Thursday

November 26, 2015
Total # Posts: 88,338

**science**

How many parts listed make up a plant or animal cell nucleus?
*October 29, 2015*

**Biology**

what do the following do in a cell: Smooth endoplasmic reticulum Mitochondrion Ribosomes Golgi apparatus Nuclear envelope
*October 29, 2015*

**math**

negative 3g+6+2g=15
*October 29, 2015*

**chemistry (helppp me)**

what is the bond order for BeF2? according to the lewis structure? ....according to MO diagrams its 0. 16 valence e-
*October 29, 2015*

**Math**

HELP!! If a blueprint for landscaping a yard and it has a scale of 1/2" to 1 foot, and the blueprint is a rectangle with 18 inches by 22 inches. What are the dimensions of the yard?
*October 29, 2015*

**english**

mary c curtis
*October 29, 2015*

**Biology**

A horse breeder has a black horse named Luca and he isn't certain about the horse's genetics. A purebred horse will be worth much more than a hybrid horse so he compiled all the information about the Luca and Luca's parents before approaching you. - Black is the ...
*October 29, 2015*

**chemistry**

if there are 8 homo orbitals, how do i know how many lumo orbitals there are?
*October 29, 2015*

**chemistry**

what is the bond order for BeF2?
*October 29, 2015*

**statistics **

one of the points in a set of points if (4,8). What is the residual for this point if the equation of the regression line for these points is y=3.6+1.8x
*October 29, 2015*

**spanish**

Tú ____________________ de los Estados Unidos. a. soy c. es b. son d. eres
*October 29, 2015*

**Science **

The Sun's surface layer is called the photosphere True or false? I think the answer is true. A star system has at least 3 stars. True or false? I think the answer is false. I am not completely sure on these. Could someone check them for me?
*October 29, 2015*

**technoligy **

using NOT when searching allows you to?
*October 29, 2015*

**Algebra**

an alloy of metals is 20% copper. another alloy is 70% copper.how much of each should be used to make 80 gram of an alloy that is 50% copper?
*October 29, 2015*

**Language Arts**

first you can write the answers and you write i can heip thing to do the so how you can you do and how you can not do and you find your thing to write and you can not put not the answers.
*October 29, 2015*

**Chemistry**

What is the mass of an atom's nucleus called?
*October 29, 2015*

**Chemistry**

So, when we add just one proton (no electrons or neutrons), it changes to beryllium-8?
*October 29, 2015*

**Chemistry**

Does adding a proton to lithium-7 make it a positively charged ion?
*October 29, 2015*

**Social Studies, Ms. Sue**

My teacher considers the invention of the telephone part of the industrial revolution
*October 29, 2015*

**Science**

Name the components of the respiratory system in the order incoming air would encounter then during breathing.
*October 29, 2015*

**algebra**

Jane has six more nickels than quarters and two fewer dimes than nickels. If she has a total of $2.70, how many of each type of coin does she have?
*October 29, 2015*

**Science**

I'm not sure, but look it up, maybe that will help
*October 29, 2015*

**stoichiometry**

What impact would adding twice as much Na2CO3 than required for stoichiometric quantities have on the quantity of product produced?
*October 29, 2015*

**AP CALCULUS HELP**

still confused
*October 28, 2015*

**AP CALCULUS HELP**

the problem was: 2z dz/dt= 2x dx/dt + 2y dy/dt dz/dt= ??? ( x dx/dt + y dy/dt)
*October 28, 2015*

**AP CALCULUS HELP**

first, we must find 2z(dz/dt)=2x(dx/dt) + 2y(2y/dt) simplifying, we get: dy/dt=???(dx/dt + dy/dt) What is that simplified?
*October 28, 2015*

**World History**

Thank you so much Reed you're a life saver :)
*October 28, 2015*

**World History**

I need two causes and two effects for the following: The Italian Renaissance, The Medici family takes control of Florence, Mannerism moves to Italy, French Wars of Religion ends, John Locke develops theory of government. Please help I can't get any and I only have a little...
*October 28, 2015*

