Saturday
October 10, 2015

# Posts by Jack

Total # Posts: 1,469

math
thank you mary
March 7, 2013

math
a square kitchen floor can be exactly covered withe square tiles that are either 9 inches or 15 inches on a side. what is the minimym area in square feet that the kitchen can have? how many of each size tile would be needed to cover the minimum size floor?
March 7, 2013

Geometry
A six foot person is walking away from an 18 foot pole. Express the distance between the pole and the person in terms of the length of the persons shadow.
March 5, 2013

math
A manager of an electronics store takes a random sample of large shipments of circuit boards to determine if he will accept the delivery. he randomly samples 20 boards from a shipment and will reject the delivery if more than 1 circuit board is defective. if the manufacturer ...
March 5, 2013

Chemistry
Hess's law _____. A.) makes it possible to calculate H for complicated chemical reactions B.) states that when you reverse a chemical equation, the sign of H does not change C.) determines the way a calorimeter works D.) describes the vaporization of solids Please help - I...
March 4, 2013

Chemistry
1. Hess's law _____. A.) makes it possible to calculate H for complicated chemical reactions B.) states that when you reverse a chemical equation, the sign of H does not change C.) determines the way a calorimeter works D.) describes the vaporization of solids Please help...
March 4, 2013

finance
if you want to have \$7000 in 10 years, how much money must you put in a savings account today? Assume the account pays 4% compounded daily.
March 3, 2013

Algebra 1
February 28, 2013

Algebra 1
A ladder is resting against a wall. The top of the ladder touches the wall at a height of 15 feet and the length of the ladder is one foot more than twice the distance from the wall. Find the distance from the wall to the bottom of the ladder. (Hint: Use the Pythagorean ...
February 28, 2013

physics
F is 208.42N normal is 125.14 N
February 27, 2013

23. Write the correct verb form in the blank: yo/encontrar. yo ___________ (2 points) 24. Write the correct verb form in the blank: ella/cerrar. ella ___________ (2 points) 25. Write the correct verb form in the blank: nosotros/querer. nosotros ___________ (2 points) 26. Write...
February 27, 2013

I don't know how to do these or I would have given answers or at least a good guess. Thanks.
February 27, 2013

23. Write the correct verb form in the blank: yo/encontrar. yo ___________ (2 points) 24. Write the correct verb form in the blank: ella/cerrar. ella ___________ (2 points) 25. Write the correct verb form in the blank: nosotros/querer. nosotros ___________ (2 points) 26. Write...
February 27, 2013

19. Your hermano mayor is A.) younger than you. B.) older than you. *C.) more powerful than you. D.) smarter than you. 20. Your hermana menor is *A.) younger than you. B.) older than you. C.) more powerful than you. D.) smarter than you. Thank You
February 27, 2013

Thank You. What do the numbered ones say?
February 27, 2013

I have no idea what the answers are to these. Thank You For questions 10-14, match the family members: A. el hijo de mis tíos B. la hija de mis padre C. la madre de mi padre D. la hermana de mi padre E. la esposa de mi padre 10. mi madre 11. mi tía 12. mi abuela ...
February 27, 2013

Spanish please translate from spanish to english
1.) ¿Cuál es la prima mayor? 2.) ¿Cuál es la prima menor? 3.) Es el doce de mayo. Es el 20 de agosto. Es el primero de diciembre. Es el uno de diciembre. 4.) Tiene doce años. Tienes doce años. Tengo doce años. Thank You so much
February 8, 2013

Please translate from spanish to english
La familia Gutierrez tiene dos hijos. Ramón tiene 15 años. Es el hijo mayor. Su cumpleaños es el veinte de agosto. Rogelio tiene 13 años. Es el hijo menor. El cumpleaños de Rogelio es el 1 de diciembre. Ramón y Rogelio tienen dos ...
February 8, 2013

Spanish
are my answers correct then or are you saying #4 is wrong?
February 7, 2013

Spanish
Thank You
February 7, 2013

Math help
They each brought 7 pets. hope this helps
January 29, 2013

Maths
A bouncy ball bounces 16m on its first bounce and then 8m on the second bounce. Each time it bounces the height halves. How high will the ball bounce on the 10th bounce?
January 29, 2013

Calculus
lim 1/(1+h)^2-1/h h->0 I have 1 as my final answer and was wondering if i was correct
January 28, 2013

