Sunday

September 25, 2016
Total # Posts: 1,779

**Chemistry **

Given a 800 mg sample of Thorium-231 decomposes via beta emission with a half life of 25.5 hours, how long would it take, in days, for the sample to decay down to 25 mg? 231 0 231 Th -> Beta + Pa 90 -1 91 800 mg/ 25 mg

*September 23, 2016*

**precalc**

A Norman window has the shape of a square with a semicircle mounted on it. Find the width of the window if the total area of the square and the semicircle is to be 240 ft squared

*September 13, 2016*

**Physics **

A baseball is his so that a travel straight upward after being struck by the bat. A fat observes that it takes three seconds for the ball to reach its maximum height. Find the balls initial velocity and the height it reaches. my professor showed a similar problem to this but ...

*September 9, 2016*

**math**

John can cut the grass in 4 hours working by himself. When john cuts the grass with his younger brother michael, it takes 3 hours. How long would it take michael to cut the grass by himself?

*July 21, 2016*

**math**

I think so , i was pretty distressed regarding this matter,thank you for helping me.

*July 12, 2016*

**math**

i took algebra 2,but i don't know why my teacher didn't bother to teach me this topic

*July 12, 2016*

**math **

Are trigonometric functions taught in 11th grade, if so ,is it wrong that i wasn't tought that topic in 11th grade????plz help!!!!

*July 12, 2016*

**Maths**

Steve - you answered this question earlier for someone else and gave them the formula for how to answer it. I have the same problem in my homework and have used the formula you gave, but have got an answer that does not appear in the answer options. I got 12.75 Would you be ...

*July 8, 2016*

**Maths**

Steve - you answered this question earlier for someone else and gave them the formula for how to answer it. I have the same problem in my homework and have used the formula you gave, but have got an answer that does not appear in the answer options. I got 12.75 Would you be ...

*July 7, 2016*

**Science**

sodium can be extracted by heating naturally occuring salt until it is molten. an electrochemical process is then used to extract the sodium. cl2 is produces at the anode and Na is collected at the cathode. write the half-reactions that occur at the anode and the cathode. ...

*July 7, 2016*

**Maths**

*u not i

*July 7, 2016*

**Maths**

In3/In1.09=12.75 should I choose answer 12.2?

*July 7, 2016*

**english**

how do put an author of a research article and where they are from in apa format example author: Daniel S. Budnitz, M.D., M.P.H.

*June 27, 2016*

**math**

thanks!!!!

*June 23, 2016*

**math **

when dealing with sigma notation, if i enclose my formula with parenthesis,does it make it different from a formula with no parenthesis? plz help, I saw this in regents prep webpage and I just didn't see any difference, but they say that the parenthesis changes the result.

*June 23, 2016*

**history**

Andrew Jackson in 1828 & 1832: a) what policies or actions were not good b) what policies or actions were good

*June 22, 2016*

**English**

I was assigned to write an essay,after writing it ,I started to question my writing, and I just cannot decide on whether I should use passive or active voice for this kind of formal writing. ..yes,I have researched, but can't establish which one is more adequate.

*June 17, 2016*

**Chemistry**

the question says: Calculate the mass of soap (NaC17H35COO) which contains 1.25 grams of Carbon. Do I use the percentage composition of soap and the mole?

*June 14, 2016*

**history**

compare & contrast the accomplishments, shortcomings of the first four presidents: Washington, Adams, Jefferson, Madison thank you

*June 14, 2016*

**Math**

A cone-shaped pile of sawdust has a base diameter of 40 feet, and is 15 feet tall. Find the volume of the sawdust pile. Round your answer to the nearest hundredth if necessary. Use 3.14

*June 8, 2016*

**math**

Tory and Emilio's motorboats travel at the same speed. Tory pilots her boat 40 km before docking. Emilio continues for another 4 hr, traveling a total of 90 km before docking. How long did it take Tory to navigate the 40 km?

*May 10, 2016*

**Math**

An suv drove 54 miles using 3 gallons of gas at this rate how far could it drive with 5 gallons of gas?

*May 8, 2016*

**Chemistry**

A sample of 20.0 g of chlorine gas at 15 degrees Celsius occupies a volume of 5.0 L. What is the pressure of the gas?

*May 7, 2016*

**Chemistry**

What volume of oxygen gas is needed for the complete combustion of 4.00 L of ethane gas, C2H6? Assume that the temperature and pressure of the reactants are the same.

