Tuesday
July 29, 2014

Posts by Chris


Total # Posts: 2,147

Help!!!
Thanks Emily! Got a 100!

science(check answers)
im the one who needs help not give help

Physics
A car experiences a constant acceleration of 2.3 m/s2. How long does it take (in s) for the car's speed to increase from 6.6 m/s to 17.9 m/s?

PHYSICS
Suppose that the electric potential outside a living cell is higher than that inside the cell by 0.0928 V. How much work is done by the electric force when a sodium ion (charge = +e) moves from the outside to the inside? no idea how to do this can i just have the step by step ...

physics
The coefficient of linear expansion for a silver strip is 1.9 × 10−5 / ◦C. What is its length on a hot day when the temperature is 32◦C if the strip is 1.4 m long when it is −15◦C? Answer in units of m Your answer must be within ±...

Math
Kyle is training for a bike race. He rides 5 miles one day, 10 miles the next day, and 15 miles the third day. If Kyle repeats this schedule, what is the total distance he will have ridden after 5 days?

5th grade math
Tia collected $10 for a walk-a-thon and $ 5 from each friend. What is the total amount of donations she collected from 4 friends? Is my answer below correct? Friend - 1,2,3,4 Donations - $5, $5, $5, $5 = $20 Answer is $20 from 4 friends.

Geometry
Suppose point J has coordinate of -2 and JK=4. Then what is the possible coordinate(s) for K?

Math
Let f(x)=ln(3x^(2)-2x-4). Find the domain.

social studies
A) Thomas Jefferson Because He Was In That Time Frame and was actually president when the Louisiana purchase Happened. :)

Chemistry
What is the effect of Independent Variable on Dependent Variable ?

Chemistry
What is the effect of Independent Variable on Dependent Variable ?

Calculus
what is the limit n to infinite of cos1*cos(1/2)*cos(1/4)*cos(1/8)*cos(1/16)*...*cos(1/2^n)

Batteries - Engineering
Here we consider instead dissolving guns (which we will assume are pure iron) with sulfuric acid. Fe+H2SO4->FeSO4+H2 It is apparent that they must use an outside source of electrical power to drive the dissolution of the iron. They use a small current so that the dissolutio...

Solar Energy - Engineering
In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O --> H2 + ½O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential for the hydro...

Engineering
What is the answer for b and c? Please Help.

Math 5th grade
Mrs. Rodriguez mixed water and plant food in a container and filled the container until it measured 6/8 gallon. She poured 4/8 gallon of the mixture on her geraniums and 1/8 gallon on her petunias. How much of the mixture did she have left after pouring ot on her plants?

Chemistry
What are the formulas of the salts that precipitate when the reaction mixture (n-butyl alcohol, sodium bromide, water, and sulfuric acid) is cooled?

chemistry
From the periodic table, you get the atomic mass of Mg, which is 24.31. Atomic mass is grams/mole, by dimensional analysis: (2.5g)/(24.31g/mol)=0.1028 moles of Magnesium as the grams units cancel out. *This answer does not have proper significant figures.

Chemistry
Balancing Complete Redox Reactions I need help on the half reduction part for both reduction and oxidation of Cl2(g) --> cl^1- (aq) + OCl^1- (aq). I got both of the half reactions started. Cl2 --> Cl^- (Reduction) .... Cl^1- (aq) + OCl^1- (aq) (Oxidation). I need know al...

Chemistry
Balancing Complete Redox Reactions I need help on the half reduction part for both reduction and oxidation of Cl2(g) --> cl^1- (aq) + OCl^1- (aq). I got both of the half reactions started. Cl2 --> Cl^- (Reduction) .... Cl^1- (aq) + OCl^1- (aq) (Oxidation)

science
what is matter

Chemistry
A solution is made by adding 0.100 mole of ethyl ether to 0.500 mole of ethyl alcohol. If the vapor pressures of ethyl ether and ethyl alcohol at 20 oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20 oC (assuming ideal behavior) is:

Chemistry
Benzene (C6H6) and toluene (C5H5CH3) form nearly ideal solutions. At 20°C the vapor pressure of benzene is 74.7 Torr and that of toluene is 22.3 Torr. a) Find the equilibrium partial pressures above a solution of 100.0 g benzene and 100.0 g toluene. b) Find the mole fracti...

math
explain how you could show five less than a number using an expression

Maths
An operation produces (A-1)/A from a fraction A=m/n, where m is not equal with n and m is not zero. If the initial value of A is 22/47 and the operation is repeated 2012 times, the final output is a/b. What is a and b?

