Monday

July 28, 2014

July 28, 2014

Total # Posts: 373

**geometry**

Points D, E, and F are the midpoints of sides \overline{BC}, \overline{CA}, and \overline{AB} of \triangle ABC, respectively, and \overline{CZ} is an altitude of the triangle. If \angle BAC = 71^\circ, \angle ABC = 39^\circ, and \angle BCA = 70^\circ, then what is \angle EZD+\...

**geometry**

Points D, E, and F are the midpoints of sides \overline{BC}, \overline{CA}, and \overline{AB} of \triangle ABC, respectively, and \overline{CZ} is an altitude of the triangle. If \angle BAC = 71^\circ, \angle ABC = 39^\circ, and \angle BCA = 70^\circ, then what is \angle EZD+\...

**math**

Using the shadow method, Norman finds the height of a tree as follows: He measures the shadow of the measuring stick (4ft) and the tree (20ft). He then uses similar triangles to find the tree's height. If the measuring stick is 3 feet long, how tall is the tree? 4 feet squ...

**math**

George has been hired to paint the smith's house. He needs to be sure his ladder will reach the highest part of the house, so he decides to use the shadow method. The measuring stick is 3 ft., and tits shadow is 5 feet. The shadow of the house is 45 feet. The shadow of the...

**math**

e. Felix Baumgartner is a daredevil famous for breaking the sound barrier during a freefall on October 14, 2012. Aided by a weather balloon, he climbed to a height of 128,100 feet. More than 24 miles in the air, he was so high up that he could see Earth’s curvature. He t...

**Physics**

A seagull can fly with a speed of 12.5 m/s (relative to the air). (a) How long will it take the gull to fly from his perch 420. m east to the carcass of a dead fish floating in the water if the wind is from the east at a speed of 2.70 m/s? (b) Having eaten lunch (nicely aged, ...

**English**

What is the subject and the verb of the sentence : A police officer stepped into the street and stopped cars .

**English**

What is the subject and the verb of the sentence : A police officer stepped into the street and stopped cars .

**Biology**

Hydrolysis uses a catabolic reaction. Explain what a catabolic reaction is and how it is useful in creating monomers from polymers.

**math**

Wilson buys pizza every month to serve to his employees at their meeting. In February, he bought three more than twice the number of pizzas he bought in January. If Wilson bought 15 pizzas in February, how many did he buy in January?

**Chemistry **

The activation energy of a certain reaction is 34.9kJ/mol . At 23 ∘C , the rate constant is 0.0190s−1. At what temperature in degrees Celsius would this reaction go twice as fast?

**college chemistry**

After 94.995 seconds the concentration of A was reduced from 0.3688 M to 0.1464 M. What is the first order rate constant?

**chemistry**

By how much will the vapor pressure of water decrease if a solution at 40.0°C is produced by dissolving 16.0212 g of K3PO4 (formula mass = 212.30 g/mol) with 40.8480 g of water. The vapor pressure of pure water at this temperature is 55.30 mmHg. If the solute is ionic, ass...

**College algebra**

Things did not go quite as planned. you invested $8,000, part of it in a stock that payed 12% annual interest. However the rest of the money suffered a 5% loss. If the total annual income for both investments was $620.

**science**

is this for your home work or something? cause it is really hard!!!!!!!

**Computer hardware**

What circumstance would be the only reason for one to toil with processor and system bus frequencies? A. Purchasing a multi core processor B. Purchasing a chip with static ram C. Overclocking a processor D. Purchasing an AMD chipset I think it's c, but I am not sure

**math**

-[2x-(5x+2)]=2+(2x+7) help me please, i need step by step so that I won't get lost

**Principles of Democracy**

Thank you.

**Principles of Democracy**

There are none. :(

**Principles of Democracy**

1) The process of amending the constitution involves both____ and ____. 2) In general, liberal ideology supports...?

**math**

4/7*7/8?

**chemistry**

an aspirin contains .324 g of aspirin. how many pounds of aspirin are in a 500 aspirin of bottle

**Driver's Ed **

The lower the speed, the less time the driver has to spot dangerous situations and take action. A) True. B) False.

**Driver's Ed**

Driver's licenses can not be suspended for more than 365 days. A) True. B) False. In 2002, two out of every three drivers under the age of 21, involved in a single vehicle crash, were killed at night. A) True. B) False.

