Thursday

April 24, 2014

April 24, 2014

Total # Posts: 866

**Statistics**

An accelerated life test on a large number of type-D alkaline batteries revealed that the mean life for a particular use before they failed is 19.0 hours. The distribution of the lives approximated a normal distribution. The standard deviation of the distribution was 1.2 hours...

**Statistics**

You take a trip by air that involves three independent flights. If there is an 67% chance each specific leg of the trip is on time, what is the probability all three flights arrive on time? (Round your answer to 3 decimal places.) Probability= ? My answer is 0.301 3 decimal pl...

**Statistics **

A survey of top executives revealed that 37% of them regularly read Time magazine, 21% read Newsweek and 38% read U.S. News & World Report. Eleven percent read both Time and U.S. News & World Report. What is the probability that a particular top executive reads either Time or ...

**Statistics**

You take a trip by air that involves three independent flights. If there is an 67% chance each specific leg of the trip is on time, what is the probability all three flights arrive on time? (Round your answer to 3 decimal places.) Probability=

**Statistics**

A survey of top executives revealed that 37% of them regularly read Time magazine, 21% read Newsweek and 38% read U.S. News & World Report. Eleven percent read both Time and U.S. News & World Report. What is the probability that a particular top executive reads either Time or ...

**Statistics**

Thank you

**Statistics**

The National Center for Health Statistics reported that of every 894 deaths in recent years, 25 resulted from an automobile accident, 185 from cancer and 309 from heart disease. What is the probability that a particular death is due to an automobile accident? 25/309 or 0.081 2...

**Chemistry**

Complete ionic equation and net ionic equation for 2 K3PO4 + 3 Fe(NO3)2 --> 6 KNO3 + Fe3(PO4)2

**Chemistry**

CIE and NIE for 2 K3PO4 + 3 Fe(NO3)2 --> 6 KNO3 + Fe3(PO4)2

**CHemistry**

SO2(g) + H2O(l)= H2SO(l) What mass of sulfur dioxide is needed to prepare 36.86 g of H2SO3(l)

**Chemistry**

CIE and NIE for 2 K3PO4 + 3 Fe(NO3)2 = 6 KNO3 + Fe3(PO4)2

**physics**

How long will it take a watch dropped from a bridge (20.3 meters above the water) to hit the water?

**grammar**

Thank you Writeacher

**grammar**

In The Space Before Each of the Following items, place a C if the capitalization is correct, a zero (0) if it is incorrect. Then insert capitals where should be, and draw a line through capitals that should be small letters. 1.the Rocky Mountains i got C 2.my spanish course i ...

**Calculus Check my answer **

Find the area between the curves y= x^2/2 +2 and y = –x – 3 on the interval –4 ≤ x ≤ 4. I got 40/3 is that correct?

**Calculas**

Find the area of the region under the curve y = 12 e ^{3 x} between x = -2.6 to x =2.6

**Calculas**

The slope of the tangent line to the graph of a function, h(t) is 7/2t The function passes through the point (5,3) Find h(4)

**IT**

Write a program that asks for the name of the employee, an hourly pay rate and hours worked. Compute gross pay (hours X rate), withholding tax, and net pay (gross pay minus withholding tax). Withholding tax is computed as a percentage of gross pay based on the following: Gross...

**physics**

Drag-race tires in contact with an asphalt surface have a very high coefficient of static fric.tion. Assuming a constant acceleration and no slipping of tires, estimate the coefficient of static friction needed for a drag racer to cover 2.1 km in 8 s, starting from rest. Coeff...

**physics**

A person stands on a bathroom scale on a motionless elevator. When the elevator begins to move, the scale briefly reads 200 percent of the person's regular weight. Calculate the acceleration of the elevator, a_{elevator}. Use SI units

**Middle School Math Help Please**

You have a glass of juice in front of you, and you drink 1/6 of it. Then you pour as much water into the glass as you drank of the juice. Your drink 1/3 of this mixture and again you pour as much water into the glass as you drank of the mixture. Now you drink 1/2 of the conten...

**calculas**

Consider the function f(x) = 7 xe^{-7.5 x}, 0<_x<_2. This function has an absolute minimum value equal to: which is attained at x=

**calculas**

A landowner wants to fence in a rectangular area of 60000 square metres and divide it into three parts with two parallel fences both parallel to one side of the rectangle. Each part will have a different grazing crop for the herds. What is the shortest total length of fence th...

**Physics**

Your potato gun has a muzzle velocity of 34 m/s. You want to shoot a potato and have it strike the ground 2.4 seconds later. At what elevation do you have to fire the gun?

