Monday

November 30, 2015
Total # Posts: 403

**Physics**

Randy throws a tennis ball horizonally to hit a wall 20 m away. If the ball hits the wall 1.5s after it is thrown, what is the horizontal component of the balls velocity?
*November 11, 2015*

**math**

You and your friends form a band. You want to record a demo. Studio A rents for $100 up front plus $50 per hour. Studio B rents for $50 up front plus $75 per hour. After how many hours will the rent be the same? What will the rent be? .......... PLEASE HELP. I NEED THIS TO BE ...
*November 1, 2015*

**Math**

Dylan plants grass in a rectangle space behind the clump house.nthe area of the space was 70 ft. If the length of the space is 14 ft. What's the width of the space
*October 28, 2015*

**public speaking**

I am trying to pick a motivational speech topic where I have to convince someone to do something (i.e stop shopping at a store, join a particular organization, etc). However, we have to have 5 credible sources, one of which has to be a peer-reviewed article. So, this limits ...
*October 18, 2015*

**Math**

If a rectangle has four congruent sides, it is a square. A square has perpendicular diagonals. Conclusion: A rectangle has diagonals that are always perpendicular. Which of the following is correct The conclusion is valid by the law of syllogism. The conclusion is invalid ...
*October 15, 2015*

**Math **

I don't understand how to solve this equation -2+5x-7=3x-9+2x could you help me out?
*October 9, 2015*

**first part**

no. of componenents = 2 (Na2SO4 and water - as each phase can be described by these two components only) no. of phases = 3 ( solid and liquid and vapor) degrees of freedom = 2-3+2 = 1
*October 3, 2015*

**Biology**

how does the number of electrons in an atom determine what kind of bond it can form?
*September 11, 2015*

**Biology**

I did a lab and have been graded already. One of the questions asked us to pick good scientific questions from a list of choices. One of the choices read, "What soil properties determine the resulting color of a plant's flowers?". Note: I have changed the wording...
*September 5, 2015*

**geometry**

there is a rectangular parking lot with a length of 2x and a width of x what is the ratio of the perimeter of the parking lot to the parking lot, in terms of x?
*August 4, 2015*

**math**

Rationalize the denominator of 2sqrt7/x+sqrt7 I need steps to do this. Been a while since high school. Thanks
*July 12, 2015*

**physics**

GPS satellites orbit the earth about 20,000 km above the surface of the earth. The radius of the earth is 6,371 km. What is the acceleration due to earth’s gravity on the GPS satellites? i've tried fooling around with the A = V^2/ R and V = 2pir/T equations, but I ...
*May 1, 2015*

**Geometry**

Sarah is filling a glass sphere with decorative sand. The radius of the sphere is 2 inches. Which is closest to the minimum amount of sand Sarah needs to completely fill the glass sphere?
*April 23, 2015*

**indian ridian ridge **

Simplify the given expression to rational exponent form and justify each step by identifying the properties of rational exponents used. All work must be shown. 1/cubed root of x to -6 exponent
*March 7, 2015*

**math**

If you place $2,000.00 in a savings account with an interest rate of 4.5%/month versus an account with a rate of 3.75%/month, how much more interest could you earn in that month using the first account?
*March 2, 2015*

**Math**

If you place $1000 in a savings account with an interest rate of 5.25% a month how much should you earn an interest at the end of the month?
*March 2, 2015*

**Pre-Algebra**

It wont let me upload it ugh
*February 23, 2015*

**Pre-Algebra**

1.) if m<1=43 what is m<4? a: 53 b: 43 c: 37 d: 47 2.) if m<1=55 what is m<5? a: 55 b: 40 c: 35 d: 25 3.)if m<4=25 wht is m<8? a: 105 b: 75 c: 175 d: 25
*February 23, 2015*

**chemistry (Bohr model)**

The second ionization energy of He is almost exactly four times the ionization energy of H, and the third ionization energy of Li is almost exactly nine times the ionization energy of H: IE (MJ mol-1) H(g) --> H +(g) + e- (1.3120) He+(g) --> He2+(g) + e- (5.2504) Li2+(g...
*February 9, 2015*

