Friday

April 18, 2014

April 18, 2014

Total # Posts: 175

**math**

Jessica says she can add 1/3"2/6"3/9"4/12"and 5/15 together using mental math.Explain how she can do this.

**math**

An isoscelless triangle of sides of 13cm, 13cm, 10cm is inscribed in a circle is inscribed in a circle. What is the radius of the circle?

**math**

An isosceles triangle of sides 13cm, 13cm, 10cm is inscribed in a circle. What is the radius of the circle?

**Math**

A line in coordinate plane contains the points P(2, -7) and Q(-4, -1). What point is the midpoint of PQ?

**physics**

A body of mass 10kg in air and 4kg in water calculate the volume and its density

**physics**

An object of volume 4 metercube is immersed in a liquid of density 1030 kilogramme per meter cubic meter calculate the upthrust of liquid of the object

**physics**

An object of volume 4 metercube is immersed in a liquid of density 1030 kilogramme per meter cubic meter calculate the upthrust of liquid of the object

**physics**

An object of volume 4 metercube is immersed in a liquid of density 1030 kilogramme per meter cubic meter calculate the upthrust of liquid of the object

**physics**

An object of volume 4 metercube is immersed in a liquid of density 1030 kilogramme per meter cubic meter calculate the upthrust of liquid of the object

**physics**

An object of volume 4 metercube is immersed in a liquid of density 1030 kilogramme per meter cubic meter calculate the upthrust of liquid of the object

**physics**

A ball is thrown horizontally from the top of a building 150 meters high. The ball strikes the ground 56 meters horizontally from the point of release. What is the speed of the ball just before it strikes the ground?

**physics**

A ball is thrown horizontally from the top of a building 150 meters high. The ball strikes the ground 56 meters horizontally from the point of release. What is the speed of the ball just before it strikes the ground?

**physics**

A ball is thrown horizontally from the top of a building 150 meters high. The ball strikes the ground 56 meters horizontally from the point of release. What is the speed of the ball just before it strikes the ground?

**math**

find the sale price. round to the nearest cent. 7. regular price: $57.63 percent of discount: 10% $63.39 $5.76 $51.87 $57.53

**math**

How do i convert 7 2/5 into a decimal

**science**

sorry i do not know why it posted that so many times :/ lol :)

**science**

The answer is most definitely D. Take it from an A+ science student.

**science**

The answer is most definitely D. Take it from an A+ science student.

**science**

The answer is most definitely D. Take it from an A+ science student.

**Science**

A ball is thrown horizontally from the top of a cliff 20m high. If the initial horizontal velocity is 8.0m/s,find how long it takes to reach the horizontal plane at the foot of the cliff.

**Math, Algebra**

Need to check answers. Q1. Find the length of the following segment created by these pairs of endpoints: (0, 1), (0, 7) Answer : 0 Q2. Find the length of the following segment created by these pairs of endpoints: (9, 6), (12, 6) Answer : 3 Q3. Find the length of the following ...

**Civics**

i have

**Civics**

List the basic problem of scarcity and how it drives economic decison-making. Describe the role of factors of production. What is supply and demand? Apply the principles of supply and demand that predicts market prices and incentives for buyers and sellers.

**Math**

Mike scored 85, 88, 87, 93, 95, 92, and 83 on his math tests. What is the least he can score on the next test if he wants to maintain a 90 average? PLZ HELP ME!!!!!!!! I'm so confused

**english**

1. people find life being with others 2. personification 3. trouble is coming 4. if you call them, the dogs will come back

**Statistics**

the scoring of IQ tests is designed so that the scores of the test taking population are normally distributed with a mean of 100 and a standard dev of 15. what percent of the population have an IQ less than 92? how do i figure this out?

**fractions**

what is 4 2/8 plus 5 6/7.

**Ms.Sue or Steve can u please help me?!?!!?**

so gabby was the answer to number 9 what you said or what reiny said?

