Friday

August 29, 2014

August 29, 2014

Total # Posts: 69,918

**Math**

Thanks, Reiny I see you answer a lot of questions for people. Thank you for taking the time out to help others that struggle in math. Your help is greatly appreciated
*April 30, 2014*

**math**

-2d + 18 - 4d = 60
*April 30, 2014*

**Physic**

13.9cm / 2 = 6.95cm F(finger) 0.026kg * 9.8m/s^2 * 6.95cm / 3.2cm = 0.553N F(thumb) 0.553N - 0.026kg * 9.8m/s^2 = 0.299N
*April 30, 2014*

**Physic**

You hold a uniform, 26.0-g pen horizontal with your thumb pushing down on one end and your index finger pushing upward 3.2 cm from your thumb. The pen is 13.9 cm long. Find the two forces. Force of Finger (Answer: 0.553N) Force of Thumb (Answer: 0.299N) Answers are provided ...
*April 30, 2014*

**BIOLOGY**

when chlorophyll runs out of electrons where does it find new ones? The light dependent reactions use energy from sunlight to produce what 3 things?
*April 30, 2014*

**Biology help**

what is the name of the process that happens in the matrix of the mitochondrion? What is the name of the process that happens last in cellular respiration and takes place on the inner membrane?
*April 30, 2014*

**HELP!!**

Find the coodrinates of the other endpoint of the segment given (-24,15) is the midpoint and one of the endpoint is (-18,10)
*April 30, 2014*

**Pre algebra**

yes
*April 30, 2014*

**Math Help 2 Questions Urgent!**

actually the Pythagorean theorem is only used to find the length of a missing side of a right triangle, you use the distance formula which is square root (x-x)^2+(y-y)^2
*April 30, 2014*

**consumer math**

true
*April 30, 2014*

**Calculus Help Please Urgent!!!**

Prove that the integral on the interval [a,b] of x is equal (b^2-a^2)/2 integral a to be (x)dx = (b^2-a^2)/2 using the definition of a Definite Integral. This is the limit of a sum approach. show steps please!!! Thank you!!!
*April 30, 2014*

**Math**

(y^2-y+2)/(y+2)
*April 30, 2014*

**math**

thanks
*April 30, 2014*

**math**

Which equation shows the identity property of multiplication? a) 6 x 0 = 6 b) 6 x 4 = 4 x 6 c) (6x2)x4 = 6(2x4) d) 6 x 1 = 6
*April 30, 2014*

**CHEMISTRY HELP !!!!**

how do i get voltage cell????
*April 30, 2014*

**CHEMISTRY HELP !!!!**

I have to use the formula below but I dont know how! :( Delta G = -nFE
*April 30, 2014*

**CHEMISTRY HELP !!!! **

Cell Designation : E (measured) = Sn I Sn^2+ II Cu^2+ I Cu Temp= 3 Celsius Temp= 276.15 Kelvin Delta G= ????? Show work please!!!!
*April 30, 2014*

**CHEMISTRY HELP !!!! **

Pb I Pb^2+ (1M) II Cu^2+ (1M) I Cu Temp.= room temp E cell (measured) = delta (calculated) =??? Keq (calculated) =???? Please show steps so I can do the rest. show calculations for delta G and Keq for an exemplary pair. For Pb I Pb^2+ II Sn^2+ I Sn Thank you!
*April 30, 2014*

**math**

Ben works 6 hours each day at his job at a local fast food restaurant. He went home sick after working 2 hours. what is the fraction of the 6 hour shift did he Not work?
*April 30, 2014*

**Physic**

Child 1 is 2.0 m from the axis of rotation, and child 2 is 1.5 m from the axis. The merry-go-round completes one revolution every 4.8 s. Find the angular speed of each child. (Answer: For both child is 0.278rev/s) Please show all work on how to get the answer.
*April 30, 2014*

**Physic**

A 220 g cart moves on an air track (a one-dimensional system in which motion is friction free) at 1.3 m/s. It collides with and sticks to another cart of mass 550 g, which was moving in the opposite direction at 0.80 m/s before the collision. What is the velocity of the ...
*April 30, 2014*

**statistics**

For hair color, Brown (B) is a dominant trait and Blond (b) is a recessive trait. If one parent has pure blond hair and one parent has hybrid brown hair, complete the Punnett square and questions that follow. a) What is the probability that their first child will have pure ...
*April 30, 2014*

