Sunday
May 1, 2016

Posts by joe

Total # Posts: 2,405

Exponential Modeling
A species of frog’s population grows 24% every year. Suppose 100 frogs are released into a pond. How many frogs will there be in 5 years?
April 30, 2016

math
The Davidson family wants to expand its rectangular patio, which currently measures 15 ft by 12 ft. They want to extend the length and width the same amount to increase the total area of the patio by 160 ft2. Which quadratic equation best models the situation? A = lw (15)(12...
April 29, 2016

World History
Can somebody check over my answers my answers are : B;C;B;A;D;C;A;B;D;C;A;B;B;B;C;D;A;A;B;C;… C;D;1. Trench warfare caused the immobilization of troops on the (1 point)Western Front.Middle Eastern desert.Eastern Front.mountains in Russia.2. After the war, Britain ruled ...
April 20, 2016

Social Studies
Actually I like C
April 15, 2016

Social Studies
The Northwest Ordinance established all of the following, except rules for territories to become states. denying slavery to new states formed from the territory. preventing new states from entering the United States. the right to education (------my choice
April 15, 2016

Physics
A geostationary satellite orbits the Earth in such a manner that it is always directly above the same point on the equator as the Earth rotates. Assuming that this orbit is circular, what is its radius? (The mass of the Earth is approximately 5.97 × 1024 kg and the ...
April 15, 2016

chemistry
how many protons and electrons are in 7.4 grams of hydrogen?
April 13, 2016

Statistics
If a normally distributed group of test scores have a mean of 76 and a standard deviation of 10. Find the probability that student will earn a grade between 65 and 85
April 9, 2016

Math
Let $f(x) = \dfrac{2-3x}{5-2x}$. For what value of $a$ is $f(a) = 3$? Thanks!
April 3, 2016

Math
Let f(x) = 2-3x/5-2x. For what value of a is f(a) = 3?
April 3, 2016

Math
210 litres divided by 2 then divided by 2.5l per minute =42
March 30, 2016

Math
Given the points (A) 0,0 (B) 4,3 (C) 2,9 what is the measure of angle ABC
March 30, 2016

Math
If a square is 8.4 feet on each side. How many square feet is it
March 28, 2016

Chemistry
In a 1.0× 10–2 M solution of CH3NH3Br(aq), identify the relative molar amounts of these species. H2O, OH-, CH3NH3+, CH3NH2, H3O+, Br-, HBr
March 28, 2016

Physics
A 40.0 ohm resistor, 20.0 ohm resistor, and a 10.0 ohm resistor are connected in series across a 220-V supply. Which resistor is the warmest? a. 40.0 ohm b. 20.0 ohm c. 10.0 ohm d. they are all the same
March 18, 2016

Math
An object is launched at 9.8 meters per second from a 73.5-meter tall platform. The object's height s (in meters) after t seconds is given by the equation s(t)= -4.9t(-4.9t) - 9.8t = 73.5. When does the object strike the ground? I can't figure out how to factor it ...
March 11, 2016

Math
A woman bought some 13 cent stamps and some 8 cent stamps at the posg office. She spent exactly 1 dollar. How many of each stamp could she have bought?
March 11, 2016

Math
If sales tax in a specific county is 6.5%, what is the total price paid on a purchase of $156.00.
March 8, 2016

CHEMISTRY HELP
assume that 13.5g of AL react with excess HCl according to the following balanced equation, at STP: 2Al(s) + 6HCl(aq) ---> 2AlCl3 + 3H2(g) how mang liters of H2 at STP are produced?
March 6, 2016

Physics
Thank you!
March 3, 2016

Physics
A circuit consists of a 10 ohm resistor in series with 3 identical batteries each with an emf = 1.0V and internal resistance of 5 ohms. a) find potential difference between the terminals b) potential difference across the 10 ohm resistor c) power dissipated in resistor
March 3, 2016

Science
Calculate the amount of heat required to completely convert 1kg of water at 0°C to the boiling point at 100°C?
February 23, 2016

algebra
A hotel swimming pool measures 25 m by 9m. The hotel manager wants to put a 3m wide deck around the pool. Calculate the area of the deck
February 19, 2016

