# Posts by Andrea

Total # Posts: 850

**Calculus**

Shadow Length A man 6 feet tall walks at a rate of 3 ft per second away from a light that is 16 ft above the ground (see figure). When he is 11 ft from the base of the light find the following. (a) The rate the tip of the shadow is moving. (b) The rate the length of his shadow...

*August 31, 2011*

**algebra/math**

Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 100 people. a) How many would you expect to be between 158 and 172 cm tall? b) How many would you expect to be taller than 160 ...

*August 27, 2011*

**math**

yeah, thank you!

*August 25, 2011*

**Precal**

Consider the line segment joining A(-1,2) and B(3,4) a) find an equation that expresses the fact that a point P(x,y) is equidistant from A and from B. b) describe geometrically the set of points described by the equation in part (a).

*August 25, 2011*

**Language art**

What is a group of people at a dance with letters bssmyale

*July 18, 2011*

**Med terms**

spudum = sputum CODP = COPD AFONIA = APHONIA CHRONIC CONSTRUCTIVE PULMONARY DISEASE = CHRONIC OBSTRUCTIVE PULMONARY DISEASE DOT = DOB EUPNEA = APENA VENTOLATOR = VENTILATOR DYSPHNEA = DYSPNEA PARIOXYSM = PAROXYSM DAILYS = DAYS

*July 12, 2011*

**christian counseling**

Hello, I actually am reading the d**** books thanks I was just wondering about the topic if I was on the right track for when I write my paper if they both talked about abandonment critisicm. I have a learning disability thanks.

*June 14, 2011*

**christian counseling**

Hello, in the two books Love and Respect by Eggrichs and Why you do the things you do: The secret to a healthy relationship by Tim Clinton, what are some topics that are used in both books. thanks

*June 14, 2011*

**Business**

Is it good or bad for corporations to rely on vendors for computing support? List arguments both for and against reliance on vendors as part of your answer.

*June 12, 2011*

**Math**

X -2, 0, 3, 4 Y 6, -2, -14, -18 Write the function

*May 23, 2011*

**Math**

Simplify: 21d - 8d^2 + 5d^3 - 5d^2

*May 23, 2011*

**Math**

A number cube is rolled 60 times. How many times would you expect to roll a 5?

*May 18, 2011*

**Math**

Write the perfect squares that are greater than 70 and less than 120.

*May 18, 2011*

**algebra**

A gardener wants to create a triangular garden in the shape of a right triangle with shortest side length x – 2y ft. and the middle length side x + 4y ft. What is an algebraic expression for the area of the garden? Be sure to multiply this out and express in simplest ...

*April 28, 2011*

**Algebra 2**

If a 20 in. by 30 in. picture has a wooden frame "x" in. wide surrounding it, which equation can be used to find the total area of the picture and frame?

*April 26, 2011*

**childcare**

HERE R THE CORRECT ANSWERS; 1-D PAGE25 2- 3-B PAGE18 AND 19 4- 5-C PAGE15 6-A PAGE 30 7- 8- 9-D PAGE 21 10- 11-B PAGE 20 12-C PAGE 10 13-B PAGE 10 14- IM NOT REALLY SURE BCZ IN PAGE 19 SPECIFY THAT CHILDREN OF AGE 6TO 8 THEY CAN TAKE CARE OF THEIR OWN PERSONAL NEEDS BUT ON THE...

*April 14, 2011*

**Statistics**

z Score: When Reese Witherspoon won an Oscar as Best Actress for the movie Walk the Line, her age was converted to a z score of -0.61 when included among the ages of all other Oscar-winning Best Actresses at the time of this writing. Was her age above the mean or below the ...

*April 8, 2011*

**Statistics**

America Online occasionally conducts online polls in which Internet users can respond to a question. If a graph is constructed to illustrate results from such a poll, and the graph is designed objectively with sound graphing techniques, does the graph provide us with greater ...

*April 8, 2011*

**Statistics**

Unauthorized Downloading: A Harris Interactive survey involved 1644 people between the ages of 8 years and 18 years. The accompanying table summarizes the results. Does this table describe a relative frequency distribution? Why or why not? Downloaded Material Percent Music 32...

*April 8, 2011*

**Statistics**

The production of ages at inauguration of all U.S. Presidents who had professions in the military is 62, 46, 68, 64, 57. Why does it not make sense to construct a histogram for this data set?