**physics**

an object weighs 10N on earth .what is the objects weight on a planet one tenth the earths mass and one half its radius?

**Health Ethics**

sure

**Health Ethics**

are laws and regulations the problem or the solution in addressing ethical problems? what is the alternative? explain your answer in 200 words or more

**algebra**

How many jelly beans are there in a candy dish whose measurements are 3 in high, and has a radius of 2?

**Math simplify**

there was no parentheses

**Math simplify**

How Do I simplify this? a) 4√-27a^3b

**English**

Help please, I don't understand it.

**math**

1/6

**math**

2/3 * 1 1/2

**chemistry**

The temperature of an ideal gas in a 5.00 L container originally at 1.01 bar pressure and 25 °C is lowered to 220 K. Calculate the new pressure of the gas.

**physics**

A 85 kg pole-vaulter falls from rest from a height of 6.4 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.48 s after landing on the pad. (a) Calculate the athlete's velocity just before reaching the pad. m/s downward (b) Calculate the constant force exerted on t...

**US HISTORY**

The NSC-68 documentreflected the American Belief A.)that military spending would help the ecomony B.)that huge sacrifices would be needed by Americans to fight the cold war C.)in our limitless capabilities D.)that we needed help to fight the spread of communism E.)in the futil...

**US HISTORY**

During the 1950s, the Central Intelligence Agency engineered pro-American political coups in both A.)Iraq and Nicaragua B.)Libia and Costa Rica C.)Lebanon and El Salvador D.)Iran and Guatemala E.)Eqypt and Cuba

**US HISTORY**

In return for the old American destroyers, the British gave the USA A.) six air bases in Scotland and Iceland. B.) a role in developing the atomic bomb. C.)"most favored nation" status. D.)access to German military codes. E.)eight valuable naval bases.

**math**

you are looking for a safe place to put 30,000.00 for one yr. Bank A offers 2.46% interest rate continuously. Bank B offers 2.48% quarterly and Bank C offers 2.47% monthly. Find the most effective rate of each to determine which would earn you the most interest at the end of o...

**chemistry**

A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.

**statistics**

Using the average and standard devation for length variable from problem 3,find the probability that the length of 35 movies is less than 120 minutes. Assume the distribution is normally distributed. interpret your result.

**Chemistry**

A very old and tired , grey haired AP Chem instructor wanted to determine the Ka of an unlabelled monoprotic acid in his stockroom. He dissolved an unknown amount of acid in an unknown amount of water and proceeded to titrate the sample with a solution of NaOH of unknown molar...

**college chemistry**

Assuming that 9.0\% of the energy output of a 65W lightbulb is visible light and that the average wavelength of the light is 550 {\rm nm}, how many photons are emitted by the lightbulb each second?

**Math 11**

Is it possible to construct a rectangle whose length is 1cm less than twice its width, and whose area is 40cm^2? If your answer is yes, determine the dimensions of the rectangle to the nearest tenth of a centimetre. If your answer is no, explain why it is not possible. I know ...

**chemistry**

The gaseous product of a reaction is collected in a 30.0 L container at 37 degrees C. The pressure in the container is 2.5 atm and the gas has a mass of 85.0 grams. What is the molar mass of this gas? I know the correct answer is 28.8 g/mol but I need to know how to get the an...

**Math Algebra**

Here the missing Infos ;-)). The Physics of Baseball by Robert Adair - after t seconds, starting 1 sec after 35 angle, rotating with an initial backspin of 2000 revolutions per minute, and hit about 110mph is given by H(t)= -80t^2+340t-260 (in feet) a)how many seconds willpas...

**algebra**

this informations I have: The Physics of Baseball by Robert Adair - after t seconds, starting 1 sec after 35 angle, rotating with an initial backspin of 2000 revolutions per minute, and hit about 110mph is given by H(t)= -80t^2+340t-260 (in feet) a)how many seconds willpass be...

**algebra**

the distance traveled by the ball is given by D(t)=-5t^2+115t-110 (in feet) how far will the ball travel before it hits the ground?

**algebra**

H(t)= -80t2+340t-260 (in feet) How many seconds will pass before the ball hits the ground?

**6th grade math**

5ft 3 in. – 2ft 9 in. = ??

