Friday

April 25, 2014

April 25, 2014

Total # Posts: 777

**Algebra II**

Ravi is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges $75 and allows unlimited mileage. Company B has an initial fee of $55 and charges an additional $0.80 for every mile driven. For what mi...

**Algebra II**

Suppose that an object is dropped from a height of h meters and hits the ground with a velocity of v meters per second. Then v= sqrt19.6h. If an object hits the ground with a velocity of 24.2 meters per second, from what height was it dropped? Carry your intermediate computati...

**Maths**

In covering distance, the speeds of A & B are in the ratio of 3:4.A takes 30min more than B to reach the destination. Find time taken by A to reach the destination?

**Chemistry**

I'm sorry for the late reply, I now just got back to this. Thank you so much!

**Chemistry**

Please help me. :(

**Chemistry**

Is it that the three different people weighed something of 2.00g and got the readings of 7.32 g for the weight? So, in that case, would the answer be A?

**Chemistry**

Three people weigh on a standard mass of 2.00 g on the same balance. Each person obtains a reading of 7.32 for the mass of the standard. These results imply that the balance that was used is ___________. a) neither accurate nor precise b) accurate c) precise d) accurate and pr...

**Math probability - HELP**

A bag contains 3 red, 5 yellow, 2 green and 6 blue marbles. If one marble is chosen at random, replaced, and then a second marble is chosen at random, find the probability of obtaining 2 marbles of different colors.

**Math**

A bag contains 3 red, 5 yellow, 2 green and 6 blue marbles. If one marble is chosen at random, replaced, and then a second marble is chosen at random, find the probability of obtaining 2 marbles of different colors.

**Grade 5 maths**

Alan, Bill and Carl shared $372. After Alan spend 2/ 5 of his share, Bill spent 1 /2 of his share and Carl spent 1/3 of his share, the boys found they had the same amount of money left. (a) What is the ratio of Alan's share to Bill's share to Carl's share? (b) How ...

**maths- year 5**

If the students were given 80cm square of wooden board to make a box, what is the largest cube they can make with the board?

**maths**

There are a total of 50 ducks and goats in a farm. They have 154 legs altogether. How many ducks are there?

**math**

lmagine an equilateral triangle and a square. The triangle has sides of 10 m and the square has sides of 15 m. One ant walks completely round the triangle twice and a beetle which walks two and a half times as fast starts walking at the same time around the square. How many la...

**MATH**

7/10 of Delia's money is equal to 1/5 of Sarah's money. They have $225 altogether How much does Delia have?

**Physics- hard problem**

A 14000 N automobile travels at a speed of 40 km/h northward along a street, and a 7000 N sports car travels at a speed of 62 km/h eastward along an intersecting street.(a) If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the veloci...

**Physics**

A automobile travels at a speed of northward along a street, and a 7000-N sports car travels at a speed of eastward along an intersecting street. (a) If neither driver brakes and the cars collide at the intersection and lock bumpers, what will the velocity of the cars be immed...

**calculus**

Use Euler's method with step size .2 to estimate y(.4), where y(x) is the solution of the initial value problem y=x+y^2, y=0. Repeat part a with step size .1

**Really need help in Calculus Problem?!**

Use Euler's method with step size .2 to estimate y(.4), where y(x) is the solution of the initial value problem y=x+y^2, y=0. Repeat part a with step size .1

**Calculus**

Find the Taylor series of f(x) = sin(x) at a = Pi/3.

**geometry**

that gives me a definition i deed an explanaiton

**geometry**

what does the definition of angle bisector mean

**english**

PLEASE HELP bruces viewpoint made long range planning very difficult for him. what word goes in the blank a:subliminal b:perceptive c:myopic D: discerning i know the definitions but its still hard i think its myopic

**Calculus**

Find the limit of the sequence {√(2), √(2√(2)), √(2√(2√(2))),...

**chemistry**

A 76.00-pound flask of mercury costs $151.50. The density of mercury is 13.534 g/cm3. What is the price of one gram of mercury?

**physics**

An athlete swims from the north end to the south end of a 50.0m pool in 20.00s and makes the return trip to the starting point is 22.0s

**STATISTICS**

Wrong and quit cheating on your stats exam

**MATHS**

Logan Academy students take part in four field trips during the school year. They visit a library, a museum, a park, and a zoo. How many different ways can the four trips be ordered for the school year?

