# Posts by Jack

Total # Posts: 1,834

Math
A boy is trying to find the height of a tree. When he stands 95.5 metres away from the tree (the distance D in Figure 2) the angle shown as è in Figure 2 is 31.5°. The boy’s eyes are 1.15 m from the ground (h in Figure 2). What is the height of the tree? You ...

Calculus
Use the trapezoidal rule with n = 5 to approximate. Keep at least 2 decimal places accuracy. Integrate: (cos(x))/(x) from x=1 to 5

Math
A florist used 12 flowers to make a bouquet, including 4 daisies. What is the probability that a randomly selected flower will be a daisy?

Software Engineering
Consider the following program (written in pseudo-code) begin x:= 0; y:= 1; z:= 1; while y <= n do x:= x+1; z:= z+2; y:= y+z; od sqrt := x; end Prove the partial correctness of the program with respect to the following predicates: Pre: {n>=0} Post: {sqrt2 <= n and n &...

Launguage Arts
It's depressing how you guys are bulling like Alyson said a little boy/girl. It just shows how the internet is now.

World History
Who was firends with Joseph Stalin?

World History
what was Joseph Stalin favorite music, and movies?

Geometry
2513.27 cm^2

Geometry
John bought a conical hat on a recent trip to central Vietnam. The basic frame of the hat is 16 hoops of bamboo that gradually diminish in size. The hat is covered in palm leaves. If the hat has a diameter of 50 centimeters and a slant height of 32 centimeters, what is the ...

math
the first, second, and third terms in the geometric progression are k,k-6, 2k-28 respectively. given that all terms of the geometric progression are positive, calculate the value of constant k.

Math
Wow Taehyung those are wrong i got 7/16 so i failed... thanks i will post the real awnsers which are D D C A A A B D D A C D A A D B I hope this will help dont listen to everyone else these are good awners %100

algerbra
a rectangle with width 2x+5 inches has an area of 2x^4+11x^3-5x^2-98x-120 square inches. Write a polynomial that represents its lenght

Math
For this problem (2)^0 (-2)^0 would I add the exponents? I f so what do I do with 2 and -2?

Calculus
Function is y=x2 . Take three points, x=2, x=3, x=4. Approximate this function at these three points for a deviation Δx =0.1. Which of the three points does the approximation works best? Which point does it works worst?

English

Math
It is 393

College Physics
A student of mass M = 82 kg takes a ride in a frictionless loop-the-loop at an amusement park. The radius of the loop-the-loop is R = 15 m. The force due to the seat on the student at the top of the loop-the-loop is FN = 696 N and is vertically down. What is the apparent ...

physics
125

Physics
A jet plane is flying at a constant altitude. At time t1=0 it has components of velocity Vx=90m/s, Vy=110m/s.At time t2=30.0s the components are Vx=-170m/s, Vy=40m/s.a).Sketch velocity vectors at t1 and t2.How do these two vectors differ?. For this time interval calculate b). ...

Math

calculus
just wanted solutions and maybe working out as my previous year exams papers don't come with solutions. So I cant compare to see if I got it correct or not.

calculus
a) Let f(z) = z^2 and γ(t) = 1 + it^3, t ∈ [0,1]. i) Write out the contour integral ∫γ f(z)dz as an integral with respect to t. You do not need to evaluate this integral. ii) Evaluate the integral ∫0,1+i z^2dz iii) What is the relationship between ...

calculus
Thank you. Just wondering why 3T can be 3 pi, 5 pi, pi. Also just need c and d.

calculus
a) Obtain all solutions of the equation z^3 +1 = 0 b) Let z = x + iy. Obtain the real and imaginary parts of the function f(z) = 1/1+z c) Let f(x + iy) = x^2 - y^2 + iv( x,y). Determine a function v such that f is differentiable in the whole complex plane. Express f as a ...

Physics
A string under a tension of 43.0 N is used to whirl a rock in a horizontal circle of radius 2.25 m at a speed of 20.0 m/s on a frictionless surface as shown in the figure below. As the string is pulled in, the speed of the rock increases. When the string on the table is 1.00 m...

Quick Citation Question
I am citing books in MLA format and I am wondering about the publisher. If the publisher is: Smith and John Publication, Inc. Do I include the "inc." part with the period?

Algebra
A balloon is secured to rope that is staked to the ground. A breeze blows the balloon so that the rope is taut while the balloon is directly above a flag pole that is 30 feet from where the rope is staked down. Find the altitude of the balloon if the rope is 100 feet long. ...

geography,life science, business and maths lit
Can i study sport science or land survey with this subjects?