*April 8, 2011*

**Statistics**

In an editorial, the Poughkeepsie Journal printed this statement: "The median price--the price exactly in between the highest and lowest--..." Does that statement correctly describe the median? Why or why not?

*April 8, 2011*

**Statistics**

When the Indianapolis Colts recently won the Super Bowl, the numbers on the jerseys of the active players were 29, 41, 50, 58, 79,..., 10 (listed in the alphabetical order of the player's names). Does it make sense to calculate the mean of those numbers? Why or why not?

*April 8, 2011*

**geometry**

what measure of an exterior angle of a hexagon? a)45 B)60 C)120 D)150

*April 7, 2011*

**Biology . Ahh , help me with this question please**

summarize how unicellular organisms may have given rise to the first animals ? Please , & thank you(:

*April 7, 2011*

**3rd grade math**

my daughter came home with input/output table don't understand how to do it Input Output 4 33 5 36 11 54 16 69

*April 5, 2011*

**Math**

The capacity of a measuring pitcher is 96 fluid ounces. How many quarts can the pitcher hold?

*March 14, 2011*

**Calculus**

the height of an object thrown on the surface of a certin planet is s(t)=80t-16t^2. what is the velocity? what is the acceleration? when is the velocity zero?

*March 14, 2011*

**Chemistry**

0.05 L

*March 9, 2011*

**Math**

Alicia went on a steamboat ride up the Mississippi River. The boat travels 24 miles per hour in still water. How long will it take her to travel 48 miles upstream if the current of the river is 8 miles per hour?

*March 7, 2011*

**social studies**

what are two homework questions about pope leo III????

*March 6, 2011*

**Physics : drwls (Please Help Me)**

yeah the graph they gave me was triangle shape was above the x-axis. the two ends of the legs are touching the x-axis but does not cross all the way to the negative side.

*March 1, 2011*

**Physics**

In a velocity vs. time graph, the graph illustrates a triangle shape. A. why might a smart student say the object reverses direction? B. why might a smart student say the object doesn't reverse direction? C. Does the object reverse direction? Explain why.

*March 1, 2011*

**Physics : Please Help Me!!!**

In a velocity vs. time graph, the graph illustrates a triangle shape. A. why might a smart student say the object reverses direction? B. why might a smart student say the object doesn't reverse direction? C. Does the object reverse direction? Explain why.

*March 1, 2011*

**science**

how do i figure out the science metric conversion of .003 m = mm?

*February 27, 2011*

**science**

what is the answer to the problem .003m = mm?

*February 27, 2011*

**physics**

The International Space Station, launched in November 1998, makes 15.65 revolutions around the earth each day in a circular orbit. Apply Newton's second law to the space station and find its height (in kilometers) above the earth's surface.

*February 23, 2011*

**Chemistry - Enthalpy change and stoichiometry**

how to calculate enthapy change of products

*February 23, 2011*

**English**

Is there euphony, cacophony, onomatopoeia in the poem Phenomenal Woman by Maya Angelou? Examples are needed.

*February 22, 2011*

**physics**

One of the tenets of the pseudoscience (i.e., "false science") of astrology is that, in some mysterious way, the positions of the planets at the time of a person's birth somehow influence the characteristics of that person. To see if this proposition seems ...

*February 22, 2011*

**physics**

A block slides a distance d down a frictionless plane and then comes to a stop after sliding a distance s across a rough horizontal plane. What fraction of the distance s does the block slide before its speed is reduced to one-third of the maximum speed it had at the bottom of...

*February 22, 2011*

**physics**

Consider two frictionless inclined planes with the same vertical height. Plane 1 makes an angle of 25.0 degree with the horizontal, and plane 2 makes an angle of 55.0 degree with the horizontal. Mass m_1 is placed at the top of plane 1, and mass m_2 is placed at the top of ...

*February 22, 2011*

**physics**

Which of the following statements about work is or are true? (More than one statement may be true.) A. Negative net work done on an object always reduces the object's kinetic energy. B. If the work done on an object by a force is zero, then either the force or the ...

*February 22, 2011*

**physics**

A 15.0 kg stone and a 150 kg stone are released from rest at the same height above the ground. There is no appreciable air drag. Which of the following statements is or are true? (More than one statement may be true.) A. Both stones have the same initial gravitational ...

