Friday
October 24, 2014

Posts by anonymous


Total # Posts: 73,132

Physics
Sanjay's air boat starts from rest and accelerates at 8.7 m/s2 for a distance of 176 meters. How fast is it moving at the end of the 176 meters?
October 18, 2014

Calculus
If G(x)=(x)/(1+2x), find G'(a) and use it to find an equation of the tangent line to the curve y=(x)/(1+2x) at the point (-1/4,-1/2). My answer: G'(a)=1/(1+2x)^2 Equation of tangent line: y= 4x+0.5
October 18, 2014

Calculus
A pebble is dropped from an open window 100 meters above the ground. a) What is the velocity of the pebble after 2 seconds? b) What is the velocity of the pebble when it hits the ground?
October 18, 2014

Calculus
Find the slope of the curve f(x)=1/(x^2+3). My answer: (-2x)/(x^2+3)^2
October 18, 2014

Calculus
The number of bacteria after t hours in a controlled laboratory experiment is n=f(t). Suppose there is an unlimited amount of space and nutrients for the bacteria. Which do you think is larger, f'(5) or f'(10)? If the supply of nutrients is limited,would that affect ...
October 18, 2014

Computer Science
class Employee{ public static void main(String[]args) { float hours; String lastName, firstName; char letter; float rate; boolean Y; boolean N; System.out.println("What is your first name?"); firstName = In.getString(); System.out.println("What is your family&#...
October 18, 2014

Calculus
The cost of producing x ounces of gold from a new gold mine is C=f(x) dollars. Do you think the values of f'(x) will increase or decrease in the short term? What about the long term? Explain.
October 18, 2014

Art
I am.
October 18, 2014

Algebra
(1990,52),(1992,55),(1994,59), (1996,63),(1998,66) With out calculating find a 2-year period that had a greater rate of chsnge than 1990-1992 explain your reasoning
October 18, 2014

Algebra
find the complex zeros of the polynomial. Write f in factored form: F(x)= 2x^2-5x^3-20x^2+115x-52=0
October 18, 2014

Algebra Help
Form a Polynomial f(x) Degree: 4, Zeros: 2+2i;-5, Multiplicity:2 f(x)=a(______________)
October 18, 2014

Spanish please?
to warn people of harm to protect men late at night to drive off evil spirits to care for people's children Discuss different things you can do in Punta del Este, Uruguay. Describe how the Pan American Games were established. 23. Give two reasons why the work of Marí...
October 18, 2014

Spanish Questions?
16. What makes Pan American Games different from the Olympic Games? some sports are unique, like jai alai they are celebrated every 2 years only Cuba can host them they are celebrated every 6 years 17. Which theory was developed based on observations made on the Galá...
October 17, 2014

algebra 1
4=18-3w 18 - 3w=4 +18 +18 -3w=22 7 1/3
October 17, 2014

biology
Part A. Making Visual Connections with the Textbook (5 points) You can answer these in a Word document, indicating the question number followed by your answer. Below is the Absorption Spectrum of Photosynthesis. As your textbook explains, plants have a number of light-...
October 17, 2014

Calculus
The number of bacteria after t hours in a controlled laboratory experiment is n=f(t). Suppose there is an unlimited amount of space and nutrients for the bacteria. Which do you think is larger, f'(5) or f'(10)? If the supply of nutrients is limited,would that affect ...
October 17, 2014

Calculus
The cost of producing x ounces of gold from a new gold mine is C=f(x) dollars. Do you think the values of f'(x) will increase or decrease in the short term? What about the long term? Explain.
October 17, 2014

Calculus
1. If the tangent line to y=f(x) at (4,3) passed through the point (0,2), find f(4) and f'(4). My answer: f(4)=3 f'(4)=1/4
October 17, 2014

computer literacy
A computer worm is most likely to attack
October 17, 2014

chemistry
Table salt, NaCl(s), and sugar, C12H22O11(s), are accidentally mixed. A 4.00-g sample is burned, and 3.30 g of CO2(g) is produced. What was the mass percentage of the table salt in the mixture?
October 17, 2014

