Sunday

December 28, 2014

December 28, 2014

Total # Posts: 269

**Math**

Find the exact value: 1.) cos^-1(sin(pi/2)) 2.) arccos(cos(7pi/2))
*December 8, 2014*

**Math**

Find the exact value: 1.) cos^-1(sin(pi/2)) 2.) arccos(cos(7pi/2))
*December 7, 2014*

**Math Question**

To solve this problem, use the Pythagorean Theorem to find the third side. Next, find the other five trigonometric functions of theta (sin, tan, csc, sec and cot). Cos=5/7
*December 2, 2014*

**Physics Homework Help**

1.) Auston’s racecar has a speed of 80 m/s when Auston releases a drag parachute. If the parachute causes a deceleration of -4 m/s2, how far will the car travel before it stops? 2.) Jordan throws a golfball straight up from the top of a building 50 meters high. The ...
*October 10, 2014*

**Delete**

Is it possible to have this question removed? Thanks so much! :) Subject: Pre-Calc Date: Saturday October 4, 2014 Time: 10:27am
*October 5, 2014*

**Pre-Calc**

The number of pounds of apples a cannery can produce and the processing cost are P(h) = 375h and C(n) = 0.35n + 1000 where P(h) is the number of pounds of apples that can be processed in h hours and C(n) is the cost of processing n pounds of apples. Use composition of ...
*October 4, 2014*

**Math**

The depth d in feet of the water in a bay at is given by d(t) = 3/2 sin (5πt/31) + 23 where t is time. Graph the depth of the water as a function of time. What is the maximum depth of the water to the nearest tenth of a foot? (Enter only the number.)
*October 2, 2014*

**Math**

George has coins in his pocket. He has 7 more quarters than he has dimes. How many dimes does he have?
*September 8, 2014*

**earth science**

that's right
*May 12, 2014*

**Cyber Community Citizenship**

just took this test answers are a a d
*March 6, 2014*

**science**

What is the average speed of a satellite given the following information. 1) The earth's radius = 6000 km 2) The satellite is 900 km from the earth's surface 3) The satellite's orbital period: 2 hours 4) Circumference = 2pr (p = 3.14) A) 6 km/s B) 10 km/s C) 5 km/...
*February 10, 2014*

**world civilizations**

Regarding trade and social change in Africa, which statement is true? A. The West Africa Squadron succeeded in obstructing about 30 percent of the African slave trade. B. The most important development in West Arica before European conquest was reliance on exporting salt. C. ...
*January 15, 2014*

**World Civilizations**

Under the Tokugawa peace, daimyo A. were prohibited from coining money. B. were heavily engaged in foreign trade. C. social status increased. D. castle building was encouraged. I thought the best answer is B.
*January 15, 2014*

**World civilizations**

Thank You
*January 15, 2014*

**World civilizations**

All of the following were factors favoring British industrialization, except A. increased agricultural production. B. rising urbanization and higher wages. C. a decline in domestic demand for manufactured goods. D. immediate or canal access to ocean ports. I said C. which I ...
*January 15, 2014*

**world civilizations**

C B A D A C D B B C A D A B C C A D B B
*January 15, 2014*

**world civilizations**

In my world civilizations book.
*January 15, 2014*

**world civilizations**

i need help finding answers please :)
*January 15, 2014*

**world civilizations**

i havent made any selections yet because im having a hard time finding the answers.
*January 15, 2014*

**world civilizations**

1. All of the following were factors favoring British industrialization, except A. increased agricultural production. B. rising urbanization and higher wages. C. a decline in domestic demand for manufactured goods. D. immediate or canal access to ocean ports. 2. Under the ...
*January 15, 2014*

**world civilizations**

During the Industrial Revolution, in all countries, the impact of the railroads A. increased the demand for unskilled labor. B. caused domestic markets to be replaced by export markets. C. decreased the demand for unskilled labor. D. caused domestic labor to be replaced with ...
*January 15, 2014*

**please help me!! with this science!!!!!**

1 B biosphere 2 B The sphere that has three main parts: a metal core, a solid middle layer, and rocky outer layer 3 c in the atmosphere and in the hydrosphere 4 C mountains are built up 5 B forces that wear down, or destroy, landmasses I gto 100% on this test so here are the ...
*January 7, 2014*

**Business 101**

Did you ever get the answers?
*November 17, 2013*

**Physics**

A hockey player's arm and stick form a 1.6 m rigid segment. If the angular speed of the player's arm/stick is 1.2 rad/s, determine the resultant velocity of a motionless puck that is hit struck on if: a) the hockey player is stationary during the swing b) the hockey ...
*November 7, 2013*

