Saturday

May 30, 2015

May 30, 2015

Total # Posts: 54

**algebra**

Mr. Smith has 100 students in his Algebra classes. The grades of a quiz are normally distributed with a mean of 70 and a standard deviation of 4. Sally claims that 75 students scored between 66 and 74 on this quiz. Given that this is normally distributed, is Sally correct? ...
*March 1, 2015*

**physics**

Two carts are involved in an elastic collision. Cart A with mass 0.55 kg is moving towards Cart B with mass 0.55 kg, which is initially at rest. Cart A stops after the collision and Cart B begins to move. What is the final kinetic energy of Cart B?
*February 23, 2015*

**algebra 2**

A skier has decided that on each trip down a slope, she will do 2 more jumps than before. On her first trip she did 6 jumps. Derive the sigma notation that shows how many total jumps she attempts from her fourth trip down the hill through her twelfth trip. Then solve for how ...
*October 20, 2014*

**Math**

A heated piece of metal cools according to the function c(x)=(.5)^(x−9), where x is measured in hours. A device is added that aids in cooling according to the function h(x)=−x−2. What will be the temperature of the metal after five hours? -7 Degrees Celsius 6...
*October 8, 2014*

**Math**

If Joe wanted to create a function that modeled an exponential function with base of 8 and what exponents were needed to reach specific values, how would he set up his function? f(x) = x^8 f(x) = log8 x f(x) = logx 8 f(x) = 8^x
*October 8, 2014*

**Math**

What is the logarithmic function modeled by the following table? x f(x) 8 3 16 4 32 5 f(x) = logx 2 f(x) = log2 x f(x) = 2 log10 x f(x) = x log10 2
*October 8, 2014*

**PHYSICS**

A conductor of length 0.5m moves in a uniform magnetic field of flux density 2 wbm^2. at a uniform velocity of 40m/s. Calculate the induced EMF under the following conditions: (1) the conductor moves at right angle to the magnetic field (2) the conductor moves at an angle of ...
*July 26, 2014*

**algebra**

(2x)^-6
*March 17, 2014*

**algebra**

(-2x)-6
*March 17, 2014*

**Maths**

Assume that the population of India is 120 million. If 40.25% of the population has height below 5 ft. and 30.76% of the population has height between 5 and 5.5 ft. Find how many people have height greater than 5.5 ft., rounding off your result to 2 decimal places
*November 21, 2013*

**Physics**

If you simultaneously drop a pair of tennis balls from the top of a building, they strike the ground at the same time. If one of the tennis balls is filled with lead pellets, will it fall faster and hit the ground first? Which of the two will encounter more air resistance?
*September 15, 2013*

**PHYSICS/SCIENCE**

If a Mack truck and a motorcycle have a head-on collision, upon which vehicle is the impact force greater? Which vehicle undergoes the greater change in its motion? Defend your answers.
*September 15, 2013*

**Physics**

If a Mack truck and a motorcycle have a head-on collision, upon which vehicle is the impact force greater? Which vehicle undergoes the greater change in its motion? Defend your answers.
*September 15, 2013*

**chemistry**

When does a chemical become a drug?
*May 5, 2013*

**MATH**

2(7w-1w+7)>122 ? what work would i do? im just learning inequalties and i have a quiz tomorrow with problems like this, please help!
*February 6, 2013*

**English**

I have to change the following sentence from passive voice to active voice and I'm having a hard time. Academic performance is influenced by peer pressure due to socializing negatively, lowering grades, and not staying on task.
*December 11, 2012*

**Chemistry**

No this is homework not an exam
*December 6, 2012*

**Chemistry**

The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2 . The reaction is second order in AhF. The value of the rate constant is 8.591x10-3 M-1s-1. What is the initial rate of reaction in a reactor filled with AhF to a ...
*December 6, 2012*

**math**

The dance company has a $10 cover charge, an average of 200 people will attend. For each $0.25 increase in admission price, the average number attending decreases by 1. What should the owner charge in order to make the most money? what is the maximum money that can be earned?
*November 24, 2012*

**Math**

Please help me, I'm having a hard time setting up this problem. George can plant a garden in 2 hours, and it takes Joyce 3 hours. They work together for 45 mins, and George leaves and Joyce finishes the job alone. How long does it take Joyce to finish planting the garden?
*October 30, 2012*

**Math**

Please help me, I'm having a hard time setting up this problem. George can plant a garden in 2 hours, and it takes Joyce 3 hours. They work together for 45 mins, and George leaves and Joyce finishes the job alone. How long does it take Joyce to finish planting the garden?
*October 30, 2012*

**physics**

There is a legend of a Dutch boy who bravely held back the whole Atlantic Ocean by plugging a hole in a dike with his finger. Is this possible and reasonable? Estimate the force if the hole were about 1.5 square centimeter in area and 1.8 meter below the water level.
*May 14, 2012*

**Math 8th Grade**

I would greatly appreciate it if someone would please be kind enough to take the time and show me how to work these problems. Thank you very much Solve by finding y and graph using the slope and y-intercept: 3x-y=1(My answer -y=3x+1)which is wrong could not graph it. x-y=3 (My...
*May 12, 2012*

**Math**

I don't understand the part of "nearest tenth of a foot". My answer is 114.61 but I don't get the part above mentioned.
*February 27, 2012*

**Math**

The largest tree in the world is the General Sherman sequoia in Sequoia National Park, California. It is 275 feet high, has a diameter of 36.5 feet, and has an estimated weight of 2,150 tons. Fin the sequoia's circumference to the nearest tenth of a foot. Use 3.14
*February 27, 2012*