Language arts
Which of the following exoresses a main idea from "Always to Remember"? A. Maya Ying Lin was a talented and smart college student who became a designer. B. Maya Ying Lin's family life, travel ecperiences, and education provided er a background necessary for a ...
October 17, 2014

MATH HELP PLEASE
Which statment is false? A. The number zero is a rational number. B. Some irrational numbers are also rational numbers. C. Every irrational number is a real number D. Every integer is a rational number Is the answer C?
October 17, 2014

Language arts
Which best describes Maya Ying Lin's design in "Always to remember" A. Place of healing, vertical like other monuments, durably made of stone. B. Harmonious with surrondings, place of healing, quiet memorial. C. Place of healing, political statement, quiet ...
October 17, 2014

physics
can u help me pleaseeeeee @Damon
October 17, 2014

MATH HELP PLEASE
Gee ok I get it please dont yell. Damon was sayigng what is the square root of 21 so I got confused
October 17, 2014

MATH HELP PLEASE
square root 21=4.582575695, so is the answer C? Because I do not understand what you are saying. C is the answer?
October 17, 2014

MATH HELP PLEASE
So the answer is 100000% D?
October 17, 2014

MATH HELP PLEASE
Which of these numbers can be classified as both real and irrational? a. 5.85 b. 63.4 c. square root 21 d. square root 36 Is the answer D?
October 17, 2014

Precalculus
(sinx-cosx+1)/(sinx+cosx-1)=(sinx+1)/(cosx)
October 17, 2014

math
Which of these numbers can be classified as both real and irrational? a. 5.85 b. 63.4 c. square root 21 d. square root 36 Is the answer D?
October 17, 2014

MATH HELP PLEASE
So The answer is D?
October 17, 2014

Algebra
-2+_2
October 17, 2014

SS
Is agriculture widespread in coniferous forest regions?
October 17, 2014

Pre-Calc/Trig...
thanks!!
October 17, 2014

Pre-Calc/Trig...
Helpp needed, this is sort of confusing me. Describe the nature of the roots for this equation. 2x^2-x+1=0 A. Two real, rational roots B. Two real, irrational roots C. One real, double root D. Two complex roots
October 17, 2014

Pre-Calc/Trig...
oh okay thank you!
October 17, 2014

Pre-Calc/Trig...
for number 2 the choices are: a. 25i b. 8i√5 c. -8i√5 d. -25i
October 17, 2014

Pre-Calc/Trig...
wait i just need help with number 2, i got number 1 which is 6i
October 17, 2014

Pre-Calc/Trig...
Help me please. Simplify 1. √-36 2. -√-625
October 17, 2014

Physics/ Biomechanics
Compare the vertical jump heights obtained using the vertical velocity at take off and half the flight time. Which one do you think is more accurate in assessing a vertical jump performance? - my vertical jump height using vertical velocity at take off = 0.28m - my vertical ...
October 17, 2014

mathematics
Fill up the missing values LENGTH=60cm BREADTH =45cm HEIGHT=? Volume=54 dm³
October 17, 2014

psy 103
Dubois claims that after the civil war, the courts and police forces led to the following outcomes
October 17, 2014

SS
Where is the Tree Stratum Zone of deciduous forests?
October 17, 2014

SS
Is the Okanagan in BC a valley?
October 17, 2014

Calculus
A tray of lasagna comes out of the oven at 200°F and is placed on a table where the surrounding room temperature is 70°F. The temperature T (in °F) of the lasagna is given by the function T(t)=e^94.86753-t)+70 , 0 ≤ t, where t is time (in hours) after taking ...
October 17, 2014

Thermodynamics
all wrong
October 17, 2014

Thermodynamics
jj
October 17, 2014

Thermodynamics
ooo
October 17, 2014

algebra 1
4=18-3w 18 - 3w=4 +18 +18 -3w=22 7 1/3
October 17, 2014

math
how many different combinations can you make using pennies, nickels, dimes, quarters, and the half dollar that equal 60 cents?
October 16, 2014