**Math**

(y^2-y+2)/(y+2)
*April 30, 2014*

**Math**

(n^2 – 5n + 4) / (n – 4)
*April 30, 2014*

**statistics**

The mean income per person in the United States is 36,500
*April 30, 2014*

**physics**

A solid uniform sphere is released from the top of an inclined plane .25 m tall. the sphere rolls down the plane without slipping and there is no energy lost from friction. What is the translational speed of the sphere at the bottom of the incline?
*April 30, 2014*

**Science**

a 5 kg skateboard moves at 7 m/s^2 . What is the force of the skateboard? 35 N<--- 12 2 m/s^2
*April 30, 2014*

**language art pllz help**

All correct just got 5/5 100%
*April 30, 2014*

**math**

Determine the distance to which the 90 kg painter can climb without causing the 4 m ladder to slip at its lower end A as shown in Figure 1. The top of the 15 kg ladder has a smaller roller, and at the ground the coefficient of static friction is 0.25. The mass center of the ...
*April 30, 2014*

**fizk**

Determine the distance to which the 90 kg painter can climb without causing the 4 m ladder to slip at its lower end A as shown in Figure 1. The top of the 15 kg ladder has a smaller roller, and at the ground the coefficient of static friction is 0.25. The mass center of the ...
*April 30, 2014*

**fizk**

3 - A box of mass 2 Kg lies on a rough horizontal floor with the coefficient of friction between the floor and the box being 0.5 (Figure 3). A light string is attached to the box in order to pull the box across the floor. If the tension in the string is TN, find the value that...
*April 30, 2014*

**Help with one limit**

I'm asked to find the limit as n approaches infinity of : [(2^(n) +1]/ [2^(n+1)]. The review we were given has [1+ 2^(-n)] / 2 as the next step, but I'm not quite sure how to make that leap myself. The final answer is 1/2. How do you solve this limit?
*April 30, 2014*

**physics 1**

The drawing shows an intravenous feeding. With the distance shown, nutrient solution (ρ = 1050 kg/m3) can just barely enter the blood in the vein. What is the gauge pressure of the venous blood? Express your answer in millimeters of mercury.
*April 30, 2014*

**physics**

Airplane flies at velocity of 400 mph and the wind is blowing north at 200 mph
*April 30, 2014*

**Programming**

Create a full program with proper instructions for the user that asks the person to choose between the following options: Find out if a year a leap year Number of days in a month for any given year Print out the number of days in a year, a leap year, and weeks in a year. After...
*April 29, 2014*

**Science**

a 5 kg skateboard moves at 7 m/s^2 . What is the force of the skateboard? 35 N<--- 12 2 m/s^2
*April 29, 2014*

**algebra**

Write a ratio in simplified form of the area of the shaded figure to the area of the figure which encloses it. I have a square with height 5w and width 5w. Enclosing it are a right triangle on each side, which have a width of 6 and have the square's height (5w) also ...
*April 29, 2014*

**English help**

What are some interesting facts about Nikki Giovanni's writing?
*April 29, 2014*

**Chemistry**

I see my mistake now, thanks!
*April 29, 2014*

**Math**

Math - Cindy, Tuesday, April 29, 2014 at 8:44pm At Bobs diner, it costs $8.00 to purchase two hamburgers and one order of fries. The "family pack" costs 30.00 and comes with six hamburgers and six orders of fries. If the prices are constant,how much does one ...
*April 29, 2014*

**math**

a coding supervisor must determine the number of full-time equivalents (FTEs) needed to code 500 discharges per week. If it takes an average of 20 minutes to code each record and each coder works 7.5 productive hours per day, how many FTEs will the coding supervisor need?
*April 29, 2014*

**Chemistry **

Would it take more 0.1 M HCl or 0.1 M H2SO4 to neutralize 30 ml of NaOH?
*April 29, 2014*

**chemistry**

At 22 degrees Celsius and 729 torr pressure, what will be the volume of 75 mol of NH3 gas?
*April 29, 2014*

**math**

Sara has x ribbons and 4 extra ribbons. Jill has 12 ribbons. Express the number of ribbons that Sara has in terms of x.
*April 29, 2014*

**Math**

Circle Graphs Month | Snowfall | Percent | Angle Measure November | 1 | ? 1% | ? 3.6 December | 4 | ? 4% | ? 14.4 January | 5 | ? 5% | ? 18 February | 2 | ? 2% | ? 7.2 How would I make a circle graph? Or did I do something wrong? The month and snowfall were given and I found ...
*April 29, 2014*

