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Questions Asked on January 2, 2011

When a driver applies brakes to keep a car going downhill at constant speed and constant kinetic energy, the potential energy of
1. 5 answers
2. asked by Sarah
3. 5,287 views
If f(x) = e^(sin x), how many zeros does f '(x) have on the closed interval [0, 2π]?
1. 2 answers
2. asked by Erica
3. 4,535 views
Triangle ABC, AB=8, BC=10, and AC=12, M is the midpoint of AB, and N is the midpoint of BC. What is the length of MN?
1. 3 answers
2. asked by Will
3. 3,428 views
A 0.100 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with
1. 1 answer
2. asked by John
3. 3,029 views
three point particles are fixed in place in an xy plane. Particle A has mass mA = 3 g, particle B has mass 2.00mA, and particle
1. 3 answers
2. asked by Anonymous
3. 2,875 views
If the derivative of f is given by f'(x)=ex-3x2, at which of the following values of x does f have a relative maximum value?
1. 1 answer
2. asked by lisa
3. 2,819 views
Cone Problem Beginning with a circular piece of paper with a 4- inch radius, as shown in (a), cut out a sector with an arc of
1. 1 answer
2. asked by Emma
3. 2,694 views
suppose you are drinking root beer from a conical cup. the cup has a diameter of 8 cm and a depth of 10 cm. as you suck the
1. 1 answer
2. asked by stephen
3. 2,644 views
If dy/dx = x²y², then d²y/dx² = ?
1. 1 answer
2. asked by Erica
3. 2,532 views
The graph of y = 3x^2 - x^3 has a relative maximum at what point?
1. 1 answer
2. asked by Erica
3. 2,018 views
what is the average rate of change for the function g(x)=3x^2-4 over the interval (-1,3)?
1. 3 answers
2. asked by help!
3. 1,985 views
The poor woman had some _______(happy) days.Hari is the _____ (idle) boy in the class. The ______ (long) lane has a twining.
1. 2 answers
2. asked by pratham
3. 1,973 views
Assume a planet is a uniform sphere of radius R that (somehow) has a narrow radial tunnel through its center. Also assume we can
1. 1 answer
2. asked by Kylie
3. 1,939 views
What activities increase the amount of carbon dioxide in the atmosphere? What activities decrease the amount of carbon dioxide
1. 2 answers
2. asked by peyton
3. 1,832 views
A lab technician has a 15 percent alcohol solution and a 35 percent alcohol solution. She wants to make 100 gallons of a 29
1. 2 answers
2. asked by Eric
3. 1,542 views
help me please.the perimeter of a rectangle is 120 inches. The length exceeds the width by 10 inches. Find the length and the
1. 3 answers
2. asked by cindy
3. 1,486 views
3. You obtain the following regression statistics for the relationship between defect rate and volume at one of your plants. You
1. 1 answer
2. asked by john
3. 1,350 views
If Quadrilateral QRST is a parallelogram, which is not necessarily true?a. Opposite angles are congruent. b. The diagonals
1. 3 answers
2. asked by whitney
3. 1,345 views
what is the slope of the line tangent to the curve y^3+x^2y^2-3x^3=9 at the point (1,2)?
1. 1 answer
2. asked by lena
3. 1,339 views
Carmen and hannah bought lunch at the pizza shop. Carmen ordered two slices of pizza an three cans of juice. Hannah ordered
1. 1 answer
2. asked by jill
3. 1,318 views
An aircraft P flying at a constant height has a velocity of (300+j400)km/h. Another aircraft Q at the same height has a velocity
1. 1 answer
2. asked by Ian Hart
3. 1,286 views
Four forces act on a hot-air balloon with F1 = 1660 N and F2 = 5040 N , shown from the side in Figure 4-29. Find the magnitude
1. 2 answers
2. asked by Anonymous
3. 1,282 views
a christmas tree is 34 feet tall. it casts a shadow 24 feet long. toms christmas tree is standing beside the tree at rockefeller
1. 1 answer
2. asked by david
3. 1,204 views
If g is a differentiable function such that g(x) is less than 0 for all real numbers x and if f'(x)=(x2-4)g(x), which of the
1. 1 answer
2. asked by jane
3. 1,189 views
Mark each of the following True or False.___ a. All vectors in an orthogonal basis have length 1. ___ b. A square matrix is
1. 0 answers
2. asked by Melissa
3. 1,170 views
If the integral of (x^2 - 2x + 2)dx from 0 to 6 is approximated by three inscribed rectangles of equal width on the x-axis, then
1. 1 answer
2. asked by Erica
3. 1,147 views
Four uniform spheres, with masses mA = 37 kg, mB = 30 kg, mC = 220 kg, and mD = 55 kg, have (x, y) coordinates of (0, 50 cm),
1. 6 answers
2. asked by Becky
3. 1,138 views
verify : [sec(x) / csc(x) - cot(x)] - [sec(x) / csc(x) + cot(x)] = 2csc(x)
1. 4 answers
2. asked by briana
3. 1,095 views
How do you solve ∫sin(3x+4)dx?I got the -cos(3x+4) part, but do you have to integrate the 3x+4 too? Does chain rule apply?
