Friday

November 28, 2014

November 28, 2014

Total # Posts: 311

**Optics**

How to find critical angle using n?
*November 2, 2014*

**Algebra**

An herbalist has 40 oz of herbs costing $4 per ounce. How many ounces of herbs costing $1 per ounce should be mixed with these 40 oz of herbs to produce a mixture costing $2.20 per ounce? oz
*September 27, 2014*

**math **

the sum of my digits is 13, my hundredths place is 3 less than 5, my ones place is 4 more than 3, my thousands place is even, what 4-digit numbers can I be
*August 20, 2014*

**statistics**

Construct a 95% prediction interval for the number of hours of sleep for an adult who is 45 years old
*July 19, 2014*

**science**

At a murder scene, you have started making an image of a computer’s drive. You’re in the back bedroom of the house, and a small fire has started in the kitchen. If the fire can’t be extinguished, you have only a few minutes to acquire data from a 10 GB hard disk...
*July 16, 2014*

**math**

Thanks,now I totally understand
*July 5, 2014*

**math**

X+3y+9=0 and x+3y-7=0 are parallel or not ,how to work out,can anyone show me please
*July 5, 2014*

**math**

please represent algebraic express 20 less than 19 divided by 3X
*July 1, 2014*

**Maths**

Find the derivative of y=1/x at x=1/4 Answer: 1/1/16
*June 30, 2014*

**algebra**

The population of Arizona was 4.2 million in 2000 and 6.9 million in 2008. If the population grew exponentially, which one of the following models the population as a function of time (in years since 2000)?
*June 15, 2014*

**Physics **

Two masses are connected by a string over an ideal pulley as shown. The coefficient of kinetic friction between m1 and the table surface is 𝜇. Find an expression for their common speed after the blocks have moved a distance L. You can assume that you know: m1, m2, L, ...
*May 30, 2014*

**Physics**

0.2295
*May 27, 2014*

**Physics**

The flux density through a 200 turn coil of area 8.5*10^-4 m squared changes from 0.03 T to 0.12 T in 15 mins. Calculate the induced emf in the coil.
*May 27, 2014*

**Chemistry**

The motor is connected from it's battery and used as a generator.On the axes(vertical is amps and horizontal is time) show the type of current it provides when it is rotated through 2 complete revolutions
*May 27, 2014*

**algebra**

Suppose that state’s record high temperature of 102 was set in 1930, and the record low of -14 was set in 1966. What is the range of these temperature extremes?
*May 26, 2014*

**algebra**

Complete the table of solutions 7x-2y =-21 X Y (X,Y) 3 ---- (---- , ----) --- 0 (---,---)
*May 26, 2014*

**ALGEBRA**

How many inches of molding are needed to produce the square picture frame 13" 1/8
*May 25, 2014*

**ALGEBRA**

Complete the table of solutions 7x-2y =-21 X Y (X,Y) 3 ---- (---- , ----) ----- 0 (---,---)
*May 25, 2014*

**ALBEBRA**

INPUT ---------- OUTPUT X 2x-x/2 -10 -10
*May 25, 2014*

**ALGEBRA**

Suppose that state’s record high temperature of 102 was set in 1930, and the record low -14 of was set in 1966. What is the range of these temperature extremes?
*May 25, 2014*

**ALGEBRA**

In the table of solutions, which entry is the y-intercept of the graph and which entry is the x-intercept of the graph? x y (x, y) 4 0 (4, 0) 0 2 (0,2) –4 –4 (–4, –4)
*May 25, 2014*

**ALGEBRA**

A student inherited $4,200 and deposits x dollars in American Savings. Write an expression to show how much she has left to deposit in a City Mutual account.
*May 25, 2014*

**geometry**

if you add 10% to each side of a triangle what is the % of gain
*May 18, 2014*

**Math**

Admission to a museum cost $12 for adults and $7 for children. A group of 35 people attending the museum paid a total of $315 in admission fee. Write a system of equations to represent the situation. Let A represent the number of adults admissions and C represent the number of...
*March 25, 2014*

**Chemistry**

Alternative answers: A)10 B)13 C)1.9 D)3.8 E)12
*March 16, 2014*

**Science**

Determine the pkb of methylamine if the kb is 4.4*10^-4.
*March 16, 2014*

**Algebra**

what is the expression that is equivalent to -2(x-3)
*March 15, 2014*

**math**

I am helping my daughter and I need help on this question in the number 57,733 contains two sets of digits in which one digit is ten times as great as the other what are the values of the digits in each set help please!!!!
*February 15, 2014*

