# Posts by k

Total # Posts: 928

Surface area of threaded hollow tube
I have a question for calculating the surface area of a threaded cylinder,there are ten about 19 little threads in one inch, the rod is about 6 inches, the outer diameter is about 0.6 in and the inner diameter is 0.02. Each thread is 0.014 thick if that matters, I just have no...

biology
In order to maintain homeostasis, human cells must have a higher concentration of sodium ions outside the cell than inside the cell. In addition, the concentration of potassium ions must be higher inside the cell than outside the cell. Which of the following forms of cellular ...

Social studies
2. Why would the loss of farms make it especially difficult for the southern economy to recover? •Many southern industries would fail without the crops •The southern economy was largely based on agriculture. •Most Southerners could not afford to rebuild farms &#...

English
"The sun was shining on the sea, Shining with all his might: He did his very best to make The billows smooth and bright — And this was odd because it was The middle of the night. The moon was shining sulkily, Because she thought the sun Had got no business to be ...

Math geometry
1) The base angles of an isosceles triangle are (50-x)^6 and (30x-12)^6 what is the vertex angle? 2) The area of a trapezoid is 52cm^2 if it's bases are 8 cm apart find the sum of their heights 3) What is the area of a circle inscribed inside an equilateral triangle whose ...

Math
How many positive integers, not having the digit 1, can be formed if the product of all its digits is 33750. With solution pls:)

Math
K: 1) simplify: 1 - 1/2 + 1/4 - 1/8 + 1/16 - 1/32 2) Simplify: (1/2 - 1) - (1/3 - 1) + (1/4 -1) 3) In the proportion x^2 : 27 = 9 : x^3, what is x? 4) Between what two consecutive integers does cube root of -100 lie? 5) What is the area of a rectangle whose sides are thrice as...

Mathematics
2 people are in one red car 1 red car = 2 2 red cars = 4 1st blue car = 1 2nd blue car = 3 3rd blue car = 4 So 2+2+1+3+4 = 12 :)

math
Part of the road is to be on a parabolic curve given by a function of the form y = ax2 + bx + c where x and y are local co-ordinates. The road alignment must pass through the following 3 points:- x = 150m y = 190.650m x = 300m y = 611.450m x = 450m y = 831.141m 5.1. Substitute...

American Government
Thanks Ms. Sue! I only got one wrong, which was 6. 6 is A.

American Government
I need help on my American Government quiz.. Not looking for answers but for someone to see if mine are right, and if not, to help me out. Thanks! 1. When categorizing the Executive Offices of the President, what can you assume when noting the number of departments devoted to ...

Math
SOMEONE HELP ME

Math
Key:8 | 3= 8.3 what does 7|2 mean in the same stem and leaf plot

Pre cal
Determine all x-intercepts, vertical asymptotes, horizontal asymptotes, and removable discontinuities of f (x)=(x^2-x-6)/(x^3-4x).

biology
If the first child of a couple was without dimples, an recessive trait, what is the chance that the second child will be born without dimples? A) 100% B) 25% C) 50% D) Cannot be determined from the phenotype of the child

math

math
If lim?(n??)??(x_n-x)/(x_n+x)?=0, prove that lim?(n??)??x_n ?=x.

A ladder is placed 4 ft from the side of a building. The top of the ladder must be 13 ft off the ground. What is the shortest ladder that will do the job? 4^2 + 13^2 = x^2 16+169=185^ =34,225

physics
some rocks melt at 1800farenheit. what is the temperature in the celsius scale ?

physics
Does the baby have feever ?

physics
The normal temperature of the human body is 37Celsius. a baby temperature is 98farenheit. DOes the baby a fever? Why?

physics
where did u get 12.53m/s

physics
a 15kg rock falls from the top of a building 8.0 high. Find its PE and KE a.when at rest at the top of the building b. halfway down the ground c. when it reaches the ground d.speed when it reaches the ground

physics
a man pushes a lawnmower 50ft in 5s by exerting a force of 30lb at an angle of 53degrees with the horizon. find the work done and the average power expended in horsepower. Answer Please need help

physics
you can check if my answer is correct the work is 58.8J and power is 19.8watts ?