*February 22, 2011*

**physics**

A 1.00 g grasshopper and a 0.100 g cricket leap vertically into the air with the same initial speed in the absence of air drag. Which of the following statements must be true? (More than one statement may be true.) A. The grasshopper goes 10 times as high as the cricket. B. ...

*February 22, 2011*

**physics**

Two balls having different masses reach the same height when shot into the air from the ground. If there is no air drag, which of the following statements must be true? (More than one statement may be true.) A. Both balls left the ground with the same speed. B. Both balls left...

*February 22, 2011*

**college**

Given that the distance from the earth to the sun is 1.5 times 10 to the power m and the

*February 16, 2011*

**statistics**

An urn contains 4 blue balls, 5 yellow balls and 7 red balls. if a single ball is selected, find the probability thet the ball is Red? Not blue? blue or yellow

*February 15, 2011*

**algebra**

The number of Hybrid vehicles sold weekly at a local car lot increased from 11 in 2006 to 19 in 2008. Predict the number of Hybrid vehicles sold weekly in 2011. My answer: rate = 19 - 11 2008 - 2006 rate = 8 2 rate = 4 then I subtracted 2011 from 2008 got 3 and multiplied that...

*February 15, 2011*

**chemistry**

Thanks for helping :) I understand that part, but I don't get in what direction each of the conditions listed above would the equilibrium shift to and how the colour would change.

*February 15, 2011*

**chemistry**

When varsol and iodine in potassium iodide aqueous solution is mixed, two phases form. What are the colours in each of the 2 phases when 2ml of I2/KI aqueous solution plus 2 ml of varsol are mixed in a test tube? What are the colours in each of the 2 phases when each of the ...

*February 15, 2011*

**algebra**

How do I find the slope of each of the three line segments 3,6,9 not on a straight line. then which two points is the slope the largest?

*February 13, 2011*

**algebra**

Find the slope of each of the three line segments. Between which two points is the slope the largest? 0 to 3 to 6 to 9 not a straight line.

*February 13, 2011*

**algebra**

on a graph starting at 0 and sloping up to 480 on total # of words typed and 16 time in mins. Hannahs typing ability Kerry can type the same # of words in half the time. a)what rate does Hannah type? b)what rate does Kerry type? c)How many words can Kerry type in 8 mins?

*February 13, 2011*

**math**

The the Hanson's have reduced the average number of hours they watch tv each day from 5.5 hrs. in march to 2.5 hrs. in june. Find the rate of change in average number of hrs. they watch tv each day. I think the answer is rate = 5.5 - 2.5/3 rate = 3/3 rate = 1 hr. is this ...

*February 13, 2011*

**geometry**

If the degree measures of the angles of a triangle are represented by x,y,x+y the triangle must be??

*February 10, 2011*

**algebra**

y = -4x -2 find the y coordinates of the points (1),(-1),(-3).

*February 8, 2011*

**algebra**

y = -4x - 2 find the coordinates of the points (1),(-1),(-3).

*February 8, 2011*

**algebra**

(2/3)((7/8)-4x)-5/8=3/8

*February 6, 2011*

**algebra**

Math Magicians charges $45 registration fee plus $30 per hour for tutoring. Math Master charges $25 registration fee plus #35 per hour tutoring fee. How many hours per tutoring would it take to make Math Magicians cheaper than Math Master?

*February 5, 2011*

**physics multiple choice**

Far from any gravity, an astronaut accidentally releases a metal wrench inside a spaceship that is traveling at a constant velocity of 250 km/s away from earth in outer space. What will be the subsequent behavior of that wrench as observed by the astronaut? A. It will fall to ...

*February 2, 2011*

**physics multiple choice**

A worker pushes horizontally on a 2000 N refrigerator on a kitchen floor with a force of 28.0 N. A. If the refrigerator moves forward, this person feels it pushing back with less than 28.0 N. B. The person always feels a 28.0 N push from the refrigerator. C. The person feels ...

*February 2, 2011*

**physics**

A. What is the mass of a book that weighs 3.20 N in the laboratory? B.In the same lab, what is the weight of a dog whose mass is 14.0 kg?

