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Posts by Jack

Total # Posts: 1,789

maths
the perimeter of a rectangle is 12 c.m and its length is 4 c.m . what is its width? and the area?

maths
the area of a rectangle is 12 square c.m and its length is 4 c.m what is its width?

maths
what is the area of a rectangle of length 6 c.m and width 3 c.m ? what is its perimeter/

maths
a owns a rectangularers compound of length 40 meters and width 25 meters what is the area of this compound in ares

Math
Evaluate the given indefinite integrals. ∫ (x+2)(2x+3)^1/2

math
I used a program to draw a circle inside a triangle using height = 3 radius and it was fit !

math
Prove that the least height (h) of a triangle contains a circle of radius (r) is h=3r

Math
How do you solve 2(15a-3)=10a-46

math
a * b = 30 .....1 a - b = 7 ..... 2 a = 7 + b ......3 (7+b)(b)=30 b^2+7b-30=0 (using quadratic formula) b = -10 or b = 3 a = -3 or a = 10

Thermodynamics
Determine the units of viscosity,m, in the following equation: t=m(du/dy), where t is a shear stress, u a velocity, and y is a distance in (a) the Engineering English system, and (b) the SI system.

UOP
o test the hypothesis that students who finish an exam first get better grades, Professor Hardtack kept track of the order in which papers were handed in. The first 25 papers showed a mean score of 77.1 with a standard deviation of 19.6, while the last 24 papers handed in ...

math
Hi would you please show how to know if the function is differentiable or not ? please show me the answer with examples

math
Hi I Have A Question About Rolle's Theorem Why We cant solve [ F(x) = abs(x) ] ? *abs = absolute

Finance
A court has ordered Security Enterprises to pay 200000 in two years and 500000 in five years. In order to meet this important liability, they wish to invest in a combination of two-year 10% par-value bonds with annual coupons and five-year zero-coupon bonds. Each of these is ...

geometry
1. a 2. d 3. d 4. b 5. d The final score is 5/5 (100%). I know it is correct because I got them all right. I hope that helps. :)

Math
thanks

Math
Find the equation of the diameter of the circle x^2+y^2-6x+2y=15, which, when produced, passes through the point (8,-2).

chemistry
An analytical chemist determines that an unknown sample contains 0.3452 mol of LiCl. How many atoms of chlorine does this sample contain?

maths
2 over 5 plus 1 over 8 equals blank plus blank equals

Maths
x^3+a^3 Factor= (x-a) what is the remaninder when you divide x^3+a^3 by (x-a)? Please show me your working out

physics
The hero pursues the villain up to the top of a bungee jumping apparatus. The villain appears trapped but to create a diversion she drops a bottle. The hero quickly straps on the bungee cord to his leg and dives straight down to grab the bottle while its still in the air. ...

algebra
Find the x-intecepts, for the graph of the equation: y=x^2+4x-5

math
what is the unit rate for $3 for 4lbs.

physics
2.5

Math
Suppose $1.00 amounts to 1.082431 at 8 % compounded quarterly. How much does $200 amount to? (a) $ 126.82 (b) $ 101.46 (c) $ 216.49 (d) $ 380.47 (e) $ 250.00

Chemistry
Ethanol (C2H5OH) is synthesized for industrial use by the following reaction, carried out at very high pressure. C2H4(g) + H2O(g) C2H5OH(l) What is the maximum amount of ethanol (in grams) that can be produced when 1.0 kg of ethylene (C2H4) and 0.014 kg of steam are placed ...

math
Kayla has 5 quarters, 3dimes,2 nickles and 5 pennies. How many different combonations of coins can she make to have 0.50?

pre algebra with pizzazz 239
Idk

Living environment
Homeostasis

Physics
Once a 15 kg crate is in motion on a horizontal floor, a horizontal force of 51 N keeps the crate moving with a constant velocity. The acceleration of gravity is 9.81 m/s What is µk, the coefficient of kinetic friction, between the crate and the floor?

physics
In 1976, the Lockhead SR-17A Blackbird set the record speed for any airplane: 3.53x10^3 km/h. suppose you observe this plane ascending at this speed. For 20.0s, it flies at an angloe of 15.0 degrees above the horizontal, then for another 10.0s its angle of acsent is increased ...

History Please Please
thank you very much for your help.

History Please Please
Could you please explain to me: how was the structure (Collosus of Rhodes) effective for it's stated purpose? I don't understand the question and I need something for my project. Pleaseee.

