Saturday

November 22, 2014

November 22, 2014

Total # Posts: 74,490

**Math**

23 + -23 + 8b = 4.2 + -23 Combine like terms: 23 + -23 = 0 0 + 8b = 4.2 + -23 8b = 4.2 + -23 Combine like terms: 4.2 + -23 = -18.8 8b = -18.8 Divide each side by '8'. b = -2.35 Simplifying b = -2.35
*November 3, 2014*

**biology**

All cells need to make energy to perform basic functions. Animal cells make energy by breaking down sugars etc. while plant cells use photosynthesis. Some bacteria can do photosynthesis (cyanobacteria) and other bacteria obtain energy from the electron transport enzymes on ...
*November 3, 2014*

**Physics**

A 5.9 kg block initially at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 12.1 N. Find the speed of the block after it has moved 2.6 m.
*November 3, 2014*

**rolling motion **

The average car today has a mass of 1100 kg, and when accelerating from rest, covers 0.25 miles in 15 seconds. Each rim and tire together has a diameter of 46 cm and a mass of 9.1kg. If we agree the rim and tire have the shape of a solid disk that rotates through its geometric...
*November 3, 2014*

**poetry **

I'm having trouble writing a persona poem. Can someone explain it to me? can i get an example of persona poem? thanks:)
*November 3, 2014*

**physics **

The average car today has a mass of 1100 kg, and when accelerating from rest, covers 0.25 miles in 15 seconds. Each rim and tire together has a diameter of 46 cm and a mass of 9.1kg. If we agree the rim and tire have the shape of a solid disk that rotates through its geometric...
*November 3, 2014*

**Physics **

A moving object has a kinetic energy of 182 J and a momentum with magnitude of 27.6 kg·m/s. (a) Determine the mass of the object. kg (b) Determine the speed of the object. m/s
*November 3, 2014*

**Physics**

A 73.5 kg ice skater moving to the right with a velocity of 2.97 m/s throws a 0.21 kg snowball to the right with a velocity of 29.3 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and...
*November 3, 2014*

**math**

A 20-year-old student decided to set aside $100 on his 21st birthday for investment. Each subsequent year through his 55th birthday, he plans to increase the investment on a $100 arithmetic gradient. He will not set aside additional money after his 55th birth- day. If the ...
*November 3, 2014*

**social studies**

can you just please tell me the answer>?
*November 3, 2014*

**social studies**

which section does it say that? i cant find it?
*November 3, 2014*

**social studies**

Describe some positive and negative events of the trustee period, and provide your own evaluation of the rule of the trustees as either generally a success or a failure. i have searched online i cant find anything can someone please help out
*November 3, 2014*

**physics**

Which parameter of a projectile depends on the horizontal as well as the vertical component of velocity of projection?
*November 3, 2014*

**Language Arts 8A**

#4 is d i think
*November 3, 2014*

**physics **

The average car today has a mass of 1100 kg, and when accelerating from rest, covers 0.25 miles in 15 seconds. Each rim and tire together has a diameter of 46 cm and a mass of 9.1kg. If we agree the rim and tire have the shape of a solid disk that rotates through its geometric...
*November 3, 2014*

**Social Studies**

The Greeks and Turks who share the island have been unable to truly unite as a single nation. Instead, Greek Cypriots administrate much of the island, while a small portion in the north is run by Turkish Cypriots. What challenges must these groups overcome in order to become ...
*November 3, 2014*

**science**

help me with my question
*November 3, 2014*

**physical science check asap**

check these answers 4.d 5.a 6.a 7.c 8.a 9.a 12.c 17.b
*November 3, 2014*

**physical science check asap**

k can you give me hints at least for thsoe>?
*November 3, 2014*

**physical science check asap**

can you please tell me the answers to those i dont get those
*November 3, 2014*

**physical science check asap**

check my answers : 1.c 2.d 3.c 4.c 5.c 6.c 7.a 8.d 9.b 10.d 12.a 13.d 14.c 15.c 16.d 17.d 18.d 19.a
*November 3, 2014*