*May 7, 2016*

**math**

The current in a stream moves at a speed of 4 mph. A boat travels 24 mi upstream and 24 mi downstream in a total time of 14 hrs. What is the speed of the boat in still water?

*May 3, 2016*

**LA, Check!**

Okay, thank you!

*April 28, 2016*

**Help! LA!**

Hello? Ms. Sue? Are you going to not answer me? Just, please? Someone help me, it will make a world of difference for me!

*April 28, 2016*

**LA, Check!**

Is it A?

*April 28, 2016*

**LA, Check!**

Read the statements Which group is contrasting in point of view? A. "Some people feel that there is lots of wild space that animals should only live there. Other people feel that there is very little wild space left." B. "Humans are destroying the Earth's ...

*April 28, 2016*

**Math**

A quiz contains three True/False questions. If a student attempts to answer the questions by guessing, what is the probability that the student will answer all three questions correctly ?

*April 25, 2016*

**english**

what role did religion play in "Mr Pirzada Came to Dine" and "My Two Lives" by Jhumpa Lahiri thank you

*April 25, 2016*

**math**

what is the third term necessary to make this a perfect square trinomial? what is the binomial quantity squared it is equivalent to? x^2 - 9x _______= (________)^2 x^2 + 10x _______= (________)^2

*April 21, 2016*

**Math**

3729tan(7) = 457.8 so the answer would be A, 458 meters.

*April 19, 2016*

**social studies { somebody please help me please**

1. D 2. B 3. C

*April 7, 2016*

**Math**

Her has $1500 in a retirement account earning 5% interest compounded annually. Each year after the first, she makes and additional deposits of $1500. After 5 years , what was her account balance if she did not make any withdrawals?

*April 6, 2016*

**Math**

Range invested $1000 for college in an account earning 5% simple interest. When she withdrew the investment , she had earned a total of $550 in interest. How long was the money invested. How long was the money invested? I did 1000(.05) (t) - whatever she withdrew She earned a ...

*April 6, 2016*

**math**

yea im supposed to subtract them. all the directions say is to subtract.

*March 31, 2016*

**math**

how do i solve 3√8x^2y^3 - 5x√32y^3 or 4√98y^11 - 9√128y^11

*March 31, 2016*

**MAth**

Your lawnmower uses a gasoline and oil mixture for fuel. For every 2 gallons of gas you add 18 ounces of oil how much oil should you add for 5 gallons of gasoline?

*March 6, 2016*

**Maths literacy ,life science,history,geography**

Which university or college take the subjects that iam doing

*March 4, 2016*

**math**

Where did you get the 60 from?

*March 3, 2016*

**math**

one estimate for the ideal body weight of a woman is shown below. use this information to answer part (a) through (d) 55kg+1.5kg for each inch over 5 feet (a) find a linear model for an estimate of the ideal weight of a woman using W for ideal body weight (in Kg) and H for ...

*March 3, 2016*

**English**

Just did this assignment. All the answers are correct

*February 28, 2016*

**physics**

A 35 micro coulomb point charge is placed 32 cm from an identical 35 micro coulomb charge. How much work would be required to move a 0.50 micro coulomb test charge from a point midway between them to a point 12 cm closer to either of the charges? i got an answer of -2.954 J ...

*February 11, 2016*

**maths**

10,000 revolutions, I hope that helped :)

*February 6, 2016*

**Physics**

So for A is the answer just G?? For d is the answer -3/4mg

*February 6, 2016*

**Physics**

A body of mass m falls from rest through the air. A drag force D = bv^2 opposes the the motion of the body. The acceleration due to gravity is g. A) What is the initial downward acceleration of the body? B) After some time the speed of the body approaches a constant value. ...

*February 6, 2016*

**Algebra **

If I Have 27 Questions And I Have 22 Correct What Did I Get On My Test The Percentage ?

*February 3, 2016*

**Math**

A $15 item on sale for $12 is marked down what percent? 100 * $12 = $1200 $1200/$15 = $6000 Did I do the correct work, or is it this: 100 * $3 = $300 $300/$15 = $4500 Is the first work correct or is the second work correct?

*January 28, 2016*

**physics**

When driving west toward the Rocky Mountains, you see a peak 2.6 ∘ above the horizon. Your GPS gives your current elevation as 1490 m , and according to the map, you're 25.0 km (horizontally) from the peak. Find the peak's elevation. I thought it would be 1490+...