**Trigonometry**

Use a calculator too find the value of ø if secø3.125
*October 17, 2013*

**math **

combining like terms 1.) 10x+6y-5x and 2.) 9x^2+10+4x^2+7
*August 10, 2013*

**math**

a woman puts $580 into a savings account for one year. the rate of interest on the account was 6 1/2%. How much interest for the year in dollars and cents?
*August 10, 2013*

**Physic 30**

INFORMATION: Kathy and Bill collided at an intersection. The police learned the mass of the truck is 3200 kg and the mass of the car is 2800 kg. Based on the length of the skid marks at the scene and the mass of the vehicles, police estimate that the combined mass was moving ...
*April 3, 2013*

**Calc**

nadia is pulling a tarp along level ground with a force of 25 pounds directed along the tarp. If the tarp makes an angle of 50 degrees with the ground, find the horizontal component of the force.
*March 11, 2013*

**Calc**

nadia is pulling a tarp along level ground with a force of 25 pounds directed along the tarp. If the tarp makes an angle of 50 degrees with the ground, find the horizontal component of the force.
*March 11, 2013*

**math**

Anita has two sisters and three brothers. The mean of all their ages is 6 years. Wht is the mean of their agesin 10 years and 20 years?
*February 25, 2013*

**MATH**

a b c or d
*February 15, 2013*

**Calculus**

Find the derivative of the function using the definition of a derivative. F(x)=squareroot(1-3x) Please show work for understanding, thank you! :)
*February 14, 2013*

**Calculus**

Find the instantaneous rate of change of V with respect to r when r=100 V(r)=.2r^2-20r+600 using limit definition. Please show work for understanding, thank you :)
*February 14, 2013*

**Calculus**

Use the intermediate value therom to show that there is a root of the given equation in the specified interval. x^5-7=2(25-x); (2,3) Please explain for understanding and show work, Thank you in advance :)
*February 8, 2013*

**Calculus**

correction 4x^2-16
*February 8, 2013*

**Calculus**

Find the horizontal asymptotes of the curve. y=-6x/squareroot (4x^2-160
*February 8, 2013*

**Spanish**

mis hermanos then you would break it down to mi hermana se llama blah y mi hermano se llama blah
*February 7, 2013*

**science**

Im here to say that Caroline is right and that she helped me with this question!!!!
*February 6, 2013*

**physics**

A 47.0-g Super Ball traveling at 26.5 m/s bounces off a brick wall and rebounds at 20.5 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.10 ms, what is the magnitude of the average acceleration of the ball during this time interval?
*January 25, 2013*

**math ??**

what is the 43rd term of -124-122-120
*January 16, 2013*

**math**

1 AND 1/2
*January 16, 2013*

**Algebra 2. Please help ASAP**

The pH of a liquid is a measure of how acidic or basic it is. The concentration of hydrogen ions in a liquid is labeled [H+]. Use the formula pH = –log[H+] to find the pH level, to the nearest tenth, of a liquid with [H+] about 5.4 x 10–14. A. 14.7 B. 13.3 C. 14.0 D...
*December 14, 2012*

**Algebra 2**

The pH of a liquid is a measure of how acidic or basic it is. The concentration of hydrogen ions in a liquid is labeled [H+]. Use the formula pH = –log[H+] to find the pH level, to the nearest tenth, of a liquid with [H+] about 5.4 x 10–14. A. 14.7 B. 13.3 C. 14.0 D...
*December 14, 2012*

**Algebra 2**

Okay thank you.
*December 14, 2012*

**Algebra 2**

Suppose you invest $1600 at an annual interest rate of 7.9% compounded continuously. How much will you have in the account after 10 years? A. $35,254.34 B. $3,525.43 C. $3,435.91 D. $17,315.27
*December 14, 2012*

**Algebra 2**

Suppose you invest $1600 at an annual interest rate of 7.9% compounded continuously. How much will you have in the account after 10 years? A. $35,254.34 B. $3,525.43 C. $3,435.91 D. $17,315.27
*December 14, 2012*

**Physics**

the net external force of the propeller of a 4.0 kg model airplane is 9.5 N forward. What is the acceleration of the airplane? Answer in units of m/s^2
*December 13, 2012*

**Physics**

thank you.
*December 4, 2012*

**Physics**

A person exerts a force of 12.0 N on the end of a door 65.0 cm wide. What is the magnitude of the torque (in newton-meters) if the force is exerted perpendicularly to the door?
*December 4, 2012*

