Monday
June 27, 2016

Posts by Zach

Total # Posts: 376

Math
The 3 digit number in which the ones digit is three times the tens digit and the tens digit is three times the hundreds digit is?
June 26, 2016

math
A 97​-cm board is cut into two pieces. If one piece is 35 cm shorter than the​ other, how long are the two​ pieces?
March 9, 2016

Science
1.) when might preserved remains of an entire organism form? A.) when sediment buries the hard part of an organism B.) when an event such as a quick burial or freezing preserves an entire organism ******* C.) when minerals replace parts of an organism D.) when a thin layer ...
February 29, 2016

Science HELP PLS
how are earth and venus similar? how is venus different from earth? provide two similarities and two differences
February 26, 2016

AP Chemistry
If 400 mL of 3.5 molar HCl solution is added to 200 mL of 2.3 molar NaOH solution, what will be the molarity of NaCl in the resulting solution? Answer in units of M.
February 24, 2016

Social Studies
where is the moon when you are in a location experiencing a low tide
February 20, 2016

Social Studies
more into detail please
February 15, 2016

Social Studies
how did the europeans feel about the founding of america
February 15, 2016

Math
Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol
January 29, 2016

Math
Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol
January 29, 2016

Math
Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol
January 29, 2016

Math
Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol
January 29, 2016

Math
Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol
January 29, 2016

physics
You are on a hike in the mountains. You have 3.03 km left to go before your next campsite. The sun will set in 5.2 h. What average speed must you walk to get to camp at sunset? Answer in units of km/h.
January 4, 2016

Science
Describe circular motion. Which of Newton's laws helped you describe circular motion Plz I need help fast, thx!!
December 15, 2015

Physics
In a perfectly insulating container, what is the equilibrium state (temperature and phases) if one mixes 475 g of water vapor at 140 degrees Celsius with 25 g of ice at 0 degrees Celsius?
December 12, 2015

physics
Two blocks are arranged at the ends of a massless string as shown in the figure. The system starts from rest. When the 4.01 kg mass has fallen through 0.412 m, its downward speed is 1.3 m/s. The acceleration of gravity is 9.8 m/s 2 .
December 9, 2015

physics
What is the frictional force between the 5.66 kg mass and the table? Answer in units of N.
December 9, 2015

physics
What is the magnitude of F? Assume the acceleration due to gravity is 9.8 m/s 2 and the surface is frictionless. Answer in units of N.
December 9, 2015

physics
A load of 66 N attached to a spring hanging vertically stretches the spring 8.3 cm. The spring is now placed horizontally on a table and stretched 11 cm. What force is required to stretch it by this amount? Answer in units of N.
December 9, 2015

physics
The acceleration of gravity is 10 m/s2. What is the acceleration of a 46 kg pail of cement that is pulled upward (not sideways) with a force of 478 N? Answer in units of m/s2.
December 7, 2015

physics
On planet X, an object weighs 18.1 N. On planet B where the magnitude of the free-fall acceleration is 1.28 g (where g = 9.8 m/s 2 is the gravitational acceleration on Earth), the object weighs 37.9 N. The acceleration of gravity is 9.8 m/s 2 . What is the mass of the object ...
December 7, 2015

AP Chemistry
The reaction of 5.1 grams of fluorine with excess chlorine produced 4.5 grams of ClF3. What percent yield of ClF3 was obtained? Answer in unites of %
December 2, 2015

math
The diagonal of a rectangular storage room is 4 yards long. If its length is 2 times its width, find the dimensions of the room.
November 29, 2015

physics
Your car is stuck in a mud hole. You are alone but you have a long strong rope. having studied physics you tie the rope tautly to a telephone pole and pull on it sideways at the midpoint as shown. Find the force exerted by the rope on the car when the anle is 3.2 and you are ...
November 23, 2015

physics
The distance between two telephone poles is 31 m. When a 1.54kg bird lands on the telephone wire midway between the poles, the wire sags 0.165 m. The acceleration of gravity is 9.8 m/s^2. How much tension in the wire does the bird produce? Ignore the weight of the wire.
November 23, 2015

Physics
The 1.1 kg physics book is connected by a string to a 250 g coffee cup. The book is given a push up the slope and released with a speed of 2.9 m/s . The coefficients of friction are μs =0.50 and μk =0.20. What Distance does it travel up the slope? I drew a free body ...
October 7, 2015

physics
A 57.5-kg runner has a speed of 5.80 m/s at one instant during a long-distance event. (a) What is the runner's kinetic energy at this instant? 967.15 J (b) If he doubles his speed to reach the finish line, by what factor does his kinetic energy change? im having trouble ...
October 5, 2015

English
What are the differences between mood and tone?
October 5, 2015

Social Stuides
What is one way that the United Nations shapes world affairs
September 28, 2015

