# Posts by jhon

Total # Posts: 122

physical science
A sample of tin (Cp = 0.227 J/g•°C) is placed in a freezer. Its temperature decreases from 15.0°C to ?10.0°C as it releases 543 J of energy. What is the mass of the sample? Round your answer to three significant figures.

econ
Which best describes interest?

LA HELP/CHECK!
yes these are all correct

English
If a writer wanted to put emphasis on the person doing an action, which of these statements would be the best choice? A) active voice B) passive voice C) subjunctive mood D) interrogative mood

math
In five games, you score 16, 12, 15, 13, and 17 points. How many points must you score in the sixth game to have an average of at least 15 points?

science,physics
a 5kg bomb exploded into two fragments .If one fragment with 3 kg moves in a direction with 5m/s then what is the velocity of the second fragment of mass 2kg

Science
An athlete runs on a circular track 7m.calculate the distance and displacement covered by him after 3 rotations?

MATH
A number has three distinct digits. The sum of the digits equals the product of the digits. How many three-digit numbers satisfy this condition?

geometry
Given m = 10 and n = 9, the ratio of n to m is 10/9. True False

Language Arts
thanks i play mincraft

economics managerial
total revenue equation TR = 5000Q – 5Q2 and total cost equation C = 500 + 3Q2 Calculate this firm’s profit maximizing price, quantity, total revenue, total cost, and total

history
happyness

history
what about Mohawk interactions with the europeans

math
yes its true

computer Science
1. Create a program which will allow the user enter ten numbers. The program is to count how many numbers were above 50. Hint: You will need to incorporate a Selection (If…then) statement.

math
Actually it is 2.07 because 17.97+25.49 is 43.46 and 43.46+0.33 is 43.79 then subtract 50.00 and 43.79 then you divide 6.21 from 3 and you will get 2.07

math help
Jordan earns \$11.35 per hour and works 40 hours per week. He then earns a 20% pay raise. How much money will Jordan now make each week? A \$363.20 B \$454.00 C \$463.08 D \$544.80 how is this d

math help fast
During an oil change, each car needs 4 1/2 quarts of oil. Each 5-quart container of oil costs \$14.99. Before tax, how much will the oil cost Mr. Richards for both cars in a year? A \$44.97 B \$80.94 C \$89.94 D \$107.93 why is this c

math help
Mr. Richards has two cars that he changes the oil in every four months. During an oil change, each car needs 4 1/2 quarts of oil. Each 5-quart container of oil costs \$14.99. Before tax, how much will the oil cost Mr. Richards for both cars in a year? A \$44.97 B \$80.94 C \$89.94...

math help
Mr. Richards has two cars that he changes the oil in every four months. During an oil change, each car needs 4 1/2 quarts of oil. Each 5-quart container of oil costs \$14.99. Before tax, how much will the oil cost Mr. Richards for both cars in a year? A \$44.97 B \$80.94 C \$89.94...

math help
Mr. Donahue needs 4 1/2 pounds of flour to make 5 loaves of bread. He bought a 50-pound bag of flour that costs \$64.99. About how much will Mr. Donahue spend on flour for a loaf of bread? A \$1.17 B \$5.85 C \$6.50 D \$58.49 how is this answer A

math help
4 1/2

math help
i is 4 1 /2 half pounds by the way

math help
Mr. Donahue needs eq177745_s1 pounds of flour to make 5 loaves of bread. He bought a 50-pound bag of flour that costs \$64.99. About how much will Mr. Donahue spend on flour for a loaf of bread? A \$1.17 B \$5.85 C \$6.50 D \$58.49 how is this on A please explain

math help
Mrs. Williams is going to purchase a plastic cover for her outdoor fish pond. The area of the fish pond is 25 m2. However, she must purchase a cover that is 12% more than the pond area in order to cover the entire edges of the pond. The plastic cover costs \$4.75 per square ...

math help
Mrs. Williams is going to purchase a plastic cover for her outdoor fish pond. The area of the fish pond is 25 m2. However, she must purchase a cover that is 12% more than the pond area in order to cover the entire edges of the pond. The plastic cover costs \$4.75 per square ...

math help
Hayley wants to purchase tile for the floor in a rectangular room that measures 15 feet by 14 feet. The tile costs \$4.25 per square foot. Sales tax is 6.5%. What will be the total cost to cover Hayley’s floor with tile?

math
A new automobile costs \$23,782, but after one year it is worth \$17,668. What is the approximate percent of decrease in the value of the automobile?

damon i need your help again
Julie deposited \$300 into a simple interest savings account that earns 1.34%. If no money is added or withdrawn from the account, about how long will it ...