1. 1 answer
2. asked by Erica
3. 1,089 views
How much work is done by a boy weighing 450. Newtons while carrying a 20.0 kilogram package up a 2.00 meter flight of stairs?
1. 3 answers
2. asked by Vanessa
3. 1,069 views
show me how to find a slope?
1. 1 answer
2. asked by luz
3. 1,057 views
what is the slope of a line tangent to y=sin^2(5x+pi) at x=pi/4?
1. 4 answers
2. asked by lena
3. 1,053 views
Four forces act on a hot-air balloon with F1 = 1660 N and F2 = 5040 N , shown from the side in Figure 4-29. Find the magnitude
1. 2 answers
2. asked by Anonymous
3. 1,051 views
use either substitution or elimination to solve8x+15y=13 2x-5y=-1
1. 1 answer
2. asked by james
3. 1,043 views
pentane is burned completely in oxygen gas. what is the balanced equation?
1. 2 answers
2. asked by erin
3. 1,028 views
OK so can u guys help me compare/contrastA Tale of Two Cities to A Christmas Carol by Charles Dickens.. like compare
1. 2 answers
2. asked by SkaterGirl
3. 1,008 views
List and describe the steps involved when a gene in person's genotype is expressed to create a biochemical or physical
1. 3 answers
2. asked by KYLA
3. 989 views
five attribute of respect
1. 1 answer
2. asked by Anonymous
3. 985 views
Helium has the lowest boiling point of the elements. The slightest change in temp can cause it to vaporize and expand. To
1. 1 answer
2. asked by anonymous
3. 983 views
If t is measured in hours and f '(t) is measured in knots, then integral from 0 to 2 of f '(t)dt = ?(Note: 1 knot = 1 nautical
1. 0 answers
2. asked by Erica
3. 968 views
A child and sled with a combined mass of 40.0 kg slide down a frictionless hill. If the sled starts from rest and has a speed of
1. 1 answer
2. asked by Anonymous
3. 960 views
when items float freely inside a space capsule, is it an example of Newton's law #1 or #3? As soon as the astronauts take off
1. 1 answer
2. asked by anonymous
3. 945 views
The solubility of Ag2S is 2.48x10^-15 mol/dm3. Calculate its solubility product.
1. 1 answer
2. asked by Suha
3. 905 views
On a test whose distribution is approximately normal with a mean of 50 and a standard deviation of 10, the results for three
1. 1 answer
2. asked by Kathy
3. 895 views
what is the sample space for this experiment: select two cards from a deck of 52 cards and observe the color of each card drawn.
1. 1 answer
2. asked by Mark
3. 870 views
A baseball player hits a pitch when the ball is 2 feet off the ground. Two hundred feet from the plate, the ball reaches its
1. 3 answers
2. asked by Morgan
3. 866 views
The solubility product of PbCl2 at 25 degrees celcius is 1.6x10-5 mol3.dm-9. What is the solubility of PbCl2?
1. 1 answer
2. asked by Suha
3. 845 views
A car is moving along a straight horizontal road at 82 km/h and rain is falling vertically downwards at 25 km/h. Find the
1. 1 answer
2. asked by Ian Hart
3. 843 views
If the smaller leg of a 30-60-90 triangle is 4 m, what are the lengths of the longer leg and the hypotenuse?
