Friday

May 6, 2016
Total # Posts: 202

**math**

Find an equation of the line that satisfies the given conditions. through (2, 4) perpendicular to x − 4y + 7 = 0 I know that you would set it up as -4y = -x - 7, but would you divide the 4 to get slope = (1/4)x, which would make the perpendicular slope 4?
*January 29, 2016*

**math**

Find an equation of the line that satisfies the given conditions: through (2, 4), perpendicular to x − 4y + 7 = 0.
*January 27, 2016*

**Pre Algebra**

My problem is evaluate the expression -1 11/16 - (-4 1/6)? 1) -27/16 + 25/6 = -81/48 + 200/48 = 119/48 = 2 23/48 2) -1 33/48 + 4 8/48 = 3 41/48 Have to do it two ways, why can't I get the same answer. What am I doing wrong? Thank you very much
*January 26, 2016*

**math**

Let f(x) = 2x/(x^2+9). Find the domain of f. Write your answer using interval notation.
*January 21, 2016*

**geometry**

The circle in the figure below has radius r. What is its equation in standard form?
*January 20, 2016*

**Geometry**

mx^2+12x+9m=0. for what values of m will the equation have one repeated root? I can't remember how to calculate double root values
*December 7, 2015*

**physics**

A laser with a power output of 2 mW at a wavelength of 400 nm is projected onto a calcium metal surface. What power is carried away by the electrons? The binding energy of the metal is 2.31 eV.
*November 27, 2015*

**physics**

On its highest power setting, a microwave oven increases the temperature of 0.400 kg of spaghetti by 45.0 °C in 120 s. The specific heat of spaghetti is 3760 J/kg °C and the microwaves are absorbed over a circular area 20.0 cm in diameter. What is the peak electric ...
*November 27, 2015*

**physics**

A severely myopic patient has a far point of 5.00 cm. By how many diopters should the power of his eye be reduced in laser vision correction to obtain normal distant vision for him? Assume the image at the back of the eye is formed 0.2 m from the eye's lens.
*November 27, 2015*

**physics**

An ECG monitor must have an RC time constant less than 100 μs to be able to measure variations in voltage over small time intervals. If the resistance of the circuit (due mostly to that of the patient’s chest) is 1000 Ω, what is the maximum capacitance of the ...
*November 15, 2015*

**physics**

An electrostatic paint sprayer has a 0.200-m-diameter metal sphere at a potential of 25.0 kV that repels paint droplets onto a grounded object. What charge must a 0.100-mg drop of paint have to arrive at the object with a speed of 10.0 m/s?
*November 9, 2015*

**physics**

Lunar astronauts placed a reflector on the Moon’s surface, off which a laser beam is periodically reflected. The distance to the Moon is calculated from the round trip time. The taken for the laser pulse to travel there and back again can be measured to 0.1 ns. What ...
*November 8, 2015*

**physics**

A heart defibrillator passes 10.0 A through a patient’s torso for 5.00 ms in an attempt to restore normal beating. Find the temperature increase caused in the 8.00 kg of affected tissue if all the energy heats up the tissue with a specific heat capacity of 3000 J kg-1 K-1.
*November 8, 2015*

**physics**

Alkaline batteries have the advantage of putting out constant voltage until very nearly the end of their life. How long will an alkaline battery rated at 1 A ⋅ h and 1.58 V keep a 1 W flashlight bulb burning?
*November 8, 2015*

**physics**

Alkaline batteries have the advantage of putting out constant voltage until very nearly the end of their life. How long will an alkaline battery rated at 1 A ⋅ h and 1.58 V keep a 1 W flashlight bulb burning?
*November 7, 2015*

**Physics**

Lunar astronauts placed a reflector on the Moon’s surface, off which a laser beam is periodically reflected. The distance to the Moon is calculated from the round trip time. The taken for the laser pulse to travel there and back again can be measured to 0.1 ns. What ...
*November 7, 2015*

**physics**

A heart defibrillator passes 10.0 A through a patient’s torso for 5.00 ms in an attempt to restore normal beating. Find the temperature increase caused in the 8.00 kg of affected tissue if all the energy heats up the tissue with a specific heat capacity of 3000 J kg-1 K-1.
*November 7, 2015*

**physics**

A circular wire is connected to a galvanometer. A solenoid is placed inside the circular wire. The solenoid has 520 turns per meter, a cross-sectional area of 0.007 m^2 and a current charge from 0A to 0.7A in 1.25 ms. The circular wire has a n are of 0.01m^2 and a resistance ...
*October 22, 2015*

