# Posts by melanie

Total # Posts: 306

**Plz help check my answer!!?**

This is Algebra 2

**Plz help check my answer!!?**

The commute times during rush hour traffic on a local interstate have a mean of 25 minutes and a standard deviation of 5 minutes. Repeated studies of this section of interstate are considered normally distributed. What percent of commuters drive between 20 - 25 minutes to work...

**Check my math question please? Very urgent!**

The commute times during rush hour traffic on a local interstate have a mean of 25 minutes and a standard deviation of 5 minutes. Repeated studies of this section of interstate are considered normally distributed. What percent of commuters drive between 20 - 25 minutes to work...

**Math-decimals **

Is 20 times 5/6 greater or less than 20?

**Science**

Literally, I see u on EVERY SINGLE THREAD! xD and thank you so much, Ms. Sue! <3

**Science**

Also, Ms. Sue, Are u famous on Jiskha?

**Science**

Why do Oil & Water not mix? I'm so confused (This is just something I wanna know, no multiple choice) also, Ms. Sue, If you see this, Hi

**Math**

A waitress Nikia makes three dollars per hour +8 dollars in tips she goes to earn no less than $26 today what is the algebra equation for that

**Chemistry**

Determine the volume of a 0.1 M solution of HCl, necessary to titrate 20 mL of a 0.5 M solution of NH3. The value of Kb is 1.8 x 10-5.

**Chemistry**

Determine the variation of the buffer of the problem 1, if 200 mL of the buffer is added 10 mL of a 1.0 M solution of HCl.

**Chemistry**

Calculate the pH of a buffer made of a 0.4 M of acetic acid and 0.5M of sodium acetate. The Ka for the acetic acid is 1.8 x 10-5.

**MATH**

6 divided by 2 is 3, 3 times 1 plus 2 (3) equals 9.

**math**

rearrange A = 2 pi r (r+h) to make h the subject (cylinder)

**math**

2x^2 - 5 y = _______ 3x^2 - 4

**Math**

What is 5/12 divided by 3/4

**English, Language Arts**

I didn't take it I don't want to cheat just want to know what questions are wrong I don't need the right answer just if what I have is wrong or right

**English, Language Arts**

I know everyone has not read all of these but I would like help with the ones that do not have to do with a story if some one could please help me.

**English, Language Arts**

Please check my answers 1. In the play Crossroads: A Sad Vaudeville, the use of stage directions better helps the reader to observe the movements of a character. envision inside the mind of a character. understand how a character responds to a certain situation. all of the ...

**Jar Marbles**

A jar contains 5 red marbles, numbered 1 to 5, and 12 blue marbles numbered 1 to 12. a) A marble is chosen at random. If you're told the marble is red, what is the probability that it has the number 3 on it? b) The first marble is replaced, and another marble is chosen at ...

**math**

MR Zheng sold a total of 576 muffins and cookies the ratio of the number of muffins sold to the number of muffin sold to the number of cookies sold was 4:5> how many muffin were sold and how many more cookies that muffins were sold

**math**

A box filled with 38 identical balls had a mass of 2.13kg.When 26 balls were removed,the total mass of box and the remaining balls was 0.96 kg.Find the mass of the box when it was empty

**Chemistry**

At normal temperature and pressure, air has a density of 0.001184 g/mL. What is the mass of air in a room that is 3.93 m by 2.28 m by 2.25 m?

**Chemistry**

A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calculate the mass of pure acetic acid in 460 mL of this solution at 20 C. Answer in units of g.

**Chemistry**

Alright thank you so much for your help! I really appreciate it.

**Chemistry**

The standard disposable propane cylinders for use with camp stoves, lanterns, portable barbecues, etc, contain 355 g of propane. Calculate the total energy available from one of these cylinders.

**Intro to computers 1**

Which logging category does not appear in Event Viewer by default? A. Application B. System C. Volume D. Security

**Anatomy**

9.9 L/min

**math**

x = 90.1?

**math**

There is a diagram of a running track. The track is made up of two straights and two semicircles. The radius of each semicircle is 35 meters. The length of the outer perimeter of the entire running track is 400 meters. Find the length of one of the straight sections of the ...

**Math**

5 multiple choice and 6 short responses

**chemistry**

Now I am a little bit puzzled.If the electronic structure of Fe is Ar 3d^6 4s^2 ,then what i can infer is that i would use 4,but the accurate number would be 3,plz make yourself clear.

**chemistry**

How can i be accurate when assigning oxidation numbers? By this i refer to elements that have more than 1 oxidation # . For example: I have been working with hydrides and i had this reaction in mind: Nb + H Shoud i use 3 or 5 for Nb, why?

**SCIENCE**

Which of the following gases occupy the smallest volume at STP? a 4.032 g H2 b 1.000 mol of carbon dioxide c 6.022 × 1023 molecules of O2 d 35.45 g Cl2

**math**

A box filled with 38 identical balls had a mass of 2.13kg.When 26 balls were removed, the total mass of the box and remaining balls was 0.96 Find the mass of the box when it was empty

**Math**

At the grocery store Mr and Mrs Bailey bought 24 apples and 18 pears. Write a ratio in simplest form to compare apples to pears

**Spanish**

Your answers are accurate , congrats on your excellent Spanish! !

