Friday

February 24, 2017
Total # Posts: 105

**Math**

If tan(-a)=-5, find cot a

*February 6, 2017*

**Calculus**

Find the magnitude and direction angle of p=42i+35j

*February 4, 2017*

**Math**

Thank you. I wasn't sure how to put the information given into equations.

*January 17, 2017*

**Math**

A cart full of packages weighing 180 pounds is rolling down a ramp 12 feet long at an incline of 25° (the force applied by gravity is equal to the weight of the package). Find the work done by gravity as the cart moves the length of the ramp. Assume that friction isn't...

*January 17, 2017*

**Math**

Wei-Men make a square quilt that has an area of 100 square feet. It has twenty five square blocks each the same size. What is the length of each side of a block?

*October 2, 2016*

**math**

sorry that is supposed to be math not amth!

*July 11, 2016*

**amth**

Solve the multiple-angle equation. cos x/2 = - squareroot 3/2

*July 11, 2016*

**maths**

Use the cofunction identities to evaluate the expression below sin^2 21° + sin^2 61° + sin^2 69° + sin^2 29°

*July 11, 2016*

**maths**

Find all solutions of the given equation in the interval Í0, 2π) cos x/2 − s i n x = 0

*July 11, 2016*

**maths**

that isn't one of my answers?

*July 11, 2016*

**maths**

Use the product-to-sum formula to write the given product as a sum or difference. 6sin π/10 cos π/ 10

*July 11, 2016*

**stoichiometry**

When aluminum is mixed with iron(III) oxide, iron metal and aluminum oxide are produced along with a large quantity of heat. Fe2O3(s) + 2 Al(s) 2 Fe(s) + Al2O3(s) + heat What mole ratio would you use to determine moles Fe if moles Fe2O3 is known?

*January 10, 2016*

**8th grade math**

please help! input-1 output-45 Whats the relation?

*November 12, 2015*

**8th Grade Math**

The temperature in Toronto at noon during a winter day measured 4°C. The temperature started dropping 2° every hour. Which inequality can be used to find the number of hours, x, after which the temperature will measure below -3°C? Can you please check my answer? 4...

*November 5, 2015*

**8th Grade Math**

The temperature in Toronto at noon during a winter day measured 4°C. The temperature started dropping 2° every hour. Which inequality can be used to find the number of hours, x, after which the temperature will measure below -3°C?

*November 5, 2015*

**Math**

Hey Katie neither do I. But is this this Katie from SWCS

*October 14, 2015*

**Physical Science**

A hot iron ball is dropped into 200.0 g of cooler water. The water temperature increases by +2.0°C and the temperature of the ball decreases by -18.6°C. What is the mass of the iron ball?

*July 15, 2015*

**Maths**

A water tank has the shape of a rectangular prism of base 50 cm2. This tank is being filled at the rate of 12 liters per minutes. Find the rate at which the height of the water in the water tank increases; express your answer in millimeters per second. I have no idea how to do...

*July 14, 2015*

**JUSTIFYING UNETHICAL BEHAVIOUR**

REED: THANKS

*May 16, 2015*

**JUSTIFYING UNETHICAL BEHAVIOUR**

SUE: SORRY IF I DID NOT EXPLAIN CLEARLY BUT HELP WAS GIVEN OTHERWISE.

*May 16, 2015*

**JUSTIFYING UNETHICAL BEHAVIOUR**

A belief that an actiity is within resonable ethical and moral limits. a belief that an actiity is in the inividual or the companys best interest,is sfe because it will not be found pout or be publisized. A belief that an actiity helpsn the company, it would be condoned and ...

*May 15, 2015*

**chemistry**

what volume of a 0.247 M perchloric acid solution is required to neutralize 23.8 mL of a 0.156 M calcium hydroxide solution? _titration problem of acids/bases

*April 2, 2015*

**math**

Serena paid $20.20 for 36 rulers and folders. She bought 16 more folders than rulers. If each folder cost $0.50 more than each ruler, how much did each folder cost?

*March 12, 2015*

**math**

Thx

*March 12, 2015*

**ENGLISH**

IDENTIFY THE DEGREE OF COMPARISON USED IN THE FOLLOWING SENTENCE.THE AIR IS MORE HUMID SINCE THE THUNDERSTORM PASSED THROUGH TOWN

*January 29, 2015*

**history**

in 1893, the cleveland administration;s repeal of the sherman silver purchase act

*January 15, 2015*

**Coolio**

If a baseball player has 18 hits in 50 at bat,what is the probability that he will get a hit in his next at bat? Express your answer as a decimal number in the thousandths place.

