Thursday
September 29, 2016

Posts by sarah

Total # Posts: 5,568

Trig
Cosine theta=8/17 and 270 degrees is < theta, and theta is< 360
September 28, 2016

History
My answer is C
September 28, 2016

History
Based on Common sense and the crisis what conclusion can be made about Thomas Paine? A : Thomas Paine accepted blame for causing the war B: Thomas Paine believed that colonist should remain loyal to the king C : Thomas Paine used his writing to persuade and inspire others. D...
September 28, 2016

Physics
We have a charge q = -0.6 x 10^-6 C at origin. And a vector r = (4 m, 3 m, 0 m). Find the electric field E(r) as a vector expressed in terms of i j and k. What is the distance in this case? Magnitude of r? Also, how do I find the Electric field as a vector? I'm stuck..
September 27, 2016

math
how do I order these from least to greatest: 1/2, -0.75, 0.6, -1/2
September 26, 2016

Chemistry
Aqueous solutions of copper (II) sulfate, CuSO4, and potassium carbonate, K2CO3, a blue parcipitate of copper (II) carbonate forms in addition to one other compound. We have to write the balanced chemical equation for that but our teacher didnt teach us anything about that
September 24, 2016

Math , trigonometry
From a point on the ground 20m from the base of a tree the angle of the elevation to the top of the tree is 47 degrees. Calculate the height the of the tree correct to the nearest metre ???
September 23, 2016

bio
1. Complete the following conversions: 1ul= what mal I thought 1000 100ul = what ml 50ml = what ml ul=1.5 ul=0.06ml ul=0.003ml idk how to do this was not in lab
September 19, 2016

Math
Solve for x 4(log(x)+5)=6
September 19, 2016

Math
Solve for p 93=12(2)^p
September 19, 2016

chem
If you were asked to convert 25 cg to the unit hg, which of the following would be the first fraction used in the conversion? 1 hg/10^2 10^2/1hg 10^2 hg/ 1cg 10^-2 g/1 cg
September 19, 2016

calculus and chemistry
Thank you so much I realized I was missing the -5 at the end
September 18, 2016

calculus and chemistry
A container of hot liquid is placed in a freezer that is kept at a constant temperature of 10°F. The initial temperature of the liquid is 160°F. After 5 minutes, the liquid's temperature is 60°F. How much longer will it take for its temperature to decrease to ...
September 18, 2016

calculus
A container of hot liquid is placed in a freezer that is kept at a constant temperature of 10°F. The initial temperature of the liquid is 160°F. After 5 minutes, the liquid's temperature is 60°F. How much longer will it take for its temperature to decrease to ...
September 17, 2016

English
How do i correct this? She wants pink and gray curtains in her bedroom I believe blue and white would be prettier.
September 15, 2016

English
Is this correct? Carol couldn't start the car after leaving the football game. Fortunately, however, Roger came along and spotted the trouble quickly.
September 15, 2016

FRENCH
MERCI MmeJMcGin!
September 15, 2016

FRENCH (:
Did I word the wordings right and is #3 & #4 in its right simple future and is #5 is in its proper conditional form? I'd appreciate the help!
September 15, 2016

FRENCH
1. Quel travail voulez-vous? (What job do you want?) - Je veux être un pédiatre . 2. Quel type d'education avez-vous recu? (What kind of education have you received? - I got my M.D in med school and finished pediatric residency. J'ai obtenu mon M.D à...
September 15, 2016

American Government
Where can the strengths of the Articles of Confederation be seen in the Constitution? A) The constitution allows states the ability to control most of their own affairs. B) The constitution allows states the power to tax citizens. C) the constitution allows states the ability ...
September 14, 2016

algebra
How do you write 4.2 x 10 to the 5th power in standard form?
September 12, 2016

Algebra
Use the properties of exponents to simplify the following expression. Write the answer in scientific notation. (5.6x10^5) (9.9x10^-8) divided by (8.4x10^-4) (5x10^6) =28.9x10^-1 I added 5.6 9.9 8.4 5 5+-8+-4+6+ -1
September 12, 2016

Algebra
would my answer be 6,761,*10^6 or 6,761,*10^7 both saying its wrong
September 12, 2016

Algebra
Write the number in scientific notation. 6,761,000 I said it was 6,761,*10^3 Its saying its wrong?
September 12, 2016

