Wednesday
October 22, 2014

Posts by Jennifer


Total # Posts: 2,017

Calculus
x=0, 2, -2
February 14, 2014

Math
I think its as a function of time
February 14, 2014

Math
A bicyclist is competing in a tournament. He is currently in a very hilly part of the tournament's course. For his current hill, his height in metres over time in minutes is modelled by the function; f(x)=-0.00075x^2-0.5825x+17.269 a) Estimate the bicyclists instantaneous ...
February 14, 2014

Math
State two points on the graph of y=sinx that will give an average rate of change of 0?
February 14, 2014

Math
Got it! thanks for the correction.
February 14, 2014

Math
Awesome Thanks!!
February 14, 2014

Math
Determine the value of 'a' so that the average rate of change of the function h(x)=x^2+3x+2 on the interval -3<=x<=a is -1
February 14, 2014

Math
A batter hits a baseball straight up into the air. The height of the ball in metres above the ground is given by h(t)=-4.9t^2+23t+2, where t is the number of seconds after the ball is hit. a) What is the average rate of change in the height of the ball over the interval 1.5<...
February 14, 2014

physics 2 for college
What’s the potential energy of a ball attached to a spring that is stretched 0.2m from its original unstretched position. (Spring constant k=200 N/m)
February 9, 2014

chemistry
The molar mass of HCl is 36.5g use the fact that 1 amu = 1.6605x 10-24g power g to calculate Avogradro’s number.
January 31, 2014

geometry
solve for -4x=3y=3 7x-9y-6
January 26, 2014

Physic II
A proton is located at x = 1.0 nm, y=0.0nm. and an electron is located at x=0.0nm y=3.0nm. Find the attractive Coulombic force between them. (The value of k is 9.0 * 10^9 N*m^2/C^2) I found 2.3 x 10^-11 N am I correct?
January 26, 2014

Fractions
lisa's dog has 4 squeaky toys. two thirds of the dog's toys are squeaky toys. how many dog toys does lisa's dog have in all?
January 24, 2014

MATH Fractions
so if i have 4 sandwiches i have to add 1 whole of each sandwich? sorry 3rd grade is crazy and they don't explain it that well
January 24, 2014

Business
Will there ever be a single set of international rules governing multinational companies? Why? Why not? In what way are United States businesses demanding socially responsible behavior from their international suppliers? Why is this important to discuss? (graded)
January 21, 2014

Business
Will there ever be a single set of international rules governing multinational companies? Why? Why not? In what way are United States businesses demanding socially responsible behavior from their international suppliers? Why is this important to discuss? (graded)
January 21, 2014

Business
What do you presume had happened to get the U.S. corporations and workers to take their eyes off of their own economic interest? It seems the "carrot" of cheaper prices were dangled in front of them, but they didn't perceive the "sucker punch" of ...
January 14, 2014

math
you would use 1/3 cups of sugar and 1 1/4 cups of flour to half the recipe.
January 13, 2014

math
Fractions and mixed numbers are often used in everyday life. Discuss a real-life example in which you would need to add, subtract, multiply, or divide fractions or mixed numbers, and show the math
January 13, 2014

Science
Lines of latitude and longitude on a globe or map____________. a. estimate b. move c. intersect d. adjust
January 12, 2014

math
alaine has a ribbon that is 14 and one half feet long how long will each strip be if she cuts it into four equal parts
December 16, 2013

math
in a store all the oranges are stacked in triangular pyramids, each layer of oranges is in the shape of an equilateral triangle and the top layer is an single orange. How many oranges are are in a stack ten layers high
December 8, 2013

Physics Classical Mechanics
thnks, yeah i got it wrong too. i think that by top view means that its a disk and you are looking at it from the top. so you just have to do the torque torque= F*d=I*alpha so alpha = F*d/I d= distance between the point of aplication of the force and the point of rotation
December 7, 2013

