Wednesday

September 28, 2016
Total # Posts: 951

**Chemistry**

An element has three stable isotopes. One has a mass number of 63 and an abundance of 50%. The second has a mass number of 65 and an abundance of 30%. The third has a mass number of 67 and an abundance of 20%. Calculate the relative atomic mass of this element. I am so ...

*September 24, 2016*

**Biology**

why is protein folding important to enzyme activity?

*September 14, 2016*

**Science**

@Alexandria Wrong

*September 13, 2016*

**math**

32 cans for 7 dollars how much per can

*September 8, 2016*

**Social studies answer check please**

@Blupo is right.

*September 7, 2016*

**Linear Algebra**

Thank you very much Reiny I was stumped on that but thanks to your assistance I was able to solve the problem. Thank you very much!

*September 6, 2016*

**Linear Algebra**

The Vector v has a length of 15 and points at an angle of 30 degrees. The Vector u has a length of 17 and points at an angle of 55 degrees. What is u*v? I know to get my answer I need to use this format |u|*|v|*cos(theta) however I am stuck at setting up my vectors I only know...

*September 6, 2016*

**algebra 1**

whoops typo on your last problem I meant divide by 4 not 4x my apologies.

*September 6, 2016*

**algebra 1**

For your first question think about it like this -7+9=2 and -9+7=-2. -2 and 2 are not equal. For 4x-3=19 you need to add 3 to both sides of your equation and then divide by four on both sides to get your answer for x then plug in x to your equation and see if it equals 19 in ...

*September 6, 2016*

**Social Studies**

@I_Dont_Have_A_Name Thanks.

*September 1, 2016*

**Math**

1. B 2. D 3. C 4. B 5. C

*August 30, 2016*

**Math**

Yes its B

*August 29, 2016*

**Math**

Suppose that A and B are independent events such thatP(A)=.50 andP(B)=.30 . Find and P(A U B) and P(A upside down U B) .

*July 31, 2016*

**physic**

Does anyone actually answer questions on here?

*May 15, 2016*

**World History**

chicken noddles soup is very awesome to a lot of people pasta

*May 14, 2016*

**Mayh**

Bert gave me 1/2 of the candy bar then I gave 1/2 of what I have to my sister What fraction of the whole candy bar did my little sister get and what percent did she get

*May 10, 2016*

**Communication for Business**

1. Introduction A. Attention getter B. Area you are interested in career filed C Preview of points covered in body 11. Body A. Career field 1. Name of person interviewed

*April 16, 2016*

**Communication for Business**

Please could you help me with a good attention getter for a presentation on how interviews were done

*April 16, 2016*

**Chemistry**

If the heat of combustion for a specific compound is -1250.0 kJ/mol and its molar mass is 35.39 g/mol, how many grams of this compound must you burn to release 352.40 kJ of heat?

*April 11, 2016*

**Algebra**

Okay so first you find the 363 square root of 363. Then you find the square root of 27. Then you apologize to your connections academy teacher for cheating online. And there you have it! All three steps!

*April 8, 2016*

**Math**

Gina has 4 red ribbons, 6 times as many blue ribbons as green ribbons, and 1/4 as many green ribbons as red ribbons. How many ribbons does she have in all?

*April 5, 2016*

**Physics**

Two metallic spheres of mass .001 kg hang from a point by .3 m strings. Each is given the same amount and sign of charge. After equilibrium is reached, they each make an angle of 20 degrees relative to the vertical. Determine the amount of charge in each sphere.

*March 13, 2016*

**math**

how do you write twenty million three hundred thousand

*February 15, 2016*

**physics**

What is the mass which causes a spring of k = 100 N/m to stretch by 10 cm?

*February 15, 2016*

**Math**

What point on the unit circle corresponds to -5pi/4? A. (-Root2/2, Root2/2) B.(-Root3/2, 1/3 C.(-1/2, Root3/2) D.(0,1) D?

*February 12, 2016*

**math**

a boy runs 18.4 miles in 4.5 hours, how many miles can he run in 1 hour?

*January 4, 2016*

**Science**

HES RIGHT!! I MADE A 100%

*January 4, 2016*

**Finance**

Your program has a research and development project scheduled to start in January 2014 which is expected to take 40 months to complete. The project is expected to cost a total of $150 million (then-year dollars), with cost expected to be incurred as follows: FY Cost to be ...