**Geography**

What are the differences betwen formal, functional, and perceptional regions?

**Math**

How many seven-digit numbers are there when 0 and 1 cannot be the leading number?

**English**

All of them answers are wrong , i just used those answers and they were wrong. i got a 20 thanks to these wrong answers

**Government**

I wasn't guessing, and i don't have the materials for this problem, i have like printed out lessons and this is one my teacher didn't print out...

**Government**

After the passage of the 19th Amendment, white women _____. 1.)faced the same practical obstacles to voting as blacks did My answer2.)received the right to vote in Wyoming for the first time 3.)were accorded the protections of the Bill of Rights 4.)faced few of the practical o...

**Government**

Is it 3?

**Government**

Which of the following statements is incorrect? 1.)Early representative parliaments were elected by the people. 2.)Representation is a crucial element of democracy in large polities. 3.)The development of representative parliaments helped establish the principle of consent of ...

**chemistry**

What mass of ZnCl2 is needed to make 4 L of 1.8 M solution?

**math**

372,450

**Math**

Help, I can't find the pattern rule for this sequence(eg. -6,-3,2,9,18 and the pattern rule is n squared-7) The pattern: 6,28,64,114,178. What's the pattern rule? The pattern: 96,84,64,36. What's the pattern rule? The pattern: 0,24,216,960. What's the pattern r...

**geometry**

a phone company charges a flat monthly fee of $15 for cell phone services, plus an additional fee for every minute you talk. in a given month, you are charged $36 for the 24 minutes you talked( not including the $15 flat fee.) let the total cost be c(in $) and the time you tal...

**Phys sci**

we are makeing rube goldberg machiens but are problem is hot to activate the pulley by putting the string in to the fire befor its time and makeing the machine do other things.

**Science**

A jar contains one half of a kilogram of water. How many grams of water does it have?

**Trigonometry**

Solve: 2cos^2 theta - 3cos theta+ 1= 0 interval [0, 2ð)

**Trigonometry**

(1+ tan^2x)/(secx)

**Trigonometry**

sin x= -1

**Calculus**

Assume you wish to make a box whose base is a rectangle with one side twice as long as the other side and whose volume is 100 m^3. What would the minimum surface area be, if there is a minimum surface area? b) Under the same sceenerio as in (a), what would the maximum surface ...

**Calculus**

Find the derivative of f(x) =cos^-1(x^2) Ok so I'm having a little confusion with the chain rule and I'm not sure if my answer is right... will the answer be... 2x(-cos^-2(x^2)(-sin(x^2)?

**Physics (please help!!)**

The Crab pulsar (m=2.00x10^30 kg) is a neutron star located in the Crab Nebula. The rotation rate of the Crab pulsar is currently about 30.0 rotations per second, or 60.0pi rad/s. The rotation rate of the pulsar, however, is decreasing; each year, the rotation period increases...

**Calculus**

Find the derivative of f(x)=e^(sin(1))+(sin(1))^x.

**Calculus**

Find the derivative of f(x)=e^(sin(1))+(sin(1))^x

**Physics (please help!!!!)**

A cart running on frictionless air tracks is propelled by a stream of water expelled by a gas-powered pressure washer stationed on the cart. There is a 1.00-m^3 water tank on the cart to provide the water for the pressure washer. The mass of the cart, including the operator ri...

**Physics (please help!!!!)**

A cart running on frictionless air tracks is propelled by a stream of water expelled by a gas-powered pressure washer stationed on the cart. There is a 1.00-m^3 water tank on the cart to provide the water for the pressure washer. The mass of the cart, including the operator r...

**Never mind I figured it out...**

Thanks anyways...

**Physics (please help!!!!)**

An astronaut is performing a space walk outside the International Space Station. The total mass of astronaut with her space suit and all lher gear is 127 kg. A small leak develps in her pulsion system and 5.84 g of gas are ejected each second into space with a speed of 754 m/s...