Physics Classical Mechanics
mets, can you help me with the aceleration please???
December 7, 2013

physics Classical Mechanics
yes i got it wrong too
December 7, 2013

physic
a) t=d/v = 0.5588 seconds N=f*t = 650*0.5588= 363.235 b) i dont know it c) f'= f* (1-(speed observer/speed sound))
December 6, 2013

Spanish 2 Questions
1- te 2- te 3-, me 4- me 5- nos
November 30, 2013

math
You are the buyer for The Shoe Outlet. You are looking for a line of men’s shoes to retail for $79.95. If your objective is a 55% markup based on selling price, what is the most that you can pay for the shoes and still get the desired markup?
November 26, 2013

Physics
An X-ray binary consists of 2 stars with masses m1 (the accreting compact object) and m2 (the donor). The orbits are circular with radii r1 and r2 centered on the center of mass. (a) Find the orbital period T of the binary following the guidelines given in lectures. Express ...
November 24, 2013

math
Ned's Sheds purchases building materials from Timber town Lumber for $3,700 with terms of 4/15, n/30. The invoice is dated October 17. Ned's decides to send in a $2,000 partial payment. By what date must the partial payment be sent to take advantage of the cash ...
November 19, 2013

math
The Empire Carpet Company orders merchandise for $17,700, including $550 in shipping charges, From Mohawk Carpet Mills on May 4. Carpets valued at 1,390 will be returned because they are damaged. The terms of sale are 2/10, n30 ROG. The shipment arrives on May 26 and Empire ...
November 19, 2013

Math
A spider and a fly are in a room that has length 8 m, width 4 m, and height 4 m. The spider is on one end wall 1 cm from the floor midway from the two side walls. The fly is caught in the spider’s web on the other end wall 1 cm from the ceiling and also ...
November 17, 2013

Math
4. A spider and a fly are in a room that has length 8 m, width 4 m, and height 4 m. The spider is on one end wall 1 cm from the floor midway from the two side walls. The fly is caught in the spider’s web on the other end wall 1 cm from the ceiling and ...
November 17, 2013

Physics question - Damon please help!!
Thank you so much for taking the time to help me
November 11, 2013

Physics question - Damon please help!!
I am doing the monkey and hunter question, and I need to find out what the minimum speed the bullet has to be.. The variables I have are g, Vo, theta, Dx(horizontal distance from monkey), and Dy (vertical distance from monkey). I need to derive Vo in the form of (Dx/cos0)(sqrt...
November 11, 2013

Algebra
A plane has a speed of p km/h in still air. It makes around trip flying with and against the wind of w km/h.Show that its average speed is p^2-w^2/p km/h
November 5, 2013

Algebra
A plane has a speed of p km/h in still air. It makes around trip flying with and against the wind of w km/h.Show that its average speed is p^2-w^2/p km/h
November 5, 2013

Math
Jasmine has taken an online boating safety course and is now completing her end of course exam. As she answers each question.,the progrss bar at the bottom She has just completed question 16 and the test bar how she is 20% of questions. How many total questions of the teat?use...
October 29, 2013

Finance
If upon retirement in 20 years Simon plans to invest $400,000 in a fund that earns 5%, what is the maximum annual withdrawal he can make over the following 15 years
October 25, 2013

(Dead Poets Society)
Did Neil Perry make any accomplishments in the movie? Also what did Todd Anderson sacrifice to reach his goal of pleasing his teachers? Please help!
October 24, 2013

Math- Algebra
A motorist was to travel from town A to town B, a distance of 80 miles. He traveled the first 24 minutes at a certain rate; traffic then increased and for the next 6 minutes he averaged 10 miles per hour less than his original speed; then traffic eased up and he traveled the ...
October 20, 2013

Physics
You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. The soccer ball is kicked at 41° from the edge of the building with an initial velocity of 21 m/s and lands 59 meters away from the wall. How tall is the ...
October 10, 2013

statistics
The typical amount of sleep per night for undergraduate college students has a bell shaped distribution with a mean of 7 and a standard deviation of 1.90 hours. Based on this distributional information we can conclude that at least 95 % of this population sleep ...
September 27, 2013