**Chemistry**

Number of Moles of AgNO3 when 0.25 grams of NaCl react with AgNO3

**sociel studies**

how did most people in the middle colonies make a living

**History Check My Answer!**

Is it B?? That was my second answer.

**History Check My Answer!**

Hey I just have 1 question. What event caused four additional Southern states to secede from the Union? The U.S. accepted West Virginia as a state. The South fired on Fort Sumter. Lincoln declared the Emancipation Proclamation. ****** Lincoln raised an army.

**Geometry**

omg... this doesn't answer any of ur questions but I find it funny that this was posted tomorrow of LAST YEAR, and I'm finding it a year later, the day before it was posted... O.o

**Physics**

Josie and Charlotte push a 14-kg bag of playground sand for a sandbox on a frictionless, horizontal, wet polyvinyl surface with a constant, horizontal force for a distance of 8 m, starting from rest. If the final speed of the sand bag is 0.15 m/s, what is the magnitude of the ...

**Physics**

It takes 170 kJ of work to accelerate a car from 21.5 m/s to 27.0 m/s. What is the car's mass?

**chemistry**

Propane is used in BBQs and burns according to the following equation: C3H8 + 5O2 -> 3CO2 + 4H2O. If 2.2 moles of carbon dioxide are produced, how many moles of oxygen gas reacted?

**Physics**

What is the average linear speed of Mercury about the Sun? (The distance from the Sun to Mercury is 5.80 1010 meters. The orbital period around the Sun is 88 days.)

**Math**

1? I'm confused

**Math**

1. Doug earns $10.50 per hour working at a restaurant.on Friday, he spent 1 3/4 hours cleaning, 2 1/3 hours doing paperwork, and one and 1 5/12hour serving customers.what were doughs earnings?

**Math**

21. Miss Donaldson as $18.80 per hour for the first 40 hours she works in the week. She Earns 1 1/2Times that amount per hour for each hour beyond 40 hours in a week. , Miss Donaldsonwhere 45.5 hours. How much money did she earn? A. A health insurance payment of $34.55 was ...

**Math**

Continuation... Round your answer to the nearest 10th of a second

**Math**

1. Doug earns $10.50 per hour at a restaurant. On Friday, he's been 1 3/4 hours cleaning, 2 1/3 hours doing paperwork, and one 512 hours serving customers . What were dougs earning? 6. Salid bought 35 feet of window trim at a hardware store. The trim it cost $1.75 per foot...

**Physics**

On earth, two parts of a space probe weigh 14500 N and 6400 N. These parts are separated by a center-to-center distance of 19 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the other out in space, far ...

**Physics**

A car travels at a constant speed around a circular track whose radius is 2.8 km. The car goes once around the track in 430 s. What is the magnitude of the centripetal acceleration of the car?

**Physics**

A wheel is rotating at a rate of 2.5 revolutions every 3.6 s. Through what angle, in radians, does the wheel rotate in 1.0 s?

**Science**

DNA

**Science**

Gene

**Math**

The tournament starts with 64 teams playing 32 games and continue until there is only one team left. Come up with a formula for how many teams are left after x rounds. Ok so far I have y= 64-x-32 However, I know that won't work. I'm just not really sure what to do with...

**chemistry**

C3H6O + 4O2 --> 3CO2(g) + 3H2O(g) deltaH= -1790kJ the density of C3H6O is 0.79g/mL. HOw much heat is released by the combustion of 150mL of acetone?

**health**

What causes depression? A. Environmental issues B. There is no known cause C. Biochemical issues D. Genetic issues ithink it D?!!

**health**

________ may likely lead to aggressive behavior. A. All of the above B. Complacency C. Sadness D. Irritability think it d ????!!!

**physics101 please**

a 12,000 kg truck is moving right at 22 m/s collides with and sticks to a 1200 kg car moving to the right at 16 m/s. With what speed do the two vehicles move after the collision and in what direction?

**physics101 please**

a 1500 kg car is driven around a circle of radius 120 m and at a speed of 26 m/s. calculate the magnitude of the centripetal force of the car. What real force keeps the car moving in a circle? the answer is not one of the four fundamental forces, but way one of those forces ...

**physics**

a motorcycle initially moving at +32 m/s accelerates at -4.0 m/s for 3.0s. a car initially at rest accelerates at 4.0 m/s for 5.25 s. a) Which vehicle will be going faster at the end of each given time, and how much faster? b) how far does each vehicle travel during their ...

**Math**

A sc tourists bureau survey showed that 75 % of those who seek information about the state actually come to visit . The office received 8 requests for information. What is the probability that probability that 4 to 6 inclusive of the people will visit sc?

**math**

A shopper uses a department store gift card to pay for 3 sweaters priced at $27 each. What integer can be used to show the amount of change?

