Saturday

November 28, 2015
Total # Posts: 2,047

**Math**

A pathologist, trying to identify a bacterial infection, places a sample in a growth chamber and measures 1000 bacteria at the end of day 5 of the test. From daily measurements, the growth rate of the number of bacteria is determined to be 5% per day. Note that: A linear ...
*October 25, 2011*

**Math**

Find a system of linear equations corresponding to the following augmented matrices: (a) 2 0 |0 3 −4 |0 0 1 |1 (b) 3 0 −2 |5 7 1 4 |−3 0 −2 1 |7 (c) 7 2 1 −3 |5 1 2 4 0 |1 (d) 1 0 0 0 |7 0 1 0 0 |−2 0 0 1 0 |3 0 0 0 1 |4
*October 25, 2011*

**Math**

Find the augmented matrix for each of the following systems of linear equations: (a) 3x1 − 2x2 = −1 4x1 + 5x2 = 3 7x1 + 3x2 = 2 (b) 2x1 + 2x3 =1 3x1 − x2 + 4 x3 = 7 6x1 + x2 − x3 = 0 (c) x1 + 2x2 − x4 + x5 =1 3x2 + x3 − x5 = 2 x3 + 7x4 =1 (d...
*October 25, 2011*

**Math**

Which of the following are linear equations in x1, x2 and x3? (a) x1 + 5x2 − (2^0.5)x3 =1 (b) x1 + 3x2 + x1.x3 = 2 (c) x1 = −7x2 + 3x3 (d) x1^−2 + x2 + 8x3 =5 (e) x1^3/5 − 2x2 + x3 = 4 (f) πx1 − (2^0.5)x2 + 13x3 = 7^1/3
*October 25, 2011*

**Physics**

A small aircraft has a flying speed of 200 km/h in still air. To make a trip from Saskatoon to Regina, a straight line distance on the map of 250 km, a pilot must first determine the wind velocity and then calculate what direction to fly (the 'heading') to compensate ...
*October 25, 2011*

**english**

Ingrate Credible
*October 25, 2011*

**Science**

You throw a rock horizontally off a cliff with a speed of 10 m/s. after 3.1 seconds, how far were you when threw the rock?
*October 21, 2011*

**physics**

im talking about the ones asked at 7:55 and 7:57...please
*October 20, 2011*

**math**

bob can u please answer my physics questions
*October 20, 2011*

**Math**

32 tiles left over
*October 20, 2011*

**algebra 2 word problem**

yes both are right
*October 20, 2011*

**aLgEbrA variable & expression**

your welcome
*October 20, 2011*

**aLgEbrA variable & expression**

yes those are correct
*October 20, 2011*

**Mathematics!**

A cereal factory has weekly fixed costs of $48,000. It costs $1.37 to produce each box of cereal. A box of cereal sells for $3.99. Express the profit function p(x) that gives the total weekly profit from x boxes of cereal.
*October 20, 2011*

**physics**

A ball is thrown horizontally from the top of a building 30.1 m high. The ball strikes the ground at a point 66.8 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion. Answer in units of s
*October 20, 2011*

**physics**

A ball is thrown horizontally from the top of a building 30.1 m high. The ball strikes the ground at a point 66.8 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion. Answer in units of s
*October 20, 2011*

**physics**

A ball is thrown horizontally from the top of a building 30.1 m high. The ball strikes the ground at a point 66.8 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion. Answer in units of s
*October 20, 2011*

**physics**

A long jumper leaves the ground at an angle of 22.1◦ to the horizontal and at a speed of 10 m/s. How far does he jump? The acceleration due to gravity is 9.8 m/s2 . Answer in units of m
*October 20, 2011*

**Physics**

rpm= 34.68
*October 20, 2011*

**physics**

The fastest recorded pitch in Major League Baseball was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, the ball would fall 0.809 m (2.65 ft) by the time it reached home plate, 18.3 m (60 ft) away. The acceleration of gravity is 9.81 m/s2 . How fast was ...
*October 20, 2011*