Social Stuides
Write at least one way that the United States has influenced another nation-state and at least one way that another nation-state has influenced the United States.
September 26, 2015

physics
A knight sits on a castle wall during a siege.To while away the time, he notes that boulders catapulted from below land on the top of his wall with a vertical velocity of 9.9 m/s. If he is 35 m above the catapult, what is the initial velocity of the boulders? Theacceleration ...
September 25, 2015

physics
A ball is thrown straight up and reaches a maximum height of 7.16 m. What was its initial speed? The acceleration of gravity is 9.8 m/s Answer in units of m/s.
September 25, 2015

4th grade math word problem
tim is 27 years older than tom. the sum of their ages is 337. how old is ti,?
September 13, 2015

Biology
The answer is waters high specific heat. the specific heat is a measure of how well a substance resists increasing temperature. the higher the number, the better it is at resisting that heat. So on a hot day, the water wont just cook the fish
September 9, 2015

heith
Shirley has two containers of water for a camping trip. One container holds 2 times as much as the other. The total amount of water is 30 gallons. How much water is in each container?
August 28, 2015

science
A ball with a mass of 3.47 kg is rolling along at 17.4 m/s. If you apply a force of 52.2 N to it, how many seconds will it take to stop?
May 28, 2015

chemistry
How many grams of solid ammonium chloride should be added to 1.50 L of a 0.224 M ammonia solution to prepare a buffer with a pH of 8.720 ?
April 3, 2015

College Algebra
A rectangular garden next to a building is to be fenced on three sides. Fencing for the side parallel to the building costs $60 per foot, and material for the other two sides costs $20 per foot. If $1,500 is to be spent on fencing, what are the dimensions of the garden with ...
March 26, 2015

Algebra 2
solve 3 square root 2x +1 =3 2x +1 under the sqaure
March 11, 2015

Algebra 2
solve square root 5-2x + 5 =12 5-2x under the sqaure
March 11, 2015

Algebra 2
solve square root 2x-5 =7 the 2x -5 is under the sqaure
March 11, 2015

math
A store sells one model of bicycle for $250. a. Write an expression for the amount of money the store receives if it sells b bicycles. b. How much would the store make if it sells 5 bicycles.
February 24, 2015

Algebra 2
divide using long division. (6x^2+4x-16)/(2x-2)
February 10, 2015

Algebra 2
solve each equation. x^4-81=0
February 10, 2015

Algebra 2
find the real solutions of each equation by graphing. 15x^4=11x^3+14x^2
February 10, 2015

Algebra 2
find the real solutions of each equation by graphing. 2x^4=9x^2-4
February 10, 2015

Algebra 2
Solve each equation. x^4 -x=0 x^4-81=0
February 9, 2015

Algebra 2
find the real solutions of each equation by graphing. 2x^4=9x^2-4 15x^4=11x^3 + 14x^2
February 9, 2015

Physics
A projectile is launched at 5.4 m/s with an initial angle of 22 degrees from an initial height of 2.6 meters. Where will it land? How fast, and at what angle will it be going when it hits the ground?
February 8, 2015

Chemistry
Draw the Lewis structure for each of these molecules. 1. PH3 2. H2S 3. HCl 4. CCl4 5. SiH4
January 28, 2015

Chemistry
A quantity of ice at 0.0 °C was added to 33.6 g of water at 45.0 °C to give water at 0.0 °C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol, and the specific heat is 4.18 J/(g•°C).
January 26, 2015

physics
LNAJNDWAD
January 15, 2015

Algebra 2
thanks
January 14, 2015

Algebra 2
find the factored forms of each expression. -9x^2 - 100
January 14, 2015

Algebra 2
suppose y varies directly with x and y=1 when x= -3. what is the constant of variation? what is x when y=4?
December 16, 2014

Algebra 2
what are the x and y intercepts of 2x +4y =8?
December 16, 2014

Algebra 2
find the slope of each line. a. y= 2x-3 b. 3y=7x =1
December 16, 2014

Algebra 2
write the compound inequality 3.1 less then or equal to m less than or equal 4.7 as an absolute value inequality.
December 16, 2014

Algebra 2
solve ax -3x + 5 = a+b for x. state any restrictions on the variables.
December 16, 2014

Algebra 2
thanks
December 16, 2014

Algebra 2
write an equation to solve the problem. find three consecutive even numbers whose sum is 144
December 16, 2014

Algebra 2
yes that's the equation
December 10, 2014

Algebra 2
write each function in vertex form f(x) =-2x^2 =6x + 10
December 10, 2014

Algebra 2
what is the positive solution of the equation 1/2x^2 -3x =5? solve by using a table or by graphing. if necessary, round your answer to the nearest hundredth.
December 8, 2014

Algebra 2
what is the positive solution of the equation 3x^2 - 5x - 7 =0? solve by using a table or by graphing. if necessary, round your answer to the nearest hundredth.
December 8, 2014

Algebra 2
what is the positive solution of the equation x^2 - 3x = 1? solve by using a table or by graphing. if necessary, round your answer to the nearest hundredth.
December 8, 2014

Algebra 2
what is the positive solution of the equation 5x^2 + 2x -16 =0? solve by factoring.
December 8, 2014

Algebra 2
what is the positive solution of the equation x^2 = 2x + 35? solve by factoring.
December 8, 2014