**Chemistry**

Nevermind I got it.

**Chemistry**

What is the concentration when each of the following is dissolved in 1.50 L of water: a) 3.00 moles of NaCl b) 10 g of KCl c) 110 mg of NaCO3

**physics**

a car moving at 6m/s accelerate at 1.5meter squared per second for 4seconds.It then it slows down at rate 1.2 meter squared per second. What is the distance travel?

**Physics**

A photon having wavelength λ scatters off a free electron at A (see figure below), producing a second photon having wavelength λ'. This photon then scatters off another free electron at B, producing a third photon having wavelength λ'' and moving in ...

**Math**

Determine the simple interest p=6742.75,6.05%, t=90 days

**Chemistry**

1. How many moles of ammonia NH3 are produced when 0.45 moles of nitrogen N2 reacts? N2 + 3H2 yields 2NH3 2. How many mililiters of water will be produced when 2.05 g of hydrogen reacts? The density of water is 1.00 g/mL ? 2H2 + O2 yields 2H2O 3. What is the limiting reactant ...

**Language Arts**

its C

**math**

Rick has a collection of 6 video games. He lets his best friend borrow: of his video game collection. Write two equivalent to this number Explain how you came fractions up with the fractions.

**math**

Adam wants to compare the fractions 129 6 and 1. He wants to order them from least to greatest and rewrite them so they all have the same denominator. Explain how Adam can rewrite the fractions.

**Language arts**

vwala

**Language arts**

#1. In the multi draft reading process, what does a reader look for in the second reading of a drama? Answer: How each scene moves the story forward. #2. When and where does the action in the play (Looking Up) take place? Answer: In the backyard at night. #3. Which line of ...

**Language arts**

Each of us may have take the same test but that doesn't mean we all took it in the same order

**Language arts**

Its possible that each one of the answers in the different questions was put into a different order, meaning that both B and C or even D and A could have been right.

**Language arts**

Jeez everyone calm down!!!

**business math**

A local Barnes and Noble paid a $79.44 net price for each calculus textbook. The publisher offered a 20% trade discount. What was the publisher’s list price?

**Grade 9 French**

I need help I'm trying to find a rap to help me with the present and irregular verbs

**health**

three information technology applications--clinical decision support systems--as components of QI management.

**English**

no its not A. I got it wrong.

**Geometry**

Given that R is between S and T, find each missing measure. RS=6, TR=4.5, TS=?

**math**

The least common multiple of two numbers is 60 and one of the other number is 7 less than the other number what are the numbers justify your answer

**History**

Ok the question was, what evidence in the declaration is there of religious faith? I put, "We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty, ...

**History**

thanks.

**History**

So for my homework question it asks what reference do you see to Native Americans in the Declaration of Independence? I put: "He has excited domestic insurrections amongst us, and has endeavored to bring on the inhabitants of our frontiers, the merciless Indian Savages, ...

**History**

Question about Puritans behavior in Massachusetts? I was given a picture that wont let me post on here. The top picture has a cowboy boot and a book, and the second picture has a more feminine boot, with dice, a cup, etc. And have to answer: What does the labeling in the two ...

**Algebra**

nvm its a

**Algebra**

Myra uses an inverse variation function to model the data for the ordered pairs below. (2, 30), (3, 20), (4, 15), (5, 12), (6, 10) Which statement best explains whether an inverse variation function is the best model for the data? An inverse function is the best model because ...

**Algebra**

Jordan uses a linear equation to model the data in a table. Which reasoning might Jordan have used in the decision to model the data with a linear equation? The products of corresponding x- and y-values are equal. The ratios of consecutive y-values are equal for evenly spaced ...

**trig**

earth is 149 600 000 km from the sun. this distance is equal to 1 A.U (astronomical unit). Mars is seen form earth to make an angle of 68degrees with the sun. a) draw a diagram and label b)how far are earth and mars c) do you think the distance between earth and mars are the ...

**Math**

i don't know

**Physics**

A sound wave in a solid has a frequency of 15.0 kHz and a wavelength of 0.333 m. What would be the wave speed, and how much faster is this speed than the speed of sound in air?

**math**

on a boat tour there are half as many children there are as adults. ther are 40 people on the tour how many children are there

**Math**

Write an equation of a line that is parallel to the line y-3=2(x+5) and goes through the point (5,7)

**Math**

Three minutes after take-off, and airplane is 5,000 feet in the air. If it ascends at a constant rate, what is the rate of change? Please help.

**Math**

In 3 minutes I can type 192 words. and in 5 minutes I can type 311 minutes. Find how many words I can type per minute. Help please.

**Math**

Solve each system using the method of your choice. 1. 7x+2y=17 2. 6x-5y=-9 3. y=4x-8 4. y=2x+10 5. 3x-6y=30 6. y=-6x+34 7. 3x+y=5 8. 15x+5y=2 9. 2m=-4n-4 10. 3m+5n=-3 11. 5x+y=0 12. 5x+2y=30 Thank you. (:

**Science**

For discussion assignments I prefer to come here for examples.