**english**

Ms. Sue, sorry the question was to punctuate the following sentences correctly and write the formula you used: [s;s] or [s, conj s]
*October 15, 2015*

**english**

Dr.king was born on January 15, 1929 and he died on April 4, 1968.
*October 15, 2015*

**Math**

A rectangular prism has a volume of 256 cubic feet, what are the dimensions in feet of the prism?
*July 11, 2015*

**geometry**

i need to figure out side lengths of congruent right isosceles triangle with no lengths given. I know that the hypotenese is 1 per pythogoras constant and the area is a^2/2. I dont have to prove area just side lengths.
*May 21, 2015*

**Physics**

A 4 kg block is placed on an incline at an angle of 30 degrees. If the coefficient of static friction is 0.3 and the coefficient of kinetic friction is 0.2 what is the net force on the block?
*April 25, 2015*

**chemistry**

One mole of an ideal gas is expanded from a volume of 1.00 atm. How much work (in joules) is performed on the surroundings? Ignore sig figs for this problem. (T=300 K; 1 L*atm=101.3 J)
*April 14, 2015*

**physics**

You hold a hose 45 degrees to the horizontal and at a height of 1 m from the floor. The water reaches a maximum distance of 10 m from where you are standing. Now you place your thumb over the end of the hose to occlude the opening by 80%, which in turn reduces the flow rate by...
*April 7, 2015*

**physics**

Assume the muscle is 37C and is separated from the outside air by layers of fat and skin. The layer of fat, at a particular location on the skin, is 2 mm thick and has a conductivity of 0.53 W/mK. Finally, the outermost epidermal layer is 0.1 mm thick with a thermal ...
*April 7, 2015*

**Physics**

Assume the muscle is 37C and is separated from the outside air by layers of fat and skin. The layer of fat, at a particular location on the skin, is 2 mm thick and has a conductivity of 0.53 W/mK. Finally, the outermost epidermal layer is 0.1 mm thick with a thermal ...
*April 6, 2015*

**Physics**

You hold a hose 45 degrees to the horizontal and at a height of 1 m from the floor. The water reaches a maximum distance of 10 m from where you are standing. Now you place your thumb over the end of the hose to occlude the opening by 80%, which in turn reduces the flow rate by...
*April 6, 2015*

**Physics**

How far does water travel if you restrict the hose opening by 80%
*April 4, 2015*

**physics**

You hold a hose 45 degrees to the horizontal and at a height of 1 m from the floor. The water reaches a maximum distance of 10 m from where you are standing. Now you place your thumb over the end of the hose to occlude the opening by 80%, which in turn reduces the flow rate by...
*April 4, 2015*

**physics**

Assume the muscle is 37C and is separated from the outside air by layers of fat and skin. The layer of fat, at a particular location on the skin, is 2 mm thick and has a conductivity of 0.53 W/mK. Finally, the outermost epidermal layer is 0.1 mm thick with a thermal ...
*April 4, 2015*

**Physics**

In 2286, Admiral Kirk and his crew were forced to use the slingshot effect in a stolen Klingon Bird-of-Prey to travel back in time to the late 20th century to retrieve two humpback whales. The stolen Klingon Bird-of-Prey traveled towards the sun at a velocity of vs while the ...
*March 23, 2015*

**Physics**

Consider holding a carton of milk in your hand. The force of the bicep muscle actsat an angle of 15 degrees to the vertical, while the weight of the arm and the milk both act downwards. The distance from the elbow to where the bicep muscle is attached via the distal bicep ...
*March 23, 2015*

**physics**

A 1kg block of wood is moving with a velocity of 10 m/s on top of a table. The coefficient of kinetic friction between the block of wood and the table is 0.1. The block of wood is a cube with sides of 12 cm. How far does the block move before coming to a stop? If momentum is ...
*March 23, 2015*

**Physics**

Consider holding a carton of milk in your hand. The force of the bicep muscle actsat an angle of 15 degrees to the vertical, while the weight of the arm and the milk both act downwards. The distance from the elbow to where the bicep muscle is attached via the distal bicep ...
*March 19, 2015*

**Physics**

In 2286, Admiral Kirk and his crew were forced to use the slingshot effect in a stolen Klingon Bird-of-Prey to travel back in time to the late 20th century to retrieve two humpback whales. The stolen Klingon Bird-of-Prey traveled towards the sun at a velocity of vs while the ...
*March 19, 2015*

