Wednesday
March 29, 2017

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Posts by Lauren

Total # Posts: 1,818

history
The 60's were a tumultuous decade: which event(s). legislation, etc. do you feel has impacted or changed history the most? thank you
March 1, 2017

Chemistry
When 0.010 moles of Zn(s) reacts with 30.0 mL of 1.0 M HCl, the H2 gas produced is collected in a 1.0 L flask at a temperature of 270 K. What is the pressure (atm) of H2 gas collected? Zn(s) + 2HCl(aq) à\longrightarrow ZnCl2(aq) + H2(g)
March 1, 2017

Math
1 pt) Consider the function f(x), for which f(0)=4 and f?(0)=?6. Find h?(0) for the function h(x)=1/f(x). h?(0) =
February 27, 2017

Math
One hour after x milligrams of a drug are given to a person, the change in body temperature T(x) (in degrees fahrenheit) is given by the function T(x)=x^2(1−x/3). Further, the rate T′(x) at which T changes with respect to the size of the ...
February 27, 2017

Math
f(x)=x^9h(x) h(−1)=5 h′(−1)=8 Calculate f′(−1).
February 27, 2017

Math
Suppose that f(x)=6x^−4+9x^−2. Evaluate each of the following: f'(3)= f'(-1)
February 27, 2017

Math
For what values of x is the tangent line of the graph of f(x)=2x^3?12x^2+19x+0 parallel to the line y=1x+0.7 ? Enter the x values in order, smallest first, to 4 places of accuracy:
February 27, 2017

Calcalus
A population P is a function of time t that had 5000 when t=0 can be written P(t)= 5000+B(t)-D(t). B(t) is the number of births since t=0 and D(t0 is the number of deaths since t=0. suppose at a given instant B=800 and dB/dt=100, and D=1000 and dD/dt=85. What is P? What is dP/dt?
February 23, 2017

history
i was needing help on picking the answer out of those 5
February 21, 2017

history
For a registered political party in a statewide election to gain ballot access, it must do the following except.. - obtain 5 percent of the vote in any statewide election. - voters cannot sign multiple petitions. - collect petition signatures equal to 1 percent of the total ...
February 21, 2017

Chemistry
How many grams of K2SO3 would be required to react completely with 200.0 mL of 0.245 M HCl
February 20, 2017

organic chemistry
The constants for Antoine’s equation for TCE (based on log10 and o C) are: A= 6.5183, B = 1018.6 and C = 192.7. If a container (negligible volume) is placed in a sealed room 1000 m3 at 30 oC, how many grams of TCE will evaporate upon reaching equilibrium with the liquid ...
January 29, 2017

Math - Algebra 1
A field must be fenced in. There is 212 yards of fencing material to be used. What should the dimensions of the enclosed area be to ensure that is has the largest area possible? (system of equations) Dimensions_____________________
January 24, 2017

Math - Algebra 1
Each cow eats 4.5 cups of feed a day and the bucket it comes in contains 250 cups. The buckets cost $26.75 each. If a farm has 16 cows, how much will it cost to feed all of the cows for 1 week? (system of equations) Cost____________________
January 24, 2017

Math - Algebra 1
A field must be fenced in. There is 212 yards of fencing material to be used. What should the dimensions of the enclosed area be to ensure that is has the largest area possible? Dimensions_____________________
January 24, 2017

calculus
use implicit differentiation to show: d/dx(tan^-1x)=1/(x^2+1)
December 16, 2016

Stats -Math
1. We are interested in conducting a study in order to determine what percentage of voters of a state would vote for the incumbent governor. What is the minimum size sample needed to estimate the population proportion with a margin of error of 0.05 or less at 95% confidence? ...
December 12, 2016

math
Yes, the slope of both lines is 0.5, which means the lines really are parallel. They never intersect, so there is no point that lies on both lines, and no solution to the system.
December 12, 2016

Physics
A tennis ball is served from the back line of the court such that it leaves the racket 2.4 m above the ground in a horizontal direction at a speed of 22.3 m/s. (a) will the ball cross a 0.91-m-high net in front of the server? Will the ball land in the service court, which is ...
December 1, 2016

texas history
i need help on figuring out a topic "The topic of your report must be an issue that is being addressed by both the state and federal government"
November 23, 2016