Math
1/24
December 4, 2014

chemistry
calculate the molarity of a g NaCl in 250 ml solution.
November 25, 2014

Chemestry
50 protons
August 1, 2014

Math
If the largest two-digit number is added to 200, what is the sum?
July 7, 2014

algebra
I need some help with ln 's I am trying to solve : ln(x+3)- ln(x-5)= ln7 do I: ln (x+3)/(x-5)= ln 7 ?
April 11, 2014

physics
A passenger weighing 800 N is inside an elevator weighing 25000 N that rises 30 m in exactly 1 min. How much power is needed for the elevator's trip?
March 27, 2014

Math
hmmm
March 16, 2014

physics
How much time does it take a pulse of light to travel through 180\({\rm {\rm m}}\) of water?
January 20, 2014

Finite
An urn contains 5 white balls and 4 black balls. If 3 balls are randomly selected ( at once, without replacement ), what is the probability that at least 1 ball is black? Give answer as a decimal number with three correct decimal places.
November 14, 2013

math
arrays and an expanded algorithm 23 x17 how do I solve this
November 5, 2013

calculus and vectors
------------------------------------- \.56 degree ...........45 degree.../ \................................/ \............................../ \............................/ \........................../ \......................../ \______________________...
September 26, 2013

calculus and vectors
Reiny, I do not see how your calculation = 65.88, I get 25.2. Also, I do not understand your diagram. It looks like this ------------------------------------- \ 56 degree 45 degree / \ / \ / \ / \ / \ / \______________________/ | | | 35 newtons | | | |_____________________|
September 26, 2013

probability
A random sample of six integers in the interval [1,42] is to be drawn. The numbers are selected randomly, one after the other, and repeats are allowed. What is the probability the six numbers in the sample will all be different?
September 4, 2013

math
A very small population consists of 7 units, labeled a; b; c; d; e; f; g. How many di fferent samples of size 3 are there, for sampling without replacement, assuming that (a) samples are lists of units. (b) samples are sets of units.
September 3, 2013

Biology
What does the notation 4n = 28 tell you about how many types of chromosomes there are and how many of each type of chromosome are present in a cell? I am a little confused on how this is determined. Would it be 4 sets of chromosomes with 7 of each type of chromosome?
August 24, 2013

math
Shelly delivers the weekly local paper to neighborhoods in her town. House numbers are even on one side of the street and odd on the other. Shelly delivers an equal number of papers to both sides of the street. Although she always aims for the front doorstep, Shelly typically ...
July 21, 2013

math
Kalil flipped a coin sixty times. He got thirty-four heads. How does this result compare to the number of heads you would have expected based on theoretical probability?
July 18, 2013

math
Shelly delivers the weekly local paper to neighborhoods in her town. House numbers are even on one side of the street and odd on the other. Shelly delivers an equal number of papers to both sides of the street. Although she always aims for the front doorstep, Shelly typically ...
July 18, 2013

MacroEconomics
12
July 15, 2013

algebra 1
What is the solution set of the given equation? 4y - 6y + 9y = -2
July 13, 2013

algebra 1
Which of the following equations has the given solution set? Solution set: Ø
July 13, 2013

algebra 1
Which of the following would eliminate the variable on the left side of the given equation? 36 - 19w = -6w + 41
July 13, 2013

Physics
A tennis ball may leave the racket on a serve by a top player with a speed of 45.0 m/s. If the ball's mass is 0.063 kg, and it is in contact with the racket for 0.030 s, what is the average force (in newtons) on the ball?
July 12, 2013

Physics
A 17000 kg railroad car travels along on a level frictionless track with a constant speed of 23.0 m/s. A 5100 kg additional load is dropped onto the car. What then will be its speed in meters/second?
July 10, 2013

Math
Yes what I meant is that it decreased 1/4 of every its impact, so therefore the answer would be 60 mph after first impact.
May 6, 2013

Math
A rubber ball is thrown straight down from a height of 244 feet at speed of 80 feet per second. If the ball always rebounds with one-fourth of its impact speed, what will be the speed of the ball the third time it hits the ground? My Answer is: 1/4*80=60 1/4*60=45 1/4*45=33.75...
May 6, 2013

Math
I have 5 tickets for a raffle and I know that the probability of my winning the prize is 0.003. How many tickets were sold altogether?
April 23, 2013

Math
A 15-g sample of radioactive iodine decays in such a way that the mass remaining after t days is given by m(t) = 15e^(−0.051t), where m(t) is measured in grams. After how many days is there only 3 g remaining?
April 22, 2013

6th grade math
How to figure if 60 cookies were baked and 7/12 were given away, how many are left?
April 9, 2013

chemistry
When 1988 J of heat energy is added to 47.5 g of hexane, C6H14, the temperature increases by 18.5 °C. Calculate the molar heat capacity of C6H14.
April 7, 2013

Physics
A laser beam is being shot through two different materials that have been stuck together. if theta 1 = 65.5 and theta 2 = 49.8 what is the index of refraction? (I got 1.2 which is correct) but cant get part 2 PART 2~ If the index of refraction of n3 is 3.6, what is the final ...
April 4, 2013

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