*January 27, 2016*

**math**

it comes out to be 655.4 so would it just be a 65.54?

*January 24, 2016*

**math**

if the lecture grade is the mastering points worth 20% and exams worth 80%. what is the lecture grade? mastering points: 1513 exam grades: 92,83,76,95,95 thank you!

*January 24, 2016*

**Math**

For question 3-4, use your calculator to create a scatter plot and line of best fit for the following set of data: Average height of a species of tree (in feet) after a certain number of years. Years:1/2/3/4/5/6/7/8 Height:2.1/3.2/6.8/7.3/11.2/12.6/13.4/15.9 3.What is the ...

*January 14, 2016*

**math**

Can somebody please help me with this? Everyday for a week, he counts how many times each player can leg press 350 pounds. The following week, he has each player sprint 40 yards every day. The table shows the average number of leg-press reps and the average 40-yard dash time (...

*January 5, 2016*

**Math**

Erica knits 18 squares on Monday. She knits 7 more squares each day for the rest of the week. How many squares does Erica have on Friday?

*December 10, 2015*

**algebra**

a water rocket is launched with an initial velocity of 112ft/sec. its height h, in feet T seconds is given by the formula h=112T-16T^2. when will the rocket be exactly 192 ft above the ground? the rocket first reaches a height of 192ft after _____ and reaches 192ft a second ...

*December 5, 2015*

**Algebra 1**

given the scatterplot below,which of the following equations would best model the date?explain your choice.(1)y=-3x+6 (2)y=6(2)x (3)y=-4xsquared+20x+3 (4)y=2xsquared-6x+4

*December 3, 2015*

**government**

how can the community reduce discrimination? how can we use the arts to reduce discrimination? thank you!

*November 30, 2015*

**Math**

Find the value of x so that the line through (-4,-5) and (3,3) is perpendicular to the line through (-4,4) and (x,-5).

*November 30, 2015*

**7th Grade Proportion Help**

Thanks this helped a lot.

*November 19, 2015*

**Social Studies**

What role did freed slaves play in Shermans capture of Atlanta?

*November 18, 2015*

**Social Studies**

was it General Ulysses S. Grant?

*November 17, 2015*

**Social Studies**

who was the general of the union forces

*November 17, 2015*

**Social Studies**

who was the commander of the forces that fired the first shot of the civil war

*November 16, 2015*

**Social Studies**

what contribution did henry clay make to the issue of slavery

*November 12, 2015*

**Social Studies**

What present day states belonged to Mexico in 1820?

*November 11, 2015*

**math**

you would do 27 times 11

*October 26, 2015*

**math**

it doesnt say, but I over- looked it and its a two part answer the first question says: We traveled 135 miles to the lake on 5 gallons of gas. we had to figure out the unit rate which was 27 miles per one gallon.

*October 26, 2015*

**math**

What distance did the car travel if we used 11 gallons of gas to travel the mountains? use a tape diagram to show how you found the miles traveled. I dont know how to solve this question

*October 26, 2015*

**Math**

not google but bing, thank you

*October 22, 2015*

**Math**

I am writing a single paragraph of the Pythagorean Theorem and was wondering if someone could help me out with this, So far I have The Pythagorean Theorem is a very important term used for right triangles. I need help, at least a website or something. Thank you

*October 22, 2015*

**english**

which one of these topics would be good for a rhetorical analysis paper? - Governess contribution to The Upper Class in 19th Century England and Jane Eyre - Puritan and Cavalier poets -The Psychology of the Cult Experience. by glenn collins -Beowulf vs. Sir Gawain thank you!

*October 20, 2015*

**calculus**

solve the differential equation that satisfies the given condition: dy/dx=(ycos(x))/(6+y^2), y(0)=1

*October 17, 2015*

**cultural diversity**

Using the “think-pair-share” structure is a great strategy to reach students with which learning style? A. Visual/Verbal B. Active/Reflective C. Sensory/Intuitive D. Sequential/Global I think C

*October 15, 2015*

**cultural diversity**

What is the normal brain process which can result in poorly developed neural networks when infants experience chronic understimulation in the earliest years? A. Synaptic pruning B. Seeding C. Expansion D. Collateral development I think A

*October 15, 2015*

**cultural diversity**

Which is NOT a strategy that can be implemented by a teacher to understand a family’s goals for his or her child’s linguistic development? A. The teacher can create a parent survey. B. The teacher can assume each family has the same goal for their child to learn ...