**math**

Hasan has 18 3/4 yards of fabric. It takes 3 1/6 yards to make a pillowcase. Has an plans to make as many pillowcases as he can. How many yards of fabric will be left over?
*October 28, 2015*

**Social Studies**

What is the meaning of Gulf for a fifth grader?
*October 28, 2015*

**water & climate**

11.25
*October 28, 2015*

**Math**

Find the value of cos2x. cosx = -2/3 pi/2 < x < pi Is this -1/9?
*October 28, 2015*

**Math**

How do I get (sinx cosy + cosx siny) (cosx cosy + sinx siny) in the form of 1/2(sin2x + sin2y)?
*October 28, 2015*

**statistics **

what is the difference between the coefficient of determination and residuals
*October 28, 2015*

**college algebra help********

You intercepted the following message from Boris and Natasha. 25 19 19 30 41 17 15 26 27 41 15 28 18 41 18 29 41 34 22 19 41 27 15 34 22 You do not now the encoding or decoding function but from previous work with Boris and Natasha you know their encoding and decoding ...
*October 28, 2015*

**psychology**

What are the steps of the scientific method?
*October 28, 2015*

**math**

Mary purchased 4 blouses, 2 jackets, and 3 skirts. How many different outfits using a blouse, a jacket, and a skirt are possible?
*October 28, 2015*

**Math**

Are these the solutions to sin2x sinx = cosx? pi/2, 3pi/2, 3pi/4, pi/4, 7pi/4, 5pi/4
*October 28, 2015*

**SCIENCE\PHYSICS**

If a ball is displaced from O to A along a straight line with a distance of 5.0m,what is the resultant displacement and the total distance by the ball?
*October 28, 2015*

**geometry**

Triangle ABC is a right triangle. If side AC=5 and side BC=6, What is the measure of side AB which is the hypotenus
*October 28, 2015*

**PHYSICS**

A 48.7-g golf ball is driven from the tee with an initial speed of 47.5 m/s and rises to a height of 27.5 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 6.60 m below its highest point?
*October 28, 2015*

**PHYSICS**

A 81.8-kg skier rides a 3300-m-long lift to the top of a mountain. The lift makes an angle of 12.9 ° with the horizontal. What is the change in the skier's gravitational potential energy?
*October 28, 2015*

**writing please someone help!!!**

which traits are strongest in your persuasive essay: ideas, organization, voice, word choice, sentence, fluency, or conversation? provide textual evidence from your essay to support your answer. Please can someone help I'm having trouble figuring this one out!!!!
*October 28, 2015*

**math**

Don bought a long sleeve shirt for 24.80. If the sale was 20% off, how much was the shirt originally? A)32.00 B)49.60 C)31.00 D)34.50 my answer is 31.00
*October 28, 2015*

**math**

Don bought a long sleeve shirt for 24.80. If the sale was 20% off, how much was the shirt originally? A) 32.00 B) 49.60 C) 31.00 D) 34.50
*October 28, 2015*

**maths**

45/3 = 15
*October 27, 2015*

**Physics**

3.58m/s
*October 27, 2015*

**REALLY NEED HELP**

Joyce is buying a pair of jeans for $39.99. The jeans are on sale at a 20% discount and the sales tax is 7%. Write a function T(x) to represent the total cost of an item with 7% sales tax. Find the composite function (T of S)(x).Use the composition to find the final cost of ...
*October 27, 2015*

**Math**

How do I find the solutions for cos2x - cos6x = 0?
*October 27, 2015*

**chemistry DR BOB**

not balanced. C2H5OH+ 3O2 >>> 2CO2 + 3H2O
*October 27, 2015*

**math (algebra)**

A construction crew built 6 miles of road in 2/7 days. what is the unit rate in the miles per day?
*October 27, 2015*

**science**

1 S atom.
*October 27, 2015*

**math**

Dina has 22 dimes in his piggy bank. He has 5 times as many pennies. How much money does Jim have all together? A) 3.30 B)1.22 C)3.50 D) 1.10
*October 27, 2015*

**Chemistry**

A 4.30g sample of solid BaCl2 2H2O was heated such that the water turned to steam and was driven off.Assuming ideal behavior, what volume would that steam occupy at 1.00atm and 373K?
*October 27, 2015*