Math
8*6=48\3=16

Physics
You are in the supermarket, pushing a cart with a force of 92 Newtons in the horizontal direction. There is a constant force of kinetic friction operating on the cart of 16.8 Newtons. Calculate the net work done on the cart, if the cart is displaced 5.6 metres in a straight line.

Science
You drop a ball, mass 117.1 grams from a height of 68.9 cm. It bounces back to a height of 48.1 from the floor. What is the change in gravitational potential energy from the moment it is dropped, to the moment it reaches the maximum height from the bounce?

Science
1.A 2.B 3.C 4.A You will get 100%

Science

math
Yasmin lives 400m from Anton.Kevin lives 0.45km from Anton.Jared lives 40 000mm from Anton.who lives closest to Anton?how do you know?make sure to show your work?

Precalc
Taxes on a house assessed at \$64,000 are \$1500 a year. If the assessment is raised to 85,000 and the tax rate did not change, how much would the taxes be( round to two decimal places)

Maths
A glass is designed in the shape of a cylinder. it has a radius 5cm, and holds 1 litreof liquid, what's the height of the glass

Calculus(PLZ HELP)
That website isn't helpful since the problem is a box cross sectional problem. But thank you for trying to help

Calculus(PLZ HELP)
A serving bowl has an inside diameter of 12 inches and a depth of 4 inches. The bowl is fashioned from part of a sphere. Find the capacity (volume) of the bowl.

Sidney flew in an airplane five times during her vacation.The flights averaged 2 hours 8 minutes long.The lengths of her first four flights were 2 hours 10 minutes,3 hours 20 mins,1 hours 15 minutesand 2hours 40 minutes.What was the length of her last flight

Science
What is the centripetal acceleration a satellite is orbiting the Earth at an altitude of 300.22 km?

Physics
dont be a dick bob

History
d for dick

physics
Imagine a parallel universe in which the electric force has the same properties as in our universe but there is no gravity. In this parallel universe, the sun carries charge Q, the earth carries charge −Q, and the electric attraction between them keeps the earth in orbit...

physics
An electron is projected with an initial speed of (1.90x10^6 m/s) into the uniform field between two parallel plates. Assume that the field between the plates is uniform and directed vertically downward, and that the field outside the plates is zero. The electron enters the ...

Math
Actually, rounding to the nearest whole number is incorrect. For example, 24 4/7 rounds up to 25, not the best number to divide by 4 to get your estimate. What you need to do is to find the nearest number (up or down) that is compatible with 4. So in this case, 24 4/7 would ...

Maths
The scale of a map is 1:500. Find the length of a road in real life if it is 6cm long on the map

Language arts
based on the text preview as well as research about the background of the novel and the author's life a reader can predict that the novel will most likely be about Deez nuts HA GOT EM

Social studies
Hey ms. sue . I went to the link that you put in here but I didn't see what I was looking for? could you pls help me>

Math
I need help please. Assume that one dollor is equal to 1.14 euros. If 500 g of an item is selling for 25 euros, what is its price in dollars per kg?

Algebra
write equation of given translation of y=|x| 1 unit down 5 units right 10 units left 4 units up 6 units left

Math -Algebra
write equation of given translation of y=|x| 1 unit down 5 units 10 units left 4 units up 6 units left

MATHS HELP URGENT(TIME AND WORK)
A can do a piece of work in 12 days whereas B can destroy the work in 3 days. A does the work for 10 days and then B destroys the work up to 2 days. In how many days will the work be finished?

math
You need 4 more ounces

Algebra 2 (Math)
Divide 3x^3 + 3x^2 + 2x – 2 by x + 3 using long division. Check my answer please. 3x^2 – 6x + 20 3x^2 + 12x – 16 3x^2 + 12x – 16, R 58 3x^2 – 6x + 20, R -62 (I think that it's this one)

science
D. Firecrackers are converted to thermal energy when they burn.

Physics
You jump from a height of 1.0m from the surface of the Earth. The Earth will actually move a bit as you land. a.) Explain Why b.) Estimate the distance the Earth moves, listing any assumptions you make

social studies
K thank you

social studies
How did Muslim Turks influence turkey's development?

