolves in 24.8g of cyclohexane which solution has the greatest freesing point change? show calculations and explain.
*February 18, 2013*

**Chemistry**

two solutions are prepared using the same solute solution a: 0.27g of the solute disolves in 27.4g of t-butanol solution b: 0.23g of the solute disolves in 24.8g of cyclohexane which solution has the greatest freesing point change? show calculations and explain.
*February 18, 2013*

**Math**

Rearrange this expression into quadratic form, ax2 bx c = 0 0.20= ((x^2)/(55-x)) where a = 1, and identify the values of b and c.
*February 18, 2013*

**grammar, contractions and negatives**

No one, or Someone who bought a car for transportation was not considered sane.
*February 7, 2013*

**math**

3 pumps, working 6 hours a day, can empy a water tank in 2 days. How many hours a day must 9 pumps work to empty the same tank in 1 day?
*January 26, 2013*

**Math**

A room is 45 m x 15 m. What is the least number of rectangle tiles required to pave the floor of the room, if each tile is 50 cm x 1m?
*January 26, 2013*

**Geology**

There is also a graph i can't move it. Building Isochrons and Determining the Ages of Three Rocks Page 15 of 17 For each of the three rocks listed below follow these steps to determine the rock's age of formation. 1. Prepare an isochron by plotting the points that ...
*January 12, 2013*

**phicicks**

A 0.300- kg brass block is attached to a spring of negligible mass. What is the value of the spring constant if the vibrational frequency is 0.855Hz?
*December 9, 2012*

**Chemistry**

You are asked to prepare a temperature bath that freezes at -25 degrees C, using only water and ammonium sulfate. a. How many grams of ammonium sulfate would you need to prepare this bath if you start with 500 grams of water? b. What would the boiling point (degrees C) of this...
*November 14, 2012*

**subject verb agreement**

which verb is correct. 1.Historical fiction (is, are) make-belive stories based on real events or people. 2. An example of historical fiction (is, are) the novel Ben and Me. 3. The main characters (is, are) Bem Franklin and a mouse named Amos.
*November 14, 2012*

**Math**

Andrea sells tickets at the Showtime Cinema. On Thursday night, Back to the Future was playing. Adults, senior citizens and children bought tickets at the following rates: Adults $5.00 Senior Citizens $1.00 Children $.10 Andrea sold 100 tickets worth $100. How many adult, ...
*November 7, 2012*

**grammar action and linking verbs(mental or physica**

In China, shrines honor ancestors. Is honor an a. action verb(physical)b. action verb(mental) c. linking verb d. not a verb
*October 30, 2012*

**English singluar and plural possessive nouns**

1. Slaves lives were terribly hard. 2. They wre at the mercy of owners whims. 3. A runawy life was in danger. 4. Often runaways traveled by the moon light. 5. It could take several weeks travel to reach the Norht. 6. Slaves hid directions in a song words. 7.Abolitionists role ...
*October 25, 2012*

**Enlgish, possessive form of singular and plural no**

possessive form of family, brother, suitcase, child, government, pen, train, tree, woman, refugg, families, brothers, suitcases, children, governments, pens, trains, trees, women,refugees
*October 25, 2012*

**english, possessive nouns**

Directions: Wrie each sentence. Change the underlined phrase to show possession. The honesty of children is refreshing. The honesty of children is the underline part of the phrase.
*October 23, 2012*

**English**

What is the difference between a complex, compound, and compound-complex sentence?
*October 3, 2012*

**physics**

Three forces act on a moving object. One force has a magnitude of 61.9 N and is directed due north. Another has a magnitude of 52.0 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object continues to move with ...
*September 23, 2012*

**algebra**

Tony went to the racetrack with $80. He won $15 on the 1st race, lost $12 on the 2nd, lost $6 on the 3rd and won $8 on the 4th. How much money did he have after the 4th race.
*August 28, 2012*

**American Governement**

Cite five reasons that Americans should trust the government?
*August 21, 2012*

**Intro to Social Work**

Your role is as a social worker for a group of low-income tenants of an apartment building who have no heat in their building. The landlord is attempting to raise the rent but the tenants cannot afford the increase. You have brought the parties together for a meeting. What are...
*August 18, 2012*