1. 2 answers
2. asked by chris
3. 830 views
A piece of iron wire weighs 2.225g. It is dissolved in acid, which oxidizes the iron to iron(II), and made up to 250 mL. A 25mL
1. 0 answers
2. asked by Farah
3. 828 views
find four consecutive integers such that the sum of the squares of the first two is 11 less than the square of the fourth
1. 1 answer
2. asked by juliet
3. 821 views
What are 2 disadvantages of being an unskilled worker?
1. 0 answers
2. asked by Sarah
3. 801 views
A line through the origin rotates around the origin in such a way that the angle, θ, between the line and the positive x-axis
1. 0 answers
2. asked by Erica
3. 795 views
A ship is 400 miles directly north of the tahiti and is sailing south at 20mi/hr. another ship is 300 miles east of tahiti and
1. 1 answer
2. asked by stephen
3. 794 views
A kite 100 ft above the ground moves horizontally at a speed of 8 ft/s. At what rate is the angle of elevation between the
1. 1 answer
2. asked by Tom
3. 793 views
I posted this earler and you gave me help, could you please check what I did?Thank you If a car drives off a 40 m high cliff
1. 2 answers
2. asked by JessieLynne
3. 769 views
the mass of 4 moles of Co2 is ?(1)22g (2)44g (3)88g (4)176g please help !
1. 2 answers
2. asked by Jazmine
3. 764 views
A child and sled with a combined mass of 40.0 kg slide down a frictionless hill. If the sled starts from rest and has a speed of
1. 1 answer
2. asked by Anonymous
3. 758 views
what is incompatible reinforcement and how does it relate to the developmental-behavioral approach?
1. 1 answer
2. asked by need help
3. 750 views
If a car drives off a 40 m high cliff with a horizontal velocity of 15 m/s, how far from the base of the cliff will the car
1. 2 answers
2. asked by JessieLynne
3. 745 views
1. A 2,000 kilogram truck traveling at 60km/h strikes a tree and stops in 0.75 seconds. How large is the force that causes this
1. 2 answers
2. asked by Vanessa
3. 732 views
A commercial freight carrier is flying at a constant speed of 400mi/h and is traveling 4 mi east for every 3 mi north. A private
1. 0 answers
2. asked by Songthan
3. 719 views
Write a missing addend addition sentence to help solve 78-49.explain how you would use it.
1. 1 answer
2. asked by joel
3. 713 views
The vector a1=(1,1,0) and a2=(1,1,1) span plane in R^3. Find the projection matrix P onto the plane, and find nonzero vector b
1. 0 answers
2. asked by Melvin
3. 707 views
you've developed a file in which you keep pictures of differnt color birds. one day you give the group of pictures to a
1. 4 answers
2. asked by sarah
3. 698 views
A triangle has sides with lengths of 3x, 5x, and 8x. Express the perimeter of the triangle in terms of x. Please help!!!
1. 3 answers
2. asked by Gigi
3. 694 views
if the sides of a square are increased by 5 cm the area of the new square is four times the area of the original square. Find
1. 1 answer
2. asked by jill
3. 690 views
1. What is a Positive Change as being a successful student in college?How will you know if a student is SUCCESSFUL (doing
1. 2 answers
2. asked by yolanda
3. 686 views
what is a number where the square of itself is 195 more than twice the number
1. 2 answers
2. asked by jackie
3. 676 views
What are several factors that affect the productivity of a worker?
1. 0 answers
2. asked by Sarah
3. 667 views
what is withdrawing or withholding reinforcement and how does it relate to the developmental-behavioral approach?
