Sunday
December 4, 2016

# Posts by rick

Total # Posts: 349

Physics
What is the ratio of the volumes for two black holes whose masses are 20 and 10 times the mass of the Sun, respectively? Assume the ’event horizon’ de?nes the edge of each black hole’s ’volume’
November 11, 2016

Physics
What is the reaction of the earth pulling down on a pen that is lying on a table
November 7, 2016

Physics
What is the reaction of the earth pulling down on a pen that is lying on a table
November 7, 2016

physics
A box slides down a frictionless 35 degree incline. Determine its acceleration. If the incline is 10.0 m long and the box starts from rest, how much time does it take to get to the bottom?
November 6, 2016

Physics
You must arrange three mystical stones in a line. They have masses 10.0 kg, 7.00 kg,and 3.00 kg. You place the 7.00 kg and 3.00 kg stones 5.00 m apart. Where do you need to place the 10.0 kg stone for the center of mass of the three stones to be 2.25 m from the 7.00 kg stone ...
October 30, 2016

Physics
A wire with cross sectional area 1.00 cm2 stretches 0.500% of its length when it is stretched with a tension of 20.0 N. What is the Young's modulus of this wire?
October 28, 2016

Physics
You push a block of mass m up a plane inclined at angle θ at constant velocity v with a force F parallel to the inclined plane. The coeﬃcient of kinetic friction between the block and the plane is µk. Which is the correct equation for F? (g = gravitational ...
September 24, 2016

health
Which of the following is NOT a type of muscle? A. Skeletal B. Long C. Smooth D. Cardiac
August 18, 2016

math
How many gallons of water are in a tank with a diameter of 40' and 12' tall ?
May 8, 2016

Physics
A boy with a mass of 40kg is seated a distance of 3.0m from the fulcrum of a seesaw. a. Calculate the load force exerted by the boy (Hint: What force is pulling him down?) b. Calculate the torque exerted by the boy. c. If his sister with a mass of 24 kg wants to balance the ...
April 28, 2016

Math
number of students in a class = 36 number playing cricket = 16 number playing football = 25 number playing both cricket and football = x write an equation for x how many students play both football and cricket
April 19, 2016

Algebra
(-5,3), (4,-5). Slope intercept form
March 2, 2016

Algebra
Y= 1/2x -5, (-3,-1)
March 2, 2016

Math
Y= -3x+2 (2,3)
March 2, 2016

math
4. A tree stands vertically on top of a hill whose angle of inclination is 30°. The top and base of the tree are 4√3 and 4 meters, respectively, from a point P at the foot of the hill. What is the angle of subtended by the tree at point P?
February 29, 2016

Algebra
.3928571 of a second
February 8, 2016

math
-4x<-64 4/5h>-2 solve each inequality
January 25, 2016

math
a store manager is accipting applications for part time workers. He can hire no more than 14 people. So far he has hired 9 people. Write and solve an inequality to determine how many more people the manager can hire
January 25, 2016

math
-5+b<-19 solve inequality and graph
January 25, 2016

algebra
solve inequality and graph a-1/4 > 5 3/4
January 24, 2016

algebra
I need an example how to graph for an inequality solution. eq. 5<x+31
January 24, 2016

algebra
graph inequality k<-1
January 24, 2016

Math
January 23, 2016

Math
Question: Name a fraction between 1/4 and 5/16
January 23, 2016

algebra
Draw a rectangle to show that 5 (x + 2 ) and 5x + 10 are equivalent ?
January 4, 2016

math
written in math would be -1(2x+3)=2(-4x-3) -2x-3=-8x-6 -3=-6x-6 3=-6x -0.5=x
October 28, 2015

math
If I had to spinners what the possibility of the spinner adding up to 5. If the spinner only had the numbers 1,2,or3.
October 7, 2015

math
Pat worked 43 hours and received \$7.25 per hour for regular pay and time-and-a-half for all hours over 40 hours. What were her weekly earnings?
September 24, 2015

Math
Find the length of the curve r(t)=sqrt(2)ti + e^tj + e^-tk, 0<=t<=1 Please explain how it happened. Thank you
July 6, 2015

English 4
Is it Bounderby?
April 27, 2015

functions
The estimated value of the Mona Lisa was about \$100 million in 1960. By the year 2000 its value had increased to approximately \$600 million. Write a straight line appreciation equation for the painting where y is the approximate value in millions of dollars and x represents ...
April 21, 2015