Absolute Inequalities
It's always true? How would I show my work on this

Absolute Inequalities
4-|2x-3|<=9 How do I deal with a negative absolute?

chemistry
.362425

Trig
#1 only 1 triangle possible because 152+44>180

Trig
Can someone check my answers? Find # of triangles possible: <A=44.3, a=11.5, b=7.7 ... 2 triangles, B=~27.9 or B=~152.1 <A=29.3, b=20.5, a=12.8 ... 2 triangles, B=~51.6 or B=~128.4

Math
Using numbers 2,3,5,10, 24 make the number 120

THANKS KAT SOO MUCH

science

algebra
. On the reality TV show Last Man Standing, a package is thrown from a plane to the ocean below. The contestants must swim to the package to receive the “free pass” located inside the package. The path that the package follows can be modelled by the quadratic ...

math
Find the point in the xy plane which is equidistant from (1,1), (7,1), and (1,9). Please and thanks.

Language Arts, can anyone check?
It is A, B, A, D

Math
Duh, isn't it obvious? Janice is cheating by asking questions from her AoPS Geometry homework. This question has been asked by many others who are taking the same course. However, this will get you nowhere.

Pre Algebra
I GOT YO BACK IS 100% CORRECT. THANK YOU

physics
For the next part, you will need to know that the position d of an object attached to a spring that oscillates with period T=1.0s is a sinusoidal function of time: d=kcos(2πt)d=kcos(2πt) for some constant k. Assume that the initial position of the object is d0=2.0cm...

yes its D

Math
Find the least positive integer that leaves remainders of 1, 2 and 3 when divided by 3, 5 and 7 respectively.

Math
so 55% is the answer @ collins? thanks for the help though

Math
A game consists of drawing a number from 1-20. A player wins if the number drawn is either a prime number or a perfect square. What is the probability of winning the game?

math
A 4cm x 5cm x 7cm rectangular prism is painted on all faces. If the prism is cut into 1cm x 1cm x 1cm cubes, how many cubes do not have paint on any of its sides?

science computer
Write a program to read the names and age of 10 people and print the name of the oldest person.assume that there are no person of the same age.data is supplied in the following form:name,age,name,age

esl
is the statement, 'the blueberries tasted delicious.' a passive statement

Math
James and his friends rolled two fair number cubes 500 times and recorded the sum of the numbers shown on the cubes each time.On 42 of the trials the sum was 10.Which of these is most likely the probability that the sum of the numbers shown on the cubes is 10 when two fair ...

Probability
I meant to just list it as math

Probability
Makoto and his friends rolled two fair number cubes 500 times and recorded the sum of the numbers shown on the cubes each time. On 42 of the trials the sum was 10. What will be the probability that the sum of the numbers shown on the cubes is 10 when two fair number cubes are ...

physics
A long straight horizontal wire carries a current I = 4.80 A to the left. A positive 1.00 C charge moves to the right at a distance 5.00 m above the wire at constant speed v = 4500 m/s . What is the magnitude B of the magnetic field at the location of the charge due to the ...

math
the high temp today was 62 degrees. when nighttime comes, the temp will drop 40 degrees. by 4 am the temp will drop an additional 40 degrees. what is the temp at 4 am?

Math
If m< 1=53 , what is m<4 -53 -43 -37 -27 If m<1=50, what is m<5 -50 -40 -35 -25 If m<4=25, then what is m<8 -105 -75 -175 -25

Physics
Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 2.50 m. Two of the spheres have a mass of 4.40 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that ...

Solid Mensuration
4709.05 lb.

Art PLZZZ CORRECT ME!!!!
Me is right 100%

bio
How many grams of MgCl2 do you need to make 2 L of a 0.2 M solution?

Spanish
What's the difference between "mensajero" and "repartidor"?

math-linear equations
x=cows y=horses x+y=340 y=x+52 Plug in x+52 for your y value on the first equation. Solve for x, and then y.

math
During a triathlon, Sharon swims 1/4 of the total route and cycles 3/5 of the remaining route. She runs the rest of the route. If she runs 3,600 meters, find the total distance if the route

chemistry
how many liters (at STP) of chlorine gas are required to produce .050L of hydrogen chloride gas?

Health
did u really copy and paste an entire test because your tiny brain cant learn simple things like 8th grade physical ed.?

physics
A particle of mass m = 0.3 kg is acted upon by a force so that its position vector, r(t)=2.0t^2(i)- 5.0t^2 (j) +t^2 (k) where t is in s. What is the (instantaneous) power delivered by this force to the particle at time t = 2.0s?