Jill’s room is 12.5 feet long and 11.5 feet wide. She made a scale drawing of the room with a scale of 0.5 inch = 2 feet. What is the perimeter of Jill’s room in the drawing? A. 12 inches B. 24 inches C. 48 inches D. 96 inches

i really need help but dont know how to do it
thank you damon can you help me with more

i really need help but dont know how to do it
Taylor made a scale drawing of his room using a scale of 0.25 inch = 1 foot. On the drawing, the length of his room is 3.25 inches and the width is2.75 inches. What is the area of Taylor’s actual room? A. 36 square feet B. 48 square feet C. 143square feet D. 148 square feet

Math
An electric dentist chair lifts ruth,110,0.3 meters in 10 seconds what is the power developed by this chair?

ALGEBRA
A rectangular garden is 30 ft wide. If its area is 2700 ft{}^2, what is the length of the garden?

trigonometry
find the radius of a circle in which a 59 foot chord subtends an angle of 12 degree at the center

chemistry
Hess¡¯ law says that when we add reactions together we can also add the enthalpies. Given the following set of reactions, use Hess¡¯ Law to calculate the enthalpy of the reaction given below. N2H4 + H2 ¡æ 2 NH3 ¥ÄH¡Æ = ? ...

Social Studies
he is right

chemistry
The following experimental data were obtained for the reaction; 2 NO + 2 H2 ¡æ N2+ 2 H2O Rate/10-5M/s [NO]/10-2M [H2]/10-2M 0.50 0.50 0.20 2.00 1.00 0.20 0.25 0.25 0.40 Write a rate law in agreement with the data. Rate = What is the value and units of the rate ...

physics
i think k.E= 1/2 mv2 AM i right/?

physics

Math
So -12 negative twelve plus 40 forty equals 28 twenty eight

Math
Well it says that the opposite of his age equals 40. The opposite of a number is its negative. That is how we get negative 12. When you add 40 to negative 12 you get 28 just like the problem says.

Math
-12+40=28 Get it?

Math
He is 12 years old

english
The first is (b)

English
Well I did read it. From these stories you don't get the exact answer. I just wanted a second opinion. : D

English
Which adjective best describes the community's attitude toward Mari Djata's inability to walk in Sundiata? A. fearful B. indifferent C. sympathetic D. mocking B?

english
The first one is (b) im not sure about the second

physics
a 20 kg traveler's bag is being pulled along the floor with a force of 50 NF. the force is applied on the handle forming an angle of 30 degree with the horizontal. neglecting friction,what is the acceleration og the bag? How much force is exerted by the floor on the bag?

physics
a 20 kg traveler's bag is being pulled along the floor with a force of 50 NF. the force is applied on the handle forming an angle of 30 degree with the horizontal. neglecting friction,what is the acceleration og the bag? How much force is exerted by the floor on the bag?

chem
Fe + O2--->Fe2O3 How many grams of iron are required to convert 80 mL of oxygen at STP?

computer literacy
file explorer

chem
A 0.069 gram sample of a metal reacted with HCl and produced 45.31 mL of H 2 gas at 25¡ÆC and 1 atm pressure. The metal is known to react with HCl according to the following reaction, 2 M + 6 HCl > 2 MCl 3 + 3 H 2 What is the molar mass of the metal? Which metal...

chemistry lab
If a portion of your aspirin sample had broken down, how would that effect the total amount of base used? What would the effect be on the percentage of aspirin in your sample?