**SS**

It's actually not on my textbook. It's on the page you posted.
*October 27, 2015*

**SS**

It says, "Sixty miles (96.5 kilometers) southeast of San Lorenzo stood La Venta." 75 miles seems close enough?
*October 27, 2015*

**SS**

What was the approximate distance from San Lorenzo to La Venta? A. 150 miles B. 100 miles C. 75 miles D. 25 miles I think it's C. It's not B.
*October 27, 2015*

**Langauge arts**

:)
*October 27, 2015*

**Langauge arts**

Which of the following is a proper noun? ground friend Georgia*** vegatable
*October 27, 2015*

**Social Studies PLEASE HELP!**

1. jamestown 2. puritans 3. the dutch surrendered new york to the british fleet 4. spanish florida and british south carolina 5. military colonies 6. people elect representatives 7. england and france 8. proclamation of 1763 9. tobacco 10....I think is C unsure ://
*October 27, 2015*

**Math**

5756
*October 27, 2015*

**Math**

Use the product-to-sum formulas to write the product as a sum or difference. sin(x+y) * cos(x-y)
*October 27, 2015*

**Accounting**

15.000
*October 27, 2015*

**Math**

Pencils are sold in packages of 5.explain why you need 6 packages in order to have enough for 27 students.
*October 27, 2015*

**PHYSICS**

THREE TOWNS A,,B,C ARE SITUATED SO THAT |AB|=100KM . THE BEARING OF B FROM A IS 060 AND THE BEARING OF C FROM A IS 290 DEGREES . CALCULATE THE DISTANCE OF C FROM A .
*October 27, 2015*

**Algebriac Expressions**

One number is 5 less than a second number. Twice the second number is 4 less than 4 times the first. Find the two numbers.
*October 27, 2015*

**chemistry**

0.97
*October 27, 2015*

**analytical chemistry**

The nitrogen content of a .2476 g sample of a protein was determined by the Kjeldahl method. The NH3 produced with the whoosh was distilled into exactly 50.00mL of HCl in the receiving flask, which was in excess of the amount required to capture the ammonia gas. The excess HCl...
*October 27, 2015*

**algebra**

a number increased by 7 is minus 23
*October 27, 2015*

**physics**

a stone is thrown vertically upward at a speed of 10 m/s from a cliff that is 95m high. How long will it take the stone to reach the bottom?
*October 26, 2015*

**CALCULUS TEST TOMORROW**

If two resistors with resistances R1 and R2 are connected in parallel, as in the figure below, then the total resistance R, measured in ohms (Ω), is given by 1 R = 1 R1 + 1 R2 . If R1 and R2 are increasing at rates of 0.3 Ω/s and 0.2 Ω/s, respectively, how fast ...
*October 26, 2015*

**COLLEGE CALCULUS HELP**

If two resistors with resistances R1 and R2 are connected in parallel, as in the figure below, then the total resistance R, measured in ohms (Ω), is given by 1 R = 1 R1 + 1 R2 . If R1 and R2 are increasing at rates of 0.3 Ω/s and 0.2 Ω/s, respectively, how fast ...
*October 26, 2015*

**statistics**

all patients who present to the emergency services department with a suspected acute myocardial infraction are expected to receive an ECG within ten minutes of their arrival. Of the 56 patients who had a suspected AMI during the last quarter, 32 had an ECG within the specified...
*October 26, 2015*

**math**

The effective rate of a $25,000 non-interest-bearing simple discount 10%, 90-day note is
*October 26, 2015*

**intro to computer programming**

Write a program that asks the user to enter the number of packages purchased. The program should then display the amount of the discount (if any) and the total amount of the purchase after the discount. Your program should use a loop to ask the user how many orders they need ...
*October 26, 2015*

**spanish**

unscramble lanesbocto for me please! thank you
*October 26, 2015*

**Math**

rhombus
*October 26, 2015*

**Physics**

A rocket is launched at an angle of è = 48° above the horizontal with an initial speed vi = 62 m/s, as shown below. It moves for 25 s along its initial line of motion wth an acceleration of 25.6 m/s2. At this time, its engines fail and the rocket proceeds to move as...
*October 26, 2015*

