Tuesday
July 22, 2014

Posts by Sarah


Total # Posts: 3,840

College Algebra
50 gallon barrel plumb full of water springs a leak in the bottom and leaks at a constant rate of two gallons per minute. y=50-2x slope=-2 what does it represent? y-intercept=50 what does it represent? x-intercept=25 what does it represent?

College Algebra
The letters in the word probability are written on separate slips of paper. Find the probability of drawing two i's in a row without replacement.

College Algebra
The letters in the word probability are written on separate slips of paper. One slip of paper is drawn at random. Find P(b)

College Algebra
Find AC A= 2 3 0 4 1 6 C= 2 3 0 1 1 0

College Algebra
If CI=C, find I C= 2 3 0 1 1 0

College Algebra
Line m passes through (2,5) and (-3,-2). Find the slope of a line that is perpendicular to line m.

College Algebra
They didn't line up correctly. I reposted the correct way.

College Algebra
Find AC A= 2 3 0 C= 2 3 4 1 6 0 1 1 0

Math- urgent
Solve for x. 8x-(8+6x)=20 Please show your work.

Math- urgent
Solve for x. x+4 (x+3) =17 Please show your work.

math
an ice cube that is 8 cm on each side is melting at a rate of 4 cm^3 per min. how fast is the length of the side decreasing?

math
find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16, 3. There is a formula but our teacher wants us to do it a specific way. For example, 47, 41, 32, 53, 57. First you find the mean, which is 46 and then subtract it with each number in the set so you get 1...

math
how do you do it the way i showed above? because our teacher doesn't want us to use the formula

math
find the standard deviation for the following: 8,5, 12, 8, 9, 15, 21, 16, 3. There is a formula but our teacher wants us to do it a specific way. For example, 47, 41, 32, 53, 57. First you find the mean, which is 46 and then subtract it with each number in the set so you get 1...

Young ScholarsAcademy
Quention and suani went to ray house of food dinner . their bill was $64 to which they added a 15%tip. how much did they pay in total

College Algebra
A= [2 3 0] [4 1 6] 1. what is the additive inverse of A? 2. find 3A.

College Algebra
Line m passes through (2,5) and (-3,-2) Find the slope of a line that is perpendicular to line m.

College Algebra
Find the probability of drawing two i's in a row without replacement.

chemistry
convert 3.0m to yd

Physical Science
Magnetite

Instructions
The teacher gave us a mini essay that has 16 questions under each chapter (Chapters 1-4, 4 questions per chapter). Her instructions are as follows: "Below you will find short-essay-type questions from each of the Unit 2 chapters. Please select and respond to any ONE quest...

math(help)
In order to do fractions, you need to find the common denominator [bottom number]. IF they don't match then you have to multiply both of the numbers to have the same number. For example questions 3 and 4 both have a common denominator, thus its easy to calculate. 3) (7/15...

physics
v = 50 m/s h = 100 m = x x = 1/2 at^2 t = (square root) x/(1/2) t = 4.51 s Vi = 50 m/s so you have to find the final speed if you want to find the angle of projection, vi = 0 m/s i think cannot be zero vf^2 = vi^2 + 2ad I'm sorry you're going to have to look up this. O...

maths
Are you trying to solve for y?

Math
To calculate the mean we add up all of the numbers and divide by the total number amount for e.g. you have 5 numbers here. Add them up and divide by 5 b) The standard deviation is that complicating equation. You can check this on google to get the exact formula and i think if ...

poiseuille's law
GIVEN: L = 3.0 cm = 0.03 m r = 0.3 mm = 0.0003 m (delta) y = 1.0 m 1 pint = 500 cm^3 [approx.] given a) Find the rate of flow, F = ? b) How long will it taken to inject 1 point of blood, t = ? a & b) I know we need to find the pressure or speed. F = (P at) (A) = (P at ) (pie)...

Math
5 times 0.15 show on a grid paper.

College Algebra
Identify a different point on the line (with whole number coordinates) and tell what it represents.

College Algebra
The equation for the total revenue earned by a company for selling widgets is p=4q. The equation for the total cost of the company for producing widgets if p=q+6. Find the break-even quantity.

College Algebra
The equation for the total revenue earned by a company for selling widgets is p=4q. The equation for the total cost of the company for producing widgets if p=q+6. Graph p=4q

College Algebra
Mints cost 5 cents each and gumballs cost 3 cents each. Kathleen spent 60 cents buying x mints and y gumballs. Slope intercept form: y=-5/3+20 What is the slope and what does it represent in this problem?

College Algebra
Mints cost 5 cents each and gumballs cost 3 cents each. Kathleen spent 60 cents buying x mints and y gumballs. Slope intercept form: y=-5/3+20 What is the y-intercept and what does it represent in this problem?

Organic Chemistry Help Please
We're going over the reactions involving Alkenes and Alkynes. However, I'm extremely confused I how to determine with solvent/solvents to use and also when already given the solvents with the reactants how this will effect the products. I studied the basic mechanisms f...

