# Posts by james

Total # Posts: 2,490

**Physics**

A construction worker tosses a hammer straight up to a co-worker who is working on a platform above him. The hammer leaves his hand at 7.26 m/sec, and travels 3.33 meters upward, at which point it is caught by the worker on the platform. (It is caught while still moving upward...

**Maths**

Round 5,000.083 to three significant figure.

**MATHS**

A chord 20cm long is 12cm from the center of a circle calculate, correct to one decimal place

**chemistry**

The reaction of hydrochloric acid and sodium hydroxide is exothermic HCl +NaOH --> NaCl + H2O In one experiment, a student placed 50.0 mL of 1.00 M HCl at 25.5 oC in a coffee cup calorimeter. To this was added 50.0 mL of 1.00 M NaOH solution, also at 25.5 oC. The mixture ...

**chemistry**

The reaction of hydrochloric acid and sodium hydroxide is exothermic HCl +NaOH --> NaCl + H2O In one experiment, a student placed 50.0 mL of 1.00 M HCl at 25.5 oC in a coffee cup calorimeter. To this was added 50.0 mL of 1.00 M NaOH solution, also at 25.5 oC. The mixture ...

**Economics(help!!!) **

A monopolist is deciding how to allocate output between two markets that separated geographically. Demands for the two markets are P1=15-Q1 and P2=25-2Q2.The monopolist's TC is C=5+3(Q1+Q2).What are PRICE,OUTPUT,PROPISTS, MR if a)the monopolist can price discrinate? b)the ...

**economics**

Define utility using mathmatical expression.

**Micoeconomics**

Explain the profit maximation conditiond of multi plant monoplist?

**maths for business Help!!!**

Jacson purchased a house for Birr 50,000. He made an amount of down payment and pay monthly Birr 600 to retire the mortage for 20 years at annual interest rate of 24% compounded monthly. Find mortage down payment interest charged percentage of down payment to selling price.

**Math**

A real estate salesperson bought promotional calendars and date books to give to her customers at the end of the year. The calendars cost ?$0.750.75 ?each, and the date books cost ?$0.500.50 each. She ordered a total of 500500 promotional items and spent ?$275275. How many of ...

**Math**

I want to know how to solve this problem7/8×16/21

**Mathematics **

A cube is divided into six identical square pyramids, each with a perpendicular height (s) that is half the length of the base edge (2s). Show that the volume of each pyramid is one third the volume of a square prism with the same base edge and perpendicular height.

**Statistics**

if 5 dice are thrown find the probability that at least 3 of them will turn up 6

**Science**

Acceleration due to gravity on planet mercury 3.7m/s.what would the mass of a person weighing 637 n on mercury

**Stat**

A squad is made up of 10 privates and 5 privates ?rst class. (a) In how many ways can a detail of 4 privates and 2 privates ?rst class be formed?

**Statistics**

the probability that A hits a target is 1/4 and the probability that B hits the target id 1/3. if each fires once and the target is hit only once, what is the probability that A hit the target?

**Stat**

4 different letters are dropped on the floor and then inserted into four differently addressed envelopes. Find the probability that exactly 2 letters are inserted into the proper envelope.

**word problem**

The admission for a school play is $3.50 for children and $9.00 for adults. on a certain day, 312 people attended the play, and the total money collected from sales was $1884. How many children and how many adults were admitted?

**word problem**

thank you

**word problem**

I have no clue on how to set up this equation please help. A car rental company offers two plans for renting a car. Plan A:21 dollars per day and 18 cents per mile Plan B:25.44 dollars per day and 15 cents per mile If you plan to rent the car for one day. and "m" ...

**SCIENCE CHEMISTRY**

Use the atomic weight of carbon and chlorine to determine the theoretical value of the molecular weight of CH3OH Or methanol.( atomic weights (c=12, cl=35.5).

**English**

i thought same thing first ty

**English**

is point of view a literary element or literary technique?

**English help**

Hey there! Do you still in need for the expository composition? I had to write something similar and all the time I postponed doing it due to the various reasons. The friend of mine told me about Marvelous essay service. You may ask for the help there.

**History**

I completely agree with Reed. I guess there is more information to extend your essay and to prove your points. Have you tried to search for more information? You may also get the professional help by using the online writing service. I use Marvelous essays site and I think ...

**maths**

Three numbers are in the ratio 1:3:4. If the difference between the two smaller ones is 10, what are the numbers?

**Physics**

The number of revolution made by a fly wheel change from 300rpm to1500rpm in 10s.Calculate angular acceleration assuming it to be uniform .Also calculate the number of revolution made during the time?