*February 2, 2011*

**physics**

A box rests on a frozen pond, which serves as a frictionless horizontal surface. If a fisherman applies a horizontal force with magnitude 44.0 N to the box and produces an acceleration of magnitude 2.80 m/s^{2}, what is the mass of the box?

*February 2, 2011*

**physics**

A warehouse worker pushes a crate along the floor, as shown in the figure , by a force of 10.0 N that points downward at an angle of 45.0 degree below the horizontal. A. Find the horizontal component of the push. B.Find the vertical component of the push.

*February 2, 2011*

**physics multiple choice**

A person pushes horizontally with constant force P on a 230 N box resting on a frictionless horizontal floor. Which of the following statements about this box is correct? A.The box will accelerate no matter how small P is. B. The box will not accelerate unless P > 230 N. C...

*February 2, 2011*

**physics multiple choice**

A 3.00 lb. physics book rests on an ordinary scale that is placed on a horizontal table. The reaction force to the downward 3.00 lb force on the book is A. an upward 3.00 lb force on the scale due to the table. B.an upward 3.00 lb force on the book due to the scale. C.an ...

*February 2, 2011*

**physics multiple choice**

A force F is required to push a crate along a rough horizontal floor at a constant speed V with friction present. What force is needed to push this crate along the same floor at a constant speed 3V if friction is the same as before? A. A constant force 3F is needed. B. A force...

*February 2, 2011*

**physics**

A Ferris wheel with radius 14.0 m is turning about a horizontal axis through its center, as shown in the figure below. The linear speed of a passenger on the rim is constant and equal to 6.00 m/s. A.What is the magnitude of the passenger's acceleration as she passes ...

*February 2, 2011*

**physics**

You swing a 2.00 kg stone in a circle, using the full length of a thin 80.0 cm rope. At what speed should you swing it so its acceleration will be 9.8 m/s^2?

*February 2, 2011*

**physics**

You swing a 2.00 kg stone in a circle, using the full length of a thin 80.0 cm rope. At what speed should you swing it so its acceleration will be 9.8 m/s^2?

*February 2, 2011*

**child day care**

wao, those answer r really sucky! heres mines 1-D 2- 3-B 4- 5-C 6-A 7- 8-C 9-D 10- 11-B 12-C 13-B 14 15- 16-A 17- 18-C 19- 20-B THESE R ALL BY THE SAME ORDER THAT APPEARS ON THE STUDY UNIT GOOD LUCK! =)

*February 1, 2011*

**stats**

a) Explain the difference between sampling error and no sampling error.

*January 31, 2011*

**Urgent!!! Physics**

A meteor streaking through the night sky is located with radar. At point A its coordinates are (5.60 km, 1.25 km), and 1.12 s later its has moved to point B with coordinates (6.16 km, 0.900 km). A. Find the x component of its average velocity between A and B. (in Km/s) B. Find...

*January 26, 2011*

**Urgent!!! Physics**

At an air show, a jet plane has velocity components Vx = 625 and Vy = 415 at time 3.85s and Vx = 838 and Vy = 365 at time 6.52s . A. For this time interval, find the x component of the plane's average acceleration in km/h2. B. For this time interval, find the y component ...

*January 26, 2011*

**physics**

A brick is released with no initial speed from the roof of a building and strikes the ground in 1.50 {s}, encountering no appreciable air drag. A. How tall, in meters, is the building? B.How fast is the brick moving just before it reaches the ground?

*January 26, 2011*

**physics**

A meterstick is held vertically above your hand, with the lower end between your thumb and first finger. On seeing the meter stick released, you grab it with those two fingers. You can calculate your reaction time from the distance the meterstick falls, read directly from the ...

*January 26, 2011*

**physics**

An object is thrown up at an angle of 40.0 degree above the horizontal and reaches a maximum height H. If the angle is now doubled to 80.0^degree, but nothing else is changed, its maximum height will be a. 1.67 H. b. 2.00 H. c. 2.35 H. d. 4.00 H.

*January 25, 2011*

**physics**

A cannonball is fired horizontally from a 240 {m}-high cliff toward a vertical building 720 {m} away with an initial velocity of 120 {m/s}. When the ball will hit the building? in a. 7.00 {s} b. 6.00 {s} c. less than 6.00 {s} d. more than 7.00 {s}

*January 25, 2011*

**physics**

Problem: A sample of liquid has amass of 1.04 kg and a volume of 1300 ml. If the mass of the sampleis to be increased by 70 g by adding more of the same kind kind ofliquid, what volume of liquid must be added? Solution given: 1) 1040/1300=.80 2) 70/.80=88 1. Give an ...