Calculus
lim e^(1+h)-e/h h->0
January 28, 2013

science
The XYZ Company makes widgets and sells to a market that is just about to expand after a period of stability. As the year starts, the widgets are manufactured at a cost of \$0.75 and sold at a market price of \$1.00. In addition, the firm has 1,000 widgets in finished goods ...
January 27, 2013

chemistry
I got a very close answer, I just needed help with the steps, so thank you my friend.
January 22, 2013

chemistry
How much ice is required to cool a 15.0oz drink from 71 F to 34 F, if the heat capacity of the drink is 4.18 J/g*C ? (Assume that the heat transfer is 100% efficient.)
January 22, 2013

Science
Please compare and contrast the electrochemical events involved in the initiation and propagation of an action potential with the electrochemical events involved with the initiation of muscle contraction in skeletal muscle. Be sure to describe the electrochemical changes in ...
January 21, 2013

Calculus 2
A circular plate of radius r feet is submerged vertically in a tank of fluid that weighs w pounds per cubic foot. The center of the circle is k(k>r)feet below the surface of the fluid. Show that the fluid force on the surface of the plate is F=wk(πr^2). How to prove ...
January 18, 2013

coordinate algebra
Jon is flying an airplane.He is currently 3,5000 feet in the air and he is ascending at a rate of 500 feet per minute.How many minutes it will take him to reach a height of 9,000 feet
January 14, 2013

coordinate algebra
Jon is flying an airplane.He is currently 3,5000 feet in the air and he is ascending at a rate of 500 feet per minute.How many minutes it will take him to reach a height of 9,000 feet
January 14, 2013

Math
I am stuck on several probability questions. A spinner that has 15 equal sized sections numbered 1 to 15 is spun twice. What is the probability the spinner lands on an odd number and then on an even number? A. 56/225 B. 169/225 C. 1/15 D. 21/225 I chose A. 56/225 because 8/15 ...
January 11, 2013

chemistry
If 1.00 mole of BrCl is introduced into a 500.0 ml flask, what are the concentrations of Br2, Cl2 and BrCl at equailbrium
January 9, 2013

waiting times for 64 randomly selected walk-in customers and determined that their mean waiting time was 15 minutes. Assume that the population standard deviation is 4 minutes. The 90% confidence interval for the population mean of waiting times is
December 27, 2012

geometry
prove KLM=KNM.give reasons
December 13, 2012

statistics
A tobacco company claims that the nicotine content of its "light" cigarettes has a mean of milligrams and a standard deviation of milligrams. What is the probability that randomly selected light cigarettes from this company will have a total combined nicotine content...
December 11, 2012

statistics
A tobacco company claims that the nicotine content of its "light" cigarettes has a mean of milligrams and a standard deviation of milligrams. What is the probability that randomly selected light cigarettes from this company will have a total combined nicotine content...
December 11, 2012

Chemistry
Never mind! I got it! :)
November 30, 2012

Chemistry
Lead(II) oxide from an ore can be reduced to elemental lead by heating in a furnace with carbon. PbO(s) + C(s)= Pb(l) + CO(g) Calculate the expected yield of lead if 90.0 kg of lead oxide is heated with 90.0 kg of carbon.
November 30, 2012

Chemistry
An experiment that led to the formation of the new field of organic chemistry involved the synthesis of urea, CN2H4O, by the controlled reaction of ammonia and carbon dioxide. 2 NH3(g) + CO2(g)= CN2H4O(s) + H2O(l) What is the theoretical yield of urea when 100. g of ammonia is...
November 30, 2012

Chemistry
It is calculated that 0.0191 moles of CO2 are expected from a reaction at 25 degrees C and 1 atm. What volume of CO2 does this represent in cm3? (R = 0.0821 L atm / K / mol)
November 26, 2012

Maths - HELP PLZ
HOW CAN I SOLVE THE INEQUALITY GRAPHICALLY 3X^2 + 10X - 8 > 0 Any help would be appreciated
November 21, 2012

ALGEBRAIC METHOD
HOW CAN I SOLVE THE INEQUALITY GRAPHICALLY 3X^2 + 10X - 8 > 0
November 21, 2012

Physics
A long jumper leaves the ground at an angle of 24.3◦ to the horizontal and at a speed of 10.6 m/s. How far does he jump?
November 16, 2012

Write a MIPS assembly language program for the following for loop: Pseudocode: int x; # for(x=10; x>0; x--){ # printf("x=%d", 4x); #} In the program use the slt or slti instruction and sll
November 11, 2012

Write a MIPS assembly language program that will cover the following steps: Prompt the user to enter a first integer named i1 Prompt the user to enter a second integer named i2 Compute i1+i2-200 Print the value of the result Repeat The program should enforce the rule that the ...
November 11, 2012

biology
Identify the blood types arising from each of the progenitor cell types: a)Myeloid progenitor cells b)Lymphoid progenitor cells No one has answered this question yet.
November 10, 2012