**physics**

thanks henry..... dont know why i didnt see that earlier

**Health**

10. Which of the following sentences should not be used in "I" messages? (Choose 2) A) You make me feel humiliated when you criticize me. B)It's hard for me to think clearly when you are singing. C)I would like us to leave on time in the future. D)I do not like ...

**Physics**

An object moving along a horizontal track collides with and compresses a light spring (which obeys Hooke's Law) located at the end of the track. The spring constant is 38.6 N/m, the mass of the object 0.270 kg and the speed of the object is 1.20 m/s immediately before the ...

**Physics **

At a given temperature O2 molecules will move (3/2)1/2 faster than O3 molecules on the average. True or False? I'm not sure if it is true or false on this one, but I think its false. If you mix a gas, eventually all the molecules have the same kinetic energy on the average...

**math**

$120

**Chemistry**

At 1 atm, how much energy is required to heat 35.0 g of H2O(s) at –12.0 °C to H2O(g) at 127.0 °C?

**CHemistry**

At 1 atm, how much energy is required to heat 35.0 g of H2O(s) at –12.0 °C to H2O(g) at 127.0 °C?

**Math**

None especially from Steve!

**Math**

Suppose Meagan needs to drive the truck 10 miles to her new home. a) What is the cost of using Truck A? b) What is the cost of using Truck B? c) Which company offers the better deal at this mileage? 2. Suppose Meagan needs to dive the truck 30 miles to her new home. a) What is...

**science check my answers? **

A car travels around a circular turn of radius 50 meters while maintaining a constant speed of 15 m/s. Find the minimum value for the coefficient of friction necessary to keep the car on the road. I got .40 for the minimum value of friction. In icy conditions, the coefficient ...

**business analytics**

Ill be concise:60% of people in survey had income greater than 25k, 40% under 25k. Further, same survey, 70% have exactly 2 cars, while 30% have a different number than 2. The probability that the residents own 2 cars IF income is over 25k is 80%. what is the probability of a ...

**Business Math and Statistics**

Ill be concise:60% of people in survey had income greater than 25k, 40% under 25k. Further, same survey, 70% have exactly 2 cars, while 30% have a different number than 2. The probability that the residents own 2 cars IF income is over 25k is 80%. what is the probability of a ...

**math**

Lucy earns $326.87 each week. The federal government withholds 18% of that for federal income tax. How much is withheld from her pay annually for federal income tax?

**Calculus**

Find the point on the line -6 x + 5 y - 1 =0 which is closest to the point ( -4, 1 )

**Calculus Help!!!**

Find c > 0 such that the area of the region enclosed by the parabolas y=x^2-c^2 and y=c^2-x^2 is 13.

**accounting**

Harry and Sally were divorced three years ago. In July of the current year, their son, Joe, broke his arm falling out of a tree. Joe lives with Sally and Sally claims him as a dependent on her tax return. Harry paid for the medical expenses related to Joe’s injury. Can Ha...

**Science**

How many grams are in 3CuCl2

**Science**

How many grams are in 3CuCl2

**physics **

A thermal neutron beam of intensity 1 to the power 11, neutrons/sec is directed for 2 days into a cavity in a block of cobalt initially composed entirely of the stable isotope Cobalt 59. The neutrons are all captured, producing cobalt 60 nuclei which are radioactive with a hal...

**physics **

A nuclear reactor for producing neutron beams is refuelled with about 10 kg of uranium, which contains initially 90% of the fissile isotope 235U. The reactor operates continuously at a constant thermal power of 57 MW until the quantity of 235U is reduced by 30%, at which point...

**Physics**

A nuclear reactor for producing neutron beams is refuelled with about 10 kg of uranium, which contains initially 90% of the fissile isotope 235U. The reactor operates continuously at a constant thermal power of 57 MW until the quantity of 235U is reduced by 30%, at which point...

**Physics**

A car is driving along at 16 m/s, and the rain is falling at 6 m/s straight down. What angle θ (in degrees) does the rain make with respect to the horizontal as observed by the driver?

**Chemistry**

MnO4 + (C2O4)2 = MnO2 + 2(CO3)2

**Statistics**

The weight of a bag of corn chips is normally distributed with a mean of 22 ounces and a standard deviation of 0.5 ounces. -The probability that a bag of corn chips weighs more than 21 ounces is? -The probability that a bag of corn chips weighs between 20.75 and 23.25 ounces is?