Physics
The Earth's rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2006 the Earth took about .840 s longer to complete 365 revolutions than it did in the year 1906. What was the average acceleration of the Earth during this time? ...

physicsURGENT
An 85 cm long pendulum with a 0.80 kg bob is released from rest at an initial angle of θ0 with the vertical. At the bottom of the swing, the speed of the bob is 2.8 m/s. What angle does the pendulum make with the vertical when the speed of the bob is 1.4 m/s?

math
A set of 100 open lockers are numbered from 1 - 100. Sarah comes by and closes all the lockers with even numbers. Then Sarah walks past the lockers again and checks the ones numbered with multiples of 3. If the locker is closed, she opens it; if it is open, she closes it. She ...

History
Colossus of Rhodes: Was the structure effective for its' stated purpose?

Math
thank you very much

Math
A computer game starts with a set of 144 tiles separated into 36 equal groups.Sara played the game until there were 8 groups of tiles left.How many tiles were left when Sara finished? How do you get 32 tiles?Can you please explain?Thanks

Math
240 / 6= 40 in both teams. So I don't know how to explain this problem to the teacher because I have to justify my answer. Please help me. Thanks

Math
A computer game starts with a set of 144 tiles separated into 36 equal groups.Sara played the game until there were 8 groups of tiles left.How many tiles were left when Sara finished?

math
I Wanted To Find The Square Root Of (1-2i) But I Didn't Know How To Solve It. My Solution : x+yi = sqr(1-2i) x2-y2+2xyi = 1- 2i x2-y2 = 1 2xy = -2 y = - 1/x x2 - (-1/x) = 1 ] * x2 x4-x2-1 = 0 How To Evaluated (x4-x2-1) ? I Tried To Sol

Calculus
thanks Damon, in HS and this is kicking my butt!

Calculus
equation of tangent line of the function sqrt (3x+5) where x=10

calculus
A trough is 16 ft long and its ends have the shape of isosceles triangles that are 5 ft across at the top and have a height of 1 ft. If the trough is being filled with water at a rate of 11 ft3/min, how fast is the water level rising when the water is 7 inches deep?

Physics
35=a 7.94=t

Math
I Don't Know What Is This Subject Called In English But It's About Complex Numbers it says 25 = 16 - 9 i^2 = (4 ± 3i) But My Teacher Says 25 = 25 - 0 i^2 = (5 ± 0i) I Think My Teacher Is Wrong , The Result Is 25 But There Will Not Be Complex Number ...

Calculus
yeah that's what I meant

Calculus
If f(x)=[x−1/(1+5 x)], there are two points on the graph of y=f(x) at which the tangent lines are parallel to the line x−2y=2. Type in the x values of these points. Type the smaller number first, then the larger number.

U.S HISTORY
thanks but i still didn't find the answer

U.S HISTORY
What was Benjamin franklins reaction to the colonies refusal to accept the Albany plan of union?

U.S HISTORY
then do it

U.S HISTORY
LIST TWO REASONS THE FRENCH FELT THREATENED BY BRITISH INTEREST IN THE OHIO RIVER VALLEY?

U.S HISTORY
THANKS, SO WHAT IS THE ANSWER. I REALLY NEED IT NOW FOR MY HOMEWORK :)

U.S HISTORY
WHY DID COLONISTS CONSIDER GEORGE WASHINGTON A HERO, EVEN AFTER HE WAS DEFEATED BY THE FRENCH? PLEASE ANSWER IT THANKS JACK

islamic studies
it was actually my friend that asked the question not me so i put his name

islamic studies
THANKS FOR HELPING ME.

math
is 0 a multiple of every number?

Math PLEASE HELP
what is the sequence for fibbinachi higher than 1,000,000?

algebra
#1 I would do (11*0.6)+(11*5) #2 (3*0.4)+(3*0.5) Figure out the rest!

Chemistry
1. Molarity is to moles of solute over liters of solution as molality is to A. molar concentration over molal concentration. B. moles of solute over kilograms of solvent. C. molal concentration over molar concentration. D. moles of solute over moles of solvent. 2. In ...

English
what is the rhetorical strategy used in this parapgraph and what is the effect/function. Please quote the sentence of where the rhetorical strategy is used. Paragraph: But for the rest of us, the sovereign freedom of traveling comes from the fact that it whirls you around and ...

chemistry
Please explain me which solution reacts faster to breakdown the materials the 25% or 10% HCL?

statistics
what sampling technique is used if a quality-control inspector selected every 20th DVD player as it came off an assembly line

Chemistry
1. Molarity is to moles of solute over liters of solution as molality is to A. molar concentration over molal concentration. B. moles of solute over kilograms of solvent. C. molal concentration over molar concentration. D. moles of solute over moles of solvent. 2. In ...

math
What Is The Integration Of (0)?

chemistry
Consider the following unbalanced reaction: Fe2O3 (s) + CO (g) --> Fe (s) + CO2 (g) How many moles of carbon dioxide are produced per mole of iron (III) oxide reacted.