**Calculus**

Estimate ç4 1 ln(x)−3dx using 6 midpoint rectangles

**Maths**

Find the values of x when, x raised to the power root x = x raised to the power x whole under root.

**Mathematics**

Find the values of x when, x raised to the power root x = x raised to the power x whole under root.

**Calculus**

An animal population is increasing at a rate of 150+20t animals per year. By how much does the animal population increase between year 5 and year 8?

**physics**

The figure below shows three circuits, each consisting of a switch and two capacitors, initially charged as indicated. Let qL represent the charge on the left-hand capacitor in each circuit. The switches in all circuits are then closed.

**physics**

A group of swimmers is resting in the sun on an oﬀ-shore raft. They estimate that 2.85 m separate a trough and an adjacent crest of surface waves on the lake. They count 13 crests that pass by the raft in 20 s. How fast are the waves moving?

**Calculus**

At 2:00 PM a car's speedometer reads 30 mi/h. At 2:10 PM it reads 50 mi/h. Show that at some time between 2:00 and 2:10 the acceleration is exactly 120 mi/h^2.

**Calculus**

Suppose that 3<= f'(x) <=5 for all values of x. Show that 18 <= f(8)-f(2) <=30.

**physics**

A 0.4 kg hockey puck moving at 30 m/s hits a straw bale, stopping in 1.4 s. What impulse was imparted to the hockey puck?

**Calculus**

Two people start from rest at the same point. One walks east at 3 mi/h and the other walks northeast at 2 mi/h. How fast is the distance between the people changingg after 15 minutes?

**Calculus**

A lighthouse is located on a small island 3 km away from the nearest point P on a straight shoreline and its light makes four revolutions per minute. How fast is the beam of light moving along the shoreline when it is 1 km from P?

**Calculus**

A boat is pulled into a dock by a rope attached to the bow of the boat and passing through a pulley on the dock that is 1 m higher than the bow of the boat. If the rope is pulled in at a rate of 1 m/s, how fast is the boat approaching the dock when it is 8 m from the dock?

**Calculus**

A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the building at a speed of 1.6 m/s, how fast is the length of his shadow on the building decreasing when he is 4 m from the building?

**maths**

Suppose you have $9000 to invest and you invest part of it ($×) in a high risk venture at 11.5% per annum and the remainder with the bank at 4.5% per annum, both for one year. 1) write an algebraic expression for the amount of money invested at 4.5% 2) write an algebraic...

**Physics, help me!**

On a curved roadway of radius 100m, the suggested speed is 35mph(approximately 16m/s). What must the coefficient of friction be between a car's tires and the road for the car to safely negotiate the curve at the posted speed?

**English**

LOL so true ^

**physics**

the initial velocity of a 4 kg box is 11 m/s, due west. after the box slides 4 m horizontally its speed is 1.5 m/s. determine the magnitude and the direction of the non conservative force acting on the box as it slides.

**trig**

A plane has an airspeed of 200 miles per hour and a heading of 28.0°. The ground speed of the plane is 207 miles per hour, and its true course is in the direction of 38.0°. Find the speed and direction of the air currents, assuming they are constants. (Round your answe...

**abnormal psych**

# 1.44 (1 pts.) Dr. Green is an admitting psychologist at a psychiatric hospital. Unfortunately, every client she interviews receives the diagnosis of schizophrenia. Dr. Green's diagnostic system ignores A) reliability. B) variance. C) base rates. D) treatment potential. #...

**psych**

21(1 pts.) Based on the incidence of Fetal Alcohol Syndrome in various ethnic groups, which of the following individuals would be considered high risk? A) a woman of French Canadian descent B) a woman of Irish descent C) a woman of Italian descent D) a woman of Native American...

**Physics**

A 40,000 kg railroad car initially traveling at 10 m/s collides in elastically with a 20,000 kg railroad car intially at rest. The cars stick together. What is their final speed?

**Physics**

A circular disk of radius 30 cm is rotating with an angular velocity of 2 radians / s. What is the tangential velocity of a point on the rim of the disk? What is its centripetal acceleration?

**Science**

What is the power of a 900 n force applied over a distance of 40 m for 45 sec? What is the horsepower?

**Physics**

A force of 5 N is applied to a door perpendicular to its face at a distance of 0.75 m from its hinge. What is the torque on the door about the hinge?

**Physics**

A car with 60 cm diameter tires is traveling at a constant speed of 100 km/hr. What is the angular velocity of the tires in rad/s?