Physics
Thank you so much!
November 16, 2016

Physics
N be going up on the knife edge with the 0.200 kg mass.
November 16, 2016

Physics
Would the magnitude of N also be 3.72 N?
November 16, 2016

Physics
A meter stick whose mass is 0.200 kg is supported at the zero cm mark by a knife edge and a force F at the 100 cm point. A mass of 700 grams is attached to the stick at 40 cm mark. Find the magnitude of N and F in Newton's.
November 16, 2016

Math/algebra
Thank you for helping me Ms.Sue^.^ ?^?
November 16, 2016

Math/algebra
Sandy drives the first 3 hours of her trip at 65 miles per hour. The last hour of the trip she drives 62 miles per hour. How far did Sandy drive on her trip?
November 16, 2016

science
What is the volume of chlorine that is used to produce 292 grams of hydrogen chloride?
November 8, 2016

maths
Calculate the lengths of the straight lines joining the following pairs of points, leaving your answers in surd form: (a) A(4,-3), B(7,6).
November 1, 2016

maths
The points A(1,5) and B(9,3) are part of a triangle ΔABC. The triangle has a right angle at A and and sides satisfy AB=2AC. Find a point C such that C lies above the line AB.
October 31, 2016

maths
Consider the 4 points A(1,5), B(-4,6), C(0,0), D(-12,12). Find the gradients of the lines: (a) AB; (b) CD; (c) BD.
October 31, 2016

Maths
By making the substitution u =ln x show that the following equation has exactly one real-number solution: 9/ln x + ln x^4 =-12 Sorry wrote the incorrect equation previously!
October 27, 2016

Maths
By making the substitution u =ln x show that the following equation has exactly one real-number solution: 9/ln x + ln x^4 =-12 Sorry wrote the incorrect equation previously!
October 27, 2016

Maths
By making the substitution u =ln x show that the following equation has exactly one real-number solution: -12/ln x +ln x^4 = -9
October 27, 2016

Maths
By making the substitution u=7^x and using part a, derive a hidden quadratic equation 7^(2x-1) +4×7^(x-1) -1/14 =0 and hence find all of the solutions to the above equation.
October 27, 2016

maths
By making the substitution u =ln x show that the following equation has exactly one real-number solution: -12/ln x +ln x^4 = -9
October 26, 2016

maths
By making the substitution u=7^x and using part a, derive a hidden quadratic equation 7^(2x-1) +4×7^(x-1) -1/14 =0 and hence find all of the solutions to the above equation.
October 26, 2016

Maths
Let u=7^x. Using the rules for powers show that i) 7^x-1 = u÷7 and ii) 7^2x-1 = u^2÷7
October 26, 2016

Algebra 1
So how do I write it in step by step form, for an essay?
October 25, 2016

Algebra 1
Is that the answer? 2 x (2 x^2 + x + 1)? Or do I need to factor it, like it says?
October 25, 2016

Algebra 1
f (x) = 9x^3 + 2x^2 - 5x + 4 and g(x) = 5x^3 - 7x + 4. What is f (x) - g(x)? Show all your stes and write your final answer in factored form. I am really stumped on this, could someone help me?
October 25, 2016

chemistry
Why do some reactions go to completion while others reach a state of equilibrium?
October 24, 2016

Chemistry
Determine the mass of urea, CH2N2O, required to make 250mL of a 0.235 M solution
October 20, 2016

Math
1) A television tower is 160 feet high and an observer is 120 feet from the base of the tower. Find, to the nearest degree, the angle of elevation of the top of the tower from the point of observation. 2) A vertical pole 22 meters tall casts a shadow 16 meters long on level ...
October 13, 2016

Chemistry
3. What experimental problems would confront you if you attempted to determine the concentration of the metal ions in solutions of each of the following reagents? a. Cr +3 which has a maximum absorbance at 407 nm with absorbtivity of 15 M -1 cm -1 and another at 574 nm with ...
October 2, 2016

Organic Chemistry
Compound A has solubility at 20 degrees celsius of .029 g / 10.0 mL. How much of compound A will remain in solution after cooling to 20 degrees C?
September 26, 2016

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

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 i am 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

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
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

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