Chemistry
you have 5% formic acid solution and a 5% acetic acid solution. You titrate 5mL each with .1868M NaOH. A. Which will need more NaOH to reach the end point? B. How much more?

math
What is the expected value of the cost of of claims on a males drivers policy? Note: number of drivers is 9634 number of claims is 977 and the average cost per claim is 6108 euro

Physics
A small rock with mass m moves at velocity v0 and hits a rod of mass M as shown. The rod is initially at rest. The collision is completely inelastic. a) What is the angular velocity of the rod after the collision? b) What is the maximum angle the rod makes with the vertical?

Algebra II
How can you completely factor the following polynomial: 6x^5-51x^3-27x

chem
Calculate the equilibrium concentration of NH3,Cu^2+,[ Cu(NH3)]^2+ ,[Cu(NH3)2]^2+,[Cu(NH3)3]^2+,and[Cu(NH3)4]^2+ in a solution made by mixing 500.0 ml of 3.00 M NH3 with 500.0 ml of 2.00*10^-3 M Cu(NO3)2. The sequential equilibria are Cu^2+ +NH3---->[Cu(NH3)]^2+ ka1=1.86x10...

chem
Thanks!

chem
the following experiment was performed in the laboratory : an excess of solid SrCrO4 is vigorously shaken in water until a saturated solution is obtained. The excess solid is filtrated from the solution and 25.00 ml of the solution is titrated with 0.0115 M fe(no3)2 solution. ...

Physics
A block is on the end of a massless cable that is tied to a frictionless wheel (uniform disk) as shown in the figure at right. The wheel has a radius of 0.4 m. The system is initially at rest. If the block moves downward, with a constant acceleration, a distance of 2 m in 3 s...

Chemistry
You have a 250ml solution of 0.13M calcium iodate. How many grams of potassium iodate need to be added to the solution to begin to precipitate calcium iodate? The solubility product constant for calcium iodate is6.47 *10^-6. B) you have a 250ml solution of 0.13 M calcium ...

physics
How did you get three? .-.

physics
Upwards

physics
A stone is thrown from a height of 1.8 with a velocity of 29.4. How long does it take to reach its greatest height? I'm sure it has something to do with the s=ut+1/2 at squared not sure though

Marie Ernestine
Math/Science A car starts from rest and moves at the speed of 30 kph after half an hour. What is the cars acceleration?

science help ASAP
The answer for the first one is correct and the answer for the second one is D.

physics
Any ideas? A bird flying at 3m/'s west is given an acceleration of 1ms after five seconds what I'd it's velocity and how far has it travelled from its starting point?

physics
Got the answer it's basically 5-2/2.1=1.43s

physics
Relating to the first question. How long did it take to do this?

physics
Thanks. I understand it now. But we have like set formulas in our tables for incidence like v=u+at etc. I have learnt the changing velocity over time but in a test situation would I have to use the formulas given or the method appove?

physics
So basically I got this question and it's baffling. Over a distance of 5m the speed of a bicycle increase's from 2ms to 5ms what I's the magnitude of acceleration?

Social Studies
bro bro the 2nd one?

Social Studies
plz tell the second one Bihh

Social Studies
Yeah what is the second answer

Math
A boat pilot wishes to go in a straight line across a river from the east dock to the west dock in a ferryboat that has a still water speed 8.0 knots. If the river has a Southward current of 2.5 knots, what compass heading should be maintaned while crossing the river? What is ...

physics
20

math
189

kon
can someone edit my essay?

Rucker Blvd
It is 68

history
what event convinced south Carolina to spend representatives to the first continental congress ? A. passage of the currency act B. passage of the intolerable act C. passage of the navigation act D. passage of the stamp act is it D

calculus
find the first and second derivatives for 3x^4-4xy^2+7=2y

Algebra 1
A drama club wants to raise at least \$500 in ticket sales for its annual show. The members of the club sold 50 tickets at a special rate of \$5. The usual ticket price the day of the show is \$7.50. At least how many tickets do they need to sell the day of the show to meet the ...

Math
8arrangments

Social Studies
which of the tive themes includes the human and physical features at a specific location

Language Art
A B A C 100% thanks

Science
What is the total displacement of two trips one 10km north and the other 24km east

Social Stuides
Hm, do you have any ideas on what it inspired then Reed?

Social Stuides
I'm actually currently surprised I didn't think of that, good idea!

Social Stuides
Wow, thank you for the help! Now I should be able to finish up this project! :D

Social Stuides
That's actually pretty good! Thanks, but i'll also want something more then ang gaming system. I'm going to defintaly use this.

Social Stuides
What were some inventions that were inspired by the telephone? I've already got computer, please don't say another phone like the cell phone and smart phone. Thanks!

English