Thursday
August 28, 2014

Posts by LILY


Total # Posts: 1,111

physics
A uniformly charged insulating rod of length 19.0 cm is bent into the shape of a semicircle. The rod has a total charge of −8.50 ìC. Find the electric potential at O, the centre of the semicircle.
August 28, 2013

chem
1. Suppose that a recipe calls for an oven temperature of 189°F. Convert this temperature to degrees Celsius and to kelvins. --I found that Celsius is 87.2, plug it in K=C+273, got 360.2 but it was wrong. (e) Neon, the gaseous element used to make electronic signs, has a ...
August 11, 2013

FINANCE
you want to retire in 30 years. You intend to invest $200 per month into a mutual fund that you expect to return 12% per year (1% monthly). If you continue making these monthly investments for 30 years, what amount of money will you have at the end of the 30th
June 25, 2013

More math linear equation help?
I'm looking at this graph where I see a line AB with the points (-2,2) and (2,8). Then I have to do the following: a) Find the length of AB b) Find the midpoint of AB c) Write an equation for the line going through AB I don't understand how to do part a and c, so could...
May 31, 2013

Math Linear function help?
How do you write an equation of a line in slope intercept form if two points are given? Ex. Say you were given the points (0,6) and (4,3)? What would you do?
May 31, 2013

Calculus
A rancher wants to build a rectangular pen with an area of 150 m2. Let W be the width of the pen and L be the length of the pen. a. Find an equation for the perimeter P in terms of W and L . b. Use the given area to write an equation that relates W and L . c. Find the pen ...
May 26, 2013

Algebra 2
Thank you
May 18, 2013

Algebra 2
State the possible number of imaginary zeros of f(x)= 2x^3 - 4x^2 + 8x - 3. 0,1,3?
May 18, 2013

Algebra 2
It feels like too many problems have no solutions! Very frustrating for me. Thank you for checking it!
May 18, 2013

Algebra 2
Solve the system: y^2 - 4x^2 = 4 and y = 2x. (-1,-2)?
May 18, 2013

Algebra 2
Thank you!
May 18, 2013

Algebra 2
Find the exact solutions of x^2 - (y - 12)^2 = 144 and y = -x^2. No solution?
May 18, 2013

Algebra 2
Sorry, I'm very rusty on this concept. Thank you for the explanation.
May 18, 2013

Algebra 2
Write the expression 13m^8 - 3m^4 + 4 in quadratic form if possible. m^8?
May 18, 2013

Algebra 2
Thank you
May 17, 2013

Algebra 2
Solve the system, 4x^2 + y^2 = 20 and y = 4x. (square root of 10/2, 2 square root of 10)?
May 17, 2013

Algebra 2
At this point, I'm fooling myself!:-)
May 17, 2013

Algebra 2
Thanks
May 17, 2013

Algebra 2
Find the exact solutions of x^2 - (y - 6)^2 = 36 and y = -x^2. (0,0), (6,6), and (-6,6)?
May 17, 2013

Algebra 2
Thank you, again!
May 16, 2013

Algebra 2
The graph (x - 2)^2 + 3(y - 2)^2 = 25 is the graph of a(n) ________. Ellipse?
May 16, 2013

Algebra 2
Thank you
May 16, 2013

Algebra 2
The graph of x^2 + y^2 = 6x + 81 is the graph of a(n) _______. Circle?
May 16, 2013

Algebra 2
Thank you
May 16, 2013

Algebra 2
The graph of x^2 - 12y = 12x - 12 is the graph of a(n) ________. Parabola?
May 16, 2013

biology
For each of these restriction enzymes, determine whether or not the enzyme would cut the normal, Mutant A, Mutant B, or Mutant C DNA sequences described in part (g) and select your answers in the table below:
May 15, 2013

Algebra 2
Thank you!
May 15, 2013

Algebra 2
The graph of 11x - x^2 - 4y^2 = 2y - 16 is the graph of a(n) ________. a. circle b. ellipse c. hyperbola d. parabola C?
May 15, 2013

Algebra 2
Thanks!
May 15, 2013

Algebra 2
The graph of 5x - 9y^2 = 12 - 4y is the graph of a(n)______. a. circle b. ellipse c. hyperbola d. parabola C?
May 15, 2013

Probability Math
A committee of four students will be selected from a list that contains six Grade 9 students and eight Grade 10 students. What is the expected number of Grade 10 students on the committee?
May 7, 2013

Math
At the Statsville County Fair, the probability of winning a prize in the basketball toss game is 0.1. a) Show the probability distribution for the number of prizes won in 8 games (round to 6 decimal places). b) If the game will be played 500 times during the fair, how many ...
May 7, 2013

Algebra 2
Thank you!
May 6, 2013

Algebra 2
Find the expansion of (r + 4)^3. r^3 + (3r^2)(4) + 3r16 + 64?
May 6, 2013

Physics
To measure how far below the ocean surface a bird dives to catch a fish, a scientist uses a method originated by Lord Kelvin. He dusts the interiors of plastic tubes with powdered sugar and then seals one end of each tube. He captures the bird at nighttime in its nest and ...
May 5, 2013

social studies
what is one power given to the state governments in the Constitution
April 16, 2013