**Physics (please help)**

An astronaut is performing a space walk outside the International Space Station. The total mass of astronaut with her space suit and all lher gear is 127 kg. A small leak develps in her pulsion system and 5.84 g of gas are ejected each second into space with a speed of 754 m/s...

**math**

Make r the subject of the formula.V=1/3 pie r square h.2)express V in terms of N,T,K and Y:H=tvk square all over Y

**Calculus**

Let f(x)= (1/x). Use the limit definition of derivative to find f'(x). My professor's answer is: -1/x but I keep getting: -1/x^2 what do I have to do to get that answer?

**Calculus**

Let f(x)= (1/x). Use the limit definition of derivative to find f'(x). My professor's answer is: -1/x but I keep getting: -1/x^2 what do I have to do to get that answer?

**Chemistry**

Please help me with this one... What is the oxidizing agent in the following redox reaction: HNO3(aq) + K2CrO4(aq) + Fe(NO3)2(aq) -> KNO3(aq) + Fe(NO3)3(aq) + Cr(NO3)3(aq) + H2O(l) ?

**Chemistry**

I just got the answer... it's 0.25 M right?

**Chemistry**

Can someone please explain me how to do this problem? A 25mL solution of 0.5 M NaOH is titrated until neutralization into a 50mL sample of HCl. What was the concentration of the HCl?

**Calculus**

Thank you very much!

**Calculus**

Decide if the following function f(x) is differentiable at x=0. Try zooming in on a graphing calculator, or calculating the derivative f'(0) from the definition. f(x) = x^4sin(2/x), if x is not equal to 0, and f(x) = 0 if x = 0. If it is differentiable, what is the derivat...

**math**

if you divide 35 and 10 what would be the answer? would it be even or odd

**Spanish**

yes

**Chemistry**

How many milliliters of 0.645 M K2CrO4 are needed to precipitate all the silver in 405 mL of 0.190 M AgNO3 as Ag2CrO4?

**Physics**

$230

**physics**

Please help I really dn't know the answer

**Calculus**

Let f(x) = mx-12 if x is less than -5 = x^2 +5x -7 if x is greater than or equal to -5. If f(x) is a function which is continuous everywhere, then we must have m=_______

**Calculus**

A function f(x) is said to have a removable discontinuity at x=a if: 1. f is either not defined or not continuous at x=a. 2. f(a) could either be defined or redefined so that the new function IS continuous at x=a. ---------------------------------------------------------------...

**Calculus**

A 0.2 ml dose of a drug is injected into a patient steadily for 0.75 seconds. At the end of this time, the quantity, Q, of the drug in the body starts to decay exponentially at a continuous rate of 0.2 percent per second. Using formulas, express Q as a continuous function of t...

**Calculus**

A 0.2 ml dose of a drug is injected into a patient steadily for 0.75 seconds. At the end of this time, the quantity, Q, of the drug in the body starts to decay exponentially at a continuous rate of 0.2 percent per second. Using formulas, express Q as a continuous function of t...

**Calculus**

Sorry... Again... Before I posted the question, I could see the symbols... Consider the function f(x) = 8.5 x − cos(x) + 2 on the interval 0 less than or equal to x less than or equal to 1. The Intermediate Value Theorem guarantees that there is a value c such that f(c) ...

**Calculus**

Sorry... Consider the function f(x) = 8.5 x − cos(x) + 2 on the interval 0 ¡Ü x ¡Ü 1. The Intermediate Value Theorem guarantees that there is a value c such that f(c) = k for which values of c and k? Fill in the following mathematical statements, gi...

**Calculus**

Sorry, I had problems posting all these questions... Let f(x) = mx-12 if x is less than -5 fr(x)= x^2 +5x -7 if x is greater than or equal to -5. If f(x) is a function which is continuous everywhere, then we must have m=_______

**Calculus**

Let If f(x) is a function which is continuous everywhere, then we must have m=________________

**Calculus**

OK I made a mistake... AGAIN fx is not equal to that sorry. I will repost this question.