**physics**

During a baseball game, a batter hits a pop- up to a fielder 78 m away. The acceleration of gravity is 9.8 m/s2 . If the ball remains in the air for 5.8 s, how high does it rise?
*October 20, 2011*

**Finance**

Consider the following two securities X and Y X y Return- 20.0% Return- 10.0% Standard Deviation- 20.0% Standard Dev 30% Beta- 1.50 Beta- 1.0 Risk-free asset Return- 5.0% Using the data from the table, what is the portfolio expected return and the portfolio beta if you invest ...
*October 19, 2011*

**Finance**

Nico Trading corporation is considering issuing long-term debt. The debt would have a 30 year maturity an a 10 percent coupon rate. In order to sell the issue, the bonds must be underpriced at a discount of 5 percent of face value. In addition, the firm would have to pay ...
*October 19, 2011*

**Finance**

____ in the beta coefficient normally causes____ in the required return and therefore ____ in the price of the stock, all else remaining the same. A. An increase, an increase, an increase B. An increase, a decrease, an increase C. An increase, an increase, an decrease D. A ...
*October 19, 2011*

**Finance**

Company- Ford Coupon-11.0 Maturity-July 31,2009 Last Price-65.50 Last Yield- ? EST Spread- 104 Est UST- 10 VOL.-5,100 Based on the table, what is the last yield for this bond?
*October 19, 2011*

**chemistry**

thank you!
*October 17, 2011*

**chemistry**

How many milligrams of magnesium palmitate will precipitate from 965ml of this solution when it is cooled from 50C to 25C? For Mg(C16H21O2)2, Ksp= 4.8x10(-12) at 50C and 3.3x10(-12) at 25C.
*October 17, 2011*

**Chemistry**

An experiment was done to determine the formula and formation constant of a metal ammine. The data were graphed giving a straight line plot with an equation of y = -5.9484x - 11.447. What is the correct forumla for this metal amine? M(NH3)6+ M(NH3)5+ M(NH3)4+ M(NH3)2+
*October 16, 2011*

**Organic chem 2**

Hello, I am having some trouble trying to reduce a benzene ring with a H3C-C=N-NH2 substituent, to a cyclohexane with the same substituent. The ring is attached to the carbon that is double bonded with the nitrogen. Apparently the hydrogenation, H2/1000psi with ru/rh at 100C, ...
*October 11, 2011*

**science**

Mercury is a heavy metal. Using atomic models and the periodic table of elements, explain why it belongs to this category of elements
*October 10, 2011*

**physics**

A compact disc spins at 2.8 revolutions per second. An ant is walking on the CD and finds that it just begins to slide off the CD when it reaches a point 3.1 cm from the CD's center. (a) What is the coefficient of friction between the ant and the CD? I dont understand how ...
*October 9, 2011*

**physics**

A 5kg box on a horizontal plane has a coefficient of kinetic energy of 0.2. The object is pulled on horizontally with a rope at 2 m/s^2. With 9.8m/s^2 gravitational force, what is the tension on the rope?
*October 6, 2011*

**physics**

Stickman is driving a dragster. He does the quarter mile in 4 seconds and at the finish line is speed is 100m/s. He deploys his parachute after he crosses the finish line and wished to slow to a speed of 10m/s in 10s. What diameter parachute does he need if the drag force is ...
*October 2, 2011*

**chemistry**

It takes 75 mL of 0.124 M KOH to neutralize 28.5 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer in moles/liter.
*October 1, 2011*

**math**

how do i find the answer to this expression 1.4 over 5.5 subtract 4.9 over 2.0
*September 26, 2011*

**math**

how do i find the answer to this expression 1.4 over 5.5 subtract 4.9 over 2.0
*September 26, 2011*