**math**

In the number 7,725 which places contain digits where one digit is ten times as great as the other ?
*February 15, 2014*

**math**

a quadrilateral has two angles that measure 88 and 62. the other two angles are in a ratio of 16:19. what are the measures of those two angles?
*January 27, 2014*

**MICROECONOMICS**

Explain the relationship between labor earnings and the distribution of income
*December 4, 2013*

**MICROECONOMICS**

How have insights from the field of psychology influenced the thinking of economists in recent years?
*December 4, 2013*

**MICROECONOMICS**

Explain the relationship between labor earnings and the distribution of income
*November 28, 2013*

**maths **

2/π ∫ π - 0 t^2 cos (nt) dt how to solve this anyone?
*October 5, 2013*

**MATH**

Chantal has a flower bed. She has three types of flowers, Daffodils, Hyacinths and Tulips. She has 8 Daffodil bulbs, 10 Hyacinths bulbs and 12 Tulip bulbs. For every 3 bulbs that were planted, how many hyacinth bulbs were planted? Was it 1,2,3, or 5?
*September 19, 2013*

**physics**

A rock is dropped into the Grand Canyon. It takes 18 seconds to hit the bottom. Calculate how deep the canyon is.
*August 26, 2013*

**Math**

What would be the present value of $365 a year for 20 years at a 14 % discount rate.
*June 18, 2013*

**Finance**

IF i AM PAYING $1,626.83 MONTH FOR 15 YEARS AT 4% WHAT WOULD THE ORIGINAL MORTGAGE AMT BE
*June 18, 2013*

**Business**

Please edit my answers below the questions for correct sentencing In the following statement, a business owner attempts to explain and justify his slow growth in his business. I limit my growth pace and every effort to service my present customers in the manner they deserve. I...
*June 6, 2013*

**Algebra**

What values for θ (0≤θ≤2π) satisfy the equation 2cos θ+1=-cos θ?
*May 29, 2013*

**Chemistry**

The volume of a gas sample is 200 L at 740 torr. What is its volume at 760 torr?
*May 22, 2013*

**Chemistry**

The volume of a gas sample is 200 L at 740 torr. What is its volume at 760 torr?
*May 22, 2013*

**math**

They skated 14 miles in 2 hours.if they skated at a constant rate, how many miles did they skate in 1 hour
*April 24, 2013*

**pre calculus**

what is 36.1 and 50.8 rounded to three decimal places? I was never really good at this stuff....please help!
*April 22, 2013*

**Physics**

c) please anyone!
*April 9, 2013*

**math**

. Ms. Alison drew a box-and-whisker plot to represent her students’ scores on a mid-term test. Josh received 72 on the test. Describe how his score compared to those of his classmates. (1 point)About 25% scored higher; about 75% scored lower. Everyone scored higher. No ...
*April 8, 2013*

**math**

What percentage of the total students chose skateboarding? (1 point) 10% 20% 30% none of these if 2 bys and 1 girl chose skateboarding? What percentage of the boys chose walking? (1 point) 30% 45% 25% none of these
*March 27, 2013*

**Algebra**

Express in a different or equivalent form. - 11x + 3 / 4x - 3
*March 11, 2013*

**Math**

How do I find the dimensions of a rectangle if the length of the rectangle is 1 yard more than twice its width, and the area of the rectangle is 66 yards^2 .
*March 7, 2013*

**Physics**

Assume that in interstellar space the distance between two electrons is about 0.87 cm. The electric force between them are repulsive. Calculate the electric force between these two electrons. The value of the Coulomb constant 9 × 109 N · m2/C2 and the elemental ...
*March 3, 2013*

**Math (Simplifying Expressions)**

How would I solve this? 48÷4x5-2x5
*February 25, 2013*

**Calculus**

y= (t^3 + t)/(t^4 - 2) y'=
*February 22, 2013*

**Calculus**

On what interval is the function f(x)= x^3 - 3x^2 + 7x concave up?
*February 21, 2013*

**biology help?**

I would like to know why the first part of the experiment A was done with distilled waetr
*February 15, 2013*

**health information law and ethics**

White- collar crime comes in many varieties of fraud and abuse resulting in escalating health care cost.
*January 30, 2013*

