Saturday
August 2, 2014

Posts by Matt


Total # Posts: 1,729

math
The windows of a downtown office building are arranged so that each floor has six fewer windows than the floor below it. If the ground floor has 52 windows, how many total windows are on the first eight floors?

math
What is the sum of a 10–term arithmetic sequence where the first term is 3 and the last term is 75?

physics
A beam of light makes an angle of θi = 7.0˚ with the normal of a slab of transparent material of t=1.00-mm-thickness. If the index of refraction of the glass is n2 = 1.40 , how far vertically (d) is the point at which the beam leaves the glass surface from the point ...

physics
A beam of light makes an angle of 13.0° with the normal of a mirror made of 4.70-mm-thick glass silvered on the back. If the index of refraction of the glass is 1.30, how far is the point at which the beam leaves the glass surface (after being reflected from the silver bac...

Calculus
Use five iterations in Newton’s method to estimate the root of cos(2x)-2x.Use x0 = π/4 and eight decimal places.

physics
The four wires that lie at the corners of a square of side a= 5.60 cm are carrying equal currents i= 1.80 A into (+) or out of (-) the page, as shown in the picture. Calculate the x-component of the force on a 1.0-cm long piece of the lower right-hand wire, due to the other th...

Calculus.
What is the derivative of [(3t+4)/(6t-7)]^3?

MAth Im stuck on question can anyone help me ?
I think it is C becuase the denominator would be 2*2*2 which would be 8.

chemistry
what volume of nitrous oxide gas N2O has the same number of atoms as 9.0 liters of neon gas at the same temperature and pressure

Calculus
ok, thats what i got! thanks so much

Calculus
What is the limit as t approaches 0 for (sint)/(1+cost)?

Statistics
Twenty people are to be seated at 3 Circular restaurant tables that seat 8,7, and 5 people respectively. Determine the number of ways that this can be done. Express your answer in scientific notation to two decimal place.

Physics
A cirular coil of 19 turns and radius 10.2cm surrounds a long solenoid of radius 2.6cm and 1.00x103 turns per meter. The two are oriented so that the axis of the coil and the axis of the solenoid are parallel and the center of the coil is at the center of the solenoid. If the ...

Physics
A cirular coil of 27 turns and radius 15.0cm surrounds a long solenoid of radius 4.7cm and 1.00x103 turns per meter. The two are oriented so that the axis of the coil and the axis of the solenoid are parallel and the center of the coil is at the center of the solenoid. The cur...

religion
what sociopolitical issues helped spur the Reformation?

Math
If glenda rolled two six-sided number cubes nine times and computed the sum of the numbers rolled each time. If the mean sum of Glenda's rolls was 6 what was the total of the nine sums Glenda rolled? Suppose Glenda's rolls were 12,7,3,10,9, 2, 11, 7 and 8. What is the ...

chemistry
What is the pH of a 2.23 M HCHO2, formic acid, aqueous solution at 25 °C? ( Ka = 1.8E-4 )

math
A drawer contains 7 black socks, 5 white socks, and 3 brown socks. What is the probability that 2 white socks will be removed in succession?

physics
In the high jump, the kinetic energy of an athlete is transformed into gravitational potential energy without the aid of a pole. With what minimum speed must the athlete leave the ground in order to lift his center of mass 1.65 m and cross the bar with a speed of 0.75 m/s?

Quantitative methods
Assignment Problem 1* Print Media Advertising (PMA) has been given a contract to market Buzz Cola via newspaper ads in a major southern newspaper. Full-page ads in the weekday editions (Monday through Saturday) cost $2000, whereas on Sunday a full-page ad costs $8000. Daily ci...

Physics
What is the time lapse between seeing the lightning strick and hearing the thunder 17 km away

physics
A mass of 0.755 kg is attached to a horizontal spring of constant 403 N/m as shown. The system is compressed a distance xa = 20.8 cm from its equilibrium position and released from rest. The coefficient of friction on the surface is μ = 0.354. The mass comes to rest again...

Physics
emily, the question is 72 CM, not 72 meters. convert the 72cm into .72m. (mass) X (Speed)2/(distance .72) - (mass)(gravity) for the other other one add the two together.

Math
two people aged 15 and 50. At some point during their lives, the elder will be three times the age of the younger. Write an equation which models how old in years each will be when the elder will be three times as old as the younger person.

PHYSICS
A copper vat is 10 m long at room temperature (20 degrees C). How much longer it is when it contains boiling water at 1 atm pressure? Air in a balloon does 50 J of work while absorbing 70 J of heat. What is its change in internal energy? A bottle containing 3 kg of water at a ...

Math
Determine whether u and v are orthogonal,parallel, or neither. u=-2i+j v=3i+6j

Math
An airplane has an airspeed of 724 kilometers per hour at a bearing of 30 degrees.The wind velocity is 32 kilometers per hour from the west. What are the groundspeed and the direction of the plane?

