Tuesday

July 22, 2014

July 22, 2014

Total # Posts: 800

**Physics**

We use a wrench to turn nuts on bolts because they require less force. Consider a hexagonal nut 1 cm in diameter. We can tighten this nut with one of two wrenches, wrench A with lever arm 10 cm and wrench B with lever arm 20 cm. Both wrenches have a very small mass, so you may...

**Trigonometry**

Let S be the sum of all the possible values of sin x that satisfy the following equation: 5-2cos^2(x)-7sin(x) = 0 S can be written as a/b, where a and b are coprime positive integers. What is the value of a + b?

**Calculus**

The location of a dot P at a given time t in the x-y plane is given by (x,y) = (t - sin t, 1 - cos t). What is the distance traveled by P in the interval 0 <= t <= 2pi

**algera 1A**

I thought the formula i was suppose to use is y2-y1 x2-x1 which equals to (-15,- -11)and(-20,- -2) Then I got -4/-18 which equals to -2/-9

**algera 1A**

find the slope, if it exists,of the line containing the pair of the points. (-2,-11) and (-20,-15). I came up with (-2,-9)is this correct?

**algebra 1A**

correction the pair are (-2,-11) and (-20,-15).

**algebra 1A**

find the slope, if it exists,of the line containing the pair of the points. (-2,-1) and (-20,-15).

**fractions**

stupid and thanks you a******

**Math**

a+p =5 p 11/4 >a

**Math**

2k+7=5k-k

**Math**

2k+7=5k-k

**Physics**

In order to measure the length of a long flourescent ceiling lamp, a student makes a very small hole in a piece of paper, holds the paper above the floor, measures the distance between the hole and the floor, and finally measures the length of the light's image on the floo...

**Help please edu.**

Young children with autism: A. Will never talk B. relate to people differently than typical children do C. get along better with older children D. like changes in their routine I think B am I correct

**Phsics**

What is the terminal speed for an 77.0kg skier going down a 44.0 degrees snow-covered slope on wooden skis uk= 0.060? Assume that the skier is 1.70m tall and 0.300m wide.

**Algebra 1- Math**

The sum of a smaller number and twice a larger number is 67. If the smaller number is increased by 5, the sum will equal the larger number. Find the numbers. A rectangles width is four more than twice its length. Its perimeter is 62. Find the dimension of the rectangle?

**Algebra 1- Math**

how do u solve 3x=y-5

**Algebra 1- Math**

what has the same slope but different y-intercept?

**Math**

Now-Next minus a negative 2

**Algebra 1- Math**

Can anyone please show me and explain how to solve 9x+2=3y? Thanks,Bye.

**Physics**

6.7²/(2g) + 9.1 = 11.39 m b) t = 2√[2H/g] = 3.05 sec; X = 6.6*t = 20.125 m c) Vf = (6.6i - 6.7j) m/s d) Θ = arctan[j/i] = arctan[-6.7/6.6] = -45.43°

**science**

The Sun.

**physics**

acceleration = force / mass A = 500/ 2000 a = 0.25 m/s/s

**physics**

calculate the acceleration of a 2000-kg single air plane just before takeoff when the thrust of its engine is 500 N

**physics**

A compact car, mass 875 kg, moving south at 16 m/s, is struck by a full-sized car, mass 1660 kg, moving east at 12 m/s. The two cars stick together, and momentum is conserved in the collision. The wreck skids along the ground and comes to a stop. The coefficient of kinetic fri...

**chemistry**

1.00 g zinc and 0.80 g sulfur are allowed to react all the zinc is used up 1.50 g of zinc sulfide is formed and some unreacted sulfur remains what is the mass of unreacted sulfur

**Help please**

Number the items to show the most effective and the least effective to use to scratch the mineral to test its hardness. Use number 1 for the most effective and the 4 for the least efective. Chalk(1) Fingernail(2) Steel screw(4) Paper clip(3) Am I correct????

