Saturday

December 20, 2014

December 20, 2014

Total # Posts: 34

**math show work please**

a bacteria colony doubles in 7hrs. How long does it tae the colony to triple Use N=No2^t/T. where No is the intial number of bacteria and T is the time in hours it take the colony to double.
*December 11, 2014*

**math show work please**

1/(X+3)+4/(x+5)= 2/(x^2+8x+15) a. the solution set is b. the solution set is all real numbers c. the solution set is empty
*November 25, 2014*

**math show work please**

1-11/x+30/x^2=0 A.the solution set is ? B.The solution set is the set of real numbers or C. the solution set is an empty set
*November 25, 2014*

**math**

are you sure it isnt 7x^2 because you woulb be multply a x*7x =7x^2 or am i wrong
*November 25, 2014*

**math**

sqrt(x) * 7sqrt(x)
*November 25, 2014*

**pre calc**

thank you bottom is the correct way.
*November 25, 2014*

**pre calc**

at a single ticket booth, customers arrive randomly at a rate of x per hour. the average line length is given by F(x)= x^2/400-20x Where 0<= x <20. To keep the wait in line reasonable, it is required that the average line length should not exceed 10 customers. Determine ...
*November 25, 2014*

**pre calc**

the volume of a gas varies inversely as its pressure and directly as its temperature. A certian gas occupies a volume of 2.3L at a temp of 380 K and a pressure of 20 N/cm^2 find the volume when the temp is 342 K and the pressure is 10 N/cm^2
*November 25, 2014*

**pre calc**

population of city has varied considederably in recent years. the data it the relates the pollution P to time t, in years, where t=0 correponds to 1990. use a quadratic function fitted to the data to predict the population in 2000 data: year,t population P 1990(t=1) 59,000 ...
*October 22, 2014*

**pre calc**

okay thank you
*October 22, 2014*

**pre calc **

A coin is tossed upward from a balcolny 370 ft high with an initial velocity of 16 ft/sec. during what interval of time? will the coin be at a height of atleast 50 ft (h= -16t^2 +vot + h0) is the answer 0>= t<+5
*October 22, 2014*

**pre calc**

actaully my teacher put 1995=0 i forgot to put that in the problem
*October 22, 2014*

**pre calc**

The following polynomial approximates the rabbit population in a particular area.? R(x)= -0.121x^5+2.952x^4+3500, where x is the number of years frm 1975. use a graphing calculator to describe the rabbit population from the rears 1975 to 1990. how do you get started with this ...
*October 22, 2014*

**probability science**

7/8
*February 6, 2014*

**i logic**

Truth tables can determine which of the following
*September 8, 2013*

**statistics**

The standard score for hours spent online at home for minnesotan was 3.00 approximately how many hours do minnsotan adults spend online at home? Show your work and round all cuclulation to the tenth
*March 21, 2013*

**physics**

A 7·cm tall candle is placed 125·cm from a lens with a focal length of +25·cm. Note: enter the absolute value of your answers for all distances and heights ... use the signs to determine the type and orientation of the images. a) How far from the lens will...
*March 18, 2013*

**physics**

A trapeze artist sailing through the air rotates with a rotational speed of 0.9·rev/s. If she contracts to reduce her rotational inertia to one sixth of what it was, what will her new rotational speed be? _____ rev/s? Can she completely stop her rotation while still ...
*February 6, 2013*

**physics**

Consider a 9·kg disk with a radius of 0.9·m and rotating about an axis passing through its center. (a) What is its rotational inertia? ______ kg·m2 ? (b) Suppose the disk is rotating counterclockwise and speeding up with a rotational acceleration of 4&...
*February 6, 2013*

**physics**

A hydraulic jack is used to lift a 2000 pound car. If the output piston (the one the car is sitting on) has an area of 60 square inches, how much force must be applied to the 0.5 square inch input piston to lift the car? ____ pounds?
*February 6, 2013*

**physics**

A 800·kg elevator is attached to a cable whose tension is 7800·N. Which of the following statements could describe the motion of the elevator? Choose all that apply. slowing down as it moves upward moving upward at constant speed speeding up as it moves downward ...
*January 17, 2013*

**physics**

You are pushing a box up an inclined ramp. The force you exert on the box is 19·N up the ramp. The weight of the box is 100·N straight downward. The force friction exerts on the box is 8·N down the ramp. The normal force exerted on the box by the ramp is ...
*January 17, 2013*

**Business Math**

Al Smith, who lives in Territory five, carries 10/20/5 compulsory liability insurance along with optional collision that has a $300 deductible. Al, who was at fault in an accident, caused $4,000 damage to the other auto, as well as $900 damage to his own. Also, the courts ...
*January 11, 2013*

**physics**

you forgot to convert form from frequency to angular velocity where 197rpm=3.28rev/s*2pi apart from that the steps are accurate
*October 7, 2012*

**Math**

How would you get the exact value of the following problem: 29 * 6^(-3x) = 11 Thanks!
*February 21, 2012*

**Chemistry**

What does Ca^(2+) + Na2CO3 create? What does Ba^(2+) + Na2CO3 create? What does Ba^(2+) + Na2CrO4 create? Thank You
*February 20, 2012*

**Math**

Can you help me set up this problem please P(t) = 100/1+48.2e^-0.52t If the company's claim is true, how many months will it take to have mastered 80% of the program. I just need help setting it up Thanks!
*February 19, 2012*

**Chemistry**

In my experiment I heated some oxide of tin, in order to figure out its empirical formula. How would the empirical formula be affected if the oxide was not heated to dryness? Also If some oxide splattered out of the container, how would this affect the calculated ration of the...
*February 13, 2012*

**relativity **

A particle called neutral pi meson (or pion) decays into two photons and nothing else. If the pion is initially at rest (rest mass 135Mev). (a) what are the energies of the photons ? (b) What are the magnitudes of the momenta of the photons (c) How are they moving with respect...
*June 8, 2011*

**Computer Science**

I need to write a program to solve for the following: Suppose that the file USPRES.txt contains the names fo the frist 43 United States presidents and the file USSENATE.TXT contains the names of all former and present US Senators. Write a program with nested loops that uses ...
*March 4, 2011*

**biology**

Why is water essential for light reactions?
*October 16, 2008*

**bioloby**

when members of a species are held by people in zoos or other conservation facilities is what
*September 24, 2008*

**Physical Science**

What is the name of the binary compound formed from potassium and iodine?
*May 15, 2008*

**Physical Science**

Using the kinetic theory, explain why the pressure of a gas increases when its temperature increases.
*February 13, 2008*

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