*January 24, 2011*

**physics**

Problem: Two blocks of metals have the same mass. The first block has a volume of 827 cm^3 and a density of 4.50g/cm^3.Thesecond block has a volume of 193cm^3. What is the density of thesecond block ? Solution: (1) 4.50x827=3720 (2)3720/193=19.3 1. Give an interpretation ( not...

*January 24, 2011*

**physics**

Problem: Two blocks of metals have the same mass. The first block has a volume of 827 cm^3 and a density of 4.50g/cm^3.Thesecond block has a volume of 193cm^3. What is the density of thesecond block ? Solution: (1) 4.50x827=3720 (2)3720/193=19.3 1. Give an interpretation ( not...

*January 24, 2011*

**physics**

Problem: A sample of liquid has amass of 1.04 kg and a volume of 1300 ml. If the mass of the sampleis to be increased by 70 g by adding more of the same kind kind ofliquid, what volume of liquid must be added? Solution given: 1) 1040/1300=.80 2) 70/.80=88 1. Give an ...

*January 24, 2011*

**physics**

B. You can get 28 oz of spicy pretzels for $4.40, or you can get 16 oz of regular pretzels for $2.30. 1. Which is a better deal? Explain your reasoning. 2. How much would 16 oz of the spicy pretzels cost, assuming the same price per ounce?

*January 24, 2011*

**physics**

A. There are 28 g of salt dissolved in 400 ml of water. Consider the quantity 0.07 = 28/400. 1. Give the name of the quantity if there is one. 2. What is the interpretation of . 07 g in this context? 3. Use the interpretation to find the amount of salt dissolved in 19 ml of ...

*January 24, 2011*

**chemistry**

A 0.50 {\rm g} sample of vegetable oil is placed in a calorimeter. When the sample is burned, 18.9 {\rm kJ} are given off.

*January 23, 2011*

**physics**

In 1954, Roger Bannister became the first human to run a mile in less than 4 minutes. Suppose that a runner on a straight track covers a distance of 1.00 mi in exactly 4.00 min. 1. What is his average speed in mi/h? 2. What is his average speed in ft/s? 3. What is his average ...

*January 20, 2011*

**Math**

idk

*January 12, 2011*

**Chemistry**

0.50 mol

*January 4, 2011*

**geometry**

no because 2+6 has to be greater than 11

*January 2, 2011*

**math 5TH GRADE**

i think it us 45%

*December 13, 2010*

**Physics**

A thing rod of length L and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass 5.00kg is attached to the other end. The rod is pulled aside through an angle 30.0 degrees and released. What is the speed of the ball at the lowest ...

*December 9, 2010*

**Physics**

A 24 inch string is wrapped around the 1/8 inch radius axis of a yo yo. Starting from rest the yo yo descends with a constant angular acceleration of 4 rad/second squared. How long will it take the string to completely unwind?

*December 9, 2010*

**math**

5.625 pounds.

*December 8, 2010*

**social studies**

I can't find my answer in this article

*December 8, 2010*

**social studies**

In what ways did Europeans' desire for trade with Asia affect the western hemisphere?

*December 8, 2010*

**social studies**

No, Hitler committed suicide in his bunker with Ava Braun * Spelling*

*December 7, 2010*

**Physics**

So I choose the bottom right corner as the pivot point. The radial arm up to point P is the length L of the side of the sign, and the horizontal force is perpendicular to this radial arm. The weight acts straight down, so the radial arm perpendicular to the weight is half the ...

*December 6, 2010*

**Chemistry**

why would acetic acid concentration of a good vinegar need to be known for commercial reasons and regulatory health and safety reasons

*December 3, 2010*

**Chemistry**

suppose a pippetting error was made when preparing the diluted vinegar, but the diluted vinigar solution was uniform and the naoh titration values were consistant. when will the student learn that the experiment result was not accurate explain

*December 3, 2010*

**Chemistry**

A student did not fully mix the solution of Oxalic Acid in the volumetric flask predict and explain the effect of the range of the students titration volumes when using the NaOH solution to titrate the Oxalic Acid solution

*December 2, 2010*