**Calculus**

I'm sorry, I was having some problems posting the questions.... Again Let f(x)= mx-12 if x is less than -5 x^2 +5x - 7 if x is greater than -5 Show that f(x) has a removable discontinuity at x=−7 and determine what value for f(−7) would make f(x) continuous at ...

**Calculus**

A function f(x) is said to have a removable discontinuity at x=a if: 1. f is either not defined or not continuous at x=a. 2. f(a) could either be defined or redefined so that the new function IS continuous at x=a. ---------------------------------------------------------------...

**Calculus**

A 0.2 ml dose of a drug is injected into a patient steadily for 0.75 seconds. At the end of this time, the quantity, Q, of the drug in the body starts to decay exponentially at a continuous rate of 0.2 percent per second. Using formulas, express Q as a continuous function of t...

**Calculus**

An electrical circuit switches instantaneously from a 2 volt battery to a 20 volt battery 3 seconds after being turned on. Sketch on a sheet of paper a graph the battery voltage against time. Then fill in the formulas below for the function represented by your graph. For t &l...

**Calculus**

Sorry... Consider the function f(x) = 8.5 x − cos(x) + 2 on the interval 0 ¡Ü x ¡Ü 1. The Intermediate Value Theorem guarantees that there is a value c such that f(c) = k for which values of c and k? Fill in the following mathematical statements, gi...

**Calculus**

Consider the function f(x)=8.5x−cos(x)+2 on the interval 0¡Üx¡Ü1 . The Intermediate Value Theorem guarantees that there is a value c such that f(c)=k for which values of c and k? Fill in the following mathematical statements, giving an interval with...

**Chemistry**

What is the equation for heat of CuCO3 and heat of Pb(NO3)2.

**arithmetic**

What is the area of the irregular shape of a cone if the radius is 7in and the height is 22in?

**Algebra**

@helper: Yes, thats it! I wasnt sure how to type it. I solved it while I was waiting, and thats the answer I got ,thanks so much!

**Algebra**

I really need help with this, please!

**Algebra**

I have an exponent properties test tomorrow, its our last one before the final, so its important, but anyways, there is one question on the review that is confusing me. Could you please help? Here it is : (2y2x7)(-xy)(9x-3y) I dont know if the exponents showed up, but the numb...

**english**

I'm a 8th grade student and i need to write a Proffesional Business letter to My 7th grade english Teacher can you help?

**english**

How about The world of English Language.

**8th grade**

awnser is 39.36 but i might be wron.

**math**

Why is it important to simplify radical expressions before adding or subtracting? How is adding radical expressions similar to and different from adding polynomial expressions? Provide a radical expression for your classmates to simplify. In your own words, explain the first c...

**3rd grade**

Complete to show how you can find the sum by making a ten, hundred or thousand. 9.8 +5= (8 +2) + ______

**Science**

A truck is going from 20 km/h to 59 km/h in .20 hours, has an acceleration of what?

**English Literature**

What are the external human problems? Thank you!

**English**

What is the object of preposition in this sentenc? Sheepishly, she told her father the story.

**Physics**

Figure 10-42 shows a uniform disk that can rotate around its center like a merry-go-round. The disk has a radius of 2.00 cm and a mass of 20.0 grams and is initially at rest. Starting at time t = 0, two forces are to be applied tangentially to the rim as indicated, so that at ...

**Physics**

Two vectors are given by a = 3.7i + 6.9j, and b = 1.9i + 4.7j. Find (b) a·b = (c) (a + b)·b = (d) the component of a in the direction of b = .

**ECONOMICS **

T OR F A rise in Canadian interest rates will boost the dollar's exchange value, reducing domestic price levels.

**ECONOMICS**

T OR F A payment made to a Canadian shareholder from an American corporation would be recorded as an invisible import.

**ECONOMICS**

T or F Interest payments on Canadian government debts to foreigners are a major reason for our negative current account.