**physical science check asap **

1. Tommy performed an experiment to test the solubility of sodium chloride in water. After he completed his experiment, he discovered that he had a few unused grams of NaCl leftover in a beaker. What should he do with the excess NaCl? A. Pour the excess back into the original ...
*November 3, 2014*

**Calculus**

bobpursley can u check my work?
*November 3, 2014*

**physical science**

can you check these? 1.c 2.d 3.c 4.c 5.c 6.c 7.a 8.d 9.b 10.d 12.a 13.d 14.c 15.c 16.d 17.d 18.d 19.a
*November 3, 2014*

**physical science**

do you check answers?
*November 3, 2014*

**physical science**

can you just provide the answers?
*November 3, 2014*

**physical science**

1. Tommy performed an experiment to test the solubility of sodium chloride in water. After he completed his experiment, he discovered that he had a few unused grams of NaCl leftover in a beaker. What should he do with the excess NaCl? A. Pour the excess back into the original...
*November 3, 2014*

**physics **

A 750-N physics student carries a 4.0 meter board, uniform in shape, and 190 newtons in weight to our swimming pool. The student then places the board on the deck and next to the pool in such a way so 1.5 meters of the board extends out over the edge of the pool. How far, in ...
*November 3, 2014*

**history**

i did i cant find it
*November 3, 2014*

**history**

can you please give me the answer i dont get it?
*November 3, 2014*

**history**

Describe some positive and negative events of the trustee period, and provide your own evaluation of the rule of the trustees as either generally a success or a failure.
*November 3, 2014*

**A mathematics**

Text book answers doesnt match my answers. What should i do?
*November 3, 2014*

**A mathematics**

Thank you so much. I really appreciate it.
*November 3, 2014*

**Physics **

mass of 2 kg is released from rest at the top of the inclined plane shown below. at bottom speed is 5 m/s how much work was done by friction between incline and mass
*November 3, 2014*

**Physics **

3.2 kg block is given an initial velocity of 12 m/s across horizontal surface. after travels 8 m speed is 2.4 m/s. determine coefficient of friction bewern block and surface and how far it travels before coming to rest
*November 3, 2014*

**Pre calculus**

Find the rectangular equation for the given polar coordinates: R=(7/(5+4sin theta))
*November 3, 2014*

**statistics**

A random sample of 84 shoppers were interviewed and 51 said they prefer to shop alone rather than with someone else. Let p represent the proportion of all shoppers at this mall who would prefer to shop alone. Find a point estimate (p hat) for p.
*November 2, 2014*

**Statistics**

At a cell phone battery plant, 5% of cell phone batteries produced are defective. A quality control engineer randomly collects a sample of 50 batteries from a large shipment from this plant and inspects them from defects. Find the probability that A. None of the batteries are ...
*November 2, 2014*

**history**

The expansion of cotton farming to the West necessitated the use of greater numbers of slaves for its cultivation. True, right?
*November 2, 2014*

**HISTORY**

Brigham Young B. was killed by a lynch mob in Illinois in 1844 C.led slave revolt in Virginia in 1831 D.led the Mormons to their settlement in Utah E.wrote the golden tablets which became the basis for the Mormon faith I'd say D An additional factor isolating many Irish ...
*November 2, 2014*

**chemistry**

determine the percent yield when 5.00g benzene burns in oxygen gas to form 1.50g of carbon dioxide and water vapor.
*November 2, 2014*

**physics**

find the mass of a ball on a roof 30 meters high, if the ball's gravitational energy is 58.8 joules.
*November 2, 2014*

**Math**

The area of a rectangle pool was 120 square meters. If the long side is 7 meters plus a number and the width is 6 meters. What is the value of the variable? I couldn't make a equation for this; I tried and I got 7+x+6 = 120 and that doesn't seem right.
*November 2, 2014*