*December 23, 2015*

**Math**

How'd you get 1,150,000? The answer would be 9583 I think?

*December 11, 2015*

**Math**

The Japanese yen corresponds to the american dollar. If the exchange rate is 150 Yen for 1 Dollar, then A japanese car sold in america for $10,000 will bring in 1,500,000 yen. If the exchange rate changes to 120 yen for each dollar, then what price in dollars would the car ...

*December 11, 2015*

**College algebra **

Matt and Jena, working together, can clean the house in 9 hours. Working alone, Jena takes three times as long as Matt. How long does it take Matt to clean the house.

*December 2, 2015*

**Grammer**

When ending a letter to a high gov't official with the phrase 'Respectfully Submitted', are both words capitalized, or just the first?

*November 28, 2015*

**AP Physics**

A 5.86 kg block initially at rest is pulled to the right along a horizontal surface by a constant, horizontal force of 14.4 N. The coefficient of kinetic friction is 0.14. The acceleration of gravity is 9.8 m/s 2 . Find the speed of the block after it has moved 4.98 m. Answer ...

*November 11, 2015*

**Math**

jeff rode bike 5 times as many miles as Vin. together they rode 18 miles. how many miles did each boy ride

*November 9, 2015*

**Cheistry **

single titration was performed which required 11.82 ml of .1 M Na2S2O3 the density of the original undiluted bleach unknown was 1.04 g/ml calculate the number of moles of ClO- in the sample titrated ClO- + 2I- + 2H+ === I2 + Cl- + H20 I2 + 2S2O2/3- === 2I- + S2O2/6-

*October 30, 2015*

**Life Skills**

How Does Empathy Positively Affect Education?

*October 28, 2015*

**Chemistry**

Are my answers correct? Calculate the molarity: a) 0.500 mol of NaOH in 2.45 L of solution. b) 24.1 g of NaCl in 853 mL of solution. a: 0.2 M b: 0.49 M

*October 22, 2015*

**Physical Science**

If a skydiver has a forward velocity of 40 m/s, what is the forward velocity after one second? What is the downward velocity after one second?

*October 12, 2015*

**math**

I am between 20 and 30. When you put me into 5 equal groups, there is an odd number in each group and one is left over. what number am I?

*October 11, 2015*

**Chem**

Depending upon the tip of a dropper pipet, there are approximately 20 drops per milliliter of water. The experimental procedure indicates the addition of 5-10 drops of each solution to the test tubes. Calculate the volume range in milliliters for the solution. Can you please ...

*October 10, 2015*

**math**

describe a real world relationship between the area of a rectangle and its width, as the width varies and the length stays the same. Sketch a graph to show this relationship.

*October 6, 2015*

**chemistry**

find the# of molecules in 5.3 moles of h20

*September 30, 2015*

**Math**

If I work 5 days a week making $8.38 an hour, how would I figure out how much I make a month, getting paid bi weekly?

*September 16, 2015*

**Tech**

Haleyy is right.

*September 15, 2015*

**Commonwealth connections academy**

Thanks Kat, Kat was right.

*September 8, 2015*

**Physics**

While John is traveling along a straight interstate highway, he notices that the mile marker reads 280. John travels until he reaches the 156-mile marker and then retraces his path to the 175-mile marker. What is John's resultant displacement from the 280-mile marker?

*September 7, 2015*

**Science**

B. An element with eight valence electrons is chemically unstable. It would be unstable only with one to seven valence electrons, not eight.

*September 7, 2015*

**Matg**

Juanita told her dad that she won 80% of the card games she played yesterday. If she won 4 games, how many games did she play?

*September 6, 2015*

**Chemistry**

Dividing 0.32g of sulfur by its density of 2.07g/cm^3 results in an answer with three significant figures? Am I right?

*September 2, 2015*

**Geometry**

Question: If a ray divides an angle into two supplementary angles, then the original angle is a straight angle. True?