Math
There are two main classes of individuals who can affect the outcome of an experiment: Those who could influence the results Those who evaluate the results When all the individuals in either one of these classes are blinded, an experiment is said to be: A) Single blind (I'...
August 29, 2013

Complements
I think I have the complements right (see what's in brackets), but I need to say whether they're predicate adjective, predicate nominative, direct or indirect objects. At first this Saturday had been a warm, sunny [day]. However, the sky became [greyer] and [greyer] as...
August 24, 2013

Mumford HS
graph on calculator and estimate local maxima and local minima g(x)=1/2x^3-4x+3
July 13, 2013

Math
A soccer ball is kicked from the ground. After travelling a horizontal distance of 25m, it just passes over a 2m tall fence before hitting the ground at a horizontal distance of 35m. a) Determine an equation to represent the height of the ball relative to its horizontal ...
July 10, 2013

College Algebra
Suppose that the Quadratic equation had two X-intercepts. How could you use the intercepts to find the vertex?
June 5, 2013

College Algebra
When using the Quadratic formula, why is only necessary to examine the discrimant to determine if the equation only has real numbers?
June 5, 2013

tech III math ( ACT Prep)
A neon sign flashes every 4 seconds, another neon sign flashes every 6 seconds. If they flash together,how manyseconds later will they flash together again?
June 3, 2013

Physics
How much work does it take to stretch the spring from 10 cm to 20 cm from equilibrium?
May 30, 2013

Chemistry
calculate the volume of the 3.0 M stock solution needed to make a diluted 30mM solution in 400ml
May 29, 2013

Chemistry
calculate the volume of the 3.0 M stock solution needed to make a diluted 30mM solution in 400ml
May 29, 2013

pre calc
Find the exact value of sin(x-y) if sinx=-3/5 in Quadrant III and cosy=5/13 in Quadrant I.
May 21, 2013

Calculus
Using the four-step process find f(x)= 13 I know it is 0 and how to do the 4-step process, I just don't know how to do it without an exponent. Help please!
May 15, 2013

Calculus
An OPEN box has a square base and a volume of 108 cubic inches and is constructed from a tin sheet. Find the dimensions of the box, assuming a minimum amount of material is used in it's construction. HINT: the goal is to minimize the surface are of the OPEN box; this is ...
May 14, 2013

economics
65000
May 2, 2013

roslyn
Margo's soccer coach brought a large bag of watermelons to practice. The mass of the bag with all the watermelons in it was 12 kilograms. Explain how you could use estimation to figure out how many watermelons are in the bag.
April 24, 2013

algebra
Abby Tanenbaum paddled her canoe 10 miles upstream, adn then paddled back to her starting point. If the rate of the current was 3 mph,and the entire trip took 3.5 hours, what was Abby's rate (in still water)?
April 23, 2013

math
Say the price of a gallon of milk was raised from $3.00 to $3.50. What was the percent increase? Round to the nearest whole percent.
April 8, 2013

chemistry
what is the mass of sodium nitrate (85.00g/mol) that releases 2.55L of gas at STP?
April 5, 2013

Chemistry
Okay, I calculated that it should be Fe^2+ that precipitates out first and the concentration of CO3^2- is 9.55x10^-10. is that correct? in regards to question b: where is K2CO3 coming from? how am I using that in the calculation?
April 1, 2013

Chemistry
I am so overwhelmed. can somebody please help me? Consider a solution that is 0.022 M in Fe^2+ and 0.014 in Mg^2+ A) if K2CO3 is to selectively precipitate one of the cations while leaving the other cation in solution, which cation will precipitate first? B) What minimum ...
April 1, 2013

math
howard has 3 m of ribbon. how many centimeters is that
March 30, 2013

math
two third of a blueberry pie is left in the refrigerator. If the leftover pie is cut in 6 equal size, which fraction of the original pie is each slice
March 20, 2013