**health information law and ethics**

Would this be a good thesis for- types of fraud and abuse, what are the effects in health care?
*January 30, 2013*

**health information law and ethics**

Also the effects is has on us.
*January 30, 2013*

**health information law and ethics**

I would like to know the various types of fraud and methods of abuse that are being used in the healthcare world.
*January 30, 2013*

**health information law and ethics**

Can someone help with a thesis on health care fraud and abuse?
*January 30, 2013*

**Functions, math**

7cosx+35=13+3cosx+24
*January 23, 2013*

**physics**

a 2.0 kg bad is held by a string to the ceiling . A 10 g bullet traveling at 200 m/s strikes the stationary bag. the height after the collision is 10.0 cm. assuming there is no friction, determine the speed, in meters per second, of the bag after the collisaon.
*January 12, 2013*

**Math**

Sally drives a car forty two miles and used 5 gallons of gas. How many miles can sally travel on 15 gallons of gas.
*January 9, 2013*

**Business Communication**

what would owen's equity be a negative number
*December 26, 2012*

**Chemistry**

Oops. Thanks. I see I copied 0.007943 incorrectly. I'll be more careful in the future.
*December 7, 2012*

**Chemistry**

Titration of 25.00 mL of a monoprotic acid solution with 0.2269 M NaOH is: Initial NaOH = 3.96 mL Final NaOH = 38.84 mL (dif is 34.88mL) Based on data what is the molar concentration of acid? I did V x M = 0.03488L NaOH x 0.2269 = 0.079143 Not sure if I should have switched to...
*December 7, 2012*

**Chemistry**

Thanks so much. I had come up with 12.5 mmols, but didn't know what to do with it.
*December 5, 2012*

**Chemistry**

If 1 antacid tab neutralizes 6.84 mmol of HCL (36.46 g/mol). How many tabs are needed to neutralize 125 mL of stomach acid. Assume [H3O+] = 0.10 mmol/mL. I have no idea where to go with this. Any formula would help
*December 5, 2012*

**Chemistry**

In 1 antacid tab neutralizes 6.84 mmol of HCL (36.46 g/mol). How many tabs are needed to neutralize 125 mL of stomach acid. Assume [H3O+] = 0.10 mmol/mL. I have no idea where to go with this. Any formula would help.
*December 5, 2012*

**Calc-math**

I can do the Ferris Wheel type. This one I can not solve. A light is attached to a 13 inch radius bicycle tire, at a point 8 inches from the center. If Harvey rides the bike at 15 mph, how fast is the light moving up and down at its fastest?
*December 5, 2012*

**Chemistry Lab **

I need help with the third part The chemical method of analysis in determination of the blood alcohol content (%BAC) is: K2Cr2O7 + H2SO4 + C2H5OH → Cr2(SO4)3 + K2SO4 + CH3COOH + H2O What are the stoichiometric coefficients for the reaction above? (please enter the ...
*December 4, 2012*

**Math**

A crew of spiders moved into the scary old house and started working at once. They spun 2 webs on the first night, and 7 webs on the second night. On the third night they wove 12 webs. Every night they made 5 more webs than they had made the night before. If the spiders kept ...
*December 3, 2012*

**computer science**

Can you find the reason that the following pseudocode function does not return the value indicated in the comments? // The calcDiscountPrice function accepts an item’s price and // the discount percentage as arguments. It use those // values to calculate and return the ...
*November 21, 2012*

**physics**

To drive a typical car at 40 mph on a level road for one hour requires about 3.2 × 10^7 J of energy. Suppose one tried to store this much energy in a spinning solid cylindrical flywheel which was then coupled to the wheels of the car. A large flywheel cannot be spun too ...
*November 16, 2012*

**physics**

Point P is on the rim of a wheel of radius 2.0 m. At time t = 0, the wheel is at rest, and P is on the x axis. The wheel undergoes a uniform angular acceleration of 0.01 rad/s^2 about the center O. In Figure 9.1, the magnitude of the linear acceleration of P, when it reaches ...
*November 16, 2012*

**physics**

A block of mass m = 3.6 kg, moving on a frictionless surface with a speed vi=9.3m/s makes a perfectly elastic collision with a block of mass M at rest. After the collision, the 3.6 kg block recoils with a speed of vf=2.7m/s. In Figure 8.2, the speed of the block of mass M ...
*November 16, 2012*