Geometry
To repair a roof that is 4 meters high, Mr. Russo leans a 5-meter ladder against the side of the building. To reach the roof, how far away from the building should he place the base of the ladder?

Health.. NEED HELP ASAP
thanks stacie!!

THANKS GRACE!!!! TOKE QUIZ!! 100%!!!

math
A researcher uses analysis of variance to test for mean differences among three treatments with a sample of n = 12 in each treatment. The F-ratio for this analysis would have what df values?

Spanish
Absolutely correct

Math
A walks 6 miles in 90 mins, how many miles does A walk in 60 minutes?

Chemistry
terrible website..?

social studies

Physics
You can shoot an arrow straight up so that it reaches the top of a 25-m-t building. (a) How far will the arrow travel of you shoot it horizontally while pulling the bow in the same way? The arrow starts 1.45 m above the ground.(b) Where do you need to put a target that is 1.45...

Algebra
Don't know

math
Tim needs to fill 3 20L barrels with oil. Oil dispenser flows at 100ml/s . How long to fill up 3 barrels. Please help by showing all steps so I can understand how the answer was determined. Thanks!

Algebra I
If a set of ordered pairs is a function, are the ordered pairs also a relation? (Also, please explain why)

Math
Thank you steve

L.A
The correct answers are B A B Just got 100% 3/3

Calculus
I know the derivative of x is 1, but I'm having a hard time proving it with the limit definition of the derivative. I have... Lim delta x ->0 (x+ delta x)-(x)/delta x = 0 But I know the answer is 1. I don't understand what I am doing wrong

math
The number of units a factory produces is estimated to increase 15% every year geometrically. The production of first years was 5000 units. Estimate the production of the fifth year.

Math Trig
Length of side answered. Can not find bearing of angle .4

Math Trig
A plane's flight path called for it to fly from J to W. W is 200kms due North and 500kms due west of J. Draw a coordinate picture. What bearing will the pilot fly and what distance will he or she go in air kilometers?

math
A planes flight path called for it to fly from J to W. W is 200km due North and 500km West of J. What bearing will the pilot fly and what distance will be traveled in air kilometers. I know to draw and image but that is it.

Math Trig
A plane's flight path called for it to fly from J to W. W is 200kms due North and 500kms due west of J. Draw a coordinate picture. What bearing will the pilot fly and what distance will he or she go in air kilometers?

Math
Pouring concrete into backyard. The patio slab will be 7m long, 2m wide and 10cm deep. How many cubic meters of concrete will you need to fill the patio?

Chemistry
Thanks!

Chemistry
Is my Henderson equation right? 10.15=9.95+log(x/(.059-x))

Chemistry
What volume, in liters, of 1.04 M KOH solution should be added to a 0.116 L solution containing 10.08 g of glutamic acid hydrochloride (Glu, FW = 183.59 g/mol; pKa1 = 2.23, pKa2 = 4.42, pKa3 = 9.95) to get to pH 10.15?

physics
Explain how it is possible for a motorcycle (mass = 250 kg) to have the same momentum as a locomotive engine (mass = 2,500 kg) i though momentum was directly proportional to mass so the more mass the more the momentum? how is it possible then?

physics
A ball (mass 12 kg) moving at 15 m/s in the +x-direction collides with a ball (mass 36 kg) moving at 5.0 m/s in the +y direction. After colliding, the 12-kg ball moves at 6.0 m/s at an angle of 30°above the +x direction. Afterward, what is the speed and direction of the 36...

chemistry
256

Language Arts
1.c 2.a. 3.d 4.b 100% pass

math plz help quick
austin great grammar!

Language Arts
all of them are but number 3

M
A woman spend half of her money on book and give 1 rupee to a man,than she sped half of rest money and give 2 rupee to a man,than spend half rest money give3 rupee to a man.at last 1 rupee left.what amound he have at first

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eoijwef

English 3
What is the message/theme in "Eulogy" by Brian Turner?

College Accounting
The Thompson Company uses activity-based costing to determine product cost. Three activities and their rates have been calculated as shown below. Setting up equipment = \$500 per setup Moving goods = \$20 per move Machining = \$4 per machine hour Thompson provided the following ...

biology
How does the plant regulate what is able to enter into the stem of the plant? Does it have something to do with the casparian strip?

Calculus
1. integral (x^3 * sqrt(x^2-4)) dx I'm confused on how to start this problem, if I am doing trig substitution.

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