1. 2 answers
2. asked by need help
3. 665 views
A dog pulls on a pillow with a force of 19 N at an angle of 42° above the horizontal. Find the x and y components of this
1. 3 answers
2. asked by Anonymous
3. 663 views
The vertices of ABC are A(-8, 0), B(0, 0), and C(0, -4). If a circle is circumscribed around ABC, where would the center
1. 1 answer
2. asked by asher
3. 648 views
The two diagonals of a rhombus are 16 inches and 12 inches long. What is the perimeter of the rhombus? Round to the nearest
1. 2 answers
2. asked by whitney
3. 645 views
I've solved every problem in my assignment except for two. I only need one more to get the grade I'd like/need. I've been doing
1. 0 answers
2. asked by Brandon
3. 642 views
A freight train has a mass of 6.5 107 kg. If the locomotive can exert a constant pull of 11.5 105 N, how long would it take to
1. 1 answer
2. asked by Anonymous
3. 637 views
OK so can u guys help me compare/contrastA Tale of Two Cities to A Christmas Carol by Charles Dickens.. like compare
1. 2 answers
2. asked by SkaterGirl
3. 634 views
find a number where the sum of itself and its cube is the same as twice the square if it
1. 1 answer
2. asked by juliet
3. 632 views
During a race, one runner runs at a 6 min/mi pace and another runner runs at a 7 min/mi pace. The fast runner passes the slow
1. 0 answers
2. asked by victoria
3. 631 views
A triangle has sides w/ lengths of 3x, 5x, and 8x. All of the sides add up to 180. Express the perimeter of the triangle in
1. 1 answer
2. asked by Gigi
3. 627 views
In a factory of electronic items, the total cost of production, expressed in thousands of dollars, is given by the function
1. 1 answer
2. asked by Jessy
3. 623 views
I am to identify all writing errors and correct them. Can you tell me if I did it right. The errors can be in the following
1. 1 answer
2. asked by angela
3. 622 views
What is the gravitational potential energy of a two-particle system with masses 5.4 kg and 5.0 kg, if they are separated by 1.3
1. 2 answers
2. asked by Jessica
3. 611 views
A box with a mass of 4.0kg is sitting on a plane angled at 60degrees above the horizontal. The coefficient of friction between
1. 2 answers
2. asked by Jared
3. 608 views
using the fundamental theorem of calculus what is the derivative of the definite integral from x^3 to sqrt x of (sqrt t) sin t
1. 2 answers
2. asked by adela
3. 607 views
Rona is driving a car, she travels a 40-90 km/hr and accelerates at 2m/s. How long will take for her to stop the car?
1. 1 answer
2. asked by DAnielle
3. 597 views
i understand optimization but im stuck on this problem.. mrs.day is building a new deck. she has 580 square feet to enclose. if
1. 1 answer
2. asked by tiana
3. 592 views
I've been doing this one over and over, consistently getting wrong answers. I know the process of how to do it generally, but I
1. 1 answer
2. asked by I need help, please
3. 591 views
I forgot to include these few more sentences.Thank you very much.1) I was given/granted 30% off (discount?) on the purchased
1. 1 answer
2. asked by Franco
3. 590 views
Can you please check these sentences for me?1)This afternoon my child went bobsleighing with his best friend. They had fun
1. 2 answers
2. asked by Franco
3. 588 views
The solubility product of Fe(OH)3 is 8.0x10^-40. Calculate its solubility at 35 degrees Celsius in a saturated solution.
1. 1 answer
2. asked by Suha
3. 588 views
can you just show me how to set this up? or a formula that could help? im confused.The length of a rectangle is increasing at 3
1. 2 answers
2. asked by bekah
3. 580 views
I would be very greatefull if anyone correct the following sentences, if they are not in right contexts.intermittent: 1. I don't
1. 1 answer
2. asked by Ramesh Reddy
3. 579 views
The perimeter of a rectagle is 50 centimeters. The length of the rectangle is one more than 3 times the width of the rectangle.
1. 1 answer
2. asked by Cody
3. 579 views
Cone Problem Beginning with a circular piece of paper with a 4- inch radius, as shown in (a), cut out a sector with an arc of
1. 0 answers
2. asked by Taylor
3. 578 views
in a rocket launching, the height h meter, the rocket reaches after t sec for the moment it was launched is given by h=xt-ytthe
1. 1 answer
2. asked by andhryn
3. 576 views
can someone please help me.The perimeter of a rectangle is 80m. The length is 7m more than twice and width. Find the dimensions.
1. 2 answers
2. asked by hawkins
3. 575 views
Joseph wanted to throw a ball to John who was on a balcony 32 feet above him,so he tossed it upward with an initial speed of
1. 0 answers
2. asked by Rosa
3. 573 views
What is the unscrambled word for nailsaiou it's a state
1. 1 answer
2. asked by Billy
3. 571 views
How does high unemployment lead to consumer confidence improving?I looked up Consumer confidence which is the degree of optimism
1. 0 answers
2. asked by Anonymous
3. 571 views

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