Maths
A movie theatre seats 200 people. For any particular show, the amount of money, m, the theatre makes is a function of the number of people, n, in attendance. If a ticket costs \$12 and the cost to the theatre to run one show is \$120, state the domain and range of this function.
April 21, 2015

number of 5s = 7 number of 8s = 26 check 243 number of 5s = 15 number of 8s = 21 check 243 number of 5s = 23 number of 8s = 16 check 243 number of 5s = 31 number of 8s = 11 check 243 number of 5s = 39 number of 8s = 6 check 243 number of 5s = 47 number of 8s = 1 check 243 ...
April 16, 2015

math
a model rocket is projected straight upward from the ground level. It is fired with an initial velocity of 192 ft/s. How high is the rocket after 10 seconds? When is the rocket at a height of 432 feet? What is the maximum height of the rocket? When will the rocket hit the ground?
April 9, 2015

math
a model rocket is projected straight upward from the ground level. It is fired with an initial velocity of 192 ft/s. How high is the rocket after 10 seconds?
April 9, 2015

algebra
(x^-3+y^-1)/x^-2
April 7, 2015

algebra
x^2-9y^2/xy/1/y-3/x
April 7, 2015

geometry
Two sides of a triangle are 22 and 34.The length of the third side must be greater than ____ and less than ____.
April 3, 2015

geometry
The degree measures of the angles of triangle ABC are represented by 2x+8,x-8 and 2x-20,state the measure of each angle
April 3, 2015

statistics
A couple considering a mortgage of \$100,000 have a choice of loans. One loan is an 8% loan for 20 years, and the other loan is at 8% for 30 years. Find the amount of interest that the couple can save by choosing the 20-year loan.
November 4, 2014

second degree equation word problem
A theater that is rectangular in shape seats 720 people.The number of rows needed to seat the people would be 4 less if each row held 6 more people.How many people would then be in each row?
October 25, 2014

Calculus
400 feet of fencing is to be used to enclose four adjacent pieces of land. What dimensions will produce the largest area?
October 25, 2014

english 1
What is one way that “The Maori: Genealogies and Origins in New Zealand” contrasts with “The Raven and the First Men: The Beginnings of the Haida”?
October 24, 2014

Physics
A man (mass 120.5 kg) is canoeing with his friend (mass 81.6 kg). He had the only paddle but dropped it in the lake. It has drifted just out of his reach along the long axis of the canoe. His friend suggests that if they trade places he might be able to reach the paddle. The ...
October 20, 2014

Physics
A 1kg pigeon sits on the middle of a clothesline whose supports are 10m apart. The clothesline sags by 1 meter. If the weight of the clothesline is negligible, find the tension in it.
September 9, 2014

Physics
A 1kg pigeon sits on the middle of a clothesline whose supports are 10m apart. The clothesline sags by 1 meter. If the weight of the clothesline is negligible, find the tension in it.
September 9, 2014

calculus
dinesh bro... the b is the same as the a
September 3, 2014

Calculus
use the simpson's rule with n=10 to estimate arc length of y=x^(-1/3), for 1<=x<6
July 31, 2014

Chemistry
10. For the titration of 20.00 mL 0.1000 M lactic acid with 0.1000 M NaOH, calculate the pH: a. before any titrant is added b. 10.00 mL prior to the equivalent point c. at the equivalent point d. 10.00 mL after the equivalence point. Plot the points obtained on a graph of pH ...
June 22, 2014

Chemistry
A 5.00 mL aliquot of vinegar (acetic acid, FW = 63 g/mol) was diluted and titrated with 0.1104 M NaOH requiring 32.88 mL. If the vinegar has a density of 1.055 g/mL, calculate its acidity as % acetic acid
June 22, 2014

physics
an electron is accelerated from rest through a potential difference V. If the electron reaches a speed of 9.11*x10^6 m/s, what is the potential difference?
May 13, 2014

psychology
Much research is being conducted on repairing faulty sensory organs through devices such as personal guidance systems and eyeglasses, among others. Do you think that researchers should attempt to improve normal sensory capabilities beyond their “natural” range (for ...
May 13, 2014