**Physics**

A place kicker must kick a football from a point 31.2 m from a goal. As a result of the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked the ball leaves the ground with a speed of 21.3 m/s at an angle of 53° to the horizontal. By how much does the ...
*October 26, 2015*

**chemistry**

nevermind, all clear on this matter, i guess i should try harder before posting on here haha
*October 26, 2015*

**chemistry **

hmmm this is not making sense at the moment. the question: How many milliliters of 0.246 M HNO3 should be added to 213 mL of 0.006 66 M 2,2-bipyridine to give a pH of 4.19? the equation: HNO3- + 22bipy --> Protenated bipy + NO3 2- u want to find the moles of HNO3... there ...
*October 26, 2015*

**pre calc**

Find all zeros of the polynomial. (Enter your answers as a comma-separated list.) P(x) = x3 − 11x2 + 33x − 35
*October 26, 2015*

**science **

Explain the difference interactions that can take place when the beam of light hits the glass tank and then enters the water. Why does the beam lof light change direction when it enters the water? I need a full response/ explanation. It would really help me out thanks
*October 26, 2015*

**French**

Are these sentences grammatically correct? 1. On peut s'amuser quand on est vieil. 2. Il est vieil, alors il a moins de choses à faire.
*October 26, 2015*

**Chemistry**

Calculate the volume 0.1 M of acetic acid and 0.1 M sodium acetate required to prepare 300 mL of 0.05 M acetate buffer solution at pH 5.5.
*October 26, 2015*

**SCIENCE HELP PLEASE**

1.Why can certain stars sometimes be identified as eclipsing binary stars? A. They are brighter than any single star. B. They are all white dwarfs C. They become dimmer at regular intervals*** D. They are cool red stars. 2. Which of the following is a major difference between ...
*October 26, 2015*

**maths**

what is the probability of picking the day that beings with the day letter 'T'? (likely/impossible)
*October 26, 2015*

**maths**

what is the probability of picking Friday at random? (likely/impossible)
*October 26, 2015*

**science '**

a book with an area of 0.0800 m/2 and a weight of 1.00 n is lying on the table . find the pressure on the surface of the table caused by the weight of the book.
*October 26, 2015*

**schience **

a book with an area of 0.0800 m/2 and a weight of 1.00 n is lying on the table . find the pressure on the surface of the table caused by the weight of the book.
*October 26, 2015*

**Chem 2 lab**

the acid dissociation constant for acetic acid is 1.85x10^-5. Calculate the pH at the equivalent point and the pH at one-half the equivalence point for the titration of 25.00 mL of 0.100 M acetic acid with 0.100 M NaOH? Its been a little while since ive done one of these ...
*October 25, 2015*

**Physics I**

torque=force x arm = 40j x (2i-5j+3k)=-80k+120i check that.
*October 25, 2015*

**Algebra 2**

No, I need help with making the graph
*October 25, 2015*

**Math**

Find the solution. 1. sqrt2 sin x + 1 = 0 My ans: x = 5pi/4 + 2npi and 7pi/4 + 2npi 2. sec x - 2 = 0 My ans: x = pi/3 + 2npi and 5pi/3 + 2npi
*October 25, 2015*

**Calculus**

I am looking for 3 D volumes. Finding A(y) through similar triangles is difficult in terms of 3 D. I still do not understand how to do them despite looking at the book examples. I know that after finding A(y) I have to integrate it to find the volume but the first step is to ...
*October 25, 2015*

**Calculus**

Hello, Tutors! I am struggling on how to do problems related to finding the volume using integrals. Could you please help me? Any easy-to understand resources? Thank You for all your help. I am thankful for you tutors!!!!!!!
*October 25, 2015*

**chemistry **

what is the anion and cation of Na2CrO4
*October 25, 2015*

**Calculus**

1. Calculate the population within a 7-mile radius of the city center if the radial population density is ρ(r) = 5(5 + r2)1/3 (in thousands per square mile). (Round your answer to two decimal places.) 2. A population of insects increases at a rate 280 + 8t + 1.5t2 insects...
*October 25, 2015*