**chemistry - instrumentation**

Thanks I tried searching myself but I guess I didn't word it the correct way. Wasn't finding anything so I came here.
*November 2, 2014*

**chemistry - instrumentation**

What can account for differences in the calculated value of a drug concentration in a sample as determined by standard curve method and response factor method?
*November 2, 2014*

**physics **

The average car today has a mass of 1100 kg, and when accelerating from rest, covers 0.25 miles in 15 seconds. Each rim and tire together has a diameter of 45.7 cm and a mass of 9.1kg. How many revolutions did one of the front tires (assuming only the back tires spun upon ...
*November 2, 2014*

**science**

This year for my science fair project I will be testing to see if music affects a person's blood pressure. I will have a participant get relaxed (for 5 minutes). After he/she is relaxed, I will take his/her blood pressure with a digital sphygmomanometer (instrument used to...
*November 2, 2014*

**history**

It doesn't state the word clergymen specifically but mentions that Charles G. Finney (a religious man) became the professor of theology and president at the new Oberlin College in Ohio.
*November 2, 2014*

**history**

I don't have any choices, it's a fill in the blank but my book does not mention who found the colleges, only which colleges where found. I looked online and it says many women colleges arose during the 19th century, involving many women educators.
*November 2, 2014*

**history**

Through the mid-nineteenth century most colleges and universities were founded by? I would say women.
*November 2, 2014*

**HISTORY**

Many Americans settled in Texas illegally, in spite of the fact that it was claimed by the nation of (Mexico.) The revivals of the Second great Awakening were especially prevalent A. in England B. in New England C. in New York City D. in Florida E. on the Western frontier F. ...
*November 2, 2014*

**history**

Check my answers please? The Second Great Awakening was a conservative reaction to deism, the expanding frontier, & the industrial revolution. True, it was definitely a reaction to the IR & deism The romantic reaction to rationalism & the industrial revolution was seen in A. ...
*November 2, 2014*

**Algebra 1B**

Yes, thanks.
*November 2, 2014*

**Algebra 1B**

Thank you but what does 'surd' mean?
*November 2, 2014*

**Algebra 1B**

Can you give me the steps to the answer? How many real number solutions are there to the equation 0 = –3x² + x – 4? 0 1 2 3
*November 2, 2014*

**Need help by tonite Finance**

15. Bond ratings and prices A corporate bond with an 8.5 percent coupon has 10 years left to maturity. It has had a credit rating of A and a yield to maturity of 10 percent. The firm has recently gotten into some trouble and the rating agency is downgrading the bonds to BBB. ...
*November 2, 2014*

**Need help by tonite Finance**

4. Liquidity Premium Hypothesis Suppose we observe the following rates: 1R1 = 8 percent, 1R2 = 10 percent, and E(2r1) = 8 percent. If the liquidity premium theory of the term structure of interest rates holds, what is the liquidity premium for year 2, L2?
*November 2, 2014*

**Need help by tonite Finance**

3. Unbiased Expectations Theory One-year Treasury bills currently earn 5.50 percent. You expect that one year from now, one-year Treasury bill rates will increase to 5.75 percent. If the unbiased expectations theory is correct, what should the current rate be on two-year ...
*November 2, 2014*

**Need help by tonite FINANCE**

2. Interest rates A two-year Treasury security currently earns 5.25 percent. Over the next two years, the real interest rate is expected to be 3.00 percent per year and the inflation premium is expected to be 2.00 percent per year. What is the maturity risk premium on the two-...
*November 2, 2014*

**College chemistry**

How much heat is transferred when freezing 520 grams of water at 0 degrees Celsius?
*November 2, 2014*

**Chemistry**

How do I find the number of energy levels in a positive and a negative ion? And also how do I find the number of electrons in a ion and a atom?
*November 2, 2014*

**physics**

During burnouts at the local drag strip, a dragster’s 45.0kg tire rotates at a speed of 35.0m/s. If the tire has a radius of 0.500m what is the centripetal force acting on the center of the tire rim during this burnout?
*November 2, 2014*