*October 14, 2015*

**social studies**

thank you so much, I found it and it was B thank you for your help and not giving the exact answer.

*October 13, 2015*

**social studies**

Which of the following statements does not describe a function of the confederation government? A. defend the country B. regulate trade between states C. maintain relationships with other countries D. set up a postal service between states I just need help please I think it ...

*October 13, 2015*

**marh**

It would have to be forty four.

*October 13, 2015*

**Math**

A donut shop charges $.70 for each donut and $.30 for a carry out box. Shirley has five dollars to spend. At most how many donuts can she buy if she also wants them in a carry-out box?

*October 7, 2015*

**chemistry**

How many moles of platinum would be in 10.0 g of this metal?

*October 7, 2015*

**chemistry**

What is the molecular weight and formula for petroleum ether?

*September 29, 2015*

**algebra**

a car travels at 53 miles per hour for 2.5 hours. how far will it travel? thank you

*September 20, 2015*

**Math**

(x+1)(x−2)(x−4)≤0 A) (−1, 2) ∪ (4, ∞) B) (−∞, −1] ∪ [2, 4] C) [−1, 2] ∪ [4, ∞) D) (−∞, −1) ∪ (2, 4) im confused on which to chose ( or ]

*September 20, 2015*

**Algebra**

sqrt(9x^2) = sqrt(9) * sqrt(x^2) = 3 * x = 3x

*September 20, 2015*

**algebra**

a 25 foot wire is to be cut so that the longer piece is one foot longer than 5 times the shorter. find the length of each piece thank you!

*September 17, 2015*

**chemistry**

Gaseous butane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 29.1 g of butane is mixed with 64. g of oxygen. Calculate the minimum mass of butane that could be left over by the chemical reaction. Be sure your answer has the ...

*September 16, 2015*

**phsyics**

A kicked football leaves the ground at an angle with a velocity of 20.0 m/s as shown in the figure. Suppose the kick is attempted 36.0 m from the goalposts, whose crossbar is 3.05 m above the ground. angle 37

*September 13, 2015*

**Math**

A rope is 60 in. in length and must be cut into two pieces. If one piece must be five times as long as the other, find the length of each piece. Is one part of the rope 5in?

*September 11, 2015*

**Math**

A chemist wants to create a solution that is 24% acid. How many liters of 40% acid solution must be added to 50 liters of an 18% acid solution to obtain this 24% acid mixture? Please help thank you

*September 9, 2015*

**math**

The sum of a number divided by 5 and 7 is 2. i need help writing this as an equation thank you

*September 1, 2015*

**pe 8**

the answer was a) physical health

*August 25, 2015*

**pe 8**

ok, thank you

*August 25, 2015*

**pe 8**

it has physical and social health on the sides and mental and emotional on the bottom

*August 25, 2015*

**pe 8**

1. Which side of the health triangle corresponds to getting enough rest? a) physical health b) social health c) mental and emotional health*** d) none of the above Am I right?

*August 25, 2015*

**English **

PLEASE HELP!! I NEED TO TURN IT IN AS SOON AS POSSIBLE!! THANK YOU!! Question 1: Day: Monday To: Nominees From: Your Principal Concerning: Rules of Election 1. Everyone running for office must prepare a 3-minute speech that will be recorded for presentation to the entire ...

*August 16, 2015*

**speech**

i need an example on " You will choose an aspect of your life/personality to highlight and speak about to give your audience a better idea of who you are. Your goal is not to reveal as much information as possible to your audience, your goal is to let some aspect of your ...

*August 15, 2015*

**Math**

The base of a 6-inch long ice cream cone with a diameter of 2 inches, is cut 0.25 inches from the base. This cut creates two shapes, one is a cone, and the other one resembles a cylinder since it was cut so close to the base. What is the BEST estimate for the volume of the ...

*August 10, 2015*

**Math **

Find the point, M, that divides segment AB into a ratio of 4:7 if A is at (-33, 0) and B is at (0, 44). A)(-22, 15) B) (-22, 16) C) (-21, 15) D) (-21, 16) Is it A?

*August 10, 2015*

**Math**

Is the answer 64?

*August 4, 2015*