**Help please**

According to the textbook,an individual's most. Important decision that will effect the climate is: a. The choice to unplug an extra freezer that is rarely used b. looking for the energy star on new appliances c. Selecting a fuel efficient automobile d. Planting a tree I t...

**math**

if jay eats 1/3 of jelly beans and jack 1/4 of the jelly bean leveing bill with 10 jelly bean how many were there to start with

**Probability PLEASE CHECK **

What is the probability of a game being sold if 18,980,000 of that title was sold out of a total 68320,000 different video games Is it 19,989,000/68320,000 1890/6832 = 27.77% rounded to nearest tenth

**Math-truth table, please check my work!**

p -> ~q , p -> q Are these Equivalent statements? This is my try. Please let me know if these truth tables are correct. p -> ~q p q p -> ~q p q p -> q T T T T T T T F T T F F F T F F T F F F T F F T The statements are not equivalent.

**Math-Syllogism valid?**

Some snakes are poisonous. A rattlesnake is a snake. Therefore: a rattlesnake is poisonous. Is syllogism valid or invalid?

**math-Tiling a room**

How much does it cost to tile a room that is 420 sqft if the tiles used are 1 foot on a side and cost $0.95?

**statistics-expected value**

100 raffle tickets are sold for $3 with one grand prize of $200. Julie purchased one ticket. What is the expected value of her ticket? What is the fair value of a ticket?

**math**

100 raffle tickets are sold for $3 with one grand prize of $200. Julie purchased one ticket. What is her expectation? What is the fair value of a ticket?

**math**

4y X 4y = 16y squared

**math - expected value and fair price**

one hundred raffle tickets are sold for $3 each. one prize of $200 is to be rewarded.Lisa purchases one ticket. a- what is her expected value b- what is the fair price for a ticket?

**Statistic- Average**

A mean average of 60 on 6 exams is needed to pass a course. on his first 5 exams, Adam received grades of 46,73,73,63 and 70. If the lowest grade of the exams already taken is to be dropped, what grade must he receive on his last exam to get a C in the Course?

**solve for x with inequality**

(387-46)+x/6=> or = to 70 (341)+x = or > than 70

**algebra**

(387-46)+x/6=> or = to 70

**statistics **

A license plate is to have 3 digits followed by 2 uppercase letters. What is the number of different license plates possible if repetition of numbers and letters is not permitted?

**statistics-?mean average with lowest number out?**

A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?

**statistics-?mean average with lowest number out?**

A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?

**math**

A mean average of 60 on 7 exams is needed to pass a course. on his first 6 exams, Adam received grades of 46,74,70,59,66 and 72. if his lowest grade of the exams already taken is to be dropped,what grade must he receive on his last exam to pass?

**math**

how many different committees can be formed from 6 teachers and 31 students if the committee consists of 4 teachers and 4 students?

**English I Speech**

Can anyone tell me 3 reasons why fracking is either good or bad and 3 supporting details? Please, thank you It's urgent

**English I Speech**

Can anyone please share their idea of a strong, powerful hook, background information and thesis about fracking? Please this urgent. Be quick like your life depends on it.

**Algebra 1- Math**

At the ocean's surface the pressure is 1 atmosphere. At 66 feet below seal level, the pressure is 3 atmosphere. The Relationship between the pressure and the depth is linear. a. find the independent and dependent variable. b. create 2 ordered pairs. c. find the slope. d. i...

**Algebra 1- Math**

A software company started with 2 employees. In 6 months, the company had 14 employees. The number of employees increased at a steady rate. a. create 2 ordered pairs. b. find the slope. c. Interpret the meaning of the slope. d. Find the prediction equation.

**wireless communications**

what is the period of the space shuttle traveling at 250km above the earth and what is its velocity

**Fractions**

Solve by drawing a diagram. A Tour bus travels 7 1/2 mi south, 3 1/2 east, 4 1/3 mi north, and 11 1/2 mi west. How far has the tour bus traveled when it crosses its own path?