**Art Please check answers**

yep they were mostly wrong. I checked with my study guide from my art book. WAYY wrong.
*December 3, 2012*

**Pre-Calc **

The cable in the center portion of a bridge is supported by five pillars to form a parabola. The center support is 10 ft high, the tallest supports are 210 feet high, and the distance between the two tallest supports is 400 ft. Find the height of the two supports equally ...
*December 3, 2012*

**Pre-Calc**

OMG thanks you so much!
*December 3, 2012*

**Pre-Calc**

I have to solve these using matrices by hand. Can someone please help me? 2x-3y-2z=4 (1/4)x-(2/5)y+(3/4)z=(-1/3) -2x+1.3y-3z=5 Thank you so much! :)
*December 3, 2012*

**Pre-Calculus**

I am supposed to solve these conics, can you please help :)I am supposed to name the center and the vertices. 1. 3y^2-2x^2+12x+24+24y=0 2.-16x^2-4y^2=48x-20y+57
*December 3, 2012*

**chem**

.219 M Find the molar weight, divide the grams by the molar weight= moles Molarity=moles/liter
*December 3, 2012*

**chem**

Constant equilibrium equation. - now at least you can type it into google :)
*December 3, 2012*

**Physics **

A man pulls a 50 kg box with an acceleration of 2m/s^2 across the floor. He applies a 200 N force at an angle of 30 degrees what is the coefficient of the kinetic friction?
*December 2, 2012*

**Math**

Krista lives 1/2 mile from school. Desiree lives 872 yards away from the school. Who lives closer? Explain.
*November 3, 2012*

**english 3 A**

The sot-weed factor
*October 18, 2012*

**Physics **

A car accelerates for 5 seconds at 2.1 m/s^2. If the car initially had a speed of 10 m/s, what is the new speed?
*October 7, 2012*

**math**

Get the number right. *None of the digits repeat. *It is between 20,000 and 77,777 *The digit in the thousands place is 3 times the digit in the ten thousands place *The ones digit is a prime number *The hundred digit is half the sum of the ones, thousands, and tan thousands ...
*September 26, 2012*

**English 3**

The answer to number 3 is "DO"
*September 18, 2012*

**chemistry**

nevermind
*August 28, 2012*

**chemistry**

what does the R stand for again? the grams?
*August 28, 2012*

**chemistry**

Calculate the Molecular Weight (MW) of a hydrocarbon as if 0.5813 g of this gas completely fills a 250.0 mL flask at a temperature of 24.4 C and pressure of 742.6 mmHg. Show all work and assume ideal behavior.
*August 28, 2012*

**math**

160
*August 21, 2012*

**Social studies**

Because they would be closer to God
*June 5, 2012*

**Social Sudies**

I can't find the answer to my crossword puzzle! Here it is: A nation's factories, machines, etc. are it's____________capital. I know it's an 8 letter word, but that's all!
*April 11, 2012*

**chemistry**

ammonium nitrate decomposes to N2O and water at temperatures between 250 C and 300 C. Write a balanced chemical reaction describing the decomposition of ammonium nitrate, and calculate the standard heat of reaction using the appropriate enthalpies of formation. Please include ...
*March 28, 2012*

**chemistry**

If 15.0 mL of a 1.5M HCl solution at 22.5 degrees C is mixed with 25.0mL of a 1.5M NaOH solution at 21.5 degrees C that is in a calorimeter, and the final mixed solution temperature ends up at 28.5 degrees C, what is the balanced equation for this reaction?
*March 26, 2012*

**math**

For #s 4-7 #4) is Increase 35 by 40% 35 * 1.4 = 49 #5)Increase 125 by 8% 125 * 0.08 = 10 #6) Decrease 8 by 75% 8 * 0.75 = 6 #7) Decrease 135 by 22% 135 * 0.22 = 29.7 ARE THESE CORRECT YOU HAD TO FIND THE NEW AMOUNT.
*February 27, 2012*

**prealgebra**

For #s 4-7 #4) is Increase 35 by 40% 35 * 1.4 = 49 #5)Increase 125 by 8% 125 * 0.08 = 10 #6) Decrease 8 by 75% 8 * 0.75 = 6 #7) Decrease 135 by 22% 135 * 0.22 = 29.7 ARE THESE CORRECT YOU HAD TO FIND THE NEW AMOUNT.
*February 27, 2012*