**Physics**

A cart of mass m1 = 12 kg slides down a frictionless ramp and is made to collide with a second cart of mass m2 = 21 kg, which then heads into a vertical loop of radius 0.26 m, but the carts stick together after the collision.Find the height h from which cart 1 would need to st...

**Physics**

A cart of mass m1 = 12 kg slides down a frictionless ramp and is made to collide with a second cart of mass m2 = 19 kg, which then heads into a vertical loop of radius 0.23 m. Determine the height h from which cart 1 would need to start to make sure that cart 2 completes the l...

**Physics**

A vintage sports car accelerates down a slope of θ = 16.6°. The driver notices that the strings of the fuzzy dice hanging from his rear-view mirror are perpendicular with respect to the roof of the car. What is the acceleration of the car?

**Organic Chemistry **

What reagents will separate, isolate, and purify 50% phenanthrene, 40% methyl 4-aminobenzoate, and 10% 1,4-dibromobenzene? The reagents to chose from are: 1 M naoh, 6 M naoh, 1 M hcl, 6 M hcl, 1 M nahco3, saturated sodium chloride, diethyl ether, 95% ethanol, methanol, isoprop...

**math**

Did you mean: ryan has nine 14 ounce bags of popcorn to repackage and sell at the school fair. a small bag holds 3 ounces. how many small bags can he make?

**physics**

A jogger follows this route every morning. Assume each segment is a straight line. A= 1000m due south B= 500m at 53 degrees east of south C= 400m due east What is the jogger's displacement from start to end including magnitude and direction?

**statistics**

A machine is designed to fill jars with 16 ounces of coffee. A consumer suspects that the machine is not filling the jars completely. A sample of 8 jars has a mean of 15.6 ounces and a standard deviation of 0.3 ounce. Is there enough evidence to support the consumer's conj...

**eth/125**

Thank you

**eth/125**

Which of the following types of people would be unlikey ro do much to change themselves? A. The fair wheather liberal b.the all wheather liberal c.the timid bigot d.all of these

**Physics**

A 170 kg astronaut (including space suit) acquires a speed of 2.75 m/s by pushing off with his legs from a 2400 kg space capsule. What is the average change in speed in meters/second of the space capsule?

**Statistics**

In the Federal Trade Commission (FTC) \Price Check" study of electronic checkout scanners, the FTC inspected 1,669 scanners at retail stores and supermarkets by scanning a sample of items at each store and determining if the scanned price was accurate. The FTC gives a sto...

**Calculus Help**

I have looked high and low to figure out how to start this question. I have no clue! Any help would be great!! Rainbows are formed when light strikes raindrops and is reflected and refracted. The Law of Refraction states that (sin alpha)/(sin beta) = k, where k equals 1.33 (fo...

**math**

Solve: f(x)=7x^6=1

**Programming Logic**

How do I write case logic pseudocode and visual logic nested if-then-else flow charts for atm check balances, making remote photo capture check deposits, and perform balance transfers?

**Calulus**

Use the Midpoint Rule with n =3 to approximate the integral ç−1−8(10x−9x2)dx

**calc**

15. Given ensuing information, determine the least cost and the least cost mix of on- and off-shore pipe. • • • • The intake facility is in the water 2 miles vertically north of the shoreline The water filtration plant is on land 1 mile vertically south of ...

**math**

Three forces act on a hockey pick as it slides across the ice; the normal force N represents the force the ice exerts upward on the puck and is given by N= <0,0,100>, the gravitational force G represents the downward force of gravity on the puck and is given by G = <0...

**algebra 1**

Given the data, you should get a piece of graph paper (or use excel or some other graphing program) and plot the points with time on the x-axis and temperature on the y-axis. You will probably get a graph that looks something like this: |....\ |.....\ |......\ |.......\ |........

**science**

Which ore could produce a metal you would like to wear? Why?

**Calculus**

Consider the function f(x)=4(x−3^2/3. For this function there are two important intervals: (−‡,A) and (A,‡) where A is a critical number. Find A

**algebra1**

solve the following system of equations by first rearranging them so that they are not in fractional form: 3/(x+2) -2/(x+3)=7y/(3x^2+15x+18) 4(y+3) +1/(y+1)= 11x/(Y^2+4y+3) oh please help oh please my math teach will funk me if i dont get these problem porrect.