**geography**

thank you for your help:)

**geography**

the list i gave you

**geography**

i need to know what influences they had

**geography**

i need to know the influences they had

**geography**

Central asia Complete the following: Describe what influence the former invaders of this region brought into the regions culture. a. Turkic b. Arabs c. Mongols under Genghis Khan D. Mongols under Timur e. Russians f. Soviet

**geography**

in Centrel Asia why are temperatures in this region often really cool at night, but sweitering hot during the days?

**science**

Calculate the heat of combustion of this wax in kJ/mol. How much energy is produced per carbon? What is the limiting reagent? I have the Q=m*C*deltaT equation to be 10460.45 joules using 100.1 grams C25H52, 25 degrees C, and 4.18 J/gC. I don't know how to find how much ene...

**Math,Statistics**

Johnny suffers from Flu an average of 5 times per week. However, Tony claims that Johnny rarely suffers from fewer than 15 bouts flu per week. If Johnny has been suffering from flu for 180 weeks, at a minimum, how many of those weeks has he suffered from fewer ￼￼...

**Computers**

The answer is one that you must learn for yourself my friend...

**Information Technology**

The answer is one that you must learn for yourself my friend...

**Math**

The answer is one that you must learn for yourself my friend...

**Chemistry**

Dont worry bro i feel you the answer is 455C.

**language**

The answer is one that you must learn for yourself my friend...

**social study help plz**

The answer is one that you must learn for yourself my friend...

**soicial studys help plz**

The answer is one that you must learn for yourself my friend...

**Math/Management**

The answer is one that you must learn for yourself my friend...

**physics**

A dog runs 150{\rm m} away from its master in a straight line in 8.4{\rm s} , and then runs halfway back in one-third the time.Calculate its average speed,average velocity?

**Math**

5.5 in long and 3.2 in wide must enlarge so that both dimensions are 1.8 times greater

**physics**

On Planet Y, the value of g is 12 m/s/s. If the human weighs 685 N on this planet, then how much woud he weigh on earth?

**Algebra**

14

**Math**

If john must have a mark of 80% to past a test of 35 items, the number of items he may miss and still pass the test is

**Physics**

The leader of a bicycle race is traveling with a constant velocity of +11.9 m/s and is 10.7 m ahead of the second-place cyclist. The second-place cyclist has a velocity of +9.10 m/s and an acceleration of +1.20 m/s2. How much time elapses before he catches the leader?

**Math**

The grocery store sells kumquats for $4.25 a pound and Asian pears for $2.25 a pound. Write an equation in standard form for the weights of kumquats k and Asian pears p that a customer could buy with $18.

**Math ( Can You check my Work?)**

1.an = 3n - 1 2. an = 2(2n - 3) 3.an = 4^n 4.an = (2/3)^n 5. an = (-1)^n(n + 5) 6. an = (-1)^n + 1(n + 6) 7. an= n+3/2n-1 8. a1 = -5 and an = an-1 - 3 for n ≥ 2 9. a1 = -6 and an = -2an-1 for n ≥ 2 10.a1 = 4 and an = 3an-1 + 2 for n ≥ 2 11. Find a8 when a1 = ...

**math**

A radio transmission tower is 170 feet tall. How long should a guy wire be if it is to be attached 7 feet from the top and is to make an angle of 30° with the ground? Give your answer to the nearest tenth of a foot

**Math ( i just need these two to finish my workshet**

Show the solutions of 1. If a = 4, b = 3, and A = 36o. 2. If a = 3, b = 4, and A = 48.59o Finding a "solution" means solving for all missing sides and angle measures in each triangle.)

**readings in world civilization**

The answer is one that you must learn for yourself my friend...

**Math i dont understand**

Window: [-4π , 4π , 1] [-10,10,1] State the Period, Amplitude, Phase Shift, Vertical Shift and Equation in cosine for #5 Number five is a graph is there a way i can show u it i think its valuable for the help on this question

**Math ( I Dont understand)**

A Amplitude: Maximum y-coordinate – minimum y-coordinate divided by 2 ( Max y – Min y)/2 B Adjustment for period change: B = 2 Period π C Phase shift: Right or left x - transformation D Vertical shift: Maximum y-coordinate + minimum coordinate divided by 2 ( Max...