Math
A basket of goods and services representative of the CPI cost \$2750 when the CPI stood at 118.3. What did the basket of goods cost 10 years earlier, when the CPI was at 93.1? What was the overall percent inflation experienced by consumers for the entire 10-year period?
May 3, 2014

math
1)5 [19+ (5^2-16) ^2] ^2 2)(7m^3-m-6m^2+10)-(5m^3-9+3m-2m^2) 3) 3 (a-2)(4a+1)-5(2a+3)(a-7) 4)6a^2b/-2ab^2 5) 120(1+i) ^2+180(1+i) ^3 /360(1+i)
May 3, 2014

Physics
A space probe has two engines. Each generates the same amount of force when fired, and the directions of these forces can be independently adjusted. When the engines are fired simultaneously and each applies its force in the same direction, the probe, starting from rest, takes...
February 12, 2014

math
what is th value of 4!
January 9, 2014

Physics Help..
The cable of an elevator of mass M = 1900 kg snaps when the elevator is at rest at one of the floors of a skyscraper. At this point the elevator is a distance d = 10.6 m above a cushioning spring whose spring constant is k = 8500 N/m. A safety device clamps the elevator ...
December 30, 2013

math
the slope of a mountain if 10, 560 feet lenghth and 5,280 feet widthe
November 8, 2013

Logic
Having trouble with these two 1. 1 ~J 2 (B ⊃ M) ⊃ (~J ⊃ B) 3 ~J ⊃ (B ⊃ M) / B 2. 1 ~L 2 V v (A v L) 3 (V v A) ⊃ ~V / A
October 12, 2013

physics
A ball is thrown 107 m upward and then falls back to earth. Neglecting air resistance, how long will it be in the air? The acceleration of gravity is 9.8 m/s2 . Answer in units of s
October 5, 2013

algebra
can i get help with this question please solve by completeing the square 1/2x^2 -7x=16
October 3, 2013

algebra
October 2, 2013

philosophy logic - math
Natural Deduction Proof 1. 1 ~Y ⇒ ~L 2 W v ~Y 3 W ⇒ ~B / ~B v ~L 2. 1 ~U • (G = ~T) 2 (~U v D) ⇒ (W • ~R) / W • ~U 3. 1 (M ⇒ P) ⇒ ~P 2 H ⇒ P 3 M ⇒ H / ~H 4. 1 ~Z 2 S 3 Zv(S ⇒ H) / H
September 29, 2013

philosophy logic
Natural Deduction Proof Help? Having trouble with these two 1. 1 ~Y ⊃ ~L 2 W v ~Y 3 W ⊃ ~B / ~B v ~L 2. 1 ~U • (G = ~T) 2 (~U v D) ⊃ (W • ~R) / W • ~U
September 28, 2013

Im sorry here is the problem rewritten X^3 -2x^3 + 3x-1 : X^2-x+4 I have to get the sum diff and product and it kicking my tail i think i keep doing it wrong can someone please help me
September 21, 2013

polynomials
can someone please help me with this problem I have to get the sum diff and product I keep trying to work it out but i really think im blowing it. x^3- ¡¼2x¡½^2 + 3x-1 ¡Ã x^2- x+4
September 21, 2013

polynomials
Can someone check my answer please i don't know if I am doing this right x^ (2):x= sum (x^2 )+ (x)=x^2+x diff (x^2 )-(x)= (x^2-x) Product (¡¼x)¡½^2 (x)=x^2^x
September 20, 2013

polynomials
can someone help me with this crazy problem please I have to do the sum diff and product for class x^3- ¡¼2x¡½^2 + 3x-1 ¡Ã x^2- x+4
September 20, 2013

algebra
how do i solve this v= 4/3 πx^3
September 16, 2013

algebra
can someone help me with this please 2/3 ãx =8
September 15, 2013

algebra
how do i solve ã(x+4) =y+2 solve for x.
September 15, 2013

math
The average temperature for the month of April is 65 degrees. The temperatures ranged from 12 degrees warmer or colder. Write and solve an absolute value equation to represent this information. Write you answer in a sentence format to explain your answer.
July 20, 2013

multiplying
15xy (x=y)
July 13, 2013

Algebra
A goldsmith has two gold alloys. The first alloy is 20% gold; the second alloy is 60% gold. How many grams of each should be mixed to produce 40 grams of an alloy that is 30% gold? amount of 20% gold_____g Amount of 60% gold_____g
June 1, 2013

marketing
The marketing manager at Massimino & McCarthy, a chain of retail stores that sells men's clothing, is reviewing marketing research data to try to determine if changes in marketing strategy are needed. Which of the following sources of data would be a secondary data source?
May 30, 2013