**math**

thanks, both of you
*April 29, 2014*

**math**

You are buying tickets for rides at a carnival. Tickets cost $2 each. You want to spend no more than $30 on tickets. Write an inequality to represent this situation.
*April 29, 2014*

**math**

thank you
*April 29, 2014*

**math**

Simplify by combining like terms. 9m + 5m - 4
*April 29, 2014*

**math**

Can 3t^2+5t-2 be factored?
*April 29, 2014*

**algebra 1**

The Ricco family filled the gasoline tank of their car at the beginning of a long trip. Their car used gasoline at the rate of 1 gallon every 21 miles. When they stopped for lunch, they had driven 315 miles, and there were 9 gallons of gasoline left in the tank. How many ...
*April 29, 2014*

**Govt college of technology**

A wheel rotates at 200rev/min.if the radius is 4in through what total distance does a point on the rim travel in 20min
*April 29, 2014*

**Science**

What is the force that results from a 3,000 kg car accelerating at 20.00 m/s^2
*April 29, 2014*

**algebra 1**

Mrs. Hernandez owns a computer training business. She charges a lab fee plus an hourly fee to train office workers on various software programs. It costs $265.00 to attend a 6-hour course and $345.00 for an 8-hour course. Which equation relates x, the number of hours in the ...
*April 29, 2014*

**Science**

Am I right?
*April 29, 2014*

**Science**

Which of the following would have the greatest force? an object with low mass accelerating slowly an object with low mass accelerating quickly an object with high mass accelerating quickly<--- an object with high mass accelerating slowly
*April 29, 2014*

**Cheměstry**

The following two solutions were combined and mixed well: 150.00 mL of a 3.500 M iron(¡¡¡) nitrate solution and 760.00mL of a 1.600M magnesium nitrate solution. 20.00mL of the final solution was transferred with a pipette into an empty 250.00mL volumetric ...
*April 29, 2014*

**physics**

A 1500-kg car coast in neutral down a 2.0degrees hill. The car attains a terminal speed of 20.0 m/s. The question is:how much power must the engine deliver to drive the car on a level road at 20.0 m/s?? Help me out please!!
*April 29, 2014*

**Statistic in Social Science**

4. The verbal part of the Graduate Record Exam (GRE) has a ƒÝ of 500 and ƒã = 100. Use the normal distribution to answer the following questions: a. If you wanted to select only students at or above the 90th percentile, what verbal GRE score would you ...
*April 29, 2014*

**aptitude**

Three individuals form a partnership and agree to divide the profits equally. X invests $4,500, Y invests $3,500 and Z invests $2,000. If the profits are $1,500, how much less does X receive than if the profits were divided in proportion to the amount invested?
*April 29, 2014*

**Math**

In an isosceles triangle, each side is 18 inches more than the third side. The perimeter equals 54 inches. What is the length of each side?
*April 28, 2014*

**business math**

A simple interest calculation provides a useful estimate of what compound interest will be if ____________
*April 28, 2014*

**Algebra**

Which of following is a solution to x^3=8 24, 5, 2.73 or 2?
*April 28, 2014*

**physics**

A large cube (one side measuring 1.0 m) is submerged in water, with the top face of the cube 8.7 m below the surface. Find a) the force exerted by the water on each face of the cube. b) the buoyant force on the cube.
*April 28, 2014*

**math**

if two dependent samples of size 20 are used to test the difference between the means, the degrees of freedom for a t-statistic is 19, true or false
*April 28, 2014*

**math**

it cost $.15 to make copies at the library and a new printer cost $200 each copy is $.02 how many copies does it take to the cost at the library and from a new printer become equal
*April 28, 2014*

**math**

Dwayne answered 80% of the questions on a quiz correctly. If he answered 40 questions correctly, what was the total number of questions on Dwayne’s quiz?
*April 28, 2014*

**Math**

I get it--the square root.
*April 28, 2014*

**Math**

I don't understand what you mean by the last step. Is the answer supposed to be 2h/y?
*April 28, 2014*

**Math**

1. Sqrt 14r * 2 sqrt 4r Is this 4r sqrt 14? 2. (sqrt 64 y^10 h^5)/(sqrt 16 y^12 h^3) Is this (sqrt 4h^2)/(y^2)
*April 28, 2014*

**Math**

Never mind, the square root.
*April 28, 2014*

**Math**

That was actually the first time I saw o as a variable...
*April 28, 2014*

**Math**

Simplify sqrt 250 j^4 o^5 Everything is under the radical.
*April 28, 2014*

**Science chemistry**

How much mgs can be obtained from 20g of mg and 20 g of s by the reaction mg+s_>mgs
*April 28, 2014*