**Math ( I Dont understand)**

f(x) = A sin(B(x - C)) + D or f(x) = A cos(B(x - C)) + D thats the equation

**Math ( I Dont understand)**

State the Period, Amplitude, Phase Shift, Vertical Shift, and equation (using cosine

**Math**

an = 3n - 1 Answer 2, 3, 4, 5 2, 5, 8, 11 -2, -5, -8, -11 4, 7, 10, 13 3 points Question 2 Write the first four terms of the sequence whose general term is given. an = 2(2n - 3) Answer -6, -2, 2, 6 -1, 1, 3, 5 -2, -4, -6, -8 -2, 2, 6, 10 3 points Question 3 Write the first fo...

**Math**

In 1983, the population of Functionville was 2560, and it tripled in 6 years. a. Write an exponential model for the population of Functionville t years after 1983. b. According to your model, it what year had the population grown to 7 times its size?

**Math**

Use the compound interest formulas A = P(1 + r/n)nt and A = Pe^rt to solve. Find the accumulated value of an investment of $3000 at 9% compounded continuously for 3 years.

**Math please help with these word problems i have**

thank yall so much

**Math please help with these word problems i have**

1.360pie *2r 2.Area+4L 3.4x(4s) 4.f=M+A 5.P(u) 6. x=3.95*x 7. 13.45*Fbs 8. x*2yz/72 9. L/20f+W 10. 2x(2x+2)=W 11. ? 12. ? Sorry i suck at these

**Math please help with these word problems i have**

1. The circumference of a circle is the product of the number π and twice the radius. 2. The area of a square is the square of the length of a side. 3. The perimeter of a square is four times the length of a side. 4. Force equals the product of mass and acceleration. 5. P...

**Math PLEASE HELP PLEASE PLEASE PLEASE**

Question 1 Write the first four terms of the sequence whose general term is given. an = 3n - 1 Answer 2, 3, 4, 5 2, 5, 8, 11 -2, -5, -8, -11 4, 7, 10, 13 3 points Question 2 Write the first four terms of the sequence whose general term is given. an = 2(2n - 3) Answer -6, -2, ...

**CRITICAL THINKING**

What are your thoughts about overthinking and under thinking?

**Math**

Why is the asymptote of the function in Example #1 y=2 ? ( y = 4x+3 + 2 )

**Math**

f(x) = (x - 0.6)2 + .66. turn into h/k form what is the quadratic regression equation using your calculator

**ELECTRIC APPLIANCE TOOLS AND TESTERS**

An important safety precaution you should take before starting any electrical servicing job is to make sure that your

**Math**

Among all pairs of numbers whose difference is 88, find a pair whose product is as small as possible.

**Math**

In one U.S. city, the quadratic function models the median, or average, age, y, at which men were first married x years after 1900. In which year was this average age at a minimum? (Round to the nearest year.) What was the average age at first marriage for that year? (Round to...

**Math**

A developer wants to enclose a rectangular grassy lot that borders a city street for parking. If the developer has 344 feet of fencing and does not fence the side along the street, what is the largest area that can be enclosed?

**Math**

farmer wants to enclose his pasture which is bordered by a river. If he uses 750 feet of fencing on three sides of the field, what is the largest area he can enclose?

**physics**

in a hypothetical thermometer, the freezing point of water is marked as -10 and the boiling point is marked at 70. What would be the reading if this thermometer is used to measure the temperature of 50 degree water?

**physics**

i completely drew a blank on the equation.....so easy Damon...thanks for your help Answer is 6250 cal?

**physics**

got 22 degrees celsius for the last answer from Damon. Another question is ......How much heat is needed to raise the temperature of a 500g object with specific heat capacity 0.5 cal/g c by 25 degrees?

**physics**

what is the equilibrium temperature if 100 grams of water at 20 degrees celsius is added to 50 grams of water at 62 degrees celsius in an insulated container of negligible mass?

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