**Math**

Cari Bean was on her way to the islands in her yachet. Because of the waves and the currents, she was making irregular progess. The first day she traveled 100 miles. The second day she traversed 120 miles, and the third day only 90 miles. On the fourth day she made 110 miles, ...
*October 23, 2012*

**Math**

Artie Choke and Tom A. Toe both shop at the same local grocery store between five and six in the evening. The last time they saw each other was on Tuesday. Artie shops every five days and Tom shops every four days. What day of the week will they next run into each other at the...
*October 17, 2012*

**algebra**

At local ball park team charges $4 for each ticket and expects to make $1100 in concessions. Teams must pay its players $1300 and pay all other workers $1200. Each fan gets a free bat that costs the team $3 per bat. How many tickets must be sold to break even?
*October 16, 2012*

**english**

what is the subject in these paragraphs. In the middle of Germany is the Harz mountain range.The tallest mountain in the range is called the Brocken.The trees that cover the sides of the Brocken are thick and tall,and many lean against each other.
*September 10, 2012*

**english **

how to find the subjects of the clauses in sentences
*September 10, 2012*

**Psychology**

Well what is this particular question asking me to explain?
*August 19, 2012*

**math, water conservation**

a water tower holds 1 million gallons at 38 ft. what is the percent of the water in the tank when the level reaches 26 ft?
*August 13, 2012*

**Physics**

A mass of 60kg is on the edge of a plank. The Plank is 25 m long. There is a wedge 10 m from the 60 kg. Where would you position a 40kg so the plank would not rotate? If you placed the 40 kg at the end, where would you put a 10 kg mass to keep it balanced?
*June 25, 2012*

**business math and statistics**

IF THE TERM IS SHORT
*June 22, 2012*

**geography**

what are land features found in the united states
*June 4, 2012*

**Chemistry**

A gas has a pressure of 710 kPa at 227 Celsius. What will its pressure be at 27 Celsius, if the volume does not change?
*May 6, 2012*

**Life orientation**

Critically discuss 8 ways in which the environmental problem(teenage pregnancy)impacts on our community
*April 27, 2012*

**algebra**

find the variation constant and an equation of variation where y varies directly as x and y = 54 when x =x6
*April 15, 2012*

**algebra**

If the sides of a square are lengthened by 6 cm the area becomes 196 cm 2 find the length of a side of the original square?
*April 15, 2012*

**algebra**

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0. Solution:2
*April 8, 2012*

**algebra**

The number of tickets sold each day for an upcoming performance of Handel's Messiah is given by N(x)=-0.6x^2+12+13, where x is the number of days since the concert was first announced. When will daily ticket sales peak and how many tickets will be sold that day?
*April 8, 2012*

**algebra**

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0 -sqrt3, 3sqrt3
*March 28, 2012*

**algebra**

During the first part of a trip, a canoeist travels 69 miles at a certain speed. The canoeist traveled 23 miles on the second part of the trip at a speed 5 mph slower. The total time for the trip is 2 hrs. What was the speed on each part of the trip?
*March 28, 2012*

**math**

Find the LCM of (7+5t),(49-25t^2), and (7t-5t)
*March 11, 2012*

**math**

Jodie bicycles 6 km/h faster than Javier. In the same time it takes Javier to bicycle 42km, Jodie can bicycle 60 km. How fast is each bicyclist traveling?
*March 11, 2012*

**Pre-cal**

Find the length of side b to the nearest whole number if side a = 105, angle A = 65 degrees, and angle B = 37 degree.
*March 5, 2012*

**psychology**

Activation-synthesis dream theory purports that dreams rersult from the brain's effort to make sense of: a. the day's activities and experiences b. problems the person has not yet tresolved c. our external world d. spontaneously firing neurons during REM sleep. My ...
*February 23, 2012*

**psychology**

A worker who recently switched from day to swing shift has become less efficient and more irritable. He is also making more mistakes than he did on the day shift. The cause of this worker's problem is likely to be: a. sleep disorders due to change in shift b. excessive ...
*February 23, 2012*

**Psychology**

The majority of psychologists are electric, which means they draw information from different schools of thought rather than limiting themselves to information gained from only one perspective. However, most psychologists agree that it's important to: a. gather empirical ...
*February 20, 2012*

**Psychology**

1. competition; anonymity implies social identity.
*February 20, 2012*