Math
Find the common factors of each set of numbers. 1. 1,4,8,32_____

civics
I have searched for a case study done on women being paid less in the workforce and cannot come up with anything. Would any of you know of any real-life examples of women being paid less?

physics
An iron rod(a=11.8x10-6 C-1) has a length of 1000 meters (or 1 km) at 0 degrees Celsius. If the rod must expand 10 cm to bridge a gap, to what temperature must the rod be heated?

physics
An iron rod has a length of 1000 meters (or 1 km) at 0 degrees Celsius. If the rod must expand 10 cm to bridge a gap, to what temperature must the rod be heated?

Physics
A container of volume 19.4 cm3 is initially filled with air. The container is then evacuated at 0oC to a pressure of 6.0 mPa. How many molecules are in the container after evacuation if we assume that air is an ideal gas?

Maths
The line segment connecting two points (-2,7) and (4,-1) can be expressed in parametric equations as x=-a+bt, y=c-dt (0<=t<=1). Find the values a,b,c,d.

Maths
Suppose x,y,p and q are real numbers and the inverse element for multiplication of the complex number x+yi is 5-11i. If (5-11i)^2 * (x+yi)^3 = p+qi, the value of p+q can be expressed as a/b. What is the value of a and b?

Maths
If x(x+i)+y(y+i)-14(8+i)=0, find x and y.

Maths
I made a small typing mistake. The center is (10,sqrta). so, what is a?

Maths
In polar coordinates, the parametric equations x=6+cos(f) and y=sin(f) represent a circle C1. In Cartesian coordinates, there is a circle C2 that is externally tangent to C1, tangent to the y-axis, and centered at (10,sqrt2). What is the value of a?

Maths
z=x(1-i)+24(-2+i) , x is a real number. if z^2 is a negative real number what is x?

Bank management
You own a corporate bond that carries a 5.8 percent coupon rate and pays $10000 at maturity in exactly 2 years. The current market yield on the bond is 6.1 percent. Coupon interest is paid semiannually and the market price is $9944.32. Calculate Macaulay's duration and mod...

Maths
Consider the line defined by the parametric equations x=3d-10, y=2d+1. The y-intercept of this line can be expressed as a/b. Find a and b.

maths
If the quadratic equation (8+i)x^2+(a-i)x+38-2i=0 has real roots, what is the value of the positive real constant a?

government
New Hampshire was the first State to _____.

Maths
Thanks for your help in all the questions

Maths
Given a rectangular object with dimensions 2cm by 22cm, we want to increase the length of the smaller dimension and decrease the length of the larger dimension by Xcm each. If the the diagonal has to be kept less than (sqrt360)cm in length, the range of X can be expressed as a...

Maths
If the vertex of the parabola y=x^2-2ax+2a^2 is on the line y=24x+25 what is the value of a (positive number)

Maths
The difference between the two roots of the quadratic equation x^2+ax+b=0 is 32 and the larger root is 3 times the smaller root. What is the value of a and b ?

6th grade math
If Jack takes 6 hours to wash 4 cars then at that rate how man cars could be washed in 42 hours? we got answer of 28 cars but then how do you determine the rate the cars were being washed? the teacher gave answer of 2/3 cars per hour but we don't understand how she got that.

6th grade math
It takes 1.5 hours to walk three miles. How far can he go if he walked for 4 3/4 hours?

6th grade math
Dante can buy 20 marbles for $1.50. How many marbles can he buy for $27.00? Do you divide &27.00 by $1.50 then multiply that number by 20 to get 360 marbles?

Maths
Suppose that a is an integer such that x^2+2xy−360y^2+ax+38y+361 can be factorized as the product of linear expressions in x and y. What is the value of a ?

Maths
If the graph of y=(ax-5)/(x+b) does not intersect either of the lines x=7 or y=−3 , what is the value of a and b ?

