Questions Asked on
December 28, 2011

math
If the line 3x4y = 0 is tangent in the first quadrant to the curve y = x^3 + k, then k is
asked by S 
Geometry
The perimeter of triangle ABC is 29 meters. Line segment AD bisects angle A. Find AB and AC. CD=5cm, DB=4 cm.(triangle angle bisector theorem)
asked by Lily 
Physics
The Deorbit Burn The Shuttle must reduce its velocity at a precalculated point in its orbit in order to return to Earth. In order to reduce the velocity and change the orbit of the Shuttle, a maneuver called the deorbit burn is performed. For this
asked by Rory 
chemistry
b. Methanol, CH3OH, which can be used as a fuel, can be formed by the reaction between carbon monoxide and hydrogen as depicted in the following balanced equation. 2H2 + CO ¨ CH3OH Suppose 356 g of CO and 65 g of H2 are mixed and allowed to react. (i)
asked by jenny 
Please help me!!! BIOLOGY
1. Explain how natural selection and sexual selection can work together to cause the evolution of large antlers on male moose. 2. Suggest two ways a synthetic biologist can change the course of evolution.
asked by Mira 
calculus
The derivative of f(x) = x^4/3  x^5/5 attains its maximum value at x=
asked by Ann 
Math
Suppose that 20% of the residents in a certain state support an increase in the property tax. An opinion poll will randomly sample 400 state residents and will then compute the proportion in the sample that support a property tax increase. How likely is
asked by Rachna 
Math
The Prevu Theater keeps a set of five counterweights to help stagehands move heavy props. The weights can balance exactly any load that is a multiple of 10 kg, from 10 kg up to a total of the five weights. Give the masses of weights which meet these
asked by Denise 
English
Could you help me check these sentences, please? They refer to the same theme as yesterday's ones. (Can you say that?) 1) We met my son’s ski instructor at the baby ski lift (?) at two sharp. 2) Most ski slopes are very simple and therefore suitable
asked by Henry2 
Chemistry
What acid and what strong base would react in aqueous solution to produce the following salts in the formula equation? Write the balanced formula equation for each reaction. a) potassium perchlorate b) cesium nitrate c) calcium iodide I don't need just the
asked by Steven 
Penn Foster, Language and Other Barries
11.As a teacher in an ESL classroom,it's within your responsibilities to A.meet parents oneonone to discuss their child's progress B.provide language translation for the teacher when reequested C.determine when an ESL, student is ready to be mainstreamed
asked by annie 
chemistry
How many milliliters of a 3.00 M solution of hydrochloric acid are needed to completely react with 25.0 g of zinc sulfide according to the chemical reaction shown below? ZnS(s) + 2HCl(aq) ? ZnCl2(aq) + H2S(l) (Answer to three significant digits.) _____ mL
asked by joe walker 
Trigonometry
Solve the equations for value of x tan mx + cot nx = 0
asked by Kewal 
Physics
A 8.22 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 16.8 N. Find the speed of the block after it has moved 2.3 m. Answer in units of m/s
asked by April 
Scholastic Arts and Writing Awards
Fee Waiver Statment: A teacher or administrator must submit a letter on school letterhead listing the student or students who qualify for a fee waiver. The letter must be signed by the teacher or administrator and included with the submission form in lieu
asked by Lauren 
maths
A bag contained a number of 20cents, 50cents and $1 coins. 1/3 of the 20cents coins is equal to 2/3 of the 50cents coins. There are 3/5 as many 50cents coins as $1 coins. If the total value of these coins is $23.10, how many coins are there altogether ?
asked by joi 
CALC
Find the tangent line to the ellipse defined by 3x^2 + 5y^2 = 17 at the point (2, 1).
asked by TIFFANY 
Math,Ratio
Mrs Rama uses 0.4 liters of watermelon juice for every 0.9 liters of apple juice to make a jug of mixed fruit juice. a) for 225 ml of apple juice,how much watermelon juice should Mrs Rama use? b) if Mrs Rama uses 80 ml of watermelon juice,how much apple
asked by Da S 
Math
An apothecary has a set of five weights for use in the pans of his balance. By proper selection of weights, he is able to measure every multiple of 0.5 g, from 0.5 g up to a total of the five weights together. If the arrangement of weights is such that the
asked by Denise 
chemistry
(i) Give a brief explaination of the two bonding factors which determine the strength of an acid. (ii) Give a brief explanation of an Acid Buffer. (iii) Define an acid and base in terms of the BronstedLowry theory. Give two examples of conjugate acid/base
asked by cindy 
Penn Foster, Language and Other Barries
11.As a teacher aide in an ESL classroom,it's within your responsibility to
asked by annie 
maths
A rectangle is divided into 4 parts, A B, C and D. The areas of A: B: C are in the ratio 10:18:5. C is a square with an area of 25cm squared. What is the area of rectangle D?