Calculus
Find the length of the entire perimeter of the region inside r=5sin(theta) but outside r=1. 1=5sin(theta) theta=arcsin(1/5) r'=5cos(theta) I tried the integral between arcsin(1/5) and pi-arcsin(1/5) of (((5sin(theta))^2+(5cos(theta))^2))^1/2 which gives me 13.694 Webworks...
February 19, 2016

Algebra: Check Answer
Okay, Thanks!
February 16, 2016

Algebra: Check Answer
one more: 3x^2 - 147 = 0 a) -47, 49 b) -7, 7 ~~MY ANSWER~~ c) -square root 7 , square root 7
February 16, 2016

Algebra: Check Answer
x^2 - 81 = 0 a) -square root 9 , square root 9 b) -81 , 81 c) -9 , 9 ~~ MY ANSWER ~~ d) no real solutions
February 16, 2016

Trig.
If TanTheta= -65/72 and the terminal side of theta lies in Quadrant II use a pythagorean identity to find sec theta.
February 13, 2016

Physics
A bullet of mass 3.9 g was fired at a stationary ball of lead. The head on impact moved the 10 kg ball at a velocity of .3703 m/s. If energy losses due to heat and internal energy are ignored. What was the speed of the bullet? a)370 b)950 c)549 d)975
February 13, 2016

Physics
A bullet of mass 3.9 g was fired at a stationary ball of lead. The head on impact moved the 10 kg ball at a velocity of .3703 m/s. If energy losses due to heat and internal energy are ignored. What was the speed of the bullet?
February 12, 2016

math
Write the equation of horizontal line passing trough the point (5, 2).
February 12, 2016

English
Okay, will do. I'll be back. Thanks!
February 11, 2016

English
Yes!
February 11, 2016

English
In The Importance of Being Earnest, Jack and Algernon clearly have a preoccupation with food. Discuss how food serves as a symbol for obedience to impulse and the pursuit of pleasure. How does this symbol help Oscar Wilde to comment on and satirize society?
February 11, 2016

Geometry
Could you please explain the difference between B, longer base of a trapezoid and b, base in geometry?
February 11, 2016

Geometry
Oh so we add 3X And the 3X to get 6X for EF ?
February 10, 2016

Geometry
For 2 similar triangles ABC and DEF, the scale factor of ABC to DEF is 2:3. If AB=2(BC) and DE=3(BC), what is EF?
February 10, 2016

math
If 210 people say pizza is their favorite food,how many people were surveyed using the graph if 42% chose pizza, 33% chose hotdogs, and 25% chose pasta?
February 8, 2016

Math
Bett, Cathy, Isabel, Lani and Ursula run an 800-meter race. Betty beat Cathy by 7 meters. Alma finished 12 meters behind Lani. Bettty finished 5 meters ahead of Ursula but 3 meters behind Lani. Isabel finished halfway between the first and last person. In what order did they ...
February 2, 2016

Chemistry
* 1" x 1" x 1/8"
February 1, 2016

Chemistry
A 1" x 1" 1/8" copper ingot has a density of 8.94 g/mL. 25 pellets were obtained from the ingot. Explain what would be the density of each pellet. I went ahead and found the mass of the ingot which is 1.1175g but I'm still stumped on what to do from there.
February 1, 2016

algebra
find the zeroes and state the multiplicity of multiple zeroes y=(x+1)^2 (x-1) (x-2) I know that x=-1 x=1 x=2 I dont know how to find the multiplicities
January 30, 2016

Physics
A thin metallic spherical shell of radius .5m has a total charge of 8 μC uniformly distributed on it. At the center of the shell is placed a point charge of 4 μC. What is the electric field at a distance of .15 m from the center of the spherical shell? I know that EA...
January 27, 2016

Physics
the pressure at a point below a point below the surface of the sea is caused by both the height of the water above that and the air pressure on the surface of the sea. if the diver reaches a depth of 20m below the surface on the surface of the sea Calculate The total pressure ...
January 26, 2016

Physics
A proton is released from rest inside a region of constant, uniform electric field E1 pointing due North. 14.8 seconds after it is released, the electric field instantaneously changes to a constant, uniform electric field E2 pointing due South. 8.07 seconds after the field ...
January 23, 2016

Algebra
could you at least tell me the steps i would take to finish it up
January 21, 2016