*August 20, 2015*

**Geometry**

Line TV bisects <STU, m <STV = (1/4x +8), and m<UTV= (x+2( Find m<STU I get 25 but the choices are 40 10 20 30

*August 19, 2015*

**life science**

the hypothesis is the test that expired air contains carbon dioxide

*August 3, 2015*

**chemistry **

A 30.0 g sample of water at 10.0°C is mixed with 50.0 g of water at 57.0°C in a calorimeter. Calculate the final temperature of the mixture

*July 20, 2015*

**Calculus**

I'm not sure what I am doing with my life.

*July 8, 2015*

**navarro college biology**

During the sequencing of dna into a protein, what is the first step?

*June 13, 2015*

**English**

Please could you help me that I don't have run on sentences or if I need commas.After reading "Man's Nature is Good" Mencius argues that man is born good but, that life itself makes a man evil. He states "Human nature is inherently good, just like water ...

*June 3, 2015*

**Algebra**

Solve. -9(4-k)/12 = 9(k+1)/8

*June 2, 2015*

**Math**

The vertical backboard located 4ft from the baseline supports the rim of the basketball net. The backboard measures 6ft wide by 4ft high. The shooter's square is a white box above the rim of the basket. It must measure 1 1/2 ft high and 2ft wide. What is the area of the ...

*May 15, 2015*

**life orientation project**

research and briefy discuss the following processes that the community must engage whenever there is an issue before and during a protest :how to engage in a protest, protest restrictions,permit to hold a protest, activities during a protest,as well as the powers of the police...

*May 11, 2015*

**math**

If A + B + c = 180 then show that sinA + sinB + sinC=4cosA/2. cosB/2 . cosC/2

*May 8, 2015*

**General Chemistry 132**

What is your profession Dr Bob

*May 6, 2015*

**General Chemistry 132**

When solid NH4NO3 is dissolved in water at 25celcius, the temp of the solution decreases. What is true about the signs of enthalpy and entropy for this process? I understand entropy is positive, however, i do no understand why enthalpy is also positive. Can someone please ...

*May 6, 2015*

**precalculus**

hyperbola with vertices at (0,+/-2), and asymptotes y=+- 1/2x

*May 6, 2015*

**Science**

How does the sun's gravitational attraction to the earth compare to that of the moon?

*May 3, 2015*

**math:Fundamental Counting Principlal**

solve the problem by applying the fundamental counting principal with two groups of items. Shaun is joining a music club. as part of ther 4-cd introductory package she can choose from 12 rock, 10 alternative, 7 country, and 5 classical. if Shaun choose one selection from each ...

*April 30, 2015*

**math**

A baker can make a cupcake for $2.30. She would like a profit of 50 cents each. What is the percent markup on the cupcake, to the nearest tenth of a percent?

*April 28, 2015*

**math**

So do i just subtract 180-50.7?

*April 9, 2015*

**math**

2 line segments intersect to form an angle that has a measure pf 50.7 degrees. What is the measure in degrees of an angle that is supplementary to this angle. I dont understand what this question is asking me. Can someone explain it to me?

*April 9, 2015*

**Chemistry**

Use half reaction to balance: CuS + NO3^- = Cu(NO3)2 + NO2 + SO2 S^2- = SO2 S Oxidized Cu^2+ + NO3^- = NO2 + Cu(NO3)2 N Red After balancing the atoms & balancing the charges, I cannot get all the correct coefficients

*March 28, 2015*

**Physics**

You're an investigator for the National Transportation Safety Board, examining a subway accident in which a train going at 80km/h collided with a slower train traveling in the same direction at 20km/h . Your job is to determine the relative speed of the collision, to help ...

*March 25, 2015*

**1**

Because Hitler and his gang of goons took power.

*March 18, 2015*

**Math 7th grade**

Geraldo bought some computer software on layaway. He paid $12 down and must make a payment of $5 each week for 4 weeks. How much will Geraldo pay in all?

*March 16, 2015*

**Algebra 2**

Multiplying or dividing rational expressions 6x^2 + 13x - 5 divide by 6x^2 -23x + 7 Need to show my work.