Algebra
so the answer would be 630,*10^9? or 630,*10^8 becuase 6.2x 10^8 it is saying its wrong.
September 12, 2016

Algebra
If you are 20 years old,you have been alive for more than 630,000 seconds,write the last number in scientific notation? 630,000,000 I said it was 630,*10^7 idk how its wrong!
September 12, 2016

Algebra
(9x10^8)(3x10^3) what I did was 9 times 3 got 27x. Then did 8+3=11. Put it all together and got 27x10^11. Its saying it is wrong though
September 12, 2016

Algebra
A light year, the distance light travels in 1 year, is approximately 5.9×10^12 miles.A nearby galaxy is approximately 1.2×10^7 light years from our galaxy. Find the distance in miles between our galaxy and the nearby galaxy. IDK this question. I first thought you ...
September 12, 2016

Algebra
Write the following number in scientific notation. 0.157 I thought the answe was 0.157x10^3. it is wrong need help! No idea how its wrong
September 12, 2016

Algebra
Write the following number in scientific notation. 50,800 I thought the answer was 50.8x10^4 Need help
September 12, 2016

Homework
I will call you when I will get back from visiting my sister. will/get back/visiting find a incorrect answer? will is incorrect here?
September 11, 2016

Algebra
Steve I watched a example with one that had nothing in front. So it threw me off because I tried to follow that example and steps. Thank you for your help
September 10, 2016

Algebra
5-2 [5(-2)+4(2)/ -3(3)+3(-4)] my work : I did 5(-2) + 4(2) and -10 +8 then the bottom _9 (-12) = -2/-24 I need major help! Dont know what to do with 5-2 even.
September 10, 2016

Algebra
2^-1+4^-5 I thought 5/8 but its wrong. help please
September 9, 2016

Algebra
(2x^-2y^6)^4 / (4x^3y^-4)^2 = I got 16x^14/y^16 The computer is saying it's wrong and I don't get it. Even watched a video on similar problem. Help me!
September 9, 2016

Algebra
(x^-2)^3 (x^2)^4 on the bottom its x^15 I did this to get my answer (x)^-6 (x)^-8 /x^15 got x^-4 / x^15= x-14-(15)= -29 final answer is x^-29 IDK what I did wrong the computer saying its wrong! Help pleas
September 9, 2016

Math
The population of a town in 1920 was 3500 people. The town's population decreased linearly, and in 1927 the population was 3185. Find a formula for P, the town's population, in terms of t, the number of years since 1920.
September 9, 2016

Math
The following equation relates u and t. 3t=(1)/(7+u) Solve for u as an explicit function of t.
September 9, 2016

English
Is this sentence complete Swimming in the heated water of an indoor pool was a new experience for Elizabeth.
September 8, 2016

English
I think the answer is "Yes, I think that those big gas guzzlers are a threat to the ecology, don't you?" My friend thinks its without quotations Yes, I think that those big gas guzzlers are a threat to the ecology, don't you?
September 8, 2016

English
I think the answer is "Jackie, please see whether the postman has oh there he is now." But my friend thinks its this way "Jackie, please see whether the postman has, oh! There he is now."
September 8, 2016

Algebra
what is the perimeter of the figure if the length is 15/6in and bottom is 15/6 in what would it be. I thought you do 15+ 15+15+15 and divided by 4. you get 60/4 and then final answer would be 15
September 7, 2016

Algebra Word promblems
Alba Tross had an annual salary of $50,000. She received a 5 percent pay cut one year followed by a 5 percent pay raise the next. a. What is Alba’s final salary? Would it be 50,000 - 5% + 5% =49.875 b. What is Alba’s final salary less than her original salary? Not ...
September 7, 2016

Fractions
5+ 2/5 would the answer be 5/1+ 2/5 = 5/1 times 5/5 +2/5= 25/5 + 2/5 = 27/5
September 6, 2016

Fractions
would the answer be 32/3? Not sure
September 6, 2016

Fractions
4/3 divided by 1/8
September 6, 2016

Algebra
A family decides that they can spend 3/5 of their monthly income on house payments if their monthly income is $1,500 how much can they spend for house payments?
September 6, 2016

Fractions
would the answer be 42/40 but then simplify it to 21/20?
September 6, 2016

Fractions
Find the area of the triangle with base 7/8 and height 6/5
September 6, 2016

