Sunday
September 25, 2016

Posts by Lauren

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

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