Friday

July 25, 2014

July 25, 2014

Total # Posts: 70,549

**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...

**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?

**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.

**physics**

Airplane flies at velocity of 400 mph and the wind is blowing north at 200 mph

**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...

**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

**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 applyi...

**English help**

What are some interesting facts about Nikki Giovanni's writing?

**Chemistry**

I see my mistake now, thanks!

**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 hamburge...

**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?

**Chemistry **

Would it take more 0.1 M HCl or 0.1 M H2SO4 to neutralize 30 ml of NaOH?

**chemistry**

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

**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.

**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 t...

**math**

thanks, both of you

**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.

**math**

thank you

**math**

Simplify by combining like terms. 9m + 5m - 4

**math**

Can 3t^2+5t-2 be factored?

**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 gallo...

**Science**

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

**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 co...

**Science**

Am I right?

**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

**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 fla...

**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!!

**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 u...

**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?

**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?

**business math**

A simple interest calculation provides a useful estimate of what compound interest will be if ____________

**Algebra**

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

**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.

**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

**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

**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?

**Math**

I get it--the square root.

**Math**

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

**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)

**Math**

Never mind, the square root.

**Math**

That was actually the first time I saw o as a variable...

**Math**

Simplify sqrt 250 j^4 o^5 Everything is under the radical.

**Science chemistry**

How much mgs can be obtained from 20g of mg and 20 g of s by the reaction mg+s_>mgs

**Math-Clarification**

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

**Math**

Simplify (3 sqrt 8 + 4 sqrt 9)^2.

**Math**

Identify any real and extraneous solutions for the equations below. Sqrt p = -1

**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. N...

**math**

the length of a rectangle is 3 times its breadth.its perimeter is 64cm.find its length?

**us history**

would D. a coalition against migrant labor be the right answer?

**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.

**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

**Chemistry **

what three substances are usually electrolytes?

**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 perc...

**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?

**Probability**

320

**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.

**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 v...

**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 ...

**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

**Chemistry**

A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].

**Chemistry**

A solution formed by dissolving an antacid tablet has a pH of 9.18. Calculate [H+].

**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

**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

**grammar**

it should be related to a fantastic voyage --

**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 me...

**science: biology**

they eat herbivores

**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?

**math ratio**

a:b = 10:15 b:c = 15:18 c:d = 18:48 a:b:c:d = 10:15:18:48

**math**

between 8:00 and 8:30, A has gone 15 km The speed difference B-A = 15 km/hr So, since B is 15km behind A at 8:30, it will take 1 hour to make up the distance.

**CALCULUS**

pi, not pai dx/dt = 12sin^2(t)cos(t) dy/dt = -21cos^2(t)sin(t) dx/dt and dy/dt are both zero when sin(2t)=0, or at multiples of pi/2. So, the open intervals are (0,pi/2),(pi/2,pi),(pi/3pi/2),(3pi/2,2pi). The graph bears this out: enter parametric plot x=4sin^3(t), y=7cos^3(t) ...

**College algebra**

This year the state highway department in Montana purchased 276 identical trucks for official use. The purchased price was 5,680,088. Due to budget shortfall next year the department plans to purchase only 69 cars and 119 trucks. It will be charged the same price for each car ...

**informal logic **

To criticize a deductive argument logically, one might:

**ag 1**

The average daily high temperature for the month of may in ocaia Florida is appromaimated by thee function. F(n)=0.2n+80. Where n is the day of the month

**grammer**

My sister and I share a three year age gap as she is twenty one while I am eighteen. how to improve this sentence

**grammer **

In addition to having common personality traits with my mother, I also play the same two instruments my mother did when she was young. How to improve this sentence?

**Precalculus**

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: 1,4,5,6,7,8,9,10,11,12,13,14,15 union 4,8,12 {4,8,12}

**Calculus Help Please Urgent!!!**

a) Estimate the area under the graph of f(x)=7+4x^2 from x=-1 to x=2 using three rectangles and right endpoints. R3= ??? Then improve your estimate by using six rectangles. R6= ??? Sketch the curve and the approximating rectangles for R3 and R6? b) Repeat part (a) using left e...

**English help**

I'm writing an essay about something that is worth dying for. For me, something that is worth dying for is my religion. How would I write it about religion? Need help!!

**chemistry**

how many grams of HCL is needed to produce 200 grams of hydrogen?

**Science**

7.D 8.C

**Science**

my answers: 1.A 2.C 3.D 4.B 5.B 6.A 7.DC 8.

**Science**

1. If the net force on an object is O N, the forces are considered unbalanced true false 2. Most people in the united states use feet and miles to measure distance in their everyday lives. why do scientist in the United States use meters to measure distance? Meters allow scien...

**Math **

I'm extemely lost at some point, how do you solve this equation by using the inverse of the coefficient matrix and by echelon method -x-8y=12 3x+24y=-36

**Language arts**

If you had to write a creative story what would it be about?

**finance**

If the average new home costs $ 275,000 today, how much will it cost in 10 years if the price increases by 5 percent each year?

**Math**

3.14x8=your answer Pie times the radius

**science**

Why are there usually more producer in an ecosystem than consumers? a). There is less energy available to the consumers. b). There is more energy available to the consumers. My answer is ( a ).

**physics**

A stone is dropped from the deck of the bridge. The sound of the splash reaches the deck 3 seconds later. If sound travels at 342 m/s in still air, how high is the deck of bridge above the water?

**Math**

(2 + sqrt 2)/(2 - sqrt 2) = (x)/(3 + sqrt 10) How to solve for x?

**Math**

Thanks, but can you please verify how you got the (2√5 + 5)? Because I thought that √5 * (2+√5) would be 2√25.

**Math**

(sqrt 5)/(2 - sqrt 5)

**chemistry urgent! **

what is the net ionic for these following balanced equations: 2(NH4)3PO4(aq) + 3Ba(OH)2(aq) -> Ba(PO4)2(s) + 6H2O(l) + 6NH3(g) 2HNO3(aq) + K2CO3(aq) -> H2O(l) + CO2(g) +2KNO3 NaF(aq) + HCl(aq) -> NaCl(aq) + HF(aq)

**Algebra 1**

Yes.

**business math**

On May 1, Emerson Fast bought 10 Manitoba On May 1, Emerson Fast bought 10 Manitoba Polar bonds with a coupon rate of 7.875%. The purchase price was $101. 375, and the commission was $8 per bond. Manitoba Polar bonds pay interest on April 1 and October 1. Polar bonds with a co...

**Algebra**

The formula.

**Algebra**

That's exactly what it said in the textbook.

**Algebra**

The equation r = (sqrt A)/(pi) gives the radius r of circle with area A. What is the radius of a circle with the given area? Write your answer as a simplified radical and as a decimal rounded to the nearest hundredth. a. 50 ft^2

**calculus help**

At time t=0, an astronaut stands on a platform 3 meters above the moon's surface and throws a rock directly upward with an initial velocity of 32 m/sec. if the acceleration due to gravity is 1.6 m/sec^2. a) find the equations of motion for the throwing of this rock. -1. a(...

**Math**

Please Help!!

**Math**

It doesn't make sense!!!

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