Thursday
October 30, 2014

Posts by re


Total # Posts: 23

physics
What is the answer? I need it.
July 4, 2014

math
There are 5 options on the dessert menu at a restaurant. Erin and Ellen like all of the choices equally, so they each choose a dessert at random from the menu. What is the probability that Erin will choose apple pie and Ellen will choose strawberry cheesecake for dessert? ...
April 24, 2013

math
What is the third quartile, Q3, of the following distribution? 10, 25, 18, 31, 16, 27, 5, 13, 32, 24, 15, 21, 18, 18, 24, 4, 8, 11, 11, 23
February 26, 2013

calculus
Lim as x approaches 2 of (x^2-kx+4)/(x^3-8)
February 15, 2013

calculus
Lim as x approaches 2 of (x^2-kx+4)/(x^3-8)
February 13, 2013

chemistry
what would be the vapor pressure of water in a solution wiith 23.7g NaCl dissolved in 500mL of water at 50degrees centigrade
September 22, 2011

algebra 2
Solve the problem. The growth in the population of a certain rodent at a dump site fits the exponential function A(t)= 164e0.032t, where t is the number of years since 1975. Estimate the population in the year 2000.
July 12, 2011

algebra 2
Find the function value. Let f(x) = e3x. Find f(0.06), rounded to four decimal places.
July 12, 2011

Math
An instructor gives regular 20-point quizzes and 100-point exams in a mathematics course. Average scores for six students, given as ordered pairs (x,y) where x is the average quiz score and y is the average test score, are (18, 87), (10, 55), (19, 96), (16, 79), (13, 76), and...
March 7, 2011

chemistry
rank the following ionic compounds in order of increasing lattice energy NaF, Csl, CaO
March 3, 2011

math
how long does the equation od pi go on?
November 3, 2010

math
Graph the equation in the rectangular coordinate system. -5y = -40 How should the line be going?
February 9, 2010

math
Decide whether the relation is a function or not {(-4, -8), (-1, 2), (2, -2), (6, 1)}
February 9, 2010

Physics
It takes 180 kJ of work to accelerate a car from 21.0 m/s to 27.5 m/s. What is the car's mass? kg?
October 26, 2009

Math
3 Islands K,M, H= 5300 miles squared H 3293 miles squared larger than M M is 177 miles squared larger than K What is the individual areas of Islands
September 30, 2009

chemistry
A saturated solution was formed when 4.48×10−2 L of argon, at a pressure of 1.0 atm and temperature of 25 C, was dissolved in 1.0 L of water. Calculate the Henry's law constant for argon in mol/atm. I got an answer of 1.4*10^-3, maybe my units are wrong, idk ...
September 17, 2009

Chemistry
Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.6 L of water upon warming from 25 C to 50 C. Assume that the water is initially saturated with nitrogen and oxygen gas at 25 C and a total ...
September 17, 2009

Chemistry
A solution containing 26.40 mg of an unknown protein per 22.5 mL solution was found to have an osmotic pressure of 3.95 torr at 21 C. What is the molar mass of the protein?
September 17, 2009

physics
A hot-air balloon is rising upward with a constant speed of 2.95 m/s. When the balloon is 3.30 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?
September 14, 2009

physics
The drawing shows a force vector vector F that has a magnitude of 600 newtons. It lies at alpha = 67° from the positive z axis, and beta = 31° from the positive x axis. (that's the diagram given) webassign. (delete this space) net/CJ/p1-39alt.gif (a) Find the x ...
September 10, 2009

Physics
Two bicyclists, starting at the same place, are riding toward the same campground by two different routes. One cyclist rides 1490 m due east and then turns due north and travels another 1430 m before reaching the campground. The second cyclist starts out by heading due north ...
September 10, 2009

CHEMISTRY
Suppose that 1.01g of rubbing alcohol(C3H8O) evaporates from a 56.0g aluminum block. If the aluminum block is initially at 25'C, what is the final temperature of the block after the evaporation of the alcohol? Assume that the heat required for the vaporization of the ...
September 6, 2009

chemistry
How much energy is released when 48.5 g of water freezes?
September 6, 2009

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