Algebra
Write y=-2/5x-3 in standard form using integers. 2x+5y=-15 2x+y=-3 2x+5y=-3 x+y=-15
January 21, 2016

Math
Write each fraction as a percent rounded to the nearest percent 1/3
January 15, 2016

Maths
There are 20 questions in a test. Faye answers 17 correctly. a. What fraction of questions does faye answer correctly? b. What percentage of the questions does Faye answer correctly?
January 14, 2016

Maths
Write < or > for each pair of numbers -6.9 is < or > -6.85 -7.02 is < or > -7.2
January 14, 2016

Maths
Work out 0.14 x 0.87 0.52 x 6.57 0.36 x 5.24
January 14, 2016

Maths
Round 4.389 to 2 decimal places.
January 14, 2016

Maths
Write the decimals in ascending order. 5.78, 5.08, 5.8, 5.287, 5.078
January 14, 2016

Maths
A figure skater scores 74.92 in her first skate and 144.19 in her second skate. What is the total score?
January 14, 2016

Maths
John has a piece of wood 2.4m lon. He cuts of a piece 0.8.4m long. How long is the remaining piece?
January 14, 2016

Math
It is 780 km from Lethbridge to Fort McLeod. One plane leaves from Lethbridge going 200 km/h. A second plane leaves from Fort McLeod going 300 km/h. When do they pass in the sky?
January 12, 2016

Algebra (Urgent)
What is an equation in slope intercept form for the line that passes through the points (1,3) and (3,1)?
January 7, 2016

Physics
The force on a .4 kg cannon ball in the barrel when fired at t=0 seconds is given by F= 1000- 5 * 10^4t. The acceleration of the ball is 0 as it leaves the barrel The total impulse in Newton seconds on the ball during the .02 seconds it's in the barrel would be
January 5, 2016

Language Art's
that's not really helpful for students who need at least a starter on their questions
January 5, 2016

Algebra
What is the ninth term of the arithmetic sequence defined by the rule A(n)=-14+(n-1)(2) A)232 B)230 C)2 D)4 Thanks
December 22, 2015

Mathematics
Using quotient rule find dy/dx of: y=(4+x)/(cos(x)) and find the equation of the normal to the curve y=(4+x)/(cos(x)) at the pint where x=0 Use y=mx+c form
December 14, 2015

Mathematics
Solve: (2+x)(-sinx)
December 14, 2015

physics
Jake needs to catch 1 10 pound fish to last 5 days. He catches 2 3.33 pound fish, 1 2.11 pound, and 1 1 pound fish. How long will he survive with that amount of food?
December 13, 2015

stat
A poll of 1000 registered voters reveals that 480 of the voters surveyed prefer the Democratic candidate for the presidency. At the 0.05 level of significance, do the data provide sufficient evidence to conclude that the percentage of voters who prefer the Democratic candidate...
December 13, 2015

stat
A poll of 1000 registered voters reveals that 480 of the voters surveyed prefer the Democratic candidate for the presidency. At the 0.05 level of significance, do the data provide sufficient evidence to conclude that the percentage of voters who prefer the Democratic candidate...
December 13, 2015

Math cosine law
I just finished the calculations and it gave me an answer of 160 m
December 9, 2015

Math cosine law
A golfer hits a tee shot on a 325 m long straight golf hole. The ball is hooked (hit at an angle of 18 degrees to the left. The ball lands 185 m from the tee. How far is the ball from the hole ?
December 9, 2015

Dynamics
A ball weighing .2 Lbs. is dropped out the window of a pickup truck (approx. 5 ft?) moving horizontally at 45mph. If e (coefficient of restitution) between the ball and the ground is equal to .6, find the height of the ball's first bounce and the horizontal distance it ...
December 8, 2015

math
can you list these fractions 1/6, 1/4, 1/3, 1/2, 2/3,3/4 and 5/6
December 3, 2015

Mathematics
Solve the inequality: (4x+3)/(x-1) ≤ 2
December 3, 2015

Physics
What is the difference between Electro-Motive-Force and Potential-Difference?
November 27, 2015

physics
water and glass with refractive index of 1.5 are interfaced.if the incident ray are from the water makes an angle 60 degrees with the normal.find the direction of the reflected and refracted rays(given that refractive index of glass to water=1.33)
November 25, 2015