Math
So it's rhombus
April 16, 2013

Math
Select the geometric figure that possesses all of the characteristics: (1) four equal sides (2) both pairs of opposite sides are parallel (3) it doesn't contain any right angle A) square B) parallelogram C) rhombus D) isosceles triangle I know it's not A or D
April 16, 2013

Chemistry
If there are 2L of H2 gas at .625 atm, and 1L of N2 gas at .200 atm isolated in two flasks, what are the final partial pressures of each, and the total pressure, after the valve between the two flasks has been opened and the gases are allowed to mix? Is this simply a ratio ...
April 7, 2013

Busines Ethics
Imagine you are a salesperson.When does offering a gift,Such as basketball tickets,become a bribe rather than just a sales practis ?
April 4, 2013

math
If line 1 passes through (2, -6) and (-2, -2) and line 2 passes through (-3, 2) and (2, 12), where will line 1 and line 2 intersect? a)(-4,0) b)(-2,-3) c)(-6,2) d) (-2,-2)
April 2, 2013

math
in the problem its doesn't give me an ^ its a table for an equation in this case y1=6+2x and i need to find the "y1"
April 2, 2013

math
y1=6+2x x1 y1 -3 ? -2 ? -1 ?
April 2, 2013

Number Theory
Yan was opening a new restaurant, so she went to the sign store to get letters to make a sign to hang above the storefront. When she got to the sign store, the only letters they had in stock were two copies of the letter 'X,' two copies of the letter 'E,' and ...
April 1, 2013

math
y1=6+2x x1 y1 -3 ? -2 ? -1 ?
April 1, 2013

math
y1=6+2x x1 y1 -3 ? -2 ? -1 ?
April 1, 2013

math
what is the slope of the graph? what does it mean in the context of the problem? the slope for the problem is 2 i don't understand the second question then it says what is the y-intercept and what does the y-intersept represent. for the problem the y-intercept is 3, the ...
April 1, 2013

math
what is the slope of the graph? what does it mean in the context of the problem? the slope for the problem is 2 i don't understand the second question then it says what is the y-intercept and what does the y-intersept represent. for the problem the y-intercept is 3, the ...
April 1, 2013

Biochemistry
B! i need B, my brain sucks and won't answer B
March 31, 2013

Algebra 2
Solve 12^x = 14^3x. I know I need to make the bases the same, but I don't know how.
March 22, 2013

Algebra 2
Thank you!
March 22, 2013

Algebra 2
Find a value(s) that makes the expression y^2 - 16 ---------- undefined. y^2 + 16 y=4i?
March 22, 2013

physics
a 2.1 weight receives 210 j of kinetic energy by a launcher, which is pointed straight up.
March 21, 2013

physics
a 2.1 weight receives 210 j of kinetic energy by a launcher, which is pointed straight up.
March 21, 2013

math
Identify a variable that could be described with an approximately normal distribution, and explain how you came to this conclusion.
March 5, 2013

Chemistry
A 1.44-g sample of an unknown pure gas occupies a volume of 0.336 L at a pressure of 1.00 atm and a temperature of 100.0 degrees Celsius. What is the unknown gas?
March 4, 2013

Chemistry
A 1.44-g sample of an unknown pure gas occupies a volume of 0.336 L at a pressure of 1.00 atm and a temperature of 100.0 degrees Celsius. What is the unknown gas?
March 4, 2013

science
what combination of mediums will produce a stright line of light? how do you correct for hyperopia? how do you correct for myopia? what kind of people have an astigmatism? what part of the eye act as a lens and what part acts as a screen? how do different types of lenes bend ...
March 3, 2013

Math:o
Thank you.
February 24, 2013

Math:o
It takes a florist 3h 15min to make 3 small centerpieces and 3 large cebterpieces. It takes 6h 20min to make 4 small centerpieces abd 7 large centerpieces. How long does it take to make each small centerpiece and each large centerpiece? Write and solve a system of equations to...
February 24, 2013

Algebra
Thank you so much!:)
February 24, 2013

World Geography
The first one is c.
February 19, 2013

computer
Assume you have a computer that contains 2GB of memory. It contains four memory slots. Each slot can contain 128 MB, 256 MB, 512MB, 1 GB, or 2GB memory modules. Currently, each slot contains a 512MB memory module. What combinations of memory modules will satisfy your memory ...
February 17, 2013

algebra 1
The value, V, of a certain car after n years is given by the formula below. V = 32,000(0.75)n Based on the formula, what is the value of this car after 3 years? is it 72000
February 15, 2013

algebra 1
so is the answer 4 because 21*4 = 84
February 15, 2013

algebra 1
The formula for the volume, V, of a prism is V = Bh, where B equals the base area, and h is the height of the prism. What is the height of a prism with base area 21 cm2 and volume 84 cm3?
February 15, 2013

algebra 1
Josh hit a baseball straight up into the air. The equation below describes the height of the ball (h), in meters, as a function of time (t) in seconds. h(t) = -9.8t² + 30t + 1.5 What is the height of the ball after 3 seconds? i keep getting -195.9
February 15, 2013

algebra 1
not it is 71.6 right
February 14, 2013

algebra 1
is it 145.1
February 14, 2013

algebra 1
The formula for the height of a falling object is shown below, where h is the height of the object in meters, t is the time in seconds, and k is the height, in meters, from which the object began its fall. h = –4.9t² + k If a rock is dropped from a building that is ...
February 14, 2013