**Physics**

A car with 60 cm diameter tires is traveling at a constant speed of 100 km/hr. What is the angular velocity of the tires in rad/s?

**Physics**

A force of 25 N accelerates a body by 5 m/s2. What is the mass of the body?

**Math**

One calling plan offers long distance calls for .03 per minute. Another plan costs $2.00 per month but offers long distance service for 0.01 per minute. Write and solve an equation to find the number of long distance minuets for which the two plans would cost the same.

**science**

82 liters plus 3.876 liters is what?

**Algebra**

You have to wrap gift boxes for your club project. Each box is 4.5 inches wide, 7 inch long, and 4 inches tall. What size sheet of wrapping paper do you need to cut to cover the box? Gift wrap paper comes in sheets which are 30 inches wide and 36 inches long. How should you cu...

**homework**

which locations have the greatest number of hours of daylight on june 21? the fewest hours of daylight?

**physics**

magnitude: 1.83 m/s^2 acceleration: left or -x axis

**Physics**

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.82 m. The stones are thrown with the same speed of 9.83 m/s. Find the location (above the base of the clif...

**Geometry**

A rectangular garden has an area of 55m2 and a perimater of 32 m. If its length is doubled, what is the % of increase on the new area and perimeter?

**Pre Algebra**

simplify the following expression x+4(y+8x) Write the property that justifies each step

**Chemistry**

What is the value of the rate constant for a reaction in which 75.0 percent of the compound in a given sample decomposes in 80.0 min? Assume first order kinetics. Use the integrated rate law for a first order reaction. Remember at 75 percent reaction, 25 percent of the reactan...

**Chemistry**

What is the value of the rate constant for a reaction in which 75.0 percent of the compound in a given sample decomposes in 80.0 min? Assume first order kinetics. Use the integrated rate law for a first order reaction. Remember at 75 percent reaction, 25 percent of the reactan...

**Math**

The answer is.... wait for it... Looking at the first equation, we see we are adding 4+4 =8 and using "00" to finish the addition. In other words, we are just adding the first numbers and using the zeros as place holders. So, in the second problem, add the 24+34 and ...

**maths**

Please help! At a cup cake baking competition, Alan baked 55 fewer cupcakes than Tom while Sally baked twice as many cupcakes as what Alan and Tom baked together. If the three of them baked a total of 1125 cupcakes, how many cupcakes did Tom bake? Many thanks

**chemistry**

2H2+1O2=2H2O delta H=-136 kJ A) how many joules are released when 35.0 grams H2O form B)how many grams of hydrogen burn when 278 kJ are released. C) Draw a potential energy diagram of this reaction.

**science, chemistry**

2Al(s)+ 3Cl2(g)=2AlCl3(s) For the above reaction calculate: A) delta H, then state whether the reaction is endothermic or exothermic B) delta s, then whether the reaction becomes more or less disorder. C) delta G, the state whether the reaction is spontaneous or non-spontaneous

**Chemistry**

The free energy of a single electron falling through a potential difference of one volt is 1 electronvolt (eV). Therefore, on a per electron basis, x volts → x eV. Calculate the maximum wavelength of light (in nanometers) that provides enough energy to an electron to par...

**science-chemistry**

a bicycle tire that has a volume of 0.85L is inflated to 140 pounds per square inch. What will be the pressure in the tire if the number of moles of gas is doubled?

**Science-Chemistry**

and do i do the same thing for number 2?

**Science-Chemistry**

1.)A sample of oxygen took 55 seconds to travel a certain distance. How long would it take for the same number of moles of nitrogen to travel the same distance. 2.) A sample of hydrogen gas traveled 45m in a given amount of time. An unknown gas traveled 7.6m in the same amount...

**science-chemistry**

can u help me on part c a little more?

**science-chemistry **

please anwser soon, a rigid 4.10L flask contains a mixture of 1.25 moles of H2, 0.250 mole of O2, and sufficient Ar so that the partial pressure of Ar in the flask is 1.00 atm. The temperature is 63.5 degrees C A) Calculate the total pressure in the flask B) calculate the mole...

**Chemistry**

2CO(g) + O2(g) 2CO2(g) Go = -511.6 kJ and So = -173.1 J/K at 314 K and 1 atm. The maximum amount of work that could be done by this reaction when 2.43 moles of CO(g) react at standard conditions at this temperature is__________ kJ. how?!