**chemistry**

Given the following reactions Fe2O3(s) + 3CO (s) → 2Fe (s) + 3CO2(g)ΔH =-28.0 kJ 3Fe (s) + 4CO2(s) → 4CO (g) +Fe3O4(s) ΔH = +12.5 kJ the enthalpy of the reaction of Fe2O3 with CO 3Fe2O3(s) + CO (g) → CO2(g) + 2Fe3O4(s) is __________ kJ
*November 2, 2014*

**chemistry**

The value of ΔH° for the reaction below is - 6535 kJ. __________ kJ of heat are released in the combustion of 16.0 g of C6H6(l)? 2C6H6(l) + 15O2(g) → 12CO2(g) + 6H2O (l)
*November 2, 2014*

**math**

Four times the sum of a number and 15 is at least 120. Let x represent the number. Find all possible values for x. A. x ≥ 26 B. x ≥ –15 C. x ≥ 15 D. x ≥ –26
*November 2, 2014*

**pol 201**

The Virginia Plan proposed all of the following except
*November 2, 2014*

**Algebra**

Jess uses her scanner to scan pages at the rate of $.09 per page. She decides to rent a scanner for $70 a year. The cost of scanning using the rented scanner is $.02 per page. Please help me write an inequality that can be used to calculate the number of pages that Jess should...
*November 2, 2014*

**calculus**

integration of x^2/(x+3)sq.root of 3x+4 w.r.t. x
*November 2, 2014*

**Calculus**

An ant is walking along the curve x^2+xy+y^2=19. If the ant is moving to the right at the rate of 3 centimeters/second, how fast is the ant moving up or down when the ant reaches the point (2,3)? Specify direction.
*November 2, 2014*

**Calculus**

A rectangle is 2 feet by 15 inches. Its length is decreasing by 3 inches/minute and its width is increasing at 4 inches/minute. How fast is the a) perimeter changing b) area changing
*November 2, 2014*

**chemistry**

The value of ΔH° for the reaction below is -1107 kJ: 2Ba (s) + O2(g) → 2BaO (s) How many kJ of heat are released when 5.75 g of Ba (s) reacts completely with oxygen to form BaO (s)?
*November 1, 2014*

**inequality**

Jim uses office scanner to scan pages at rate of $.09 per page. He decides to rent a scanner for$70 a year. The cost of scanning using the rental is $.02 per page. Need inequality that can be used to calculate the number of pages that he should scan in a year so that the ...
*November 1, 2014*

**chemistry**

magnesium metal (1.00 mol) and a volume of aqueous hydrochloric acid that contains .500 mol of HCL are combined and react to completion. how many liters of hydrogen gas, measured at STP, are produced? Mg(s) + 2HCL(aq) -> MgCl2(aq) + H2(g)
*November 1, 2014*

**psychology**

Edwina is worried, anxious, and sure that something terrible is going to happen to her. She’s not sure what it would be, but she “just knows.” The feeling occurs on almost a daily basis and frequently keeps her awake at night. In addition, for the last few weeks...
*November 1, 2014*

**HISTORY**

In the mid-nineteenth century new waves of immigrants came to the United States, most of them from ___ and ___. Northern & Western Europe?
*November 1, 2014*

**Math**

Jane grows several varieties of plants in a rectangular-shaped garden. She uses fencing to divide the garden into 16 squares that are each 1 m by 1 m. She also puts fencing around the perimeter of the garden. What should the dimensions of the garden be so that Jane uses the ...
*November 1, 2014*

**history**

Check my answers? True/False South Carolina was allowed by Congress to nullify federal tariffs which hurt their economy. False, the Senate came up with a Compromise where federal tariffs would be reduced for SC. One of the most dependable & profitable sources of income for the...
*November 1, 2014*