**math**

A model of a brdge is 1m long and 2.5% of the actual size of the bridge. How long is the actual bridge?
*September 25, 2011*

**Algebra II**

Right now we're doing systems of Linear Equations in Three Variables. It says to solve the following system: x - y + 3z = 4 x + 2y - z = -3 4x + 3y + 2z = -5 Whatever I try with this problem (and the others like it) it comes out wrong. I've had about one success. And ...
*September 20, 2011*

**Math**

1. Evaluate the indefinite integral ([6x^2 + 12x^(3/2) +4x+9]/sqrt x)dx. Answer = + C 2. Evaluate the indefinite integral (12sin x+4tan x)dx. Answer = + C 3. Evaluate the indefinite integral. (x^7)e^(x^8)dx. Answer = + C Thank you for helping.
*September 19, 2011*

**physical science**

which of the following statements correctly describes the substance with the formula KI?
*September 19, 2011*

**Algebra II**

Evaluate: ƒ(2) + 5 It says to use this graph to solve the equation: h t t p://i55 . t i n y p i c . com/2qdvfur.jpg Right now we're on Algebra and Composition with Functions. I have no idea what I'm supposed to do, and there are no instructions for any of these ...
*September 18, 2011*

**Physics**

A small source of light is located at a distance from a vertical wall. An opaque object with a height of moves toward the wall with constant velocity of magnitude . At time , the object is located at the source .
*September 15, 2011*

**math**

The answer should be 75 gray sweatshirts using the method that JJ explained.
*September 15, 2011*

**calculus**

show that if a, b & c are in v3, then (a cross b) dot [(b cross c)×(c cross a)] = [a dot (b cross c)]^2
*September 14, 2011*

**problem solving**

in a soccer tournament there are 22 entries. the tourney is single mathc elimination. that is 2 soccer teams compete at the same time and the loser is elimnated. how many games will be played to deterenmine chanmpioneship?
*September 12, 2011*

**ALGEBRA PLS HELP**

IS ANYONE AVAILABLE TO HELP TO SEE IF I DID THESE 5 PROBLMES OK?
*September 11, 2011*

**ALGEBRA PLS HELP**

CAN YOU CHECK IF IM RIGHT? |-2 +5 | ANSWER 7 |5| +4 ANSWER: 9 |-5| +4 ANSWER : 9 |5+2| ANSWER : 7 |3-7| ANSWER : -4
*September 11, 2011*

**English**

number 2 is c
*September 11, 2011*

**algebra**

1 |-2+5| 2 |5| +4 3 |-5| +4 4 |5+2| 5 |3 - 7| here are my answers: 1) 3 2) 9 3) 1 4) 7 5) 4
*September 11, 2011*

**algebra**

1) 3 2) 9 3) 1 4) 7 5) 4
*September 11, 2011*

**algebra**

fine each absolute value 5 quesitons: |-2+5| |5| +4 |-5| +4 |5+2| |3 - 7|
*September 11, 2011*

**Algebra 2**

6x=9y-21. 6y=4x+14 plz help...I can't figure out how to do this problem using linear equations with two variables
*September 11, 2011*

**science**

i need to make a taxonomic key for fruite apple orange strawberry banana can you help me with that
*September 10, 2011*

**chippewa**

FIND the ESTIMATE: 1) A RARE TRUFFLE ONCE SOLD FO $13.20 FOR A 0.44 OZ CAN. APPROXIMATELY HOW MUCH WOULD 1LB OF THIS TRUFFLE COST?
*September 5, 2011*

**math solution**

1200000*0.075*5+1200000
*September 3, 2011*

**math**

Angelo is paid double time for each hour he works over 40 hours in a week. Last week he worked 42 hours and earned $660. What is his normal hourly rate?
*September 1, 2011*

**math**

Scientists have calculated that the Moon's revolution around Earth is increasing by about .015 s per century. At this rate, how long would it take the length of a month to increase by one full day?
*September 1, 2011*