Statistics
Smoking habit Socioeconomic status High Low Smoking 15 40 55 Not smoking 25 10 35 Total 40 50 N=90 a. For these ordinal variables, which hypothesis testing is appropriate to test the relationship between SES and smoking habits variable? b. Write the HO and H1 c. Perform the te...

Statistics
2. A researcher wants to find out how students feel about a proposal to ban smoking on campus. She selected THREE groups of “students who currently smoke”, “students who formerly smoke”, and “students who never smoke”. Also, she selects a sample o...

Maths
For two sets X={-1,1,a} and Y={7,16,b} f(x)=x^3+8 is a bijective function from X to Y. What is the value of a and b ?

Maths
If (x−48)−(y+16)i=0, what are the values of x,y?

Math
A shopper asked for 50 cents worth of apples. The shopper was surprised when she received five more than the previous week. Then she noticed that the price had dropped 10 cents per dozen. What was the new price per dozen?

Maths
For 2 sets X={1,2,3,4},Y={−15,0,30}, f is a surjective function from X to Y. If f(1)=−15 and f(2)=f(4)=0, what is f(3) ?

6th grade math
When planting trees in a forest, the US Forest Service recommends giving each seedling about 1/200 acre on which to grow. About how many seedlings should be planted in 1/3 of an acre? 1/3 times 200/1?

Mathematical induction. I'm stuck. So far I have..
For all integers n ≥ 1, prove the following statement using mathematical induction. 1+2^1 +2^2 +...+2^n = 2^(n+1) −1 Here's what I have so far 1. Prove the base step let n=1 2^1=2^(1+1)-1 False. Someone else suggested that the base step is : 1+2^1=2^(1+1)-1 Thi...

statistics
How many friends must you have to guarantee that at least five of them will have birthdays in the same month?

Discrete Math
How many friends must you have to guarantee that at least five of them will have birthdays in the same month?

Math Reasonableness
Luciel has 365 cookies to sell. She wants to store them in plastic bags that hole 12 cookies each. she estimates she will need 30 bags.Is he right? Why or why not?

Math Explanation
If you are asked to find 834/80=, how do you know the quotient is greater than 10 before you actually divide?

Maths
Consider the parabola y=x^2-2px+p+1. If the real number p has the property a<p<b, then the vertex of y is above the line y=−12x+13. What are a and b?

Maths
Given that a and b are real numbers and that x satisfies the inequality ax>=b when x>=14, what is the smallest integer x that satisfies ax>a+2b ?

6th grade math
Rachel completed 3/4 of her cleaning in 4 hours. How many total hours will Rachel spend cleaning? 4 divided by 3/4 4/1x4/3=16/3= 5 1/3 hours Is this correct?

Maths
If a line with x-intercept −5 and y-intercept 35 passes through point P=(5,a) , what is the value of a ?

Maths
Let y=ax+b be the equation of the line with x-intercept 2 and y-intercept −12. What are a and b values?

Maths
Given that −24<A<39 , let x and y be the maximum and minimum integer values, respectively, of −2A+5. What is x and y?

Maths
Consider the line passing through two points P=(1,8) and Q=(−1,3). If the line also passes through point R=(15,a), what is the value of a?

maths
Given that a and b are real numbers and that x satisfies the inequality ax>=b when x>=75, what is the smallest integer x that satisfies ax>a+2b ?

Statistics
The American Academy of Pediatrics (AAP) recommends that kids 2-5 years old watch no more than (on average) 1.6 hours a day of quality programming. A researcher selected a sample of 101 kids in the neighborhood and asked their parents how many hours per day they allow their ki...

Statistics
1.The average number of acts of physical violence in a random sample of 150 TV movies was 4.5 acts with a standard deviation of 0.75. At the 95% confidence interval level, what is your estimation of the mean range of all movies shown in the television? Explain the result in on...

math
3x21=63 63-3=60 -The answer is 21

Physics
A 0.568 kg particle has a speed of 1.57 m/s at point A and kinetic energy of 7.67 J at point B. What is its kinetic energy at A? What is its speed at point B? What is the total work done on the particle as it moves from A to B?