General Chemistry 1
If you heat copper sulfate pentahydrate to long or at too high of a temperature, what compound(s) is formed?

math 2
What is the scale factor for 1 inch = 20 feet?

Calc
derivative of (x^2+14)/x

Chemistry
the value 3.0x10^-5 was wrong for me?

Calculus-particle motion
1. A particle is moving on the x-axis (or any number line) Its position x(t), or distance from the origin, at the time t is given by x(t)=4t^3-16t^2+15t. t is greater than or equal to 0 a.) Where is the particle when it is at rest? b.) During what time interval is the particle...

Biology
In a cell undergoing meiosis, which sequence of events is shown in correct order? A. the cytoplasm divides, chromosomes line up at the equator, nuclear envelope forms. B. chromosomes become visible, chromosomes line up at the equator, chromosomes gather at the poles of the cel...

Physics
A 31.0 kg crate, initially at rest, slides down a ramp 2.6 m long and inlined 14 degrees with the horizontal. Using the work-kinetic energy theorem and disregarding friction, find the velocity of the crate at the bottom of the ramp

Physics-Help Please!!!
A 31.0 kg crate, initially at rest, slides down a ramp 2.6 m long and inlined 14 degrees with the horizontal. Using the work-kinetic energy theorem and disregarding friction, find the velocity of th crate at the bottom of the ramp

Physics
A 31.0 kg crate, initially at rest, slides down a ramp 2.6 m long and inlined 14 degrees with the horizontal. Using the work-kinetic energy theorem and disregarding friction, find the velocity of th crate at the bottom of the ramp.

Physics
Marko 1.51^2 /g doesn't equal 2.2801g it equals 2.2801/g. So your answer is the reciprical of the right answer. Nice try though.

algebra
You have to subract the second equation from the first equation. Make sure to put the second equation in parenthases and distrbute the negative sign!

chemistry
An unknown metal will be used in this experiment. If you do not remove the moisture between trials houw would moisture effect the dendity in a graduated cylinder calculation?

Dynamics
Car A is moving at a constant speed Va=75 km/h, while car C is moving at a constant speed Vc=42 km/h on a circular exit ramp with radius p=80m. Determine the velocity and acceleration of C relative to A.

Calc
Suppose that a function f(125)=52 and f'(125)=4. Estimate f(123.5)

Calc
suppose that f(x) is a function of f(125)=52 and f'(125)=4. estimate f(123.5)

chemistry
How many molecules of ethane (C2H6) are present in 0.524 g of C2H6?

Biology
Which of the following statements about sexual and asexual reproduction is FALSE? A)Genetic diversity occurs in sexual reproduction. B)Asexually reproducing organisms can repair their own DNA. C)There are no special reproductive cells in asexual reproduction. D)A gametophyte p...

12th grade chemistry
If the reaction below proceeds with a 96.8% yield, how many kilograms of CaSO4 are formed when 5.27 kg SO2 reacts with an excess of CaCO3 and O2? 2 CaCO3(s) + 2 SO2(g) + O2(g) 2 CaSO4(g) + 2 CO2(g)

math
a sum of 102,000 is to be split by 3 people, (1) gets 5 times as much as (2) which gets 2/5 as much as (3). how is this problem solved

Business
Hey guys. I really need your help picking out a new business name. Which do you like/find catchier??? The business is a local "swapping" online site. Thanks a lot. SwapEm Swap Ventures SwapEm Local

physics
Explain the effect increasing temperature has on the following situations and what is happening at the molecular level to cause it. (a) the speed of sound in air (b) the current in a wire THANKS

Calculus
find the limit of lim 7= as x approaches 8

math
where did you get the 2?

math
how do you find the square root of 49x^5?

science project
need to take an object from point a to point b and back to a and your only allowed to touch the project once to start. any ideas? No batteries, electric or blowing on it allowed. You can use water and magnets.

math
im pretty sure its 256. These r permutations right

math
mr. m has an 8 inch by 11 inch sheet of paper. He created a box by cutting congruent squares from each corner.The base of his box is 54 square inches.How much did he cut from each corner.

Science
nucleus

physics
A 1200 kg car is traveling at 45 km/h and hits a 1000 kg car parked on the edge of a 70 m deep canyon. What is the velocity of the two car wreck?

math
it is a typo the problem starts at the word Jocelyn

math
J1 3/4 Jocelyn is currently 1 3/4 feet taller that 2/3 her brother's height. If jocelyn is 4 1/2 feet tall then how tall is her brother jesse? How much taller is Jocelyn

Math
In a right triangle, if the median from the right angle to the hypotenuse is 5 in. what is the length of the hypotenuse?

9th grade alegbra
u^2-8=7u

PreCalc
That does not seem right to me because when i graph it, they turn out different.

PreCalc
Write the following expression as one logarithm: 2logx-log4-log3+logx. Simplify your answer.