Fractions
3/4 times 4/3
September 6, 2016

Algebra
A family's monthly income is $1,500, and they spend $300 each month on food. Write the amount they spend on food as a fraction of their monthly income in lowest terms.
September 6, 2016

Fractions
would be answer be 6/1 times 7/2 = 6 times 7 on top and 1 times 2 on bottom = 42/2 divided both by 2 to get 21/ 1
September 6, 2016

Fractions
6 divided by 2/7
September 6, 2016

Algebra
A 12-acre piece of land is subdivided into 4/5 acre lots. How many lots are there?
September 6, 2016

Algebra
A 12-acre piece of land is subdivided into 45 acre lots. How many lots are there?
September 6, 2016

Fractions
2/3 times 5/7
September 6, 2016

Algebra
Reduce 134/34 to lowest terms.
September 6, 2016

Fractions
a bag of candy holds exactly 1/4 pound of candy. How many of these bags can be filled from 9 pounds of candy?
September 6, 2016

math
Home Center sells rectangular picture frames. The ratio of the length to the height in centimeters is 7:5. What would be the length of a frame that is 15 centimeters high?
September 5, 2016

calculus
If F(x) = f(xf(xf(x))), where f(1) = 4, f(4) = 6, f '(1) = 4, f '(4) = 5, and f '(6) = 6, find F '(1).
September 5, 2016

calculus
Determine the points in the interval (0, 2π) at which the graph of the function below has a horizontal tangent line. f(x) = 10 cos x + 5 sin 2x There should be three
September 4, 2016

calculus
The graphs of f and g are shown. Let h(x) = f(g(x)) and s(x) = g(f(x)). f(-1)= 4 f'(x)=1 g(-1)=5 g'(-1)=-1/2 f(8)= 6 f'(x)= 2 g(x)= 2 g'(x)=-1/2 (a) Find h'(−1). (b) Find s'(8).
September 4, 2016

calculus
94 is not right
September 4, 2016

calculus
If F(x) = f(xf(xf(x))), where f(1) = 4, f(4) = 6, f '(1) = 4, f '(4) = 5, and f '(6) = 6, find F '(1).
September 4, 2016

calculus
Find the vertical tangents of f(x)=10 cos x + 5 sin 2x
September 4, 2016

Math
The sum of the opposite of a number and the absolute value of the number is equal to the number itself.True,sometimes true,never true?
September 4, 2016

Math
The sum of the opposite of a number and the absolute value of the number is equal to the number itself. True,sometimes true,or never true?
September 4, 2016

Electricity and Magnetism
In a thundercloud there are two equal and opposite charges ±35C separated by 6km. Assuming that they can be treated as point charges, what is the magnitude of the electric force between them?
September 2, 2016

math
An ant starts at position (0, 0) and walks north, east, south or west, one unit at a time. How many di erent paths of length 8 units finish at (0, 0)?
August 31, 2016

PHYSICS
JOHN WANTS TO PADDLE HIS CANOE ACROSS A RIVER THAT IS 200M WIDE, HE STARTS FROM THE EAST SIDE. THE WATER CURRENT FLOWS NORTH-SOUTH AT 0.5MS^-1. IT TAKES JOHN 252S TO CROSS THE RIVER. 1. DRAW A DIAGRAM TO GRAPHICALLY REPRESENT THE VELOCTY VECTORS OF THE WATER CANOE AND THEIR ...
August 28, 2016

Algebra 1
1. 4f (5)+7 2. F(X)=2x-6 3. g(X)= x^2-x-x-9 4. h(x)=4-X
August 27, 2016

biology
Which organelle(s) are likely to be involved in the reduced efficiency of amino acid recycling in wimpys liver cells?
August 25, 2016

PHYSICS
A bucket containing cement has a mass of 3kg. One end of a rope is attached to the handle of the bucket and the other end is wound around a horizontally mounted cylinder on frictionless bearings. The mass of cylinder is 6kg and its radius is 0.10m. The moment of inertia of the...
August 24, 2016

math
90%
August 22, 2016

Math
Where would I put parentheses in this problem to make it correct: 8+4x2+7divided by3=20
August 15, 2016

algebra
You want to celebrate all of your recent successes. You decide to reward yourself and a special someone with a vacation to a destination of your choosing. For your trip you will need to stay in a hotel/resort and rent a car. You decide to rent a car for the duration of your ...
August 13, 2016