Math- urgent
Thank you.

Math- urgent
-3 (x-8)+7x=12 What does x equal? Please show your work.

Math- urgent
X+4÷7=-2 What does x equal? Please show your work.

Calculus
Suppose that a population develops according to the logistic equation dP/dt = 0.06P−0.0001P^2 where t is measured in weeks. 1) The carrying capacity is . 2) The growth rate k is . Use your calculator to sketch a direction field for this equation. Sketch the solutions fo...

Math- urgent
Thank you.

Math- urgent
X-30=14-3x What does x equal? Please show your work.

Math- urgent
1/2 (8-6h)=h what does h equal? Please show your work.

Math- urgent
-4x-2+3x=4 What does x equal? Please show all work.

AP Stats
Viruses are infectious agents that often cause diseases in plants. Different viruses have different potency levels, and this fact can be used to detect whether a new virus is infecting plants in the field. In a potency comparison experiment, two viruses were placed on a tobacc...

math
Why is the point 3,0 not considered to be in any of the quadrants?

Calculus!!!
Find f. (Use C for the constant of the first antiderivative and D for the constant of the second antiderivative.) f ''(x) = 8 + x3 + x5

math
The temperature on one day in January for Phoenix, AZ, is 52 degrees Fahrenheit. On the same day in Barrow, AK, the temperature is -23 degrees Fahrenheit. What is the difference between these two temperatures?

Math
How many ways can you arrange the order of 4articles on a shelf?please explain why it is 4 x3x2x1,thanks

Physics problem
An object with a mass of 100kg is dropped from an 80 meter high building and leaves an impression in the ground of 15cm. A.What is the time needed to hit the ground? B. What is the speed of the object when it hits the ground? C. What is the coefficient of the friction between ...

Physics problem
An object with a mass of 100kg is dropped from an 80 meter high building and leaves an impression in the ground of 15cm. A.What is the time needed to hit the ground? B. What is the speed of the object when it hits the ground? C. What is the coefficient of the friction between ...

Math- urgent
One more than 3 times a number is the same as 5 times the number, decreased by 15. Find the number. • Assign the variable • Write an equation • Solve equation

stats
The population (in millions) and the violent crime rate (per 1000) were recorded for 10 metropolitan areas. The data are shown in the following table. Do these data provide evidence to reject the null hypothesis that ƒÏ = 0 in favor of ƒÏ ‚ 0 at ...

history
I'm having a debate about gay marriage. & I'm arguing that people should have the right to marry who they please because church & state are separate & the constitution grants people rights, including marriage rights. If my opponent says then if everyone has rights, why...

University of Belize
5. A 0.500 g sample of a BaCl2•2H2O/Na2SO4 salt mixture, when mixed with water, filtered, and dried, produced 0.225 g of BaSO4. The Na2SO4 was determined to be the limiting reactant. a. Calculate the mass, in grams, of Na2SO4 in the mixture. b. Calculate the mass, in gra...

Physics
On a cloudless day, the sunlight that reaches the surface of the earth has an intensity of about 1.2 103 W/m2. What is the electromagnetic energy contained in 6.4 m3 of space just above the earth's surface?

US History
How did immigration change after 1890?

General Physics 2
Type A dead battery is charged by connecting - PHYSICS HELP? in google search and you'll find a question similar to this on July 17, 2011 good luck

physics
I'm thinking to just divide 632 days by 87.1 days to determine the half-life

physics
If the physical half-life of sulfur-35 is 87.1 days, and the biologic half-life in the testicle is 632 days, what is its effective half-life in this organ? I know i have to find the time and then the half-life. But im having trouble finding the time A(t)=Ao x e ^ (-0.693) (t)...

Math
v-7/5=2 What does v equal? Please show all work.

Physics
F incline= mg sin θ F incline = (4.7 kg) (9.81 m/s^2) sin (26) F incline = 20.21 N = 21 N Check to see at the back of the book if this is the right answer. If not go over the formula sheet and the problems in the book and so you'll realize the answer

English Literature-Critical Thinking
Animals should serve as models for us. They are gentle, cooperative, and family-oriented creatures who fight mainly over territory and mates and rarely kill one another. Humans being engage in group warfare and slaughter one another by millions. In fact, we stop behaving like ...

Math - Urgent
2/3x+1/2x=5/6+2x What does x equal? Please show all work.

Math - Urgent
3-2/9b=1/3b-7 What does b equal? Please show all work

Math - Urgent
3-2/9b=1/3b-7 What does b equal? Please show all work.

Math - Urgent
Yes, that is what I meant. Sorry for the confusion. Thank you.

Math - Urgent
3/4x+2=7+1/3x What does x equal? Please show all work.

Math- Urgent
Thank you.

Math- Urgent
Thank you I was confused because I had -8 as an original answer. How would you work 4x-9=6x-13?