*September 10, 2014*

**math**

Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.37 cross 10−5 ( to the 5th power) watts/cm2 ( cm squared)

*June 5, 2014*

**Physics**

The anode (positive terminal) of an X-ray tube is at a potential of +125000 V with respect to the cathode (negative terminal). (a) How much work (in joules) is done by the electric force when an electron is accelerated from the cathode to the anode? (b) If the electron is ...

*April 19, 2014*

**Biology**

Im stumped... These answers I cannot find, please and thank you :) 1) In males, the primary target of FSH is the ______. 2)Testosterone and other androgens are secreted by the______. 3)During meiosis, when synapsis occurs, corresponding maternal and paternal chromosomes come ...

*April 12, 2014*

**EARTH SCIENCE**

That was a funny argument

*January 7, 2014*

**Statistics**

A study of generator related carbon monoxide deaths showed that a sample of 6 recent years had a variance of 16.8 deaths per year. Find the 99% confidence interval of the true variance

*August 10, 2013*

**Math**

A study of generator related carbon monoxide deaths showed that a sample of 6 recent years had a variance of 16.8 deaths per year. Find the 99% confidence interval of the true variance

*August 10, 2013*

**Math**

What expression is equivalent to 16+ 56

*March 19, 2013*

**Maths**

And the height too

*February 20, 2013*

**Maths**

How do you figure out the diameter of the base of a truncated cone with the measurement of the leaning side and the diameter of the top circle face?

*February 20, 2013*

**algebra**

Thanks! No typo, it must just be another trick up my teacher's sleeve!

*November 12, 2012*

**algebra**

Johnny has $147 dollars in ten, five and one dollar bills. He has 38 bills. He has twice as many fives as tens. He has three more ones than fives. How many of each bill does he have?

*November 12, 2012*

**Math**

If Anna leaves her house at 11:00am and walks to her friends house located 1.34 miles away at 5 miles an hour walking speed, approximately what time will she get there?

*October 22, 2012*

**pre calculus**

How do you solve c + 70 + 12c = 196 - 5c

*September 19, 2012*

**Spanish III Portfolio**

I am trying to say "Merge" onto that freeway.

*August 19, 2012*

**Spanish III Portfolio**

Hello, I am completing a written assignment for my final portfolio and I just wanted to make sure this is grammatically correct and makes sense. Prompt: Think of where you live in relation to the nearest airport. Write down directions on how to arrive at the airport from your ...

*August 19, 2012*

**English 11**

what if the author of the article is unknown and it just says its an article from fox news or something like that

*August 14, 2012*

**English 11**

when writing a summary of an article what are other ways to let others know that you are talking about the article besides saying the article says this______ or the article is this______?

*August 14, 2012*

**Math**

A manufacturer of an anti-inflammatory drug claims that the drug will be effective for 6 hours. An independent testing service determined that the drug was effective for only 80% of the length of time claimed by the manufacturer. Find the length of time the drug will be ...

*May 27, 2012*

**Math**

I have a challenge of drawing as many rectangles as I can but using only 8 squares on a grid that's only 4 across and 4 up. I can only draw two....

*May 7, 2012*

**Math**

I have a challenge of drawing as many rectangles as I can but using only 8 squares on a grid that's only 4 across and 4 up. I can only draw two....

*May 7, 2012*

**Math**

What?

*February 29, 2012*

**Statistics**

Among first year students at a certain university, scores on the Verbal SAT follow the normal curve; the average is around 550 and the SD is about 100. a) what percentage of these students have scores in the range 400 to 700? b) There were about 1000 students with scores in ...

*February 17, 2012*

**calculus**

A hunter at a distance dx from a coconut tree points the nuzzle of his gun directly at a monkey sitting on the tree at a height dy. The monkey sees the hunters and drops vertically from the tree at the very instant of firing. Will it be hit by the bullet?

*February 15, 2012*

**physics**

What does it mean when they say that action equals reaction?

*February 10, 2012*

**physics**

a cannon fire a bullet into a castle. leave the gun with velocity of 110 with an angle of 20. the bullet reaches highest point at P when it is 1 m above the castle. What is the height of the top of the castle? and waht is the horizontal distamce between the accnon and the castle

*February 5, 2012*

**3rd grade math**

i am in 3erdgr I cant find the answer! can some on help the problem is: Marcia said that if she estimates 73 times 7 the product will be less than the exact answer. is she correct? Explain. ps you round the 73!