**Math**

Jason makes two pictures. Picture 1 is made with the help of a pencil and picture 2 is made with the help of a pencil, compass, and protractor Which statement best compares the two Answer: A:Picture 1 is a drawing because it does not use measuring tools and Picture 2 is a ...
*October 3, 2011*

**geomtry**

Martin and Patrick have a model of an airplane which they want to duplicate. Martin uses a string and ruler to make approximate measurements of lengths to duplicate the picture. Patrick uses a pencil and paper and duplicates the picture without the help of tools. Which ...
*September 30, 2011*

**math**

Lara wrote the statements shown in the chart. Statement One: If two lines intersect, then they intersect at exactly one point Statement Two: In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the length of the legs. Which ...
*September 29, 2011*

**geometry**

Alice is making the profile of a face. She is also making an exact replica of a circle with a radius of eight inches. Which statement is correct about the profile and the replica?Answer A: The profile is made by sketching and the circle is made by drawing. B: The profile is ...
*September 26, 2011*

**chemistry **

What would be the result if 5.0 L of hydrogen was burned with 2.0 l of oxygen in a closed container?
*September 21, 2011*

**phisic**

Treating air as an ideal gas of diatomic molecules, calculate how much heat is required to raise the temperature of the air in an 7.47 m by 14.9 m by 2.87 m room from 19.9°C to 21.7°C at 101 kPa. Neglect the change in the number of moles of air in the room
*May 3, 2011*

**Math**

Simplify I came up with 5.5 (15x^5-21x^4+21x^2)/(3x^2 ) not sure if I did this the correct way it just doesn't seem right at all.
*April 16, 2011*

**physics**

Suppose 0.0150 kg of steam (at 100.00°C) is added to 0.150 kg of water (initially at 19.3°C.). The water is inside a copper cup of mass 54.1 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside environment. Find the ...
*April 5, 2011*

**physics**

For a class demonstration, your physics instructor pours 1.16 kg of steam at 100.0°C over 4.69 kg of ice at 0.0°C and allows the system to reach equilibrium. He is then going to measure the temperature of the system. While the system reaches equilibrium, you are given ...
*April 5, 2011*

**physics**

Water is flowing in a pipe as depicted in the figure. As shown, p = 117 kPa, d = 4.67 cm, d' = 3.06 cm, v = 4.36 m/s, and h = 1.11 m. What pressure is indicated on the upper pressure gauge? Take y = 0 at the bottom of the left pipe so that the center of the left pipe is y1...
*March 26, 2011*

**Physics**

how do i find the volume of a block of platinum weighing 45.5 kilos
*January 9, 2011*

**CHEMISTRY**

CAN someone please point me in the right direction I am trying to find a complete list of all of the ate Oxyanions because I need to memorize them and can't find a complete list of them like sulfate nirtate phosphate carbonate... can someone provide a complete list I can&#...
*September 10, 2010*

**MATH**

A radio tower 500 feet high is located on the side of a hill with an inclination to the horizontal of 5 degrees. How long should two guy wires be if they are to connect to the top of the tower and be secured at two points 100 feet directly above and directly below the base of ...
*February 16, 2010*

**algebra**

a car sells for $25000. if the rate depreciation is 15% what is the value of the car after 7 years
*February 9, 2010*

**finance**

a car sells for $25000. if the rate depreciation is 15% what is the value of the car after 7 years
*February 9, 2010*

**algebra**

thanks i cant believe its that easy and i was real confused
*October 8, 2009*

**algebra**

what would [5-2]+-7-(-9)= what would be my specific steps
*October 8, 2009*

**finance**

on may 12, Scott accepted an $8000, 12%, 90 day note for a time extension of a bill for goods bought by ron. On june 12, scott discounted the note at able bank at 10% What proceeds does scott receive
*March 15, 2009*

**math**

Ron bought goods from shelly katz. On may 8, shelly gave ron a time extension on his bill by accepting a $3000, 8%, 180 day note. On august 16, shelly discounted the note at Roseville bank at 9% what proceeds does shelly rerceive?
*March 15, 2009*

**math**

on may 12, Scott accepted an $8000, 12%, 90 day note for a time extension of a bill for goods bought by ron. On june 12, scott discounted the note at able bank at 10% What proceeds does scott receive
*March 15, 2009*

**9th grade math**

Hey i need help on my math hw i just dont get it lol please help me! Here the questions Which of the following equations has a graph that is parallel to the graph of 4x-2y=7? A:-2y = 4x+2 B:7-4x=2y C:4x+2y=2 D:-4x-2y=-7 E:2y=4x+7 Determine if the two lines 7x+5y=35 and y= -7 ...
*March 1, 2009*

**Grammar**

thank you so much!!
*November 29, 2008*

**Grammar**

so is #1 complex? because that is the only choice left.
*November 29, 2008*

**Grammar**

Indentify each sentence below with Simple, compound, complex, or compound-complex. Could you pleas tell me if these are correct? 1. After they defeated Germany in World War II, the Allies divided Germany and its capital city, Berlin, into four sectors: a British sector, a ...
*November 29, 2008*

**english**

analogies....1.achievement:admiration:_______:sympathy......2.brave:reckless:curious:_______
*September 24, 2008*

**NUTRITION**

thank you but, do you know more about this that you can tell me?
*November 21, 2007*

**NUTRITION**

WHICH IS THE MOST COMMON FOOD IN USA?
*November 21, 2007*

**social studies**

Can you tell me what kinf of food does the american people ate in the past?
*November 21, 2007*

**social studies**

U.S.A old diet-food
*November 21, 2007*

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