wally
Popular questions and responses by wally
Social studies
1. Why did Olmec farmers move their farms from time to time? A. As their families grew, people needed larger farms. B. Maya invaders took over their farmlands. C. Heavy rains flooded their fields and forced them to find new land. D. The
asked on October 13, 2018 
Social studies
1. Which feature makes the Mexican Plateau significant? A. It is home to most of Mexico's major cities. B. It is the most sparsely populated area of Mexico. C. It has the longest coastline in Mexico. D. It is the most arid region of Mexico. 2.Which
asked on October 25, 2018 
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.
asked on January 11, 2013 
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
asked on October 22, 2014 
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.
asked on December 11, 2014 
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?
asked on February 6, 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
asked on February 6, 2013 
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
asked on October 22, 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
asked on October 22, 2014 
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
asked on 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
asked on 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
asked on January 17, 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
asked on March 18, 2013 
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!
asked on February 19, 2012 
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
asked on March 4, 2011 
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
asked on March 21, 2013 
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
asked on June 8, 2011 
Physical Science
What is the name of the binary compound formed from potassium and iodine?
asked on May 15, 2008 
math show work please
111/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
asked on 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^2/40020x Where 0
asked on November 25, 2014 
Physical Science
Using the kinetic theory, explain why the pressure of a gas increases when its temperature increases.
asked on February 13, 2008 
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
asked on November 25, 2014 
Chemistry
What does Ca^(2+) + Na2CO3 create? What does Ba^(2+) + Na2CO3 create? What does Ba^(2+) + Na2CrO4 create? Thank You
asked on February 20, 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
asked on February 13, 2012 
math
Add parentheses to make this statement true. 63*7+4=33
asked on August 24, 2016 
math
sqrt(x) * 7sqrt(x)
asked on November 25, 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
asked on November 25, 2014 
Math
How would you get the exact value of the following problem: 29 * 6^(3x) = 11 Thanks!
asked on February 21, 2012 
bioloby
when members of a species are held by people in zoos or other conservation facilities is what
asked on September 24, 2008 
i logic
Truth tables can determine which of the following
asked on September 8, 2013 
biology
Why is water essential for light reactions?
asked on October 16, 2008

Profreading
邮件营销平台哪个好你知道?名气很大。有名的东西自有他的道理。你想知道,出类拔萃,并非偶然。 点击量
posted on January 3, 2019 
Social studies
I just need help with the last three
posted on October 13, 2018 
math
are you sure it isnt 7x^2 because you woulb be multply a x*7x =7x^2 or am i wrong
posted on November 25, 2014 
pre calc
thank you bottom is the correct way.
posted on November 25, 2014 
pre calc
actaully my teacher put 1995=0 i forgot to put that in the problem
posted on October 22, 2014 
pre calc
okay thank you
posted on October 22, 2014 
probability science
7/8
posted on February 7, 2014 
physics
you forgot to convert form from frequency to angular velocity where 197rpm=3.28rev/s*2pi apart from that the steps are accurate
posted on December 10, 2012