Physics
A watch battery can supply approximately 15 C of charge before it needs to be replaced. Calculate the number of hours it will last if the current drawn by the watch is 0.50 micro-amps
November 24, 2015

Physics
An electrical motor has a power rating of 500 W when it is lifting a mass of 80 kg through a height of 6 m in a time of 15 s. Calculate the efficiency of the motor?
November 24, 2015

math
if I walk 2.5 miles in 1.25 hours, how long does it take to walk .5 miles?
November 23, 2015

writing
ok is that all you found wrong and thanks.
November 18, 2015

writing
n this discussion, you will post issues related to motivation and learning. Refer to the texts in this section, other texts you have read, and your personal experience and knowledge to support your ideas. Begin your discussion by addressing the following questions: What are ...
November 18, 2015

writing
MS.Sue Are you there. I need this done ASAP!!! please and thanks
November 17, 2015

writing
her's what i got for you cna you check it please Somethings that motivate people is money and something that they want like a guitar or something that as will motivate is the envy to be like other and when that will make them motivated. When someone makes and action that ...
November 17, 2015

writing
Yes im sorry if i write it will you proof and edit it
November 17, 2015

writing
In this discussion, you will post issues related to motivation and learning. Refer to the texts in this section, other texts you have read, and your personal experience and knowledge to support your ideas. Begin your discussion by addressing the following questions: What are ...
November 17, 2015

physics
A boy and girl are balanced on a "massless" seesaw. The boy has a mass of 75 kg and the girl a mass of 50kg. The seesaw is 6 meters in lenght with the pivot point between them...What are the distances each child must sit relative to the pivot point?
November 14, 2015

PHYSICSSS
The average velocity a golf ball hit with an iron is about 66.7 m/s. Calculate the maximum height and displacement of the golf ball if it is hit with a 45 degree 9 iron
November 8, 2015

fractions
thanks
November 6, 2015

fractions
But isn't it asking for the percent? Like the percent of 1/2 is 2/3? So 1/2 * 133% = 2/3?
November 6, 2015

fractions
what percent of 1/2 is 2/3 as mixed number
November 6, 2015

math
that isn't the point here..
November 6, 2015

math
.25 cents?
November 6, 2015

Biology (or math)
What is the surface area to volume ratio of a cube with a with of 4 cm. I think its 1.5:1
November 5, 2015

Math
A section of a boardwalk is made using 15 boards. Each board is 914 inches wide. The total width of the section is 144 inches. The spacing between each board is equal. What is the width of the spacing between each board? Write your answer in simplest form.
November 4, 2015

Computer programming
(Simplified Water Bill Computation) The bill for a water service subscriber is prepared as follows: 1. The name of the water consumer is entered 2. The previous water meter reading in cubic meters (reading last month) from the consumer’s meter is entered. 3. The present ...
October 30, 2015

science
in western united states: How many states border by ocean?
October 28, 2015

math
Gh
October 21, 2015

Math
a manufacturer has daily production costs of C=4000-30x+0.5x where C is the total cost in dollars and x is the number of units produced. (a) How many units should be produced each day to yield a minimum cost? (b) What is the minimum cost?
October 21, 2015

Math
5 basketball teams play each other once. How many games are played?
October 15, 2015

ENN103F
Require memorandums for 2013 and 2014 exam question papers
October 15, 2015

ENN103F
Comprehension India elections : domination of Nehru-Gandhi dynasty under threat Possible questions and answers on the passage
October 15, 2015

Logarithm help please
The intensity, I, of light passing through water can be modelled by the equation I=10^1-0.13, where x is the depth of water in metres. Most aquatic plants require a light intensity of 4.2 units for strong growth. Determine the depth of water at which most aquatic plants ...
October 14, 2015

Physics
A car decelerates uniformly and comes to a stop after 9 seconds. The car's average velocity during deceleration was 45 km/h. What was the cars deceleration while slowing down?
October 10, 2015

Language Arts (- Ribbons -)
Note, this question is from the book "Ribbons", if you haven't read it then you are not able to help with this. In "Ribbons", Stacy's grandmother stiffens and scolds her when Stacy tries to hug her. What does this show about the cultural differences...
October 5, 2015

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