Please Help!!!
I can't figure it out
October 16, 2014

Science
Two football players collide head-on in midair while chasing a pass. The first player has a 100 kg mass and an initial velocity of 4.00 m/s in the positive x direction, while the second player has a 130 kg mass and initial velocity of 3.30 m/s in the negative x direction. What...
October 16, 2014

calculus
Find the point on the plane z = 6x + 9y + 1 closest to the point P = (1, 0, 0). Hint: Minimize the square of the distance. (x, y, z) =
October 16, 2014

calculus
find the coordinates of the centroid bounded by y=25x^2 and y=4. the region is covered by a thin flat plate
October 16, 2014

physics
a 1.00x10^3 kg car traveling at 22.5 m/s on level ground undergoes a perfectly inelastic collision with a spring loaded barrier (k= 8.00x10^3 N/m) weighing 1250kg. How much does the spring compress when they come to a stop? can someone help me set this up?
October 16, 2014

English
He wrote it Pros They could be free of Britain's quarrels with its European neighbors. · ·They would be free of obeying any laws set out by the British, especially the Intolerable Acts. · They could create their own democracy Cons · Some ...
October 16, 2014

science help
Yes, it's A.
October 16, 2014

physics
A torque of 12 N ∙ m is applied to a solid, uniform disk of radius If the disk accelerates at what is the mass of the disk?
October 16, 2014

math
A
October 16, 2014

Algebra
what is the area of a rectangle with a length that is 5 more than triple the width?
October 16, 2014

math
Equivalent of five thousandths
October 16, 2014

Ions and octet rule
Element Z3+ contains 31 protons. What is the identity, and how many electrons does Z3+ have.
October 16, 2014

college physics
two billiard balls of equal mass undergo a perfectly elastic collision. if the speed of one ball was initially 5.72 m/s and the other 1.64 m/s. what will their speeds be after the collision
October 16, 2014

physics
a net force of 72 n is applied to a 48 kg box starting from rest for 8 s. what is the final velocity of the box? I need someone to show me how to set up. thanks
October 16, 2014

physics
A 65 kg skateboarder is standing on a stationary .5 kg skateboard. the skateboarder steps off the a skateboard with a horizontal veolicty of 1.5 m/s. what is the recoil velocity of the skateboard ignoring friction? 
October 16, 2014

Science-Physics
A fireworks rocket explodes at height h, the peak of its vertical trajectory. It throws out burning fragments in all directions, but all at the same speed v. Pellets of solidified metal fall to the ground without air resistance. Find the smallest angle that the final velocity ...
October 16, 2014

algebra
A car be rented for $55 per week plus .25 per mile. How many miles can driven if you have at most $280 to spend for weekly transportation?
October 16, 2014

math
jills fish weighs 8 times as much as her parakeet. together the pets weigh 63 ounces. how much does the fish weigh
October 16, 2014

physics
When a jet lands on an aircraft carrier, a hook on the tail of the plane grabs a wire that quickly brings the plane to a halt before it overshoots the deck. In a typical landing, a jet touching down at 240 km/h is stopped in a distance of 95 m. What is the magnitude of the jet...
October 16, 2014

Math
What is the negative square root to 90 to the nearest integer? A. 3 B. -5 C. 7 D. -9 Is the answer D? Thanks
October 16, 2014

Math
Thank you
October 16, 2014

Math
What is the solution to the square root 8 to the nearest integer? A. 3 B. 5 C. 7 D. 9 Is the answer A? Thanks
October 16, 2014

Algebra
A stagecoach left Drygulch traveling east at 3 km per hour. Two hours later, another stagecoach left Drygulch traveling in the same direction at 40km per hour, How many hours had the first one been traveling when the second one caught up?
October 16, 2014

Algebra
A train left mooseport traveling west at 50 mph. One hour later, another train left mooseport traveling east at 70 mph. How many hours had the first train been traveling when they were 350 miles apart.
October 16, 2014

english 1
the concept of friends proves ironic in the poem
October 16, 2014

Chemistry
Oh so the decomposition HI is just Ea reverse? So it would be 139kJ?
October 16, 2014

Chemistry
1/2 H2(g) + 1/2 I2(g) -> HI(g) △H= +28kJ The activation energy for the formation of HI is 167kJ. The activation energy for the decomposition of HI is A. 28kJ B.139kJ C.167kJ D.195kJ I know it is an endothermic reaction.
October 16, 2014