**physics**

A particle carrying a charge of 6.0uC is located at the origin of a rectangle coordinate system, and a particle carrying a charge of 4.0uC is located at (0,5.0m). What are the magnitude and direction of the electric field at the positions (5.0m,0), (-5.0m,0), and (0,-5.0m)?
*February 5, 2015*

**physics**

A positively charged solid sphere of radius 100 mm has a uniform volume charge density of 250 nC/m^2. Determine the electric field (a) 20 mm, (b) 90 mm, and (c) 110 mm from the center of the sphere.
*February 5, 2015*

**Organic Chemistry**

If you have 5.6 mL of 95% hexanes to 5% ethyl acetate, how many mL of 85% hexanes to 15% ethyl acetate can you make? Assume unlimited supply of pure ethyl acetate.
*February 2, 2015*

**Inorganic Chemistry**

Use Slater's rules to calculate the effective nuclear charge, Z* or Zeff, for a 4f electron in Eu, Tb, and Dy.
*February 2, 2015*

**Column Chromatography**

If you have 5.6 mL of 95% hexanes to 5% ethyl acetate, how many mL of 85% hexanes to 15% ethyl acetate can you make? Assume unlimited supply of pure ethyl acetate.
*February 2, 2015*

**math**

5/7 times9/10
*November 22, 2014*

**math**

1/3 divided by 5/8
*November 22, 2014*

**math**

somebody please help me
*November 22, 2014*

**math**

4/5 times 3/4
*November 22, 2014*

**math**

4/3 times 3/4
*November 22, 2014*

**History(Checking Answers)**

Thanks , Okay so is it Northeast? and For the first answer Climate that supported a large agricultural base..
*November 18, 2014*

**U.S, History**

You're welcome.
*November 18, 2014*

**U.S, History**

I believe its C
*November 18, 2014*

**English**

How can I make this sentence present tense? Or is it already present tense? The problem I'm having is with the word "banished" which is past tense. And my teacher wants us to write in the present tense. I have the main verb present so does that make the whole ...
*November 9, 2014*

**AP Chem**

NO2 + H2 <-> NO + H2O [H2] = .30 mol/L [NO2] = .20 mol/L [NO] = [H20] = .70 mol/L @ 1000K A. What is the mole fraction of NO in the equilibrium mixture? B. Calculate Kc C. Determine Kp in terms of Kc D. If system is cooled to a lower temperature, 35% of NO is converted ...
*October 28, 2014*

**English composition**

I'm writing a paper to explain a concept of the bevel Ella Minnow Pea. I've come up with a thesis statement and my teacher has approved it, but I'm just stuck as to what I'm writing about. The assignment instructions asks "How does Dunn legitimize his ...
*October 26, 2014*

**English - grammar**

How to decide how to end a sentence with he/him or she/her? Ex. We can not eat before he? or him?
*September 30, 2014*

**Algebra**

Interval notation: (-7,3) If it was included (less than or equal to/greater than or equal to) you would use a bracket [ or ].
*September 30, 2014*

**physics**

A small relief package is dropped by a helicopter that is descending steadily at 2.0 m/s. a) After 2.5 s, what is the speed of the relief package? b) After 2.5 s, how is the package below the helicopter? I think I need to use the kinematic equations.
*September 28, 2014*

**Algebra1**

Umm can u please say something more specific
*September 22, 2014*

**Algebra1**

Which variable can you replace with a number 10a + 6c = $ 80 ❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️
*September 22, 2014*

**chemistry**

A room contains 47kg of air. How many kilowatt-hours of energy are necessary to heat the air in the house from 7∘C to 26∘C? The heat capacity of air is 1.03 J/g∘C
*September 10, 2014*

**chemistry**

Calculate the final temperature of 34mL of ethanol initially at 13∘C upon absorption of 938J of heat. (density of ethanol =0.789 g/mL)
*September 10, 2014*

**science**

what is the weight of the ethyl alcohol that exactly fills a 200.00 ml container? The density of ethyl alcohol is 0.789 grams/ml
*September 9, 2014*