*February 22, 2015*

**multivariable calculus**

show that a=!0 , the equation p=2asin0cos0 describes the sphere centered(a,0,0) at radius|a|

*February 15, 2015*

**Physics**

The mans mass would be the same as on earth so its just 560/9.8=57.14kg Second part is F=[(Gconstant)(m one)(m two)]/(radius)^2 G constant is 6.67E-11

*February 12, 2015*

**Physics**

static =velocity squared over (radius times gravity). solve for velocity and you get velocity to equal square root (radius*gravity*static)=square root of .15*.30*9.8= .664 m/s

*February 10, 2015*

**math**

its 58,000

*January 29, 2015*

**math**

i have tryed this like ten times but cant get the answer can u help. 58,00 times 7.40% after u get the answer between the two multiply by 3

*January 29, 2015*

**Language Arts**

The correct answer is decided.

*January 27, 2015*

**Math**

38 multiplied 4 equals 152 does not represent an inequality representing t - read the question again

*January 26, 2015*

**geometry**

a pentagon with a perimeter of 45 feet

*January 22, 2015*

**English**

To __________ shall I address this letter? A. whom B. who

*January 20, 2015*

**I guess this is physics related?**

Yeah I've done a project like this and we had to measure the time with a very precise instrument.

*December 29, 2014*

**I guess this is physics related?**

What is the biggest source of error in measuring the acceleration of a ball down a ramp? knowing the length of the ramp accurately measuring the time knowing the height of the ramp knowing the mass of the ball****

*December 29, 2014*

**science**

A + F = yes perhaps also "B - The orientation of the chamber" since this could change between one end of the chamber and the other? ? thoughts? orientation = up/down?

*December 13, 2014*

**science**

Yes, I think A + F could be confounding variables probably not B + D + E B does not change across the chamber D is irrelevant E is also irrelevant probably not C, this does not change across the chamber thoughts?

*December 13, 2014*

**science**

What is a confounding variable? "A confounding variable is a variable, other than the independent variable that you're interested in, that may affect the dependent variable. This can lead to erroneous conclusions about the relationship between the independent and ...

*December 13, 2014*

**science**

An experiment is set up to test whether a particular insect prefer a dark or a bright environment. A chamber with a gradient in light intensity from one end (dark) to the other (bright) has been made. The experimental hypothesis is: “There will be a large difference ...

*December 13, 2014*

**Math**

The function f given by f(x) = x^3 + 12x – 24 is? Increasing for all x's? Cause that's what I think..

*December 9, 2014*

**Chemistry**

Calculate the solubility (in g/L) of calcium fluoride in water at 25°C if the Ksp for is 1.5 × 10-10 .

*December 2, 2014*

**American National Government**

Since the 1930s, when the federal government became more involved in domestic policy functions, federalism has come to be understood as a relationship in which the states are moresubordinate to the supreme power and authority of the national government. **So would the answer ...

*December 1, 2014*

**American National Government**

Despite the greater federal authority in the federal relationship, federalism is still important for all the following reasons except that: A)it provides the best means of developing a vast country because it allows for experimentation. B)it may stimulate the interest of the ...

*December 1, 2014*

**POL 201**

Despite the greater federal authority in the federal relationship, federalism is still important for all the following reasons except that: A)it provides the best means of developing a vast country because it allows for experimentation. B)it may stimulate the interest of the ...

*December 1, 2014*

**POL 201**

Actually the correct answer is "C" it impedes the authority of the government.

*November 23, 2014*

**POL 201**

Thank you Ms. Sue

*November 23, 2014*

**POL 201**

After reading this link, would it be All basic protections were contained in the Constitution?

*November 23, 2014*

**POL 201 **

The federalists argued that a Bill of Rights was not necessary because? A. All basic protections were contained in the Constitution. B. the anti-Federalists were being irrational. C. it impedes the authority of the government. D. it would take too long to ratify.

*November 23, 2014*

**english**

3. In “The Pigman & Me,” the author creates a mood of suspense by focusing most of the action around a fight between two boys at school. a tree cut almost to its heart. Nonno Frankie’s advice to Paul. concerns about how a girl will react.

*November 17, 2014*

**language arts**

Which of these best states Nonno Frankie’s main idea of how to win a fight?

*November 17, 2014*

**physics**

what is the t shirts vertical componet of its velocity at launch? if it launches straight at 45° above the horizontal plane at 141 /s?

*November 13, 2014*