**algebra**

Cupcakes cost $1.50 each to produce with fixed cost of $50. a) Express the cost C, of producing the cupcakes as a linear function of x cupcakes produced. b)Find the average cost, C=C/x and simplify appropriately. c) What is the horizontal asymptote of C? Interpret. d) Graph C ...

**math**

There are 20 10% off cards, 10 15% off cards, 6 20% off cards and 4 50% off cards. What is the probability that a person will draw a 50% off card on the third draw?

**Accounting**

$10,000,000 face value, zero coupon bonds due in 20 years, priced on the market to yield 8% compounded semiannually.

**Customer Relation**

I know what a internal customer is, but what are some ways you can resolve conflict with a internal customer.

**Business**

Is it possible for a small business to oversegment its market?

**Math**

Showing work, what is 32.4 divide by 1038? :)

**calculus**

Let z = ∫e^(sin(t))dt from x to y a = x b = y I tried thinking about it like a chain rule but even then i'm a little unsure. I know dz/dt = e^(sin(t)). Can you please point me in the right direction if i'm supposed to use the chain rule.

**math**

James spent 62 % of high school budget on books. In degrees what measurement would that be on a circle graph? A. 62% B. 162% C. 177% D. 223%

**calculus**

sketching the level curve of f(x,y) = y/(x^2 + y^2) Just wondering if there is a way to get the equation of the line cause I have no clue if im supposed to do it another way or im just rusty and need to review my precalc notes.

**Algebra 1**

-c(11c+4)

**math**

A square and a rectangle each have a perimeter of 100 feet. Explain how this is possible.

**science**

The pull of gravity keeps the Moon in orbit around Earth. The distance between the Earth and Moon is about 380,000 kilometers. A crew of astronauts leaves Earth on a Monday and lands on the Moon on a Thursday. They land on the side of the Moon facing away from the Earth. On wh...

**finite MAth**

dent who wants to buy 3 CDs, but assume that there are 4 CDs featuring the piano, 6 CDs featuring the trumpet, and 7 CDs featuring the saxophone. (1) In how many different ways can the 3 CD's be selected? (2) In how many ways can the selection be made if CD's featuring...

**finite MAth**

Assume that the student has a cup with 14 writing implements: 7 pencils, 5 ball point pens, and 2 felt-tip pens. (1) In how many ways can the student select 8 writing implements? (2) In how many ways can the selection be made if no more than one ball point pen is selected?

**Finite MAth**

Assume that the committee consists of 5 Republicans and 7 Democrats. A subcommittee consisting of 6 people is to be selected. (1) How many such subcommittees are possible if each subcommittee must contain exactly 3 Republicans and 3 Democrats? (1) How many such subcommittees a...

**Finite MAth**

Assume that you have 6 different types of vegetables and 9 different types of fruit. A vegetable salad consists of a mixture of any 3 types of vegetables, and a fruit salad consists of a mixture of 3 kinds of fruit. (1) In how many different ways can you prepare a vegetable sa...

**Finite MAth**

Assume that the set S has 7 elements. How many subsets of S have at most 3 elements

**Business Finance**

Cassandra is repaying an installment loan of $3500 with 20 equal monthly payments of $196 each. What is the annual percentage rate of the loan?

**chem**

How many grams of iron metal do you expect to be produced when 245 grams of an 80.5 percent by mass iron (II) nitrate solution reacts with excess aluminum metal? Show all of the work needed to solve this problem. 2 Al (s) + 3 Fe(NO3)2 (aq) 3 Fe (s) + 2 Al(NO3)3 (aq)

**chem**

How many grams of a stock solution that is 87.0 percent H2SO4 by mass would be needed to make 200 grams of a 35.5 percent by mass solution? Show all of the work needed to solve this problem

**chem**

How many moles of glucose (C6H12O6) are in 1.6 liters of a 0.75 M C6H12O6 solution?

**chem**

How many moles of sodium chloride (NaCl) solute are in 155 grams of an 85.5 percent by mass solution?

**chem**

How many grams of zinc metal will react completely with 8.2 liters of 3.5 M HCl? Show all of the work needed to solve this problem. Zn (s) + 2 HCl (aq) ZnCl2 (aq) + H2 (g)

**chem**

Describe, in detail, how to make 3.0 liters of a 3.5 molar HCl solution from an 18.5 molar HCl stock solution.

**10th chem**

Describe, in detail, how to make 3.0 liters of a 3.5 molar HCl solution from an 18.5 molar HCl stock solution.

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