**Math 11**

From a window in a building 20 m above ground the angle of depression of the top of a statue across the street is 30 degrees, and the angle of depression of the base of the statue is 34. How tall is the statue?
*June 8, 2014*

**Math 11**

From a weather balloon high in the air, the angle of depression of a ground marker is 27.8 degrees. If the balloon rises 345 m straight up the angle of depression from this higher point is 46.2 degrees. How high above the ground is the balloon?
*June 8, 2014*

**math**

THAT RIGHT\
*April 28, 2014*

**Physics**

A disk at rest experiences a constant angular acceleration for t = 85 s, at the end of which it is spinning with a frequency of f = 45 rpm. Please answer the following questions. A)Write an expression for the magnitude of the angular velocity of the disk after the acceleration...
*April 26, 2014*

**Math**

OH OK I TELL YOU
*April 26, 2014*

**Math**

F(x)=x^2-2x-3 plz help me slove this ? HELP ME I DO NOT UNDERSTAND THIS HELP ME PLZ
*April 26, 2014*

**math**

OH OK THANK YOU
*April 26, 2014*

**!math (3)**

ffhffvyffcyfgcyffyfifyislrygfyfqlwlygygyilwfhgie;
*April 25, 2014*

**letter**

IS THAT A GOOD LETTER MS. SUE
*April 25, 2014*

**letter**

OK ITS JUST MY COMPUTER IT KEEP PUT DATE
*April 25, 2014*

**letter**

How can I write a feel better letter to Miley Cyrus? please help and give me so examples please help HOPE YOU FEEL BETTER [DateDear Miley cyrus I was quite upset to hear that you are feeling ill. However, I am every certain about you and i hope you will feel better in no time...
*April 25, 2014*

**letter**

HOPE YOU FEEL BETTER [DateDear Miley cyrus I was quite upset to hear that you are feeling ill. However, I am every certain about you and i hope you will feel better in no time. Please accept, then, my sincerest wish that you get better soon. we can meet each other some day ...
*April 23, 2014*

**letter**

hold on wrong letter
*April 23, 2014*

**letter**

this is a good letter to send to miley cyrus yes or no HOPE YOU FEEL BETTER [Date] [NAME, COMPANY AND ADDRESS, ex. Dear Miley cyrus I was quite upset to hear that you are feeling ill. However, I am every certain about you and i hope you will feel better in no time. Please ...
*April 23, 2014*

**letter**

How can I write a feel better letter to Miley Cyrus? please help and give me so examples please help
*April 23, 2014*

**ENGish**

1. What are the characteristics of an effective television newscaster? Explain. 2. Why are so many people over the age of twenty-one entering college? Discuss. 3. What could be done to make the public less hesitant to report crime? 4. Do Americans seem unable to relax in ...
*April 21, 2014*

**English**

It's C alex my brother sorry I meant its D that the right answer I think good luck my brother
*April 16, 2014*

**social studies check answers**

yeah what are the answers to 3 and 5 then
*April 16, 2014*

**social studies**

number 4 is b
*March 18, 2014*

**social studies**

Kyle you put 7 as D and 8 as C there really B and B.
*March 17, 2014*

**geometry**

The measure of an exterior angle of a regular polygon is given. Find the number of sides of the polygon? Given number is 72?
*March 3, 2014*

**Math**

In a right triangle, the measure of the legs are 20 and 3x, and the measure of the hypotenuse is 4x+1. Find the value of x.
*March 2, 2014*

**math**

Use 17 connecting cubes to make a kitchen model. Model is is the shape of rectangle and is one cube high. How many different ways to make the model?
*February 27, 2014*

**Math**

Find the measure of each angle to the nearest tenth of a degree. sin A=0.7245
*February 6, 2014*

**Math**

Find the measure of each angle to the nearest tenth of a degree. sin A=0.7245
*February 6, 2014*

**algebra**

If Will gives Molly $9 dollars he will have the same amount of money as her. If Molly give Will $9, the ratio of money she has to the money will has will be 1:2. How much money does will have in the beginning?
*February 5, 2014*