asked by joi 
ENGLISH
I need to make sure I understand this. I need to rewrite each sentence twice, once as a periodic sentence and once as a cumulative sentence. To me, both look like cumulative sentences though, so I am a little confused. If someone could check my work I will
asked by Luis 
CALC
The radius in meters of a circular oil slick increases at a rate of (12  0.3t), where t is measured in hours. Which of the following expressions would calculate the rate at which the area of the oil slick is increasing when the radius is 100 meters?
asked by TIFFANY 
English
1. All flights have been cancelled because of bad weather. 2. All flights have been cancelled because of bad weather. 3. He cancelled the promise. 4. He canceled the promise. (Which one is correct? Which one is the correct form of the past tense of
asked by rfvv 
math
mario wants to put a rectanguar frame on a picture of a snowboarder.he has 18cm of string to make a the frame. Qdoes he have enough strings and what could be the dimensions.
asked by Micheal 
evolutionary machanism  BIOLOGY
A flock of migrating birds is blown off course by a storm and carried towards a small island that has no birds. Only three of the birds survive the storm and make it to the island. They start to reproduce and, after several years there are 500 birds on the
asked by Michelle 
social studies
i have to do a poster project of Thomas Jefferson and (i'm in the 8th grade) you get graded on how the colors correspond and how clear the pictures are and you have to have a caption under the picture saying what it is and a little bit about it and he will
asked by jordyn 
Trigonometry
Find all the angles between 0° and 90° which satisfy the equation sec²Θcosec²Θ + 2cosec²Θ = 8
asked by Kewal 
Math,Ratio
mr kim mixes cement&sand to make a mixture.he uses 2 pails of cement for every 5 pails of sand. a) if he uses 24 pails of cement,how many pails of sand does he use? b) if he uses 35 pails of sand,how many pails of cement does he use?
asked by Da S 
math
can u help this the qustion is : A circle passes through the points (1,4)&(5,0) and its centre lies on the line x+y3=0.Find (i) the equation of the circle and it parametric equations . (ii) the centre,diameter and area of the circle . (iii) the equation
asked by steev 
maths
The number of Samad's stamps is 30% of Derrick's stamps. The number of Derrick's stamps is 40% of Bee Hua's stamps. If they have 608 stamps, how many stamps does Derrick have?
asked by joi 
math
1) 3y+4 > 7y3 over 6 2) 3y over 2 + 5 over 3 < 7y+2 over 4 3) If A(1,2) B(2,6) and P(4,p) are collinear, find p. THANK YOU!
asked by Nicole 
calc
Find dy/dx given x^2+ y^2= 2xy. Im not sure how to find dy/dx
asked by ashley  HELP PLEASEE!!! 
HELP
how is macaroni and cheese prepared?
asked by Madlekia 
Biology  Evolution
In one sentence each, describe a) one positive effect of direct artificial selection b) one negative effect of direct artificial selection c) one negative effect of indirect artificial selection
asked by Sara 
physics
If the mass is 4.3 kg, the initial speed is 4.0 m/s, and the initial height is 8.4 m, find the speed of the ball when it is at a height of 8.0 m. Please and Thank You for the help.
asked by Liz 
Fitness
describe the path that oxygen follows through the human body to reach muscle tissue and describe the path carbon dioxide follows from inside the cell to the outside envrionment
asked by Heather 
phycis
A roller coaster has two hills and starts from rest atop the first hill , which is the higher of the two hills . The secound hill increases if the height of the initial hill is increased by 20m
asked by martin 
Social St.
Is it right how the Supreme Court Justices are appointed? And why you agree or disagree? (I need others opinion) I think I would disagree because even though the President is known as the boss, it does't mean that it doesn't have the citizens right to vote
asked by M. 
Zeppieri
What are you taught during your first year of playing the piano?