physics
If you wanted to make a barometer that had a column of liquid about 6 feet tall, what would the density of the liquid have to be? 1 meter = 3.28 ft 1 inch = 2.54 cm Density Hg = 13.6 g/mL 1atm = 760 torr

chemistry
If you wanted to make a barometer that had a column of liquid about 6 feet tall, what would the density of the liquid have to be? 1 meter = 3.28 ft 1 inch = 2.54 cm Density Hg = 13.6 g/mL 1atm = 760 torr

Chemistry
How much energy in kilojoules is released when 25.0 g of ethanol (C2H5OH) vapor at 93.0 C is cooled to -10 C? Ethanol has mp = -114.1 oC, bp = 78.3 oC, ΔHvap = 38.56 kJ/mol, and ΔHfus = 4.93 kJ/mol. The molar heat capacity is 112.3 J/(K.mol) for the liquid and 65.6 J...

Young Harris College
How much energy is needed to heat 8.50 g of ice from -30.0 C to 70.0 C? The heat of fusion of water is 6.01 kJ/mol, and the molar heat capacity is 36.6 J/(mol.K) for ice and 75.3 J/(mol.K) for liquid water. I got 19.24kJ but it isn't correct!!

stop cheating

Math
1000010101

statistics
0.76

Probability
1??? 2 2/72 3a 12/72 3b 1/4 3c 0 3d 42/72 4a 3 4b 61/9 5 3/2 6 173/47

logic
a team of Andres Bruno carlos Daniel and Esteban participated in a tennis doubles tournament so two of one team play against other two It is known that Andres participated in a game Bruno in 2 carlos in 2 Daniel in 3 and Esteban in 4 then the amount of matches of the team were...

logic
CLaudia has 4 task to do go to the market, study, clean , sport it is known - go to the market if study - study if she does not clean - if she does not clean then she goes to the market a 15% b 12% c 10% d 24%

logic
a survey of three marks of soda has -of 100 people 83 drinks at least 1 of 3 marks -54 just drink 1 -19 drinks 2 of 3 between the people the % that drink the 3 are a 15% b 12% c 10% d 24%

logic
100 days after a sunday will be a day a Sunday b Tuesday c thursday d monday

logic
In a soccer tournament between four teams A,B,C,D wich was free for all the scores were A 4 points B 4 points C 3 points D 1 point In this tournament the winner gets 2 points, the draw 1 point the looser 0. It is known that each team has a goal so. 1 The result bteween A and B...

logic
in a bike competition with 21 laps was observed that 13% quit before 5 laps, 17% quit later than 5 laps but less than 15, and the others 210 finished the competition the number of bikers that quit before the 5 lap were: a) 27 b) 39 c) 43 d) 56

logic
Camilo, Diego, Esteban transport on their bikes apples, the way was splitted in two parts to handle the weight. In the first step for each 6 apples that carries Camilo diego carries 5 Esteban 4, in the second step for each 2 apples tath carries Camilo, Diego carries the same ...

logic
the rectangle represented the AB side is 4cm the side BC is 6 cm i want to build a triangle taking the AB segment and the third vertice inside the triangle so his area becomes higher than 8 cm*cm. the area in cm*cm of the region of the rectangle in which can be chosen the ...

logic
the rectangle represented the AB side is 4cm the side BC is 6 cm i want to build a triangle taking the AB segment and the third vertice inside the triangle so his area becomes higher than 8 cm*cm. the area in cm*cm of the region of the rectangle in which can be chosen the ...

classical mechanics
A Venturi flow meter is used to measure the the flow velocity of a water main. The water main has a diameter of 40.0 cm, and the constriction has a diameter of 20.0 cm. The two vertical pipes are open at the top, and the difference in water level between them is 2.0 m. Find ...