**math HELP!**

nobody has answered yet and this is the only question I need :( If angle A=30* and side b=4.0 km, how do I find side c? I know that this is a 30-60-90 triangle but I don't know how to find the hypotenuse. please help!

**math**

if angle A=30* and b=4.0 km, how do I find side c?

**Grammar**

was split.

**science**

A golfer takes two putts to sink his ball in the once he is on the green. The first putt displaces the ball 6.00 m east, and the second putt displaces it 5.40 m south. What displacement would put the ball in the hole in one putt? and how do I show this graphically?

**physics**

A girl delivering newspapers travels 3 blocks west, 4 blocks north, then 6 blocks east. What is her resultant displacement? what is the total distance that she travelled? Does anyone know a way to graph this?

**physics**

does anyone know a way to graph this? I know I'm suppose to use arrows..

**physics**

A girl delivering newspapers travels 3 blocks west, 4 blocks north, then 6 blocks east. What is her resultant displacement? what is the total distance that she travelled? and how do I graph this??

**Physics**

A hunter game in the woods keeps. Track of his movements from his car he travels 1/2 mile down a trail into the woods that leads directly north east. From there he bushwacks 3500 paces directly north before stopping for a drink. As he is putting his flask away he hears a noise...

**geometry**

907

**geometry**

907

**Calculus**

How many coefficients in the binomial series expansion of (1+x)^7 are divisible by 7?

**Chem**

Calculate the pH resulting from the addition of the following: 50mL 0.1M KOH and 50mL 0.1M HBr

**Chemistry**

How many moles of oxygen are required for the combustion of 25.5 g of magnesium?

**ACC340**

Using at least two sources in addition to the text, Write a 700- to 1,050-word paper describing how information systems are changing the various aspects of the accounting profession.

**physics**

A 10.8 kg block of metal is suspended from a scale and immersed in water, as in the figure below. The dimensions of the block are 12.0 cm 10.4 cm 10.4 cm. The 12.0 cm dimension is vertical, and the top of the block is 5.00 cm below the surface of the water. (a) What are the fo...

**physics**

Assume that if the shear stress in steel exceeds about 4.00 108 N/m2, the steel ruptures. (a) Determine the shearing force necessary to shear a steel bolt 1.40 cm in diameter. (b) Determine the shearing force necessary to punch a 1.75-cm-diameter hole in a steel plate 0.690 cm...

**Physics**

For safety in climbing, a mountaineer uses a nylon rope that is 55 m long and 0.9 cm in diameter. When supporting a 82-kg climber, the rope elongates 2.0 m. Find its Young's modulus. I got 34737.433 but that is not the right answer please help!

**algebra**

what are the classification of polynomials according to the number of terms they have.

**algebra**

IMAGINE THAT A FILM CRITIC ENJOYS COLLECTING A VCD or dvd of the best movies you have seen and reviewed. create a portfolio to show the pictures and synopsis of the best movies you have seen and reviewed. make a detailed summary of the amounts spent for the vcd and dvd in your...

**math**

meredith picked 4 times as many green apples as red apples. if she picked a total of 20 apples how many green apples did she pick?

**genetics**

In a village with 4300 people, 1 in 90 males has a condition called 5-ARD that causes men to be pseudo-hermaphroditic. What is the frequency of autosomal recessive 5-ARD allele in this village, assuming Hardy-Weinberg equilibrium?

**physics**

A particle moves in the xy plane with constant acceleration. At time zero, the particle is at x = 9 m, y =6 m, and has velocity vo =(4.5 m/s)i + (−4 m/s)j. The acceleration is given by a = (6 m/s2)i + (1 m/s2)j. What is the magnitude of the displacement from the origin (...

**physics**

A sky diver of mass 68 kg jumps from a slowly moving aircraft and eventually reaches her terminal velocity 46m/s Now consider the same sky diver jumping out of a faster airplane. At some point before she reaches her terminal velocity, she has velocity v2 of magnitude 46.5 m/s ...

**statistics**

Suppose that a random variable, X, follows a Normal distribution. Specifically, X~N(10, 4). What is the value for the standard deviation

**statistics**

Suppose that a random variable, X, follows a Normal distribution. Specifically, X~N(10, 4). What is the value for the standard deviation

**Math**

I can't seem to get the right answer for factoring 15x^3 + 25x^2 - 60x

**math**

If 6d-3d+2d=35 what does d=

**english**

What was Ferre's purpose in "The Youngest Doll" and did the ending help her achieve the purpose?