**Social Studies**

A A C A D C B A

**math**

A data set is shown below. x y 1 6.00 2 5.04 3 4.23 4 3.56 5 2.99 6 2.51 7 2.11 Using an exponential best-fit model, what is the residual when x = 1. Round your answer to the nearest hundredth. This is the problem i dont understand line of best fit i dont get at all

**math**

wrong problem please nobody respond

**math**

A set of data is shown below. x: –1 0 1 2 3 4 5 y: 3 7 5 6 7 8 Using a line of best fit, what is the value of the residual for the data at x = 2? Round your answer to the nearest thousandth. I dont remember line of best fit if you could please explain this problem.

**Math**

sorry i meant 111 calories

**Math**

81 calories

**US History**

Thanks Ms.Sue for your opinion! Even tho i had to use my own thoughts.

**US History**

Roosevelt asserted that the expanded reach of the federal government to solve economic problems was not an essential change to the Constitution. Do you agree? Why or why not?

**English**

We are currently learning about types of communications in my english class, we were each given a question and I need help with mine. 9. You are working in a face-to-face group and one of your group members offers a suggestion which the group decides not to use. The group ...

**math**

A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from the river, choose his ...

**Math**

1) The manager of a warehouse would like to know how many errors are made when a product’s serial number is read by a bar-code reader. There are 24 errors after 1000 scans. Is it reasonable for the manager to expect less than 5% errors in 1000 scans? 2) Just to be sure, ...

**Math**

A manufacturer of flea collars for animals that weigh less than 5 kilograms injects the collars with 15 milligrams of a biocide that only acts on fleas. The manufacturer will release a collar that has no less than 14 milligrams and no more than 16 milligrams of insecticide. ...

**science **

. A runner jumps over a hurdle. Neglecting friction, the potential energy of the runner at the highest point compared to his kinetic energy at the lowest point is

**Geometry**

"Find the perimeter of the figure, where AC=26, AD=BF, and D is the midpoint of AC. Round your answer to the nearest tenth."

**algebra**

determine the numerical measure of each angle of parallelogram x+40 3x-20 x= m/_M= m/_I= m/_L= m/_K=

**Physics**

An anti-aircraft gun fires at an elevation of 60 degree at an enemy aircraft at 10000m above the ground. At what speed must the cannon be shot to hit the plane at that height? (g=9.8)

**Math help! Hurry Please~**

for 7th graders unit 4 lesson 4 it is a little different. 1D 2C 3D 4B 5B 6A For 7 all you have to do is plug in the values for x and then solve for y For 8 multiply 159 by 3

**Social Studies**

C D A A B D

**SS**

Thanks guwop

**art**

42.68

**Math Plz help ASAP**

1.C 2. B 3. C 4. b 5. A 100%

**Chem**

How do peroxides differ from other group of oxide?

**basic calculus**

A page is to contain 54 square centimeters of printed material. If the margins are 1 cm at the top and bottom and 0.5 cm at the sides, find the most economical width of the page (in cm).

**Physics**

Explain in detail how you would find the density of an unknown high-density object if you had only the objects listed below.If you show calculations, make sure you define your variables.Assume all containers are large enough to hold the object.... You have: 1. - A spring scale...

**Physics**

V=m/d I understand how to solve for volume but there doesn't seem to be a definitive mass for air and helium in this answer, can I get some more help please? Or should I just do two equations (1.25=800/v and .18=800/v) but then what do I do? Im a little confused

**Physics**

You want to carry an 800kg object into the air using a helium balloon. What size of a helium balloon (I'm looking for volume) would be required to accomplish such a task? Assume the density of air is 1.25 kg/m3 and the density of helium is 0.18 kg/m3.

**Math**

The formula for the volume of a cube is V equals S3 where X represents the side length of the cube find the volume of a cube with side length of 0.5 millimeters

**physics**

Calculate the rotational inertia of a wheel that has a kinetic energy of 24,400 J when rotating at 677 rev/min. I know that I = mr^2 and that T = Ia; also I calculated 677rpm to be 70.9 radians/sec. But I don't understand how to integrate KE into this.

**MATH**

it is 7cm and 4 miles

**Math**

fred is more than 3 years more than twice the age of jane. the sum of their ages is 48. how old is each?

**Physics**

A car mass of 900kg travelling at 15m/s crashes into a wall and comes to rest in 0.3s. Calculate the average decelaration. Calculate the average force exerted

**social studies**

The answer are D, C, D, and A

**Social Studies**

Wrong

**science **

Calculate the work done in each of the following situations. (a) A horse pulls a wagon with a force of 1200 N and moves it 15 m. (b) A cable lifts an elevator 16 m by using a cable with a tension force of 2500 N. -How much work is required to lift a 35-kg object from the ...

**Social Studies**

Thanks tessa

**Math- Inequalities**

Hey, how would I start off solving (x-5)(x+2)<0???