**Math-Clarification**

Identify any real and extraneous solutions for the equations below. Sqrt p = -1 So, would this have no real or extraneous solutions?
*April 28, 2014*

**Math**

Simplify (3 sqrt 8 + 4 sqrt 9)^2.
*April 28, 2014*

**Math**

Identify any real and extraneous solutions for the equations below. Sqrt p = -1
*April 28, 2014*

**Epidemiology**

1. Evidence of an increased risk of lung cancer associated with cigarette smoking was sought by Doll and Hill. In one study, 649 lung cancer cases were matched by age, and gender to 649 controls; 647 of the cases and 622 of the control had a history of smoking cigarettes. a. ...
*April 28, 2014*

**math**

the length of a rectangle is 3 times its breadth.its perimeter is 64cm.find its length?
*April 28, 2014*

**us history**

would D. a coalition against migrant labor be the right answer?
*April 28, 2014*

**Physics**

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.
*April 28, 2014*

**Math**

Ryan left the science museum and drove south. Gabriella left three hours later driving 42 km/h faster in an effort to catch up to him. After two hours Gabriella finally caught up. Find Ryan's average speed
*April 28, 2014*

**Chemistry **

what three substances are usually electrolytes?
*April 28, 2014*

**gfd**

A 10.6 kg object oscillates at the end of a vertical spring that has a spring constant of 2.05 × 104 N m-1 . The effect of air resistance is represented by the damping coefficient b = 3.00 N .s m-1 . (a) Calculate the frequency of the damped oscillation. (b) By what ...
*April 28, 2014*

**problem solving**

Erica painted a picture of her dog. The picture has an area of 3600 cm square and is square. She has placed the picture in a frame that is 5 cm wide. What is the perimeter of the picture frame?
*April 27, 2014*

**Probability**

320
*April 27, 2014*

**math, geometry**

The bases of trapezoid ABCD are \overline{AB} and \overline{CD}. Let P be the intersection of diagonals \overline{AC} and \overline{BD}. If the areas of triangles ABP and CDP are 8 and 18, respectively, then find the area of trapezoid ABCD.
*April 27, 2014*

**Physics**

A ammeter is to be constructed using a galvanometer that has a 2.00 mA full-scale deflection and internal resistance of 50.0 ohms. It must be good enough to detect 40 mA, which is the max current. How would one do this? How would you make a voltmeter able to read the largest ...
*April 27, 2014*

**physics**

A 1.50 ✕ 103 kg car starts from rest and accelerates uniformly to 17.1 m/s in 12.7 s. Assume that air resistance remains constant at 400 N during this time. (a) Find the average power developed by the engine. W (b) Find the instantaneous power output of the engine at t...
*April 27, 2014*

**Precalculus**

I know I posted this question already ,but I posted the wrong one.... Sets A,B and C are subsets of U. U= positive integers less than 16 A= prime numbers B= factors of 36 C= multiples of 4 (A intersect B)' INTERSECT C {?} I meant INTERSECT not union! My answer: 4,8,12
*April 27, 2014*

**Chemistry**

A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].
*April 27, 2014*

**Chemistry**

A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].
*April 27, 2014*

**Math**

a random sample of 28 patients across the country had an average cost of 5250 with a standard deviation of 629.at a= 0.025 can it be concluded that the mean is less than 5400
*April 27, 2014*

**Help**

If upon retirement in 20 years Greg plans to invest 800,000 in a fund that earns 4 percent, What is the maximum annual withdrawal he can make over the following 15 years
*April 27, 2014*

**grammar**

it should be related to a fantastic voyage --
*April 27, 2014*

**Precalculus**

For this problem I drew a Venn diagram.. Sets A,B and C are subsets of U. U= positive integers less than 16 A= prime numbers B= factors of 36 C= multiples of 4 (A intersect B)' union C {?} My answer: The apostrophe stands for negation! According to my Venn diagram, that ...
*April 27, 2014*

**science: biology**

they eat herbivores
*April 27, 2014*

**science: biology**

The hyena is a carnivore. Justin claims that hyenas need plants to survive, but Kaden says that they don't because they only eat meat. Who is correct and why?
*April 27, 2014*

**math ratio**

a:b = 10:15 b:c = 15:18 c:d = 18:48 a:b:c:d = 10:15:18:48
*April 27, 2014*

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