Math- Urgent
2e= 4e-16 What does e equal? Please show all work.

MATHS
In 2006, the digits in Perry's age were the same as the digits in Laura's age, but in reverse order. In 2005, Perry was twice Laura's age. What is the difference between Perry's and Laura's ages?

MATHS
Please help! Pedro and Alice raced two model trains along two straight tracks. Pedro's train travelled 7.5 cm every minute. Alice's train travelled 7.5 cm every second. How many centimeters had Alice's train travelled when Pedro's train had travelled 2.75 metre...

Physics
To win the game, a place kicker must kick a football from a point 40 m (43.744 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 23 m/s at an angle of 30.9◦ from the horizontal. The acce...

Physics
A fireman, 34.9 m away from a burning building, directs a stream jet of water from a ground level fire hose at an angle of 44.2◦ above the horizontal. If the speed of the stream as it leaves the hose is 60.5 m/s, at what height will the stream of water strike...

Physics
To win the game, a place kicker must kick a football from a point 40 m (43.744 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 23 m/s at an angle of 30.9 ◦ from the horizontal. The acc...

Physics
A five-sided object, whose dimensions are shown in the figure, is placed in a uniform magnetic field. The magnetic field has a magnitude of 0.72 T and points along the positive y direction. Determine the magnetic flux through each of the five sides. picture can be found on web...

physics
yes that's right, thank you very much.

physics
A cardiologist uses an ultrasound scanner with an operating frequency of 3.5 MHz that can detect Doppler frequency shifts as small as 0.1 kHz. What is the smallest flow velocity detectable with this device? Two frequencies are given so I know I have to convert the units but i...

physics
okay, one plane is flying north, straight up and the wind blows the plane east [right]. This is almost similar to pythagorean theorem. My guess is to use x^2 + y^2 = z^2. But im pretty sure there's a formula for this in the first or two chapters of the physics book. Look ...

physics
There is a relationship between momentum and energy KE = 1/2mv^2 p = mv m = p/v KE = 1/2 (p/v)v^2 KE = 1/2 pv From wiki answers The relation between kinetic energy is proportional to the square of velocity. Momentum is directly proportional to velocity. If the momentum of an ...

Physics
Find the potential energy when x = 0 or x = -1 Then using this energy then find speed using KE = 1/2mv^2 m = 1 kg

Math- Urgent
1/4 w=13 What does w equal? Please show all work.

Math- Urgent
Thank you.

Math- Urgent
Thank you. I have one more question. 1/4 w=-13

Math- Urgent
15=y+24 What does y equal? Please show all work.

History
Those are all good ideas. Thank you!!

History
Those are all good ideas. Thank you!!

History
My text doesn't say specifically anything, but I have to infer. For Portugal I found four things, but for Spain I only thought of that they had strong armies, they wanted to find the Spice Islands, and that they wanted to spread Christianity to non-Christian areas.

History
What are some factors that are responsible for the emergence of Portugal and Spain as the most dominant powers of Europe during the early 16th century? Make sure to have multiple factors for each country.

math
Anyone can help me on this qns? The Fourier series expansion for the periodic function,f(t) = |sin t|is defined in its fundamental interval. Taking π = 3.142, calculate the Fourier cosine series approximation of f(t), up to the 6th harmonics when t = 1.09. Give your answe...

maths
make x the subject 1/4wxy-p=k

Maths
t (1/8x+p)=m Make x the subject

Fourier Series
A periodic function f(t), with period 2π is defined as,f(t) = c for 0 < t < πf(t) = -c for -π < t < 0where c = 1.4, Taking π = 3.142, calculate the Fourier sine series approximation up to the 5th harmonics when t = 1.63. Give your answer to 3 d...

Physics
I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile wi...

Physics
I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile wi...

Physics
I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile wi...

Physics
I really don't get why I am getting this question wrong? Please can you explain to me how to do this question step by step so that I can understand it please? :( i have been stuck on this question for quite a while now. Determine the stopping distances for an automobile wi...

Science
What is the relationship between the number of gas particles and pressure. Are these two variables directly proportional or do they vary inversely?

algebra
Can you help me solve for like terms: x - 14y + 3x - 1 2 - 10x - 3 + y 19x - 3y - 37 - y

Macolm X
2011–2012 seasons, Patrice Bergeron entered a game against the Ottawa Senators with a plus/minus rating of +20. In the game, which Boston won 4–3; Bergeron was on the ice for one of his team's qualifying goals as well as all three qualifying goals by the Senators...

Chemistry
Calculate the molarity of a solution made by adding 28.2 mL of concentrated ammonia (28.0 % by mass, density 0.880 g/mL) to some water in a volumetric flask, then adding water to the mark to make exactly 500 mL of solution. (It is important to add concentrated acid or base to ...

Physics
A track star in the long jump goes into the jump at 12 m/s and launches herself at 20.0° above the horizontal. How long is she in the air before returning to Earth? (g = 9.81 m/s2)

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