Logic
Claudia has four home works to do, go to the market, study for the exam, clean the room, and practice sports, she knows that: -she goes to the market if she studies for the exam. -she studies for his exam if she does not clean his room -if she does not practice his sport then ...

math
i want to add 34+85% i tryed it and i got 62.9

math
its in percent (85%) i don't think it should be in decimal when i tryed it i got the answer as 28.9 tonnes

math
Many people are trying to reduce their carbon footprint. Amrita’s carbon footprint this year was 85% of last year’s footprint. If her carbon footprint this year is 34 tonnes,what was her carbon footprint last year? PLZ NEED HELP

math
Please show all of your work in the space below. Please present and organized and complete solution. A garden will be made up of a parallelogram, a rectangle and a triangle. The garden must have an area of 500m square. Draw two possible gardens. Determine the dimensions of ...

math
2 Lucy spread a tablecloth in the grass beside the millpond.

Physic
HW3___1B ?

chemistry
a) option d

1. a 2.c 3.a

math
cotx+tan2x=cotxsec2x prove

Math
i don't under stand the word math problem

physics
a pitching machine throws a baseball at a batter with an initial velocity of 22.0 m/s at an angle of 30 degrees to the horizontal. the ball is 1.60 m above the ground when it is pitched. a) if the batter hots the ball at the same height as it was launched how long is the ball ...

physics
A motorboat travels due north at a steady speed of 3.0 m/s through calm water in which there is no current. The boat then enters an area of water in which a steady current flows at 2.0 m/s in a southwest direction, as shown in the next picture. Both the engine power and the ...

calculus(related rates)
Water is leaking out of an inverted conical tank at a rate of 12200 cubic centimeters per minute at the same time that water is being pumped into the tank at a constant rate. The tank has height 15 meters and the diameter at the top is 6.5 meters. If the water level is rising ...

math
a drawing of a deck has a scale of 1 inch to 5 feet. the actual deck is 18 feet long.how long is the deck in the scale drawing?

calculus
the dimensions of a closed rectangular box are measured as 30 in, 40 in.. and 60 in.. with a maximum error of 0.2 in. in each measurement. use differentials to estimate the maximum error in calculating the volume of the box

calculus
find the approximate change in z when the point (x,y) changes from (1,1)to (1.01, 0.90) f(x,y) = xe^(-y) + ye^(-x)

Chemistry
If a 2.6 g of weak diprotic acid were dissolved in 100 mL of water and a 10 mL aliquot of this solution required 21.6 mL of 0.1 M NaOH to reach the first endpoint, what are the equivalent and formula weights of H2A? I think I first need to find the moles of NaOH. Then, by ...

English
Is it self plagerism if I take the same argument or main idea from a paper that I wrote last semester and use that same principle/argument/main idea/thesis in another paper for the next semester if it's is completely rewritten with different words and stuff but is trying ...

Trigonometry
this can't be sovled there are two variables and one equation

Trigonometry
this can't be solved there are two variables.

garyson
A person rides up a lift to a mountaintop, but the persons ears fail to pop –that is, the pressure of the inner ear does not equalize with the outside atmosphere. The radius of each ear drum is 0.40×10ˆ-2m. The pressure of the atmosphere drops from 1.010×...

Computer Science (MATLAB)
Given an arbitrary one dimensional vector v imputed by the user for example v='Helllllloooooo' or v='Helo' I was able to append empty characters onto any one dimensional vector that the user can enter so that way the total length of the vector is a multiple of ...

Computer Science (MATLAB)
I had a test in my computer science course in which I was asked if any while loop can be replaced with a for loop. I put true. I guess the answer was false. My professor said that if you had a while loop in which you asked the user to input a certain value that had to be ...

Computer Science (MATLAB)
I had a test in my computer science course in which I was asked if any while loop can be replaced with a for loop. I put true. I guess the answer was false. My professor said that if you had a while loop in which you asked the user to input a certain value that had to be ...

Computer Science (MATLAB)
Given a vector of values of zeros and ones such as [1 0 1 0 0 0 1 0] I'm asked to, given a probability provided by the user, use that probability to change the values in the vector using that probability. For example given the vector [0 1 0 0 0 1 0 0 0 1] and probability ....

English
Hi, I'm writing a paper for English and my professor crossed off the authors name in one of quotes for the citation of my rough draft as if it was suppose to be there. Something like xxxxxxxxxxxxxxxxxxxxxx (john 59) and she crossed off john as if I wasn't suppose to ...

chemistry
3.00

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