Physics
A particle travels to the right at a constant rate of 6.8 m/s. It suddenly is given a vertical acceleration of 1.8 m/s2 for 5 s. What is its direction of travel after the acceleration with respect to the horizontal? Answer between −180◦ and +180◦ and What is ...

physics
A compact disc spins at 2.3 revolutions per second. An ant is walking on the CD and finds that it just begins to slide off the CD when it reaches a point 3.5 cm from the CD's center. What is the coefficient of friction between the ant and the CD?

Networking
.032%

phy
regarding #5: That answer would be correct if both balls were thrown at the same time. The problem states the red ball was thrown downward 2.6 seconds after the blue ball was thrown. One solution is to determine the position and velocity of the blue ball at the time the red ...

physics
Convert 25 meters to centimeters and gigameters.

Physics
Convert 25 meters to centimeters and gigameters.

Physics
Convert 25 meters to centimeters and gigameters.

chemistry
how do you calculate density of a substance with a mass of 100g and a volume of 48ml

maths
What are the steps to solve it? lim (x^2+y^2)/(sqrt(x^2+y^2+36)-6) as (x,y) approaches (0,0)

physics
A canoe has velocity of 0.40m/s southwest relative to earth.the canoe is on a river that is flowing 0.50m/s east relative to earth find the velocity (magnitude and direction) of the canoe relative to the river.

physics
plz anyway help me for the solution of this question. from the top of a tower P,a ball is thrown vertically upwards.when the ball reaches a distance h below P,its speed is double of what it was at height h above P.show that the greatest height attained by the ball above P is ...

physics
a roller whose diamater is 1.0m.weight 360N.what horizontal force is necessary to pull the roller over a brick 0.1m,heigh when the force is applied at the centre?

Math
place decimal points in 190563 and 865 so that their difference is 181.913

PreCal
Find the distance between P1(3, –195°) and P2(–4, –94°) on the polar plane. Round your answer to the nearest thousandth.

PreCal
Thank YOU!!!

PreCal
A surveyor records the polar coordinates of the location of a landmark as (40, 62°). What are the rectangular coordinates? Round each coordinate to the nearest hundredth.

geometry
find the variable and LN if M is between L and N LM=8a,MN= 7a,LM=56

math
How Can I Find The Value Of (10 ^ -0.1) (Without Using Calculator)

maths
270

Geometry
A company produces cardboard boxes with the top, bottom and sides measuring 5 feet. It costs the company 4 cents a square foot to make each box. The square footage is determined by finding the area of all six sides of the box. Find the cost to make 100 boxes.

Physics
A roller coaster moves 85m at 35 degrees S of W, and then travels 30 m at 45 degrees W of N. What is its displacement from its starting point?

Approximation
Find The Value Of (Sin 31) Using Approximation ?

math
A Glass Of Water Is Being Filled With Water At The Rate Of 12 Pi Cm^3/sec And the radius of the top is 6 cm and the radius of the base is 3 cm and the height of the glass is 12 cm , find A) dh/dt and B) radius when the height of water is half?

Trig
Find [4(cos115+isin115)]^6

Algebra
4x+2y-3z=7 2x+4y+z=35 6x+2y-2z=20 solve the system

geometry
look at the right triangular prism. Which side is perpendicular to edge ce at point e?

english
Identify the complete Adjective clause The car i drive has 50,000 miles on the odometer. i need to find the Adjective clause in this sentence, Thanks, Jack

Chemistry
A solution of hydrochloric acid is placed on a balance. Magnesium metal is added and the mass is recorded. The solution is stirred and the mass of the solution is recorded every 10 minutes. The following data is collected:

algebra
Could somebody tell me in simple terms why equating coefficients works in partial fraction decomposition? Like a simplified proof or something? I don't understand why.

computer science
which job titles are consistent only with the java language?

math
Two trains leave a train station at the same time. One travels east at 10 miles per hour. The other train travels west at 9 miles per hour. In how many hours will the two trains be 85.5 miles apart

writing
What is the facts and figures that define the problem(cause)

math
Find all the points having an x-coordinate of 9 whose distance from the point (3, -2) is 10. (9, 6), (9, -10) (9, 13), (9, -7) (9, -12), (9, 8) (9, 2), (9, -4)

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