*November 29, 2011*

**calculus**

identify the type of curve and sketch the graph of y2-2x+6y+5=0

*September 19, 2011*

**Math**

Shawna thinks that 8 x 2 = 17. What number pattern shows that she is not correct?

*February 16, 2011*

**physics**

A car is moving along with a velocity of 88ft/sec and has a weight of 2000lbs. The engine suddenly stops. If the coefficient of frictgion between the car and road is .2.(a) Find the acceleration. (b) How long will it take to come to rest? (c) How far will it travel before it ...

*February 2, 2011*

**physics**

An object has a mass of 2kg and rests on a surface where the coefficient of friction is .2. (a) Find the acceleration of 10 m/sec squared (b) Assume Vi=0, how long does it take to travel 100m? (c) What is the velocity at this time?

*February 2, 2011*

**math**

620

*January 26, 2011*

**math**

how many pieces of ribbon each 4.5 cm long can be cut from alength of 4 and a half metres?

*January 26, 2011*

**physics**

What force must be exerted to prevent a truck weighing 15 tons from rolling down an inclined plane which makes an angle of 3 degrees with the horizontal.

*January 17, 2011*

**physics**

The rafters of a roof meet at an angle of 120 degrees. What force is exerted along the rafters by an object weighing 6000nt suspended from the peak?

*January 17, 2011*

**Physics**

Two forces act concurrently on a point P. One force is 60nt due east. The second force is 80nt due north. (a) Find the magnitude and direction of their resultant. (b) What is the magnitude and direction of the equilibriant?

*January 17, 2011*

**physics**

what is the coefficient of sliding friction between a 3.2kg sled and snow when the sled, carrying a 25kg boy, can be pulled with a force of 35nt?

*January 11, 2011*

**physics**

What is the force required to move a 22kg ccrate up an incline of 35 degrees, if the coefficient between the two surfaces is .30?

*January 11, 2011*

**physics**

A boy exerts a horizontal force of 2nt to pull his 2kg sled over the snow. If he gives someone a ride on his sled and he has to exert a 12nt force to pull the sled, how much does that person weigh and what is their mass?

*January 11, 2011*

**physics**

(a)If a crate slides down a 10 degree incline at uniform speed, what is the coefficient of friction between the crate and the incline?(b)What is the coeffiecient of friction using a 20 degree incline?(c)What is the coefficient of friction using an n degree incline?

*January 11, 2011*

**physics**

A box having a mass of 50kg is dragged across a horizontal floor by means of a rope tied on the front of it. The coefficient of friction between the box and the floor is .3. If the angle between the rope and the floor is 30 degrees, what force must be excerted on the rope to ...

*January 11, 2011*

**Human Physiology**

How do low plasma protein levels produce edema?

*January 9, 2011*

**Human Physiology**

What would be the effect of low blood protein levels on the colloidal pressure?

*January 9, 2011*

**Physics**

The period of revolution of a satellite is 90min. What is the altitude above the surface of the earth?

*December 20, 2010*

**Physics**

A car goes through a curve with a constant velocity of 60mph and experiances a centripital acceleration of 77.4 ft/secsquared. Find the radius of the curve.

*December 20, 2010*

**Physics**

The frequency of an electon orbiting a nyclear is 1000000000 cps and the radius is 5 * 10 to the -12m. Find the velocity of the electron.

*December 20, 2010*

**physics**

a satellite orbits the earth at an altitude of 5000 m above the surface of the earth. Assuming that acceleration due to gravity is still 9.8 m/s/s, find the time for 1 revolution.

*December 19, 2010*

**Physics**

If radius = 1.25 when i am swinging a bucket around and around what is the slowest possible speed i can go without it spilling?

*December 19, 2010*

**physics**

the period of revolution of a satellite is 90 min. Find the radius of the orbit assuming an acceleration of 9.8 m/s/s.

*December 19, 2010*

**physics**

a body is projected at an angle with the horizontal with an initial of 500 m/s. 4 seconds later it hits the ground. find theta and the horizontal range.

*December 19, 2010*

**physics**

If a bomber travels horizontally at a speed of 250 km/hr and at a height of 5000 m how far away (measured horizontally) from the target must a bomb be released?