Life orientation
Ways in which the human or enviromental problem impacts have on the community
March 18, 2013

math
i actually need the anwser my self
March 15, 2013

Algebra
you trim a large square picture so that you could fit it into a frame. you trim 3 inches from the length and 2 inches from the width. the area of the resulting picture is 56sq in what was the perimeter of the original large square picture?
March 12, 2013

Chemistry
What is the mass of gas dissolved in a solution at 150kPa if 0.35g of the gas dissolves in 2.0L of water at 30kPa?
March 3, 2013

math
rectangular prism with a volume of 72 cubic inches; sum of the 3 lengths is 13; width is half of the height; the length is one more than the width what are the dimensions of the rectangular prism
February 27, 2013

Finance
After visiting several automobile dealerships, Richard selects the car he wants. He likes its $18,500 price, but financing through the dealer is no bargain. He has $3,700 cash for a down payment, so he needs an $14,800 loan. In shopping at several banks for an installment loan...
February 15, 2013

Finance
Joshua borrowed $2,300 for one year and paid $138 in interest. The bank charged him an $15 service charge. If Joshua paid the $2,300 in 12 equal monthly payments, what is the APR? (Round your answer to 1 decimal place
February 15, 2013

Chemistry (Stoichiometry)
Heres a balanced equation: Na2CO3(aq)+2AgNO3 (aq) --> 2NaNO3(aq)+Ag2CO3 (s) From this equation, 10 mL of AgNO3 in this contains 34 grams of AgNO3. Calculate the grams of solid product, Ag2CO3. Part 2: 10 mL of Na2CO3 in this experiment contains 21 grams of Na2CO3. ...
February 6, 2013

Logarithms
help- e^1-5x=3 find solution to 4 decimal places. I don't know how to type it in to my calculator!
February 5, 2013

vocabulary
It won’t take long to clean, but you can’t do it. Your clothes are on the floor, and games are everywhere.
February 5, 2013

math
12
February 4, 2013

physics
use x = x0 + v0*t + 1/2*a*t^2 v = v0 + a*t where x is position, x0 is initial position, v0 is initial speed, a is acceleration/deceleration, t is time, and v is speed as a function of time a) 56 - 6.2*t^2 = 0 Solve for t, the time it takes for the speed to go to zero. The ...
February 4, 2013

algebra
aletha earns $6.40 per hour
January 31, 2013

physics
After one second, when the patrol car is at location x = 0, the student is at 45 m. The student's location as a function of time, where t=0 when the police car starts accelerating is 45 + 45*t The policeman's position is 1/2*3*t^2 Set these two equations equal to each ...
January 30, 2013

Physics
Force = mass*acceleration Since the book is at rest in your hands and not moving, the net force is 0.
January 30, 2013

physics
First, find the x and y components of all vectors: Ax = -6.2*cos(52) Ay = 6.2*sin(52) Bx = 6.6*cos(27) By = 6.6*sin(27) Cx = 2.8*cos(57) Cy = -2.8*sin(57) Dx = Ax - Bx + 3*Cx Dy = Ay - By + 3*Cy D has a magnitude of D = (Dx^2 + Dy^2)^0.5 and a direction of theta given by tan(...
January 30, 2013

Physics
v(air) = lambda*fair where lambda is the wavelength, fair is the frequency in air v(helium) = lambda*fhelium v(air)/v(helium) = f(air)/f(helium) Look up the speed of sound in air and solve for f(helium)
January 30, 2013

Physics
the fourth standing wave frequency is 4*f1, where f1 is the fundamental wave frequency. The seventy fundamental frequency is 7*f1 7*f1 - 4*f1 = 3*f1 = 144 hz f1 = 144/3
January 30, 2013