**7th grade math**

A diver dives from a platform with a height of 11m. What is the change in elevation if the depth of the dive is 4m?
*August 25, 2011*

**Algebra**

Sorry I forgot to put that the depth of the dive qas 4m. Somehow you need to figure out how to use the 11m and 4m in an equation.
*August 25, 2011*

**Algebra**

A diver dives from a platform with a height of 11 meters. What is the change in elevation of the dive?
*August 25, 2011*

**Algebra**

Adiver divies from a platform with a height of 11 meters. What is the change in elevation of the dive?
*August 25, 2011*

**Geometery**

thank you but how do you know the answer is d and not c?
*August 23, 2011*

**Geometery**

A circular region rotated 360 degrees around its diameter (serving as an axis) generates a a) cube b) rectangle c) cone d) sphere
*August 23, 2011*

**AP Chemistry**

I got 1054.9 as my answer. I reversed the first eq and did (1/K1^(1/2)) added it to reverse of second eq (1/K2) then added that to the 3rd eq times 2 (K3^2). This got me the right equation. Do I just multiply the new Kc values together to get the final Kc of the new equation?
*August 17, 2011*

**AP Chemistry**

Given: 2N2(g) +O(2) --> 2N2O(g) Kc =1.2x10^(-35) N2O4(g) --> 2NO2(g) Kc = 4.6x10^(-3) 1/2N2(g) + O2(g) --> NO2(g) Kc= 4.1x10^(-9) Calculate Kc for the reaction between one mole of dinitrogen oxide gas and oxygen gas to give nitrogen tetroxide gas.
*August 17, 2011*

**statistics**

You want to estimate the mean of a population within + 3 with 90 % confidence If the population standard deviation is = 8, how large of a sample is needed?
*August 14, 2011*

**History **

Can some one help me with these questions? Because Japan was hit by the worldwide economic depression in the 1930s, military leaders were able to gain power. Question 1 answers True False Question 2 text Question 2 After Japan withdrew from the League of Nations they aligned ...
*August 9, 2011*

**history **

What is the basic message of the Quran and when was it compiled.
*July 30, 2011*

**History **

How long did the roman civilization last?
*July 29, 2011*

**human resource management**

c
*July 19, 2011*

**chemistry**

the temperature of a 20.0g sample of a metal(specific heat .03 J/g-C) is raised by 20C. How much heat has been absorbed by the metal?
*July 13, 2011*

**Physics**

I am having trouble with the last portion of this question. If someone can help me, I would sincerely appreciate it. A bicycle wheel has a radius R = 32.0 cm and a mass M = 1.82 kg which you may assume to be concentrated on the outside radius. A resistive force f = 147 N (due ...
*July 9, 2011*

**Physics**

I am having trouble with the last portion of this question. If someone can help me, I would sincerely appreciate it. A bicycle wheel has a radius R = 32.0 cm and a mass M = 1.82 kg which you may assume to be concentrated on the outside radius. A resistive force f = 147 N (due ...
*July 7, 2011*

**Algebra II**

Give the equations of any vertical asymptotes for the graphs of the rational functions. f(x)=(x-4)/(x²+7)
*July 7, 2011*

**Math**

Simplify: (4 - 5i)(3 + 2i)
*July 3, 2011*

**algebra II**

Simplify (-3i)^2
*July 3, 2011*

**Math**

The sum of the degree measures of the angles of a quadrilateral is 360. Find the measure of the fourth angle of each quadrilateral given the degree measures of the other three angles. 4x+12, 8x - 10, 6x+5
*June 30, 2011*

**chemistry**

25 x 0.2 = 5 5/1000= 0.005 moles
*June 21, 2011*

**Algebra**

you start a pet sitting service. you spend $35 on advertising. You plan to change $5 on a day to watch each pet. a) write an equation to relate your daily income y to the number of pets x you watch. b) how many days do you need to watch a pet to pay for advertising?
*June 16, 2011*