Biochemistry
Calculate the mass (in g) of solid potassium hydroxide required to prepare: a) 1.75 litres of a solution with pH 11.5
August 3, 2016

Chemistry
Thanks DrBob222!
July 29, 2016

Chemistry
Could you please help me answer this question....
July 29, 2016

Chemistry
What are 2 allotropes of carbon? Could you please compare the physical and chemical properties....
July 29, 2016

Chemistry
Thanks!
July 29, 2016

Algebra
Write the equation of a line that contains (-8,4) and the midpoint of the segment connecting (-10,5) and (-5,0) in standard form. I'm not sure what I'm doing wrong. I found the midpoint (-7.5, -3.5), found the slope, and put the equation in standard form. I got x + y...
July 27, 2016

maths
simplify 6x+4y*-3x+5x-2x*3y
July 24, 2016

Calculus
Evaluate the definite Integral Integral [0 to pi/4] cos(2x)sec^2(pi/4 sin(2x))dx
July 7, 2016

Calculus
use te fundamental theorem of calculus to evaluate the integral Integral [0, pi/3] sin^2(x)dx I'm confused on what F(x) should be
July 7, 2016

Chem
Thank you Just one more question Why is it (63.55/2) g Cu ?
July 5, 2016

Chem
Can someone please explain how to tackle this problem? Cu - Anode electrode Zn - Cathode electrode A current of 2 amps is sustained for 16 minutes. what mass of Cu(s) is deposited on the zinc electrode? (Faradays' constant: 96500 C/mol e-)
July 5, 2016

chem
(sorry - accidentally posted it as physics problem) Can someone please explain how to tackle this problem? Cu - Anode electrode Zn - Cathode electrode A current of 2 amps is sustained for 16 minutes. what mass of Cu(s) is deposited on the zinc electrode? (Faradays' ...
July 5, 2016

Physics
Can someone please explain how to tackle this problem? Cu - Anode electrode Zn - Cathode electrode A current of 2 amps is sustained for 16 minutes. what mass of Cu(s) is deposited on the zinc electrode? (Faradays' constant: 96500 C/mol e-) Please and thank you!!
July 5, 2016

Probability and statistic
Suppose X has an exponential distribution with mean equal to 13. Determine the following: (a) Upper P left-parenthesis x ⁢ greater-than 10 right-parenthesis (Round your answer to 3 decimal places.) (b) Upper P left-parenthesis x ⁢ greater-than 20 right-parenthesis...
July 1, 2016

probability and statistic
Suppose that the number of asbestos particles in a sample of 1 squared centimeter of dust is a Poisson random variable with a mean of 1000. What is the probability that 10 squared centimeters of dust contains more than 10090 particles? Round your answer to 3 decimal places.
July 1, 2016

Calculus
Yeah That's where I was confused.Probably. Thank you!
June 30, 2016

Calculus
Okay thanks! I have drawn my graph like that!
June 30, 2016

Calculus
Wait the Points are (-1,0) (0,0) and (1,0). Im confused since the critical points and these points are both at x=-1, x=1
June 30, 2016

Calculus
Yes, I was confused why x=-1 and x=1 had two different points. Maybe it's a typo?
June 30, 2016

Calculus
Sketch the graph of the function that has the following properties. f is continuous on (-infinity, infinity). points: (-1,2), (0, 0), (-1,0) f'(x)>0 at (-infinity, -1) f'(-1)=0 f'(x)<0 at (-1, 1) f'(1)=0 f'(x)>0 on (1, infinity) f"(x)<0 on...
June 30, 2016

Calculus
A printed page is to have 1.5 inches margin on all sides. The page should contain 144 square inches of type. What dimension of the page will minimize the area while still meeting these other requirements?
June 29, 2016

calc
Find the volume of the solid generated by revolving the region bounded by y=e^(5/2x),y=0,x=1, and x=5 about the x-axis.
June 29, 2016

calc
Find the volume of the solid generated by revolving the given region in the 1st quadrant about the y-axis: y=10x^2,x=0,y=810.
June 29, 2016

calculus
Find the volume generated by revolving about the x-axis the region bounded by the following curves y=sqrt/(4x+3),x=0,x=4, and y=0. (Use "pi" for π).
June 29, 2016

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