**AP Calc. AB**

There is no inverse for this function.
*November 1, 2014*

**Math**

There h horizontal lines and v vertical lines drawn in a plane. There are r ways to choose four lines such that a rectangular region is enclosed. Given that r is divisible by 1001. Find the minimum value of h+v. I am really not sure where to start.
*November 1, 2014*

**Math**

Can you turn this into a calculus max/min problem?
*November 1, 2014*

**Math**

Jane grows several varieties of plants in a rectangular-shaped garden. She uses fencing to divide the garden into 16 squares that are each 1 m by 1 m. She also puts fencing around the perimeter of the garden. What should the dimensions of the garden be so that Jane uses the ...
*November 1, 2014*

**College Intermediate Algebra**

(x-3)^2 + [10x-30] +24
*November 1, 2014*

**college algebra**

(x-3)^2+10x-30+24
*November 1, 2014*

**algebra**

factor (x-3)^2 +10(x-30)+24
*November 1, 2014*

**Intermediate Algebra**

factor (x-3)^2 +10(x-30)+24
*November 1, 2014*

**physics**

A dart is thrown horizontally toward X at 30 m/s as shown. It hits Y 0.29 s later. The distance XY in centimeters is:
*November 1, 2014*

**Calculus**

The blood alcohol concentration after a drink has been consumed can be modelled by c(t)=(0.02t)e^(−0.05t) where t is the time in minutes elapsed after the consumption of the drink and c(t) is the concentration in mg/mL at t. At what time in the first hour after consuming...
*November 1, 2014*

**MATH: Need help please**

i got my L(x) = x-1 but for some reason i can't seem to get the second part of the answer with ln 1.12 approximation
*November 1, 2014*

**MATH: Need help please **

Find the linear approximation of f(x)=\ln x at x=1 and use it to estimate ln 1.12. L(x)= . ln 1.12 approx
*November 1, 2014*

**Math**

If fencing cost $7 per foot find the total cost of fencing a rectangular garden 36ft by by 12ft
*November 1, 2014*

**Math**

A plane leaves an airport X, 20.6degrees east and 36.8 north degrees and flies due south along the same longitude for 8 hours at the rate of 1000km/h to another airport Y, 20.6degrees east and tita degree south. The plane then flies west to another airport Z for 8hours at the ...
*November 1, 2014*

**Physic**

Wo = 0.5rev/s Wf = 0.25rev/s t = 11s Revolution = ? a) Acceleration = 0.5rev/s / 11s Acceleration = -0.045rad/s² Θ = Wot + 1/2(-a)t Θ = 0.5rev/s(11s) - 1/2(0.045rad/s²)(11²) Θ = 2.75rev <-- Answer b) Average speed = (0.5rev/s + 0.25rev/s) / 2 ...
*November 1, 2014*

**Physic**

A ceiling fan is rotating at 0.50 rev/s. When turned off, it slows uniformly to a stop in 11 s. (a) How many revolutions does it make in this time? (b) Using the result from part (a), find the number of revolutions the fan must make for its speed to decrease from 0.50 rev/s to...
*November 1, 2014*

**physics**

The car stationary in front of a red traffic light. As the light turns green , a truck goes past at a constant velocity of 1.5 m/s. At the same moment , the car begins to accelerate at 1.25 m/s 2 . When it reaches 2.5 m/s the car continues at this velocity . When does the car ...
*October 31, 2014*

**Math**

A “gazing ball” is a spherical garden ornament with a mirrored surface that reflects its surroundings. The surface area of the ball is approximately 314 square inches. What is its volume to the nearest cubic inch?
*October 31, 2014*

**physics**

25 s / 0.38 km
*October 31, 2014*

**physics**

The drawing shows two transverse waves traveling on two strings. The linear density of each string is 0.0483 kg/m, and the tension is provided by a 15.0-N block that is hanging from the string. Determine the speed of the wave in part (a) and part (b) of the drawing.
*October 31, 2014*

**Pre-Calc/Trig...**

oh okai thanks!!!
*October 31, 2014*

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