**Physics**

A 1kg block of wood is moving with a velocity of 10 m/s on top of a table. The coefficient of kinetic friction between the block of wood and the table is 0.1. The block of wood is a cube with sides of 12 cm. How far does the block move before coming to a stop? If momentum is ...
*March 19, 2015*

**Physics**

A projectile is launched from a compressed spring on an inclined plane. The spring constant of the spring is k= 10 N/m, the mass is 1kg and the plane is inclined 30 degrees to the horizontal. If the spring is compressed 15 cm what will be the velocity of the projectile when it...
*March 18, 2015*

**physics**

A skateboarder in a death defying stunt decides to launch herself from a ramp on a hill. The skateboarder leaves the ramp at a height of 1.4m above the slope, traveling 15m/s and at an angle of 40 degrees to the horizontal. The slope is inclined at 45 degrees to the horizontal...
*February 25, 2015*

**physics**

A skateboarder in a death defying stunt decides to launch herself from a ramp on a hill. The skateboarder leaves the ramp at a height of 1.4m above the slope, traveling 15m/s and at an angle of 40 degrees to the horizontal. The slope is inclined at 45 degrees to the horizontal...
*February 25, 2015*

**physics**

Tarzan is running towards a cliff, ready to swing down rescue Jane from some poisonous snakes, and make it back up to a tree on the other side. For now, we are going to assume energy is conserved and ignore momentum. If the height of the cliff is 10m, the height of the tree on...
*February 3, 2015*

**Physics**

Consider a modified Atwood machine, with a mass sitting on an inclined plane connected by a string which stretches over a pulley connected to a hanging mass. Friction is ignored. Draw a free body diagram for both blocks. Apply Newton's second law to both blocks. If the ...
*February 3, 2015*

**physics**

Tarzan is running towards a cliff, ready to swing down rescue Jane from some poisonous snakes, and make it back up to a tree on the other side. For now, we are going to assume energy is conserved and ignore momentum. If the height of the cliff is 10m, the height of the tree on...
*February 2, 2015*

**physics**

Consider the following system with a 2 kg mass sitting on a table, connected to both 1 kg and 3 kg masses by strings which go over two separate pulleys and are pulling on the 2 kg mass in opposite directions. What static friction coefficient would be required between the 2 kg ...
*February 2, 2015*

**physics**

Consider a modified Atwood machine, with a mass sitting on an inclined plane connected by a string which stretches over a pulley connected to a hanging mass. Friction is ignored. Draw a free body diagram for both blocks. Apply Newton's second law to both blocks. If the ...
*February 2, 2015*

**Algebra**

How many 12-inch square tiles are needed to completely cover the floor of a greenhouse that is 25 feet by 40 feet ?
*January 26, 2015*

**LSAT PREP**

A company employee generates a series of five-digit product codes in accordance with the following rules: The codes use the digits 0, 1, 2, 3, and 4, and no others. Each digit occurs exactly once in any code. The second digit has a value exactly twice that of the first digit. ...
*January 6, 2015*

**math**

could you please show me the steps to do this problem? 8 2/7-7 1/3
*December 9, 2014*

**L.A.Help!!!!!!**

Amanda is right i just took this
*November 17, 2014*

**Economics**

EconMacro4 Chapter 9 Aggregate Expenditures and Demand 7. A. What are the components of aggregate expenditure? Page 148 Add to the consumption function, investment, government purchases and net exports (C + I + G + (X-M). B. In the model developed in this chapter, which ...
*October 26, 2014*

**comp1**

Contrast/comparison on the Parent Trap and the Remake of the Parent Trap I need help asap.
*October 5, 2014*

**Math z-scores**

find the z-scores for which 92% of the distribution's area lies between -z and z
*September 30, 2014*

**Math 221**

A distribution center receives shipment of a product from three different factories in the quantities of 60, 30 and 20. Three times a product is selected at random, each time without replacement. Find the probability that (a) all three products came from the second factory and...
*September 15, 2014*

**Math 221 Week3**

A probability experiment consists of rolling a 6 sided die. Find the probability of the event below: rolling a number less than 3? The probability is
*September 15, 2014*

**Math 221 Week3**

A distribution center receives shipment of a product from three different factories in the quantities of 60, 35 and 25. Three times a product is selected at random, each time without replacement. Find the probability that (a) all three products came from the second factory and...
*September 15, 2014*