Algebra
The length of a rectangle is 3 times the width. If the length is increased by 4 cm and the width is decreased by 1 cm,the parimeter would be 102 cm, find the dimensions of the original rectangle.
October 16, 2014

Algebra
An algebra book weighs 6oz less than twice as much as a grammar book. If 5 algebra books weigh the same as 8 grammar books, how much does an algebra book weigh.
October 16, 2014

Pre-Calc/Trig...
oh i see, how could i have forgotten!!
October 16, 2014

Pre-Calc/Trig...
Help me please. Solve the equation: (x-3)(x+2)=0 Enter the solution with the lowest value.
October 16, 2014

math
Of 320 consumers polled, some purchase Blu-ray movies, some only purchase movies on DVD, and some do both. If 300 people polled purchase Blu-ray discs and 280 purchase DVDs and Blu-ray discs, how many people only buy DVDs?
October 16, 2014

Advanced math
Find the original generating function in closed form for (1,2,3,4,5,...).
October 16, 2014

Advanced math
Show the number of partitions of n in which only odd parts may be repeated equals the number of partitions of n in which no part appears more than three times
October 16, 2014

Science-Physics
A car is moving at a constant 19.3m/s, and rain is falling at 8.9 m/s straight down. What angle does the rain make with respect to the horizontally observed by the driver?
October 16, 2014

arithmetic
what is the perimeter of a lions cage which is 12mlong and 5.5 wide
October 16, 2014

maths
320 students have food enough for 80 days. If after 20 days, 20 students leave. How many more days will the food last?
October 16, 2014

Advanced math
use integration to find the volume of a pyramid with heighs and square base witht of 6 unit and square base with sides of 4 units
October 16, 2014

ca;culus
Find the volume V of the region bounded by z = 240-60y, z = 0, y = 0, and y = 4 -x2
October 16, 2014

social studies
Can somebody help me on this? I don't know what to answer. Venn Diagram Write details that tell how the subjects are different in the outer circles. Write details that tell how the subjects are alike where the circles overlap. Subject: Squatter Settlement Subject: Migrant ...
October 16, 2014

calculus
Find the maximum and minimum values of f(x, y) = xy on the ellipse 8\!x^{2} + y^{2} = 9.
October 16, 2014

statistics
show me Police academy acceptance exams to qualify for a police academy, applicants are given a test of physical fitness. the scores are norally distributed with a mean of 64 and standard deviation of 9. if only the top 20% of the applicants are selected find the cutoff score?
October 15, 2014

Analytical Chem
The following electrochemical cell can be used to calculate the formation constant Kf for a metal and EDTA. The cell has a voltage of -0.262V. The right half cell contains a metal (M^2+) with a standard reduction potential of -0.236V. Calculate the Kf for the metal EDTA ...
October 15, 2014

physics
A diver leaves the end of a 4.0-m-high diving board and strikes the water 1.3 s later, 3.0 m beyond the end of the board. Considering the diver as a particle, determine:
October 15, 2014

physics
A block of mass m = 4.20 kg slides along a horizontal table with speed v0 = 9.50 m/s. At x = 0 it hits a spring with spring constant k = 62.00 N/m and it also begins to experience a friction force. The coefficient of friction is given by μ = 0.150. How far has the spring ...
October 15, 2014

Math
Looks like 27/48 inches to me.
October 15, 2014

math
90000 and 9000 500 and 50
October 15, 2014

Chem
choose the solvent below that would show the greatest boiling point elevation when used to make a 0.10m non electrolyte solution a.C6H6, Kb= 5.12 degree C/m b. CHCl3, Kb= 4.70 degree C/m c.CCl4, Kb= 29.9degree C/m d.CH3CH2OH, Kb= 1.99degree C/m e.CH3CH2OCH2CH3, Kb=1.79degree C/m
October 15, 2014

Math
True or false: as then number in the sample becomes larger and larger (assuming it means as the sample gets larger and larger), then the mean of the sampling distribution is equal to the population distribution for any normal population. Is it false? That it would be ...
October 15, 2014

Statistics
True or false: as then number in the sample becomes larger and larger (assuming it means as the sample gets larger and larger), then the mean of the sampling distribution is equal to the population distribution for any normal population. Is it false? That it would be ...
October 15, 2014

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