**algebra1**

solve the following system of equations by first rearranging them so that they are not in fractional form: 3/(x+2) -2/(x+3)=7y/(3x^2+15x+18) 4(y+3) +1/(y+1)= 11x/(Y^2+4y+3)

**algebra1**

the school bought a new copy machine which makes 20 copies per minute.the old machine makes 12 copies per minute.francine needs 1000 copies,so she uses both machines.how long will it take to have the copies

**Math**

Adam wants to compare the fractions 2/5, 1/6, and 1/3. He wants to order them from least to greatest and rewrite them so they all have the same denominator. Explain how Adam can rewrite the fraction.

**math**

The median score on a test is 90. Is it possible to add two more scores to the data and still have a median score of 90? Explain your answer.

**Aviation structures**

during landing the leg is subjected to a vertical load of 10,000N, and a drag load 3000N,

**7th grade math**

How many times larger is a cube than a pyramid with the same base?

**7th grade math**

How many times larger is a cube than a pyramid with the same base?

**Chemistry**

An unknown amount of gas occupies 30.0 L at 2.1 atm and 298K. How many moles does the sample contain? What is the mass if the gas is helium? What is the mass if the gas is argon?

**Chemistry**

If N2 is added to a balloon that contains O2 (partial pressure 450 mm Hg) and CO2 (partial pressure 150 mm Hg) to give a total pressure of 850 mm Hg, what is the partial pressure of each gas in the final mixture?

**Chemistry**

Using the given boiling points, predict which compound has the higher vapor pressure at a given temperature. A. ethanol (C2H6O, bp 78 degrees C) or 1-propanol (C3H8O, bp 97 degrees C) B. hexane (C6H14, bp 69 degrees C) or octane (C8H18, bp 125 degrees C)

**Chemistry**

How many liters are in .005 moles?

**Chemistry**

How much energy in kilocalories is needed to vaporize 255g of water? The heat of vaporization of water is 540 cal/g.

**Chemistry**

If N2 is added to a balloon that contains O2 (partial pressure 450 mm Hg) and CO2 (partial pressure 150 mm Hg) to give a total pressure of 850 mm Hg, what is the partial pressure of each gas in the final mixture?

**Chemistry**

An unknown amount of gas occupies 30.0 L at 2.1 atm and 298K. How many moles does the sample contain? What is the mass if the gas is helium? What is the mass if the gas is argon?

**Chemistry**

What volume does 3.01 x 10^21 molecules of N2 occupy at STP?

**Finite**

r+e3

**managerial acct**

Need help with this problem. Please show me how to work this one: The level of inventory of a manufactured product has increased by 8,000 units during a period. The following data are also available Unit manufacturing costs of the period: Variable: $24 Fixed: $10 Unit operatin...

**physics**

A rubber band has a"spring constant" of 45 N/m. When the rubber band is pulled by a force of 9.8 N , how far will it stretch and what is potential energy?

**math**

15 - (2 x 2) x 3

**Math**

Emma solved this expression. (15 - 13) x 6 = 1 2 x 7 14 What was her error? Explain.

**Math**

You have 192 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side along the river, find the length and width of the plot that will maximize the area. Find the largest area that can be covered and the length of each side

**Math**

The average snowfall each winter at a ski resort is 12 feet. Last winter the resort received 16 feet of snow. What was the percent of increase compared to the average price? Justin works as a car salesman. Last week he had a total of 42000 dollars in his sales. If his commissi...

**Math**

the snowfall and the car salesman . Please

**Math**

After sales tax is added the total cost of 58.00 dollars purchade is 61.48 dollars What is the sales tax rate on the purchase? The bill at a restaurant is $59.29. Estimate the amount to leave for a tip of 15% The average snowfall each winter at a ski resort is 12 feet. Last wi...

**Physics**

A dart gun is located 1 meter above the floor and is fired horizontally. the dart travels a horizontal distance of 4 meters when it hits the floor. what is the initial velocity if the dart when fired?

**Chemistry**

A certain reaction has an activation energy of 25.65 kJ/mol. At what Kelvin temperature will the reaction proceed 5.50 times faster than it did at 291 K?

**Physics**

A block weighing 5.7 N requires a force of 2 N to push it along at constant velocity. What is the coefficient of friction for the surface?

**Math**

Chris deposited $1,500 in a bank account for 2 years. The account earned $120.00 in simple interest. What simple interest rate did he receive?

** Math**

Adam used 3/12, 1/6, and 1/3 to make a circle graph and colored each a different color. What fraction of the graph is not colored? Explain your answer.

**Math**

Adam wants to compare the fractions 3/12, 1/6, and 1/3. He wants to order them from least to greatest and rewrite them so they all have the same denominator. Explain how adm can rewrite the fractions.

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Next>>