**psychology**

Identify intervention strategies to deal with burnout
*August 15, 2012*

**Algebra**

$3,000 balance, 21% rate, $1,500 payment, adjusted balance method
*August 5, 2012*

**Biology**

If the line for 60 captured is extended downward to zero percent error, what fraction of the total population would this represent? (Compare the actual number in the can to the extrapolated number on your graph.) What more information do I need to provide to get an answer?
*July 15, 2012*

**Biology**

A trip to a different stream which had 30 fish marked at an earlier time produced 20 captured fish but none were recaptured with fish tags. Can you estimate the number of fish in this stream? Explain your answer.
*July 15, 2012*

**Science**

Should humans strive to preserve a representative sample of all biomes or aquatic zones? Why should humans be concerned with the extinction rate?
*April 26, 2012*

**Trig**

Why does 11.4(7pi/18)=133pi/30 ?
*April 1, 2012*

**English**

Ms. Sue, thank you, I guess this additional information would have been helpful. Questions 1-4 the choices are, misplaced modifier, dangling modifier, faulty predication or incomplete comparison. Questions 5-10 re: the sentence shifts in, the choices are: person, tense, ...
*March 11, 2012*

**Important Operations**

18r4s5+6/-32s+3=? A)6r2s5+3 B)-6r2s5+3 C)6r2s4+3 D)-6r2s4+3
*March 9, 2012*

**Algebra **

Which must be a whole number? A. The time it takes to drive 300 miles at 55 mph B. The area of a circle with a radius of 5 feet C. The area of a triangle with base of 15 and height of 9 D. The number of books in 12 bookstores
*January 2, 2012*

**Algebra**

69% of the students at a school are involved in after-school activities. There are 598 students in the school. Which is the best estimate of the number of students in after school activities? A. 360 B. 380 C. 420 D. 450
*January 2, 2012*

**science**

When water is split into hydrogen and oxygen what happens- is it a change in matter
*November 30, 2011*

**math**

During a sale at the local department store, you buy three sweatshirts and two pairs of sweatpants for $85.50. Later you buy three more sweatshirts and four more pairs of sweatpants for $123.00 What is the sale price of each sweatshirt and each pair of sweatpants?
*November 13, 2011*

**English**

@SrajMCgin it's sometime hard to find idioms if english is your 3rd language's thats wy some people ask after searching the expressions for them because they can't find them !
*October 22, 2011*

**chemistry**

The vapor pressure of water @ 80 degrees C is 0.467 atm. Find value of Kc for the reaction H2O(l) to H2O(g) @ this temp.
*October 9, 2011*

**Calculus**

If f(x)=(3x)/(1+x2) find f′(4)______. Use this to find the equation of the tangent line to the curve y=(3x)/(1+x2) at the point (4,0.70588). The equation of this tangent line can be written in the form y=mx+b where m is: ________ and where b is:______
*September 29, 2011*

**Physics**

A hockey puck is sliding on frictionless ice. It slams against a wall and bounces back toward the player with the same speed that it had before hitting the wall. Does the velocity of the hockey puck change in this process?
*September 15, 2011*

**Physics**

Using Newton's law and the law of universal graviation: F=ma Acceleration is centripital acceleration, so a=(v^2)/r so G(m^2/r^2)=m(v^2/r)
*July 12, 2011*

**math**

chad's commission rate is 12%. He invests his commission from the sale of $9000 worth of merchandise at an interest rate of 8%, compounded quarterly. How much is Chad's investment worth after 6 months?
*July 11, 2011*

**math**

If a car is traveling at 55 mph in one direction, how long would it take to decelerate, turn around, and catch up with another car going at a steady speed of 100 mph in the opposite direction?
*July 6, 2011*

**Physics**

Hi, I am in the middle of a physics lab about sound resonance, but I have no idea what "n" stands for in the equation we have to use, which is L=(2n-1)(wavelength)/4 any help? thanks!
*June 27, 2011*

**science **

5.0millimeters
*June 16, 2011*

**HEALTH**

PLEASE HELP ME
*June 5, 2011*