Identify the blood types arising from each of the progenitor cell types: a)myeloid progenitor cells b)lymphoid progenitor cells
November 10, 2012

yep i got a full 100 with these answers
November 9, 2012

chemistry
when Zn0 becames Zn++, where do the 2 electrons that are lost come from?
November 8, 2012

Organic Chemistry
Why does crotyl chloride react faster than 1-chlorobutane in ethanol, since both are primary alkyl halides?
November 8, 2012

physics
You set out to design a car that uses the energy stored in a flywheel consisting of a uniform 97-kg cylinder of radius R that has a maximum angular speed of 330 rev/s. The flywheel must deliver an average of 1.70 MJ of energy for each kilometer of distance. Find the smallest ...
November 7, 2012

Chemistry
the density of H2 gas in a rigid container is 0.117 g/L at 55 C. what is the pressure of hydrogen in the flask if it is heated to 125 C?
November 5, 2012

Logic
Draw a flowchart for a program that reads a date in an 8-digit sequence (month, day, year) and determines if the date is a valid date. ignore leap year. Assume Feb has 28 days, and establish a table of days in a month so that you can access the appropriate month to determine ...
November 4, 2012

chemistry
A 15.0ml sample of NaCL solution has a mass of 15.78g.after the NaCL solution is evaporated to dryness, the dry salt residue has a mass of 3.26g. calculate the following concentrations for the %(m/m), % (m/v), molarity (M)
November 1, 2012

Cryptology 101
DES and AES are both “turn the handle” algorithms, in that they use repetition of some number of very similar cycles. What are the advantages to implementer, users, cryptanalysts of this approach?
October 31, 2012

Math
Julie is solving the equation x2 + 6x + 9 = 0 and notices that the discriminant b2 - 4ac has a value of 0. This tells her that the equation has
October 23, 2012

chemistry
how are the ionization energies evidence for the structure of the atom especially the electron configurations for atoms ?
October 23, 2012

Chemistry
144 g s8
October 13, 2012

newton's law
thanks but my instrutor dont want me to use energy to solve the problem since we havnt learn it yet, can you do it using newton's law?
October 13, 2012

newton's law
A block of mass M is projected up a frictionless inclined plane with a speed VO. The angle of incline is given as theta. a. How far up the plane does it go? b. How much time does it take to get there? I was stuck after Fg(cos(theta+90)= Ma_x gcos(90+theta)/M = a_x can someone ...
October 13, 2012

newton's law
Find the acceleration and tension in an Atwood's machine. Two different masses connected by a string over a pulley which is at rest.
October 13, 2012

Math.. how to get linear function
The total length y is a linear function of the tail length x with great accuracy. The domain is the interval from 30mm to 200mm, and the range is the interval from 200mm to 1400 mm. The following two points are given: X0= 60mm, Y0= 455mm, X1=140mm, Y1= 1050mm. Find the ...
October 13, 2012

two blocks of masses m1 and m2 (m1>m2) are placed on a frictionless table in contact with each other. A horizontal force of magnitude F is applied to the block of mass m1. if P is the magnitude of the contact force between the blocks, what are the net forces acting on m1 ...
October 11, 2012

Calculus
Thank you
October 8, 2012

Calculus
Given F(2)=1,F'(2)=5,F(4)=3,F'(4)=7 and G(4)=2,G'(4)=6,G(3)=4,G'(3)=8, find: a)H(4)if H(x)= F(G(x)) b)H'(4)if H(x)= F(G(x)) c)H(4)if H(x)= G(F(x)) d)H'(4)if H(x)= G(F(x)) e)H'4 if H(x)= F(x)/G(x) Please Help!
October 8, 2012

Calculus
Thank you
October 5, 2012

Calculus
Find the derivative of y=15x^7+7^x+22
October 5, 2012

Math
I had that as well, but I wasn't sure if you could break it down that way. I guess we will find out
October 4, 2012

Math
How do you make this true Using 48, 6, 2, and 5 =18 by using (+, -, x, or /)
October 4, 2012

Production & Operations Mgmt in Business
If someone could help me, I am truly desperate here. I am struggle with this problem. – Simple Linear Regression Applications Interpretation and Use of Computer Output (Results) (1) The management of an international hotel chain is in the process of evaluating the ...
September 30, 2012

AP Chemistry
A 34.05 gram liquid sample of an unstable compound is deposited in a metal piston assembly that has a cylinder with a diameter of 20.0 cm. After the sample is added, the piston is placed in contact with the liquid and the piston vent is closed. This process removes all ...
September 26, 2012

Physics
September 26, 2012

math
2x^2 + 5x - 8 = 0 Solve the quadratic equation by completing the square.
September 20, 2012

math
2x^2 + 5x - 8 = 0 Solve the quadratic equation by completing the square.
September 20, 2012