Math
Make into one log function: 2logx-log4-log3+logx

Math
Make into one log function: 2logx-log4-log3+logx

Pre-Calc
Make into one log function: 2logx-log4-log3+logx

math
Make into one log function: 2logx-log4-log3+logx

Physics
An alpha particle (mass=6.68x10^-27kg)is emitted from a radioactive nucleus with an energy of 5.00MeV. How fast is the alpha particle moving in m/s? (1 MeV= 1.6x10^-13J). I dont know how to start to solve this problem A.2.40x10^7 m/s B.1.55x10^7 m/s C.3.70x10^6 m/s D.1.85x10^6...

math
a cab charges the following fare for ea. trip...first 1/4 mi $2.95 for every additional 1/4 mi or part $0.65 (a)what is the fare for a distance of 1 5/8 mi? my answer...I got $8.85 (b) what is the fare for a didtance of 10 3/4 mi? My answer...$30.25 (c)what is the possible dis...

physics
if the length of a pendulum is 0.8m what is the period if the angular deflection is 30 degrees?

physics
a motorist runs out of gas and must push his 3000kg car across a flat road 200m to the gas station. ignoring friction how much work must be done in order to get the car to the gas pump? if the motorist accomplishes this in 10 minutes, how much power has he applied? what if the...

science
find a chart to help with blood types and rh. allele combinations

lgrammer
can you give me an example of a sentence with subject pronoun, action verb, adverb phrase, verb, subordinating conjunction, adverb, linking verb, subject, infinitive phrase?

math
f by 5ftind area of shaded rectangle to nrarest tenth. rectangle has circle in middle. the shaded area is 3ft

Physics
A 0.40-kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.3 m on a frictionless surface. If the cord will break when the tension in it exceeds 60 N, what is the maximum speed the ball can have? How would your answer be affected if there were ...

acc 225
An antique store has one employee who is given cash and sent to garage sales each weekend. The employee pays cash for any merchandise acquired that the antique store resells.

Calculus AB
A police car is chasing a suspect. The policemen is at point y=0.6 (north of an intersection) and the suspect is at point x=0.8 (east of the intersection). The police car is traveling at 60mph. Their radar gun reads that the suspect's car is getting away at a rate of 20mph...

5th grade
what is the magnitude estimate for 78.6 divided by 6

algebra
what did the beaver say to the tree? using only these letters egatkwolifunydcsmb. you may use these letters more than once

science
the temperture in which all motion of particles stop

5th grade
$12

Algebra-Did I even begin correctly?
Thank you

Algebra-Mathmate, Reiny or Dr. Bob-please double check-Did I even begin correctly?
Please check the above problem-Thank you

Algebra-Did I even begin correctly?
would 27/3^2 = 3 then in the equation so I would write it as log(6)3 Thanks for trying to help-I appreciate it-maybe I can repost for mathmate or Dr. Bob or Reiny

Algebra-Did I even begin correctly?
How would I write log(6)27-2log(6)3 as a single logarithm Would I start by getting rid of the (-2)- I know its the same log6 but what would I do with the 27 and the 3 I'm really confused on this one and I have to solve several similar ones with no clue on how to it-I'v...

Algebra II
How would I write log(6)27-2log(6)3 as a single logarithm I'm confused on this one Thanks for any help you can provide

geometry
Given a circle with the radius of 2, which is the degree measure of an arc whose length is 1/2 pi?

SOCIAL STUDIES
What qualifications are needed for a country to become a world power?

Matth
Kenneth works for albertsons as a cashier. He earns $9.25 per hours and he works 20 hours each week. Write an expression that could be used to determine his total earnings for 1 year

MATH
I don't get it?

12U Physics
An object is moving down a ramp that has mu=0.150. It initially starts at (0,1), and the bottom of the ramp is at (sqrt(3),0) Show that the parametric down the ramp are given by: ht tp://img819.imageshack.us/img819/5993/screenhunter03dec061758.gif I know the kinematics equatio...

physics
thanks, that helped a lot!

physics
okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59. how would i figure ou...

physics
okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59. how would i figure ou...

college physics
9.5 cm

science
Tell Nartker that he's an ass

physics
A source of sound (1200 Hz) emits uniformly in all directions. An observer 2.99 m from the source measures a sound level of 41.1 dB. Calculate the average power output of the source.

physics
okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59. how would i figure ou...

physics
okay the question i got was asking the lengths of the first, second, and third waves of a standing wave, of a string that is fixed at both ends. the strings length is 2.38 meters. Ive already figured out the three lengths, being 4.76, 2.38, and then 1.59. how would i figure ou...

Physics
A vertical cylindrical cylinder, closed at the bottom end, contains 0.0100 moles of gas. It is fitted at the top with a piston, which can move freely. The mass of the piston is 14.0 kg and the initial height of the piston above the bottom of the cylinder is 25 cm. What is the ...

Physics
An automobile tire has a volume of 0.0185 m3. If the pressure in the tire is 500 kPa and the temperature is 298 K, how many molecules are there inside the tire?

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