*December 19, 2010*

**physics**

two tall buildings are 80 m apart. A ball is thrown at 100 m/sec from one building toward the other but at an angle of 37 degrees below the horizontal. Find the vertical distance through which the ball falls before it hits the other building.

*December 19, 2010*

**physics**

A ball is thrown with a speed of 20 m/sec at an angle of 60 degrees below the horizontal from a bridge whisch is 30 m above the water. Where does the ball hit the water? How long is it in the air?

*December 19, 2010*

**chemistry**

1 liter of a 1 M lithium hydroxide solution is added to 1 liter of a 1 M barium chloride solution, and a precipitate forms. What ions are left in solution after the reaction is complete? What ions are left in solution after the reaction is complete?

*November 22, 2010*

**algebra**

Kayla wants to buy snack that weigh 1 kilogram How much she'll have to pay if she buy food in bulk. t=total price p=price per kilogram

*April 11, 2010*

**Math**

.2611

*March 5, 2010*

**Algebra**

what is the equivalent expression of g+x

*December 13, 2009*

**geography**

what makes a town a town a village a village and a city a city

*September 21, 2009*

**Science**

If the volume of 26.100 grams of chloroform has a density of 1.49 g per ml, then what is the mass? I got 18.125. Is this correct? My other question is, if the mass of an aspirin is 250 mg, then what is the mass in kg? I got, .00025. Is this correct? Thanks, Elise

*February 19, 2009*

**science**

If the volume of 26.100 grams of chloroform has a density of 1.49 g per ml, then what is the mass? I got 18.125. Is this correct? My other question is, if the mass of an aspirin is 250 mg, then what is the mass in kg? I got, .00025. Is this correct? Thanks, Elise

*February 19, 2009*

**science**

Is milk a homogenous mixture? Thanks-Elise

*February 19, 2009*

**Algebra**

How do you factor c^2+3c-1? Thanks for your help -Elise

*January 26, 2009*

**French**

Can anyone find a French dictionary online with spoken pronounciations, where you click, and a voice pronounces the word? Thanks ~Elise

*January 25, 2009*

**electric field intensity**

6.91*10^4 N/C

*January 17, 2009*

**Math**

How do you do long division with polynomials? EX: x-2 divided by x^3 + x^2 +4x ???

*November 25, 2008*

**Algebra**

Below is a "complete the square problem" from a math help site on the internet. This is the original problem. 4x2 – 2x – 5 = 0 Move the loose number over to the other side. 4x2 – 2x = 5 Divide through by whatever is multiplied on the squared term. x^2-...

*November 13, 2008*

**algebra**

The square that I am supposed to complete is x^2+15x, and the answer is (x+15/2)^2. How does this answer account for the 15 separate from the 15^2? I am confuzzled. Same thing goes for x^2-7x the answer is (x-7/2)^2, but I don't see what happened to the original -7. Thanks...

*November 13, 2008*

**music**

I would suggest that you google these words together, for example "mozart prodigy" or "mozart chamber," etc. Find out what significance they play in Mozart's life, and then write a paragraph. You could organzize your paragraph in order of Mozart's ...

*November 13, 2008*

**music**

A search engine again would help you with this. Check your notes or textbooks from music class: these are pretty basic topics, so I'm sure your teacher would have given you some info on them. If not, just google it. This is not the kind of question people on jiskha will ...

*November 13, 2008*

**Algebra**

How does 3x(4x+5)-5(4x+5) factor out to be (4x+5)(3x-5) ? This may be wrong, because I wrote this answer in my notes, but could some one please explain this to me? Also, do you have any tips on factoring? I understand the concept when I see an example(Usually), but I have a ...

*November 13, 2008*

**Science**

What is part of the mantle that can bend like plastic?

*October 19, 2008*

**biology**

My teacher asked quite a few questions, but these are the ones with which I am having trouble...I have re-worded them somewhat for clarity. Can anyone please help me! Thank you! _____________________________________ Methotrexate is a cancer drug that inhibits the enzyme “...

*March 21, 2008*

**Business Economics**

I got a few answers but I don't know which one is correct. If the SMC = 80 - 0.1Q + 0.0001Q2, what would be the correct answer fo AVC? I'm still a bit confused.

*February 23, 2008*

**Business Economics**

How do you generate the average variable function (AVC) given the estimated marginal cost function (SMC)?

*February 23, 2008*