**math**

What will you use to measure a wall
*September 8, 2014*

**geometry**

Construction: The midpoint of a line segment can be constructed. Theorem: If the consecutive midpoints of the sides of a parallelogram are joined in order, then the quadrilateral formed from the midpoints is a parallelogram. Write an essay (suggested length of 2–4 pages, ...
*July 10, 2014*

**algebra**

how do you graph linear equation 2x= -10y and x+5y=3
*May 23, 2014*

**FIN1103-39**

You think in 15years, it will cost $214,000 to provide your child with a 4 year college education. Will you have enough if you take $75,000 today and invest it for the next 5 years with $1million
*April 27, 2014*

**Proximity, alignment, repetition and contrast**

Patterns and shapes that appear alike and are grouped together produce
*April 24, 2014*

**Composition **

How does taking observations obstruct or halt the writing process
*March 27, 2014*

**Math**

Yes. She actually can 33 1/3 boards.
*February 10, 2014*

**Interent Basics**

The social networking site tat caters to artists and musicians
*February 2, 2014*

**child development**

tyrone groups words with agent qualities as subjects and words with action qualities as verbs. he then merges these categories into sentences. tyrone is demonstrating?
*November 7, 2013*

**calculus**

i need help with proving five steps of l hospitals rule for (ex^2-1)/x
*October 30, 2013*

**Finance**

the cost in 15 years is 214,000 to provide a college education. Can I have enough to take $75,000 today and invest it for the next 15 years at 5%?
*October 27, 2013*

**american history**

. Which of the following was the primary cause of the Balkan Wars conducted during the Clinton administration? A. The rise to power of Slobodan Milosevic in Serbia B. Muslim activism in Bosnia C. The UN peacekeepers' inability to stem ethnic cleansing D. The breakup of the...
*October 6, 2013*

**History**

Which of the following statements about John D. Rockefeller is most accurate? A. He founded the Standard Oil Company when he was 24 years old. B. He considered competition to be the central ideal of capitalism. C. He drilled the first oil well near Titusville, Pennsylvania. D...
*September 29, 2013*

**Chemistry**

How many grams of MgO are produced during an enthalpy change of -96.0 KJ if 2Mg(s) + O2(g) -> 2MgO(s) and delta H= -1204kj
*August 13, 2013*

**social studies **

Is this answer right? my answer has ( ) around it The first fully developed American factory system emerged in the _______ industry. A. iron B. distilling C. sugarcane (D). textile
*July 30, 2013*

**social studies**

Thank you! I love this site.
*July 16, 2013*

**social studies**

I was wondering if this is right my answer has ( ) around it During Jefferson's presidency, cities were (A). mainly ports for international trade. B. mostly the haunts of thieves and degenerates. C. mainly industrial centers. D. mostly found along the Mississippi.
*July 16, 2013*

**social studies**

thank you so much my history book and the internet had me confused. I was torn in between answer C and answer A
*July 16, 2013*

**social studies**

my answer has ( ) around it With respect to the eighteenth century, the concept of the "middle ground" is helpful in A. understanding the attitudes of Indians living between the Appalachians and the Mississippi. B. explaining the attitudes and preferences of the ...
*July 16, 2013*

**social studies**

Thank you ^-^
*July 15, 2013*

**social studies **

Can someone tell me if this is correct my answer has ( ) around it The Articles of Confederation called for which of the following? A. The Northwest Ordinance B. A chief executive (C). A single legislative body D. The right of the legislature to assess taxes
*July 15, 2013*

**econ**

Congress' control over the Fed is a. substantial because it can cut off necessary appropriations b. limited because the Fed is not dependent on Congress for the funds to support its operations c. substantial because the members of the Board of Governors can be replaced ...
*May 27, 2013*

**econ**

Suppose the reserve requirement ratio is 20 percent. Assuming no bank holds excess reserves and nobody withdraws cash, a $10,000 injection of new excess reserves by the Fed can create A) $2,000 in new checkable deposits B) $10,000 in new checkable deposits C) $50,000 in new ...
*May 27, 2013*

**Chemistry**

Write a procedure to demonstrate the effect of higher concentrations of HCl on its rate of reaction with antacid tablets. I have HCl with a concentration of 1.0 mol/L. This is what I have so far. Are my concentrations correct for this procedure? E is my control and, a,b,c,d ...
*May 22, 2013*