Physics
(2.5 cm)sin[(3.0 m-1)x - (27 s-1 )t] + (2.5 cm)sin[(3.0 m-1)x + (27 s-1)t] = (5cm)sin[(3.0m-1)x - (27 s-1)t]
January 30, 2013

Math
A) 12 choose 3, calculated as 12! / (3! * 9!) = 12*11*10 / (3*2)
January 30, 2013

Physics
Energy = Power*time Power = I^2*r = I*V = 1.5*1.2 5 * 10^3 = 1.5*1.2*time solve for time. Your answer will be in the SI units of seconds; divide this answer by 60 sec/min to convert the answer to minutes
January 29, 2013

computer science
You're going to have to look up the functions in the particular language you're working with to learn how to store arrays, select elements of the array, and print statements.
January 29, 2013

Chemistry
Calcium propanoate or calcium propionate has the formula Ca(C2H5COO)2 . . . try using your textbook to look up the chemical formulas for the other reactants involved in these equations. . . such as hydrogen chloride and anhydrous ethanoic acid. Then research how these ...
January 29, 2013

maths
I imagine you're supposed to solve for the missing variables. I'll do a couple so you get the idea. 1) 2a - a/5 = 2/3 adding like terms: 1.8 a = 2/3 9/5 a = 2/3 a = 10/27 2) 3(a+4)+1 = a/2 3*a + 12 + 1 = a/2 3*a + 13 = a/2 13 = -2.5a a = 13/-2.5 . . .
January 29, 2013

Algebra 1- Math
2x - y = -4 -3x + y = -9 From the first equation: y = 2x + 4 Substitute this into the second equation: -3x + 2x + 4 = -9 -x + 4 = -9 -x = -13 x = 13 Then plug this answer back into the first equation 2*13 - y = -4 26 - y = -4 -y = -30 y = 30
January 29, 2013

Chemistry
You need to calculate the equilibrium constant K, which for C would be ([H2BO3-]*[CO3 2-]) / ([HCO3-]*[HBO3 2-]) Look up the equilibrium concentrations [] of the various compounds, and solve. If K > 1, products are favored. If K is less than 1, than reactants are favored
January 29, 2013

help
First, plot the parallelogram on graphing paper. Next, calculate the length of each side using the formula for the distance between 2 points (x1, y1), (x2, y2): ((x1-x2)^2 + (y1-y2)^2)^0.5 Then calculate the slope of each line passing through these two points: slope = (y2-y1...
January 29, 2013

geometry
why don't you try getting out your compass, following each of the student's steps, and see which one yields a parallelogram PQRS?
January 29, 2013

Math
Let P be the principal invested. The amount at the end of four years will be for each scenario 1: P*(1+0.0225/2)^(4*2) 2: P*(1+0.0225/4)^(4*4) 3: P*(1.0195^4)
January 29, 2013

statistics
I. 71. The mode, by definition is the answer that appears most frequently. II. The midrange is 64, which is by definition the arithmetic mean of the largest and the smallest values in a sample or other group. The range is 55. Let H = highest score, and L = lowest score. Then...
January 27, 2013

probability
suppose that the times taken to complete an online test are normally distributed with a mean of 45 minutes and a standard deviation of 12 minutes. find the probability a. that for a randomly selected test, the time taken was more than 1 hour. b. that the mean number of minutes...
January 21, 2013

science
250 mL
January 20, 2013

Physics
The length of the telescope is 0.2 + 1.6
January 20, 2013

concepts to population health
They should use this data to identify where resources should be most efficiently concentrated/directed in order to best affect the health outcomes of the population as a whole.
January 20, 2013

Physics
y = y0 + vy0*t -1/2*g*t^2 x = x0 + vx0*t where y is the y position as a function of time, y0 is the initial y position, vy0 is the initial y velocity, g is the acceleration due to gravity (9.8 m/s^2), t is time, x is the x position as a function of time, vx0 is the initial x ...
January 20, 2013

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