Phoenix
Projectile motions problems are some of the most important problems you will encounter in this course. Through this discussion, we will solve a projectile motion problem step by step Assume a projectile is launched from ground height over a flat plane, at an angle of 50 ...
May 10, 2013

Math
An individual has 25000 to invest. As their financial consultant, you recommend investing in Treasury Bills earning 7%, Corporate Bonds earning 9% and Junk Bonds earning 11%. Find all the investment alternatives that will earn \$2000 per year.
May 1, 2013

Math
9 x 5 adults + 7 (8-5)= 66 45 + 7 (3)kids = 66 45 + 21 = 66 Now I found 5 adults by multiplying 9 x 5=45 just because that's the only way I know... Now I have no idea how to find x other than that. I am trying to help my 3rd grader with that. Please help.
April 30, 2013

math-high school
If the probability of an event happening is 2/5, then the probability of the event not happening is 3/5? This is False. The answer is 1/3. Explain why the answer is 1/3
April 25, 2013

chemistry
which metal react most vigorously? metals aluminum, copper, magnesium, lead, tin, zinc 1. which metal will react most quickly? 2. which will take the longest time to react? 3. which will react most vigorously and least vigorously? 4. list metals from order of least to most ...
April 18, 2013

thanks.
March 26, 2013

Need help to explain to my daughter: A horsepower is the power needed to lift 33,000 pounds 1 foot in 1 minute. It is equivalent to 746 watts. Express 525 watts as a portion of a horsepower both as a fraction and a decimal rounded to the nearest thousandth. Thanks for anyone&#...
March 26, 2013

math
1 can OJ is 15% 1 can is 10% how many liters of each should be mixed together to get 5 liters at 13%
March 4, 2013

Physics
Posted by Dan on Thursday, February 21, 2013 at 11:17pm. Plane flying southwest at 155mi/hr. their is a wind from the west at 45.0mi/hr. what's the planes new velocity
February 22, 2013

Net ionic reaction
What is the net ionic equation of MgS04 with Sr(N03)2? I get most of the equation right but i think im missing something...
February 11, 2013

ETSU
How much work is done when a force of 800.0 N is exerted while pushing a crate across a level floor for a distance of 1.5 m
February 9, 2013

math
Two similar rectangular gardens have a ratio of 2:3. If one side of the larger garden is 18 feet, how long is the corresponding side of the smaller garden?
January 30, 2013

math
Two similar rectangular gardens have a ratio of 2:3. If one side of the larger garden is 18 feet, how long is the corresponding side of the smaller garden?
January 30, 2013

algebra
how did you get 40 hours?
January 2, 2013

math
Gemma has to complete her chores for the week. She must finish 10 hours of chores to receive her allowance. She can work on landscaping for 2 to 8 hours. She can also do laundry for 4 to 6 hours. Determine the graph that correctly represents this system of inequalities. PLEASE...
December 19, 2012

a state of indiana lotto ticket pays winners \$0, \$5, \$25, and \$200 with probabilities of 0.94, 0.03, 0.02, and 0.01 respectivley. the expected value of this ticket is
December 10, 2012

physics
A projectile is shot straight up from the earth's surface at a speed of 1.50×104 .
November 30, 2012

Physics
A man lies on a plank of negligible mass supported by two scales 2.50 m apart. His head rests on the left scale which is also the axis of rotation. If the left scale reads 290 N and the right scale reads 122 N calculate his mass.
November 27, 2012

Final Global Business Plan Paper and Presentation for paraguau
November 12, 2012

math
7/12, 14/30 approximation which is greater
November 1, 2012

geometry
I have a 20 qyestuon assigment that its due tomorrow,but i need help on this question. Determine if the conjecture is true or false.If its false give a conterexample. Given: two angles are supplementary. Conjecture: one angle is obtuse and one is acute. please help me!!!
September 18, 2012

geometry
I really need help on this question: Determine whether each conjecture is true or false.Give a counterexample for any false conjecture. Given:Wx=XY Conjecture:W,X,Y are collinear. PlEASE HELP!!!
September 12, 2012

geometry
August 28, 2012

geometry