Friday

August 1, 2014

August 1, 2014

Total # Posts: 310

**statistics**

Construct a 95% prediction interval for the number of hours of sleep for an adult who is 45 years old

**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...

**math**

Thanks,now I totally understand

**math**

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

**math**

please represent algebraic express 20 less than 19 divided by 3X

**Maths**

Find the derivative of y=1/x at x=1/4 Answer: 1/1/16

**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)?

**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, a...

**Physics**

0.2295

**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.

**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

**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?

**algebra**

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

**ALGEBRA**

How many inches of molding are needed to produce the square picture frame 13" 1/8

**ALGEBRA**

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

**ALBEBRA**

INPUT ---------- OUTPUT X 2x-x/2 -10 -10

**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?

**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)

**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.

**geometry**

if you add 10% to each side of a triangle what is the % of gain

**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...

**Chemistry**

Alternative answers: A)10 B)13 C)1.9 D)3.8 E)12

**Science**

Determine the pkb of methylamine if the kb is 4.4*10^-4.

**Algebra**

what is the expression that is equivalent to -2(x-3)

**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!!!!

**math**

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

**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?

**MICROECONOMICS**

Explain the relationship between labor earnings and the distribution of income

**MICROECONOMICS**

How have insights from the field of psychology influenced the thinking of economists in recent years?

**MICROECONOMICS**

Explain the relationship between labor earnings and the distribution of income

**maths **

2/π ∫ π - 0 t^2 cos (nt) dt how to solve this anyone?

**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?

**physics**

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

**Math**

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

**Finance**

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

**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...

**Algebra**

What values for θ (0≤θ≤2π) satisfy the equation 2cos θ+1=-cos θ?

**Chemistry**

The volume of a gas sample is 200 L at 740 torr. What is its volume at 760 torr?

**Chemistry**

The volume of a gas sample is 200 L at 740 torr. What is its volume at 760 torr?

**math**

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

**pre calculus**

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

**Physics**

c) please anyone!

**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 on...

**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

**Algebra**

Express in a different or equivalent form. - 11x + 3 / 4x - 3

**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 .

**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 ch...

**Math (Simplifying Expressions)**

How would I solve this? 48÷4x5-2x5

**Calculus**

y= (t^3 + t)/(t^4 - 2) y'=

**Calculus**

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

**biology help?**

I would like to know why the first part of the experiment A was done with distilled waetr

**health information law and ethics**

White- collar crime comes in many varieties of fraud and abuse resulting in escalating health care cost.

**health information law and ethics**

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

**health information law and ethics**

Also the effects is has on us.

**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.

**health information law and ethics**

Can someone help with a thesis on health care fraud and abuse?

**Functions, math**

7cosx+35=13+3cosx+24

**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.

**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.

**Business Communication**

what would owen's equity be a negative number

**Chemistry**

Oops. Thanks. I see I copied 0.007943 incorrectly. I'll be more careful in the future.

**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...

**Chemistry**

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

**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

**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.

**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?

**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 coeffi...

**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 s...

**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 di...

**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 ...

**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 t...

**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 afte...

**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, ...

**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...

**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?

**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.

**english **

how to find the subjects of the clauses in sentences

**Psychology**

Well what is this particular question asking me to explain?

**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?

**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?

**business math and statistics**

IF THE TERM IS SHORT

**geography**

what are land features found in the united states

**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?

**Life orientation**

Critically discuss 8 ways in which the environmental problem(teenage pregnancy)impacts on our community

**algebra**

find the variation constant and an equation of variation where y varies directly as x and y = 54 when x =x6

**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?

**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

**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?

**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

**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?

**math**

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

**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?

**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.

**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 answ...

**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 lig...

**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 ev...

**Psychology**

1. competition; anonymity implies social identity.

**Psychology**

Can you assist me with those 2 questions??

**Psychology**

Hi i need help with 2 practice questions 1. Just as _____ can strengthen social identity, ______ can reduce conflict between "us" and "them" a. competition; anonymity b. interdependence; cooperation c. individualism; interdependence d. competition; cooperat...

**PSY**

I am guessing this one is it A