**cook**

I want to know wat all the weighing equipment is
*February 4, 2014*

**Help!!!**

thanks Emily got a 100%
*February 3, 2014*

**Math**

4x+16=x(x)-2x
*January 9, 2014*

**Math**

Solve for x and y 7x=2y 4x=y+2
*December 15, 2013*

**math**

Solve for x and y 4x-y=4 2y=3x+17
*December 15, 2013*

**science**

a misconception of the sun is stronger at sunrise and weaker at sunset
*November 19, 2013*

**Math**

The question i'm having a problem with is the following: copy and complete: 3t-4 is a(n)_?expression and 5+13 is a(n)_? Expression. Do they mean a numerical expression?
*September 5, 2013*

**health**

it is B
*June 30, 2013*

**math**

The number of students at a university is 1320, and the number increases by 8% each year. Write an exponential function to model this situation. Then find about how many students there will be in 5 years.
*June 9, 2013*

**hyperbolas**

Find an equation for the hyperbola whose graph has vertices (+/-5,0) and foci (+/-7,0)
*May 7, 2013*

**hyperbolas**

Find the equation of the hyperbola that has a center at (8,1), a focus at (3,1), and a vertex at (4,1).
*May 7, 2013*

**parabolas**

Find the equation and sketch the parabola that has vertex V (-1; 0) and focus F(-4; 0).
*May 6, 2013*

**precalculus- ellipses **

Consider the ellipse y^2=1-6 x^2. Its vertices are (0,A) with A= ? its foci are (0,+/-B) with B= ? its eccentricity is ? the length of its major axe is ? the length of its minor axe is ?
*May 4, 2013*

**precalculus**

Consider the ellipse 9 x^2 + 36 y^2 = 64. the length of its major axe is ? the length of its minor axe is ?
*May 4, 2013*

**precalculus **

Consider the ellipse 9 x^2 + 36 y^2 = 64. the length of its major axe is ? the length of its minor axe is ?
*May 4, 2013*

**precalculus **

Find an equation for the parabola that has its vertex at the origin and directrix x=-9. If your answer is in the form x^2=Ay, then input here: A= if your answer is in the form y^2=Ax, then input here: A= .
*May 3, 2013*

**Biology**

YES IT IS REAL HARD
*April 29, 2013*

**statistics**

Your mail-order company advertises that it ships 95% of its orders within three working days. You select an SRS of 100 of the 5000 orders received in the past week for an audit. The audit reveals that only 91 of these orders were shipped on time. A) What is the sample ...
*April 24, 2013*

**precalc please help me**

If cos^4 3 x - sin^4 3 x = cos (g(x)), then g(x) = ??. For part (b), use a^4-b^4=(a^2-b^2)(a^2+b^2)!
*April 21, 2013*

**precalc**

(cos3x)^4+(sin3x)^4=cos(g(x)) find g(x)
*April 21, 2013*

**precalc**

(cos3x)^4+(sin3x)^4=cos(g(x)) find g(x)
*April 21, 2013*

**precalc**

(cos3x)^4+(sin3x)^4=cos(g(x)) find g(x)
*April 21, 2013*

**pre calc**

(cos3x)^2+(sin3x)^2=cos(f(x)) find f(x)
*April 21, 2013*

**pre calc**

Use the sum-to-product formula to simplify the expression: If sin 52 + sin 8 = sin A, 0<A<90, then A =??? degrees.
*April 21, 2013*

**pre calc**

((cos^4)6x)-(sin^4) 6x=cos(g(x)) find g(x)
*April 21, 2013*

**pre calc**

(cos^2)3x+(sin^2)3x=cos(f(x)) simplify expression and find f(x)
*April 21, 2013*

**Algebra**

As a promotion, a store draws the name of a customers each week. The prize is a coupon for the store. If winner is not present at drawing, he cannnot claim the prize and the amount of the coupon increases for the next weeks drawing. the function f(x)= 20(1.2)to the x power, ...
*April 21, 2013*

**Math**

Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)/(sec^2 x))-1 = (f(x))^2 f(x)= ??
*April 14, 2013*