Physics
A block of mass 2.30 kg is pushed 2.38 m along a frictionless horizontal table by a constant 16.0 N force directed 26.9o below the horizontal. Determine the work done by the applied force. Determine the magnitude of the normal force exerted by the table. Determine the magnitud...

physics
If a woman lifts a 16.2 kg bucket from a well and does 6.33 kJ of work, how deep is the well? Assume that the speed of the bucket remains constant as it is lifted.

Maths
Two candidates A and B are up for election. A is so popular that the number of votes for B is expected to be less than or equal to 10% of A's votes. If the total number of votes for both candidates is 110 , what is the minimum number of votes we could expect A to receive?

maths
If P=(a,a) is a point on the line y=−2x+27, what is the value of a?

maths
If a line with x-intercept −3 and y-intercept 21 passes through point P=(8,a) , what is the value of a?

physics
So, 25(.45+.45)-1/2(8.5)(.45)^2?

physics
The driver of a car, traveling at a constant 25 m/s, sees a child suddenly run into the road. It takes the driver 0.45s to hit the brakes. As it slows, the car has a steady acceleration of 8.5 m/s^2. What's the total distance the car moves before it stops?

Geometry
A plane is heading 25° west of south. How many degrees south of west is this plane flying?

FIN 370
1. (defining capital structure weights) templeton extended care facilities, inc. is considering the acquisition of a chain of cemeteries for $340 million. Since the primary asset of this business is real estate, templeton’s management has determined that they will be able...

6th grade math
Thank you so much.

6th grade math
The lasagna recipe requires two pounds of ground beef for ever six cups of tomato sauce. How much beef is necessary if you only have one cup of tomato sauce?

fin 370 # 2
(individual or component costs of capital) Your firm is considering a new investment proposal and would like to calculate its weighted average cost of capital. To help in this, compute the cost of capital for the firm for the following: a. A bond that has a $1,000 par value (f...

fin 370 # 2
(individual or component costs of capital) Your firm is considering a new investment proposal and would like to calculate its weighted average cost of capital. To help in this, compute the cost of capital for the firm for the following: a. A bond that has a $1,000 par value (f...

Math
Estimate the total weight of two boxes that weigh 9.4 lb and 62.6 lb using rounding and compatible numbers. Which estimate is closer to the actual weight?Why?

fin 370
(individual or component costs of capital)Compute the cost of the capital for the firm for the following:? a. A bond that has a $1,000 par value (face value) and a contract or coupon interest rate of 11.7%. The bonds have a current market value of $1,125 and will mature in 10 ...

finanace
Compute the cost of the capital for the firm for the following:? a. A bond that has a $1,000 par value (face value) and a contract or coupon interest rate of 11.6%. The bonds have a current market value of $1,124 and will mature in 10 years. The firms marginal tax rate is 34%....

finance
Templeton Extended Care Facilities, Inc. is considering the acquisition of a chain of cemeteries for $350 million. Since the primary asset of this business is real estate, Templeton’s management has determined that they will be able to borrow the majority of the money nee...

finance
Templeton Extended Care Facilities, Inc. is considering the acquisition of a chain of cemeteries for $350 million. Since the primary asset of this business is real estate, Templeton’s management has determined that they will be able to borrow the majority of the money nee...

finance
Templeton Extended Care Facilities, Inc. is considering the acquisition of a chain of cemeteries for $350 million. Since the primary asset of this business is real estate, Templeton’s management has determined that they will be able to borrow the majority of the money nee...

6th grade math
The ratio of the number of adults to the number of students at the prom has to be 1:10. There are 477 more students than adults. How many adults are at the prom? 1/2x+477=10/2x?

6th grade math
Thank you!!!

6th grade math
At a country concert, the ratio of the number of boys to the number of girls is 2:7. If there are 250 more girls than boys, how many boys are at the concert?

physics
You throw a baseball directly upward at time t = 0 at an initial speed of 12.5 m/s. What is the maximum height the ball reaches above where it leaves your hand? At what times does the ball pass through half the maximum height? Ignore air resistance and take g = 9.80 m/s2.

physics
In a game against the White Sox, baseball pitcher Nolan Ryan threw a pitch measured at 34.4 m/s. If it was 18.4 m from Nolan's position on the pitcher's mound to home plate, how long did it take the ball to get to the batter waiting at home plate? Treat the ball's ...

SAT Math
It is 11

Algebra
z=1/3 the value of18z^2-15z?

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