**writing skills**

knowing proper grammer

**algebra**

if an investor invest a total of $1900.00 and one earned 4% and the other 2% and his total profit is $66, how much did he invest in both funds?

**Chemistry**

How many Cal need to be removed to condense 500. g of steam at 150.0 Celsius to water at 37.0 Celsius?

**Algebra**

4=7+x+6x

**physics**

285. I answered the question correctly on a Topic Test Review on my E2020 physics class. :D hope it helps!

**Math**

Manny loves to eat Cajun pizza. Each square inch of pizza is 8 calories. He orders a slice of pizza from a pizza with a diameter of 16 inches that is cut with a central angle of 20 degrees. How many calories does he eat?

**Chemistry**

Ohhh.. my mistake I understand now. thanks!

**Chemistry**

Hello Dr. Bob, This was the equation: 2N2O(g) ---> 2N2(g) + O2

**Chemistry**

Which of the following reactions are spontaneous (favorable)? A] 2Mg(s) + O2(g) -> 2MgO(s) Delta G = -1137 kJ/mol .. B] NH3(g) + HCl(g) -> NH4Cl(s) Delta G = -91.1 kJ/mol ... C] AgCl(s) -> Ag+(aq) + Cl-(aq) Delta G = 55.6 kJ/mol .. D] 2H2(g) + O2(g) -> 2H2O(g) Delt...

**business**

Im on Lesson 2 Planning and leadership and im stuck on num 6 Can anyone help me. Which one of the following leadership stlyes could best charactertized by the statememt "let george do it"?

**Chemistry**

ohh i'm sorry i understand now thank you Dr. Bob!

**Chemistry**

Hi Dr. Bob. I'm coming up with outrageous numbers for when I try to use atm's with my Kp value.. please look! Kp = PPCl5/PPCl3PCl2 = (0.2855)/(0.01737)(0.01737) = 946.3 PCl3 : 0.01737-946.3 = -946.28 atm?! Cl2 : 0.04316 - 946.3 = -946.26 atm o.o PCl5 : 0.2855 + 2(946.3...

**Chemistry**

Hi lol Is this correct?: Kp = PPCl5/(PPCl3)(PCl2) = 217.0 torr/(13.2 torr)(13.2 torr) = 1.245 x/(263 torr - x) = 1.245 x = 327.435 - 1.245x 2.245x = 327.435 x = 145.85 torr = PPCl5 263.0 total torr - 145.85 PCl5 torr = 117.15 torr - 13.2 torr = 103.95 torr for Cl2 13.2 torr fo...

**Chemistry**

An equilibrium mixture of PCl5(g), PCl3(g), and Cl2(g) has a partial pressure of 217.0 torr, 13.2 torr, and 13.2 torr, respectively. A quantity of Cl2(g) is injected into the mixture, and the total pressure jumps to 263.0 torr. The appropriate chemical equation is PCl3(g) + Cl...

**physics**

6) A sub has a volume of 20 m3 and a density of 1500 kg/m3. It sinks to a depth of 40 meters. The density of sea water is 1025 kg/m3. a. What is the pressure on the sub at this depth? b. The sub has a window with a diameter of 30 cm. What is the net force on the window of the ...

**French**

It's okay! Thank you I'm sure someone else can help too. :)

**French**

I think I have to use "peur" instead of "craindre" though because the way it is use in the text? I was looking back and it says "peur" must be used with the subjontif. So, is "J'ai peur que je ne trouve pas un travail" incorrect? Sho...

**French**

How do I talk about fear in french? The activity is to introduce ourselves (what we like, don't like, find interesting, want to do in life) and then it says: "si vous avez peur de quelque chose." My understanding is that it is asking about things we are afraid of...

**Math**

here:) boy's flag pole's height: 5ft 15ft shadow length: x 8ft so you would just multiply 8 ft x 5 ft=40 then divide by 15 feet and get 2.6666 (repeating) so you could just round or whatever but then that would be your answer!

**math**

260

**math**

A car rents for $40 per day plus .20 cents per mile. your budget is $92 daily.What mileage will allow you to stay in budget?

**statistics**

A standard IQ test has a mean of 98 and a standard deviation of 16. We want to be 90% certain that we are within 8 IQ points of the true mean. Determine the sample size.