asked by Rebecca 
Math
amount of $680.00 to be divided into 3 people in order of 1st, second and 3rd
asked by Melania 
maths
1/5 of Jane's money is equal to 1/3 of Sam's money. The difference in their amount is 1/2 of Adam's money. If Adam gives $120 to Sam, Sam will have the same amount of money as Jane. How much do the 3 people have altogether?(nonalgebra solution pls)
asked by joi 
math
I want to know why [55cos(square)(filter)] is equal to [5sin(square)(filter)] Do you guys know what I mean? sorry for that I can't type (square and filter) signs
asked by Nicole 
intermediate algebra
0.3x + 0.2y=5, 0.5x + 0.4y=11 using the substitution method
asked by cecelia 
English
I left out these sentences. Could you please have a look at them, too? 1) This morning we got up really late. It was almost nine o’clock and our ski lesson was at ten. 2) We had less than half an hour to get washed and dressed and go downstairs for
asked by Henry2 
Fitness
what 3 anatomical factors influence a persons vo2max and what 3 internal physiological factors influence a persons vo2max
asked by Heather 
PreCal
Find the area of each circular segment to the nearest tenth, given its central angle, x, and the radius of the circle. x= pi/8, r=7
asked by Jessica 
cultural diversity
i have 3 questions that i am stuck on and i really need to see if this site can help me with this ones.this my first time on here. 1.a young asian child would probably be less inclined to engage in backchanneling than a middleclass american child does
asked by denise 
English
Slot Boundaries. I am new to this and Im not sure what I am supppose to do. I have to seprate the word document sentences and draw verticle lines to identify the slot boundries. Then I am required to label each slot with the form and function. After
asked by Amy 
chemistry
Find the amount of solute deposit when 200 cm 3 of the solution is cooled from 55oc to40oc.
asked by Stephen 
math
Reducing to the Least Common Denominator: x + 1/m m.
asked by Sebastian 
calc
If f (3) = 9 and f ´(3) = 4, find the tangent line to the graph of f when x = 3.
asked by TIFFANY 
chimie
formule de lewis du c2h7no
asked by lolo 
Social studies
What is an example of checks and balances
asked by David 
Math
Please explain how to solve this equation with substitution: The owner of a hair salon charges $20 more per haircut than the assistant. Yesterday the assistant gave 12 haircuts. The owner gave 6 haircuts. The total earnings from haircuts were $750. How
asked by Jane 
math
Please show me how to solve using elimination: It takes a florist 3 h 15 min to make 3 small centerpieces and 3 large centerpieces. It takes 5 h 20 min to make 4 small center pieces and 7 large centerpieces. How long does it take to make each small
asked by Jane 
world religions
I am pretty confused with this queston any help would be great!! If Jesus were human what does that mean for Christianity and Judaism
asked by Heather 
honors physics
What is the minimum velocity for a tolerant coaster traveling on the ground to make it over 112 m hill
asked by salli 
calc
The top half of a storage tank is a circular cylinder that is 5 meters tall and has a diameter 2 meters. The bottom half of the tank is shaped like an 8meter inverted cone (pointed down). Let h represent the depth of the tank's contents. At t = 0 minutes,
asked by Eliza 
alegebra II
N= 2x^2+76x+430
asked by Daniella 
steev
can u help this the qustion is : A circle passes through the points (1,4)&(5,0) and its centre lies on the line x+y3=0.Find (i) the equation of the circle and it parametric equations . (ii) the centre,diameter and area of the circle . (iii) the equation
asked by math 
physical
What is the electrons velocity that made its momentum equal to the momentum of photon whose wave length 5200A?
asked by dany 
Math
What is the VOLUME of the solid with the given measurements? Trianglular prism: base 2cm by 3cm height 8cm
asked by Blake 
WRONG
Will not let me Submit Question
asked by Calvin 
Government
With regard to lower courts,the Supreme court's most important function is:
asked by Calvin 
Government
Senatorial courtesy refers to the tradition whereby:
asked by Calvin 
criminal justice major
I was expelled from college for having a argument with one of my teammates and went in her room with a bb gun in my pocket but never pulled it out on her the bb gun was for a soccer player and i gave it right back i to him. i was arrested the next day and
asked by terriyine 
Calc
Suppose 4y + xy = 2. Evaluate d^2x/d2^y at the point (3, 2).
asked by Randy 
physics
What is the initial height big an object if, when dropped from rest , its kinetic energy is 21J 2/3 of the way towards the ground? The mass is 5
asked by holly 
calc
Suppose the function a) Use the definition of the derivative to show that f ' (2) = 1. b) Write an equation for the line tangent to the graph of f at x = 2.
asked by Eliza 
calc
Suppose the function f(x)=4/x a) Use the definition of the derivative to show that f ' (2) = 1. b) Write an equation for the line tangent to the graph of f at x = 2.
asked by Eliza 
calculus
1] Reducing the Denominator: x + 1/m m. 2] Factor the numerator.
asked by Sebastian 
Government
Precedent,while not an absolute contraint on the courts,is needed to: A.maintain legal consistency over time,so the confusion and uncertainty about the law can be avoided. B.preserve the courts as a majoritarian. C.check the president in the area of public
asked by Calvin 
history
Which of the following statements is true regarding the Korean War?
asked by Anonymous 
Penn Foster, Language and Other Barries
6. to say that all African American males are fast runners is an example of A.prejudice B.sexism C.sterotype D.bias
asked by annie