**Computers**

Which of the following operating system types is used in medical equipment or a cash register? A. Multi-user/multi-tasking B. Real-time C. Single-user/multi-tasking D. Single-user/single-tasking
*May 22, 2013*

**math**

jim has grades of 84, 65, 76 on three tests. what grade must he obtain on the next test to have an average of exactly 80% for all four tests?
*April 27, 2013*

**Investments**

At the end of each year a self-employed person deposits $1,500 in a retirement account that earns 10 percent annually. a) How much will be in the account when the individual retired at the age of 65 if the contribution start when the person is 45 years old? b) How much ...
*April 25, 2013*

**ela**

"That suddenly above the bee is heard," Is this an example of sensory language? It pertains one of the 5 senses(hearing)so I'm assuming.
*March 21, 2013*

**Math**

The base of the skateboard ramp has an area of 2.3 m square meters the height of the ramp is 1.2 m find the volume of the rectangular prism? Help please
*March 5, 2013*

**Math 6th grade**

Help please!!:(
*March 5, 2013*

**Math 6th grade**

The base of the skateboard ramp has an area of 2.3 m square meters the height of the ramp is 1.2 m find the volume of the rectangular prism?Please help!
*March 5, 2013*

**physics**

A rigid rod holds a restaurant sign horizontally from the side of a building. The force due to gravity acting on the sign is 165N with the angle between the sign and the rod being 50 degrees. Ignoring the weight of the rod what is the magnitude of the tension in the rod?
*February 6, 2013*

**physics**

While sitting in a lounge chair with the back inclined at an angle of 10 degrees from the vertical, you tuck a pillow between your head and the chair. Then you lower the chair back to 40 degrees and doze with the pillow in place. How has the net force on the pillow changed?
*February 6, 2013*

**Physics **

A force of 5N and a force of 15N acting on an object can produce the following net forces except a. 20N b. 15N c. 10N d. 5N
*February 6, 2013*

**physics**

An objectis at rest on an incline. The component of gravity acting downward and along the incline on the object is described as Fg,x = +8.0N. Which axis is pointing up the incline? a. + x axis b. + y axis c. - x axis d - y axis
*February 6, 2013*

**physics**

Which of the following situations describes inertia? a. A stationary object tends to resist being moved. b. A moving object tends to resist a change in speed. c. A moing object tends to resist a change in direction d. all of the above
*February 6, 2013*

**physics**

Two forces act on an object. The magnitude of the net force acting on the object a. equals the sum of the magnitude of the two forces b. equals the difference in the magnitudes of the two forces c. equals the average of the two forces d. cannot be determined from the given ...
*February 6, 2013*

**physics**

Which of the following is true of inertia? a. It is described in Newton's first law of motion b. It is a property of motion c. It is measured by weight d. all of the above
*February 6, 2013*

**astronomy**

Assume that the mass of a sun-like star is 2.50 x 10^5 Earth masses and that its radius is about 101.0 times that of Earth. The density of Earth is about 5,500 kg/m^3. What is the density of this star?
*February 4, 2013*

**Statistics**

A quality control inspector wants to estimate the mean inside diameter of the washers produced by a certain machine. A preliminary sample indicates that the inside diameters have a standard deviation of 0.30 millimeters. What sample size does he need to estimate the mean to ...
*December 6, 2012*

**statistics**

The number of grams of carbohydrates in a 12-ounce serving of a regular soft drink is listed here for a random sample of sodas. Find the 99% confidence interval for the mean number of carbohydrates in all brands of soda. 48 37 52 40 43 46 41 38 41 45 45 33 35 52 45 41
*November 21, 2012*

**statistics**

The following data set gives FICO credit scores of a sample of 40 mortgage applicants to a local bank. (Note that the scores are in increasing order for your convenience.) 444, 497, 502, 517, 532, 559, 568, 598, 611, 636, 637, 657, 681, 681, 693, 698, 701, 708, 711, 713, 714, ...
*November 14, 2012*

**statistics**

I need help with p for a hypothesis test for normal distribution.
*October 20, 2012*

**Math**

two times the sume of 3 and y amounts to 24
*September 25, 2012*

**Algebra**

A.Driving from El Paso to San Antonia on a bus ...560 miles traveling at avg speed of 60 miles per hr how do I make a graph with the time & distance. B. have to estimate distance bus tvls in 2 hrs...2 3/4 hrs...3.5 hrs...7.25 hrs.. C.need to describe in words a rule you can ...
*August 27, 2012*