Physics Grade 11
The normal force is always perpendicular to the surface. So if the box is on a horizontal surface the Normal force it will be equal to the weith of it (mass *gravity) N= m*g N=117.6N the friction force always oposses to the movement and it will be equal to the horizontal ...
February 10, 2013

Math
Simplify the expression. 9p - 2q - 3 + 10q - 4r + 12
February 4, 2013

ENG
I'm trying to write a paragraph with levels of generality for English. Here's what I have so far... I need help with grammar and punctuation... also does it make sense ? In the city of Carson, California there is a small house on Mesa Boulevard that is shared among ...
January 29, 2013

Math question
How many gallons of organge juice are in a full size family jug? I think 1 gallon?
January 27, 2013

accounting
What is the value of the following future amount? a)RM800 to be received 10 years from now discounted back to present at 10%.
January 27, 2013

accounting
What is the present value of RM6, 500 to be received 10 years from today if our discount rate is 10%?
January 27, 2013

accounting
Adam place RM2, 000 in a saving account paying 5% interest compounded annually, how much will Adam account accrue to in a)10 years b)15 years
January 27, 2013

math
What is the value of the following future amount? a)RM800 to be received 10 years from now discounted back to present at 10%. b)RM1, 000 to be received 8 years from now discounted back to present at 3%.
January 24, 2013

math
What is the present value of RM6, 500 to be received 10 years from today if our discount rate is 10%?
January 24, 2013

math
Adam place RM2, 000 in a saving account paying 5% interest compounded annually, how much will Adam account accrue to in 10years and 15years
January 24, 2013

Algebra 2
Thank you!
January 23, 2013

Algebra 2
Simplify (2y)(4xy^3). 8xy^4?
January 23, 2013

Algebra 2
Simplify the polynomial [(6x-8)-2x]-[(12x-7)-(4x-5)]. I came up with two answers: 36x^2 - 72x + 35 or -12x^2 + 8x - 2 Are either one of these the correct answer?
January 23, 2013

Algebra 2
Factor completely 4ab + 2a + 6b + 3 (2a + 3) (2b + 1)?
January 23, 2013

fractions in simplest form
i have no clue what it is
January 17, 2013

Pre-AP physical science
What is the best way to set-up my science fair project that is 40% of my 2nd semester grade and credits ?? A little lost
January 14, 2013

Algebra 2
Thank you!
January 8, 2013

Algebra 2
Solve by completing the square 3x(sqaured) - 8x - 6 = 0. Is it 4 - the square root of 34 / 3 and 4 + the square root of 34 / 3?
January 8, 2013

Math
the shadow if a metre stick is 1.3m long when a students shadow is 2.0m long. How tall is the student?
December 17, 2012

Reading
I think the answers are 5a 6d 7c 8d 9a 10b 11c 12b
December 7, 2012

Reading
Choose the option that correctly identifies the words in () in each sentence. 5. (Stretching for 210 miles) , the Thames is in England. (1 point) prepositional phrase gerund phrase participial phrase appositive phrase 6. (Eating flesh with razor-sharp teeth) is how piranhas ...
December 7, 2012

MATHS
The population of town A increases from 1,346 to 1,500. In the same period, the population of town B increases from 1,546 to 1,800. a. Find the percent of increase in population for town A and for town B. b. Which town had the greater percent of increase? Don't know what ...
December 6, 2012

math
a carpet for a small room measuring 4 ft by 7.5 ft cost $120 how much would it cost for a carpet (with the same price per square foot) for a bigger room that measures twice as long and three times as wide
December 5, 2012

science
thank you
November 29, 2012

science
HELP FAST!!!!!!!!!!!!!!!! If you see that a hot-air balloon is rising above the top of a hill, what is the top of the hill called? A. delta point B. distance system C. coordinate system D. reference point
November 29, 2012

English
Please help i need to put this sentences in order and combine them in order to make sense. 1. The pizza sits on the table. 2. It is fresh from the oven. 3. It is in the middle of the table. 4. Its crust rises up. 5. The crust is thick. 6. The crust is golden brown. 7. It is ...
November 27, 2012

English
Combine the sentences below into a brief paragraph,using clear and efficient language.Remember that each sentence contains some information that is essential to the meaning of the overall paragraph; do not omit any necessary details. When you have completed the exercise, ...
November 27, 2012

Math
The population of a southern city follows the exponential law. If the population doubled in size over 13 months and the current population is 30,000 what will the population be in 5 years from now?
November 23, 2012

US History
What is the Article of Confederation?
November 22, 2012

Science
What do you think would happen to the rates of photosynthesis of seagrass and algae if their habitat became muddied when channel clearing caused sediment to stay mixed in with the water? Explain.
November 21, 2012

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