Math
Ally loves the beach and decides to spend the summer selling various ice cream products on the beach. From her account course, she knows that her total cost is calculated as Total Cost= Fixed Cost + Various Cost She estimates that her fixed cost for the summer season is \$50 ...
September 18, 2012

Physics
A major leaguer hits a baseball so that it leaves the bat at a speed of 28.0 and at an angle of 36.9 above the horizontal. You can ignore air resistance.At what two times is the baseball at a height of 9.50 above the point at which it left the bat?
September 17, 2012

Find the difference quotient by using f(x+h)−f(x)/h 1) f(x) = √(2x+1) answer (√(2x+1+2h) - √(2x+1))/h can you check please
September 16, 2012

precalculus
Find the difference quotient by using f(x+h)−f(x)/h 1) f(x) = √(2x+1) answer (√(2x+1+2h) - √(2x+1))/h can you check please
September 16, 2012

math
A piano manufacturer has a daily fixed cost of \$1200 and a marginal cost of \$1500 per piano. Find the cost C(x) of manufacturing x pianos in onde day. Use your function to answer the following questions: a)On a given day, what is the cost of manufacturing 3 pianos? b)What is ...
September 15, 2012

math
The cost in \$ of making "x" leaf blowers is given by C(x)=45x+6000. Each blower can be sold for \$60.00 a)find revenue function b)find equation that expresees that profit for selling "x" leaf blowers. c)How many units must be sold to break even?
September 15, 2012

US history
What was Florida name before call it Florida?
September 15, 2012

geometry
Rays PQ and QR are perpindicular. Point S lies i the interior of angle PQR. If the measure of the angle SQR=4+7a and the measure of angle SQR=9=4a, find the measure of angle of PQS and angle SQR.
September 12, 2012

Physics
A major-league pitcher can throw a baseball in excess of 46.6 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 16.3 m away from the point of release?
September 11, 2012

Physics
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck. The ball leaves the club at a speed of 16.8 m/s at an angle of 43.9° above the horizontal. It rises to its maximum height and then falls down to the green. Ignoring air ...
September 11, 2012

Physics
A skateboarder shoots off a ramp with a velocity of 6.8 m/s, directed at an angle of 56° above the horizontal. The end of the ramp is 1.1 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point ...
September 11, 2012

Algebra HELP!
Starting with the kinematics equation x = vot + ½ at^2, derive an expresion relating the acceleration and initial velocity of an object to two paired position and time measurements. In other words, if an object's position is x1 at t1, find the acceleration a and the...
September 11, 2012

US history
Indicate below the type of government each colony had in the year 1750. 1 NEW HAMPSHIRE; ROYAL 2 MASSACHUSETTS; ROYAL 3 CONNECTICUT; SELF-GOVERNING 4 RHODE ISLAND;SELF-GOVERNING 5 NEW YORK; SELF-GOVERNING 6 NEW JERSEY;ROYAL 7 PENNSYLVANIA;PROPRIETARY 8 DELAWARE; PROPRIETARY 9 ...
September 4, 2012

psycology
One consequence of providing an inaccurate opertional definition of the properties we intend to measure, is that the measurement will be: Invaild, Reliable, Valid or Powerful
August 26, 2012

social studies
If a bow with a draw weight of 60 kilograms were to fire at someone 5 meters away but the user had to roll first before drawing back and firing two arrows. Would the target have enough time to dive for cover behind a rock?
August 2, 2012

math
Using Cuisenaire rods, what is the unit rod if the purple rod represents 2/3?
July 29, 2012

Biomechanics
A ball is thrown vertically upwards in the air at a velocity of 50(m/s) and reaches a maximum height of 20(m). Calculate the time when the ball reaches the 10(m) mark, while going up and coming down. Use the following equation of motion: y(f) = y(i) + v(i)t+1/2at^2 y(f) and y(...
July 17, 2012

math
a-2/6 -5 = a+3/3 SOLVE FOR A solving equations with fractions
July 12, 2012

Physics
Please help me with my physics homework I've been given a week and can't for the life of me work out how it is done. Tom has a rubber ball which weighs 5 kilograms and bounces 3.8 meters from a drop height of 4 meters using this information please work out the mass of ...
July 6, 2012

Algebra
4x=8 and 5y=15 x=2 y=3 02.x+0.4y=1.7 and 8.3x-6.3y=-4.3 x=1.93 and y=1.31
June 10, 2012

Chemistry
g=.00461 ?
May 28, 2012

Chemistry
What mass of chromium II chlroide (CrCl2) is dissolved in 150.0mL of solution to prepare .250M solution? Please Help
May 28, 2012

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