**physics**

A mass is suspended on a spring scale. The scale shows a reading of 5N and stretches a distance of 0.2 meters from its relaxed length. 1)What is the spring constant of the scale? )If this scale was taken to a planet that has a mass 4 times larger than the earth and a radius 4 ...
*June 16, 2011*

**Physics**

A cessna plane flies with a speed of 150km/h relative to the air and points due east. A wind is blowing at a speed of 20km/h at 45 degrees south of east (ie the wind is blowing from the northwest). The resultant veloity of the plane relative to the ground is?
*June 14, 2011*

**Physics**

While peforming a concert , Queen plays at average intensity levels of 2 W/m^2. Then during a sudden loud part of the music, the amplitude of the sound waves , initially A1 increases by a factor of 5. By how many decibels does the sound level increase?
*June 13, 2011*

**human resources**

How does human resources help or hinder bussinessses
*June 2, 2011*

**Finance**

If you need help on a full paper..google termpapergurus..theyll help you out for sure!
*May 31, 2011*

**Accounting**

what exactly are we you asking for in this? are you asking for the journal entries?
*May 29, 2011*

**eco**

Suppose a person pays $80 of annual interest on a loan that has a 5 percent annual interest rate. The loan amount is: A. $400. B. $1,600. C. $160. D. $85. 10. Suppose a loan customer is considering two alternative $22,000 loans. Loan 1 requires payment of $1,100 of interest ...
*May 26, 2011*

**chem.**

metals and non-metals
*May 22, 2011*

**algebra**

A pack of Jillybeans contains seven different flavors: Apricot, Banana, Coconut, Date, Eggplant, Fig and Grape. You can make each flavor indivdually or come up with some crazy combinations. How many flavor combinations are possible with these seven flavors alone or mixed?
*May 22, 2011*

**science **

what is the process by which cells divide? please help thanks
*May 19, 2011*

**Anatomy**

A person needs to stop, rest, and take in enough oxygen to complete the catabolism of lactic acid and relieve the muscle?
*May 19, 2011*

**Anatomy**

For Muscles to work, they need a stimulus from a ____________ nerve and a source of energy that is ___________, is also known as __________.
*May 19, 2011*

**Physics**

A conduction heat wave is caused to pass through a metal bar of average temperature Tmean = 38.0 ¢XC, altering its temperature sinusoidally with an amplitude of Ti = 3.00 ¢XC. The equation which gives the temperature, T(x,t), of the metal bar at any place x (in ...
*May 18, 2011*

**Statistics**

The value of the correlation coefficient can be between 0 and 1.
*May 17, 2011*

**vibration**

a uniform cantilever beam of the total mass ml has a concentrated mass M at its free end. determine the effective mass of the beam to be added to M assuming the deflection to be that of a massless beam with a concentrated force at the end, and write the equation for its ...
*May 17, 2011*

**geometry**

Find the area of: A square with radius 9. (Please explain how you found it! Thanks!)
*May 10, 2011*

**geometry**

Find the area: A rectangle with length 12 inscribed in a circle with radius 7.5 (explain how you do it please! Thanks!)
*May 10, 2011*

**algebra**

Word problems confuse me. THe owner of a fancy food shoppe wants to mix cashews selling at $8/kg and pecans selling at $7/kg. How many kg of each kind of nuts should be mixted to get 8 kg worth $7.25/kg?
*May 10, 2011*

**MICROECONOMICS**

job that will increase your lifetime earnings by 300,000 but that requires an MBA
*May 6, 2011*

**math**

I GOT IT ITS 3
*April 26, 2011*

**math**

x^3 - 3x^2 + x Substitute 3 for x so i got 3^3 - 3(3)^2 + 3 27 - 3 - 9 + 3 24 - 9 + 3 15 + 3 18 Is this correct ??????????//
*April 26, 2011*