**algebra**

A sign in a local department store says, “All Items 30% off Marked Price.” Form a function and then use it to determine how much one has to pay for each of the following marked items: a $65 pair of shoes, a $48 pair of slacks, and a $15.50 belt.
*February 27, 2012*

**Math/Conics**

Find the center, vertices, and foci of the ellipse with the following equation: x^2/9+y^2/16=1
*February 23, 2012*

**Math/Conics**

Find the vertex and focus of the parabola with the following equation: y = x2 + 6x + 5
*February 23, 2012*

**algebra**

Tina has $600 in her bank account when she starts withdrawing $50 a week. What is the slope in this problem?
*February 20, 2012*

**geometry**

HELPP!!
*February 17, 2012*

**geometry**

Determine how many triangles with the following measurements can be formed: ÚA = 53‹, a = 7, b = 10.
*February 17, 2012*

**geometry**

A tree is growing at an angle out of the ground, 15°17' from vertical. Standing 10 ft away from the base, the angle to the top of the tree is 25°17'. What is the height of the tree?
*February 17, 2012*

**geometry**

In a triangle, find the value of a if ÚA = 75‹15', b = 4, and c = 9.
*February 17, 2012*

**geometry**

A farmer has a triangular field with sides that measure 120 yards, 170 yards, and 220 yards. Find the area of the field
*February 16, 2012*

**geometry**

In a triangle, find the value of a if ÚA = 75‹15', b = 4, and c = 9.
*February 16, 2012*

**geometry**

Determine how many triangles with the following measurements can be formed: ÚA = 67.5‹, a = 43, b = 59.
*February 16, 2012*

**geometry**

Thank you so much!
*February 16, 2012*

**geometry**

To find the distance from the house at point D to the house at point E, a surveyor measures ÚDFE, which he finds is 73‹40'. The distance from the house at point D to point F is 15 ft, and the distance from point F to the house at point E is 28 ft. ...
*February 16, 2012*

**geometry**

Thank you a ton!!
*February 16, 2012*

**geometry**

On a map, Town A is 8 km due south of Town B, Town C is 9 km from Town A, and Town C is 3 km from Town B (see figure below). Find the bearing from Town A to Town C and the bearing from Town B to Town C.
*February 16, 2012*

**trig**

how to graph y = 1/2 cos 2x for 0 ≤ x ≤ 2 p
*February 16, 2012*

**chemistry**

Given the following equation, how many grams of PbCO3 will dissolve when exactly 1.0 L of 1.00 M H+ is added to 6.00 g of PbCO3? When the equation is PbCO3(s) + 2H(+)(aq) = Pb(2+)(aq) + H2O(l) + CO2(g) Please explain in detail, step by step
*February 16, 2012*

**geometry**

a tree cast a shadow 25 feet long. the angle of elevation from the far end of the shadow to the top of the tree is 64 degrees,find the heighth of the tree
*February 16, 2012*

**Chemistry**

Thank you so much! I really appreciate the explanation!
*February 12, 2012*

**Chemistry**

i followed your steps and got .222 and its not right. for m i calulated 13.387 and for moles of solute i got .333. and then finally i got .222. could you please help me?
*February 12, 2012*

**Chemistry**

A solution of 1.50g of solute dissolved in 25.0 mL of H2O at 25C has a boiling point of 100.95C. What is the molar mass of the solute if it is a nonvolatile non electrolyte and the solution behaves ideally. (d of H2O at 25C=0.997g/mL)?
*February 12, 2012*

**math**

A car is traveling at 120 km/h. How far does it travel in 6 1/3 hours?
*February 12, 2012*

**math**

173.32 . Steve even worked it out.
*January 19, 2012*

**chemistry**

How many molecules are in 3.78 moles of carbon dioxide?
*November 22, 2011*

**math**

the lappans buy three large sandwich wraps to serve at a picnic. nine people in all will be at the picnic. showthree different ways to cut the sandwich so that each person gets an equal share
*November 3, 2011*

**Chemistry**

a chemical engineer placed 1.520 g of a hydorcarbon in the bomb of a calorimeter. The bomb was immersed in 2.550 L of water and the sample was burned. The water temperature rose from 20.00C to 23.55C. If the calorimeter (excluding the water) had a heat capacity of 403 J/K, ...
*October 31, 2011*

**Chemistry**

Sulfur dioxide is used to make sulfuric acid. one method of producing it is by roasting mineral sulfides, for example, FeS2(s) + O2 (g) ---> SO2(g) + Fe2O3(s) (unbalanced). A production error leads to the sulfide being placed in a 950-L vessel with insufficient oxygen. ...
*October 27, 2011*