**U.S history**

what are the powers of Maryland General Assembly and Baltimore city council.

**riddle**

love

**Computing **

Pseudocode to describe how to get the information and output the area of a triangle. How do integrated development environment(IDE) help to create maintainable code? Thank you.

**Computing **

Pseudocode using a repeat-until loop to output the first five square numbers. Thank you.

**Computing **

Pseudocode to describe how to get the information and output of a triangle. Thank you.

**C**

Pseudocode: Write a pseudocode to describe how to calculate the average of 10 numbers. Thank you.

**Computing **

How do features of ide help to create machinable code?

**Computing **

What is the importance of file standards when including external files on a website page. Thank you.

**Physics**

An empty bottle weighs 20g and 60g when filled completely with water.What will it weigh when filled completely with mercury? 20÷60=0.3

**pre-algebra**

6 blank 3 divided by 9 blank 4 + 4=12 what are the blanks

**4th Grade Math**

Ben is helping plant tulips. He plants bulbs in two rows and has one bulb left over. So he tries again. He plants bulbs in three rows and has one bulb left over. So he tries again. He plants bulbs in four rows and has one bulb left over. So he tries again. He plants bulbs in ...

**Social studies**

Hey is right

**MATH 2**

It is found that the number of raisins in a box of a popular cereal is normally distributed, with a mean of 133 raisins per box and a standard deviation of 10 raisins. My cereal box has 147 raisins. What is the z-score for this box of cereal?

**science**

What was the answer?

**Math**

what times 35 to make 50

**Business Finance**

1. What is the actual present value of the lien ($8,000, 30 yrs @ 12% interest – do not calculate simple interest!)? 2. How much will the conservator have after the sale of the property closes?

**math**

A sphere of radius 7 m is circumscribed about a regular triangular prism. If the base edge of the prism is 1 m, find the volume of the prism (in m3). Round off your answer to four decimal places.

**Math**

Find the volume of the solid of revolution obtained by revolving the plane region R bounded by y= x^5, the y-axis, and the line y=3 about the x-axis I've gotten 15/7(3^(2/5))pi, but it's not right. Please help

**Calculus**

Find the volume of the solid of revolution obtained by revolving the plane region R bounded by y= x^5, the y-axis, and the line y=3 about the x-axis So far: y=x^5 is equal to x=5th root y. I've plugged that in to pi(r^2)h, and got V = pi ?[0,3] y^(2/5) dy. so far I've ...

**CHECKA Math!**

32.4%

**Math**

Please help someone

**Math**

I'm rounding to nearest hundred

**Math**

Four ways to round to 400

**Math**

what two numbers rounds to 600

**Math**

I am rounding to nearest 100

**Math**

What two numbers round to 700

**Calculus - Fundamental Thm of Calc**

Suppose F(t) is an antiderivative of t^{3}. Then F'(t)= t^3. According to the Second Fundamental Theorem of Calculus, x ? (t^3)dt = ??? 1 Answer using the function F

**math**

1/2 < -7/10 is this a true statement

**Physics**

An object is projected from a satellite orbiting 200 km above the surface of the earth. The object has a speed relative to the Earth of 2.85×104 m/s. What is its speed when it is very far from the earth?

**Psychics**

Super man lived on Krypton where acceleration due to gravity is 23.6 m/s^2. If a woman falls from a building that is 88.3 meters tall, how long does he have to save her before she hits the ground?

**Calc**

Find the values of C guaranteed by the mean value theorem for integrals. f(x)=x^3 [0,3]

**Math**

Rectangle perimeter and area length =2ft width =14in

**Physics**

A force of 123 N acts on a 10.0kg object for 45.6 meters. If the objects starts at rest, and the surface is flat and frictionless, how fast is the object moving after the force is removed. I got acceleration to be 12.3, but I am not sure how to move on with the problem.

**Calculus**

True/false: x^2-3 is concave up on the interval (-1,1) The second derivative of x^2-3 is just 2. How do I determine concavity of a function when I can't set it equal to 0? And then how do I answer this question when it's asking for a specific interval?

**Spanish**

D A A C B

**Chemistry**

In a similar experiment, a sample of tin metal was dissolved in nitric acid to produce 23.00 mL of solution containing Sn2+. Titration analysis resulted in the calculation that the concentration of Sn2+ in this solution was 0.65 mol/L. b. What mass of tin was used to make the ...

**Calculus - Special sum formulas**

Find a formula for Sum_{j=1}^n (j+3) (j-4) So far, I have foiled to j^2-j-12. Thus,Sum_{j=1}^n(j^2) - Sum_{j=1}^n(j) - Sum_{j=1}^n(12). From Special Sum formulas, I have gotten to n(n+1)(2n+1)/6 - n(n+1)/2 - 12n What do I do from here?