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Posts by elise

Total # Posts: 108

math
Find the sum of the infinite geometric series below, or indicate that the sum does not exist. 15+6+12/5+24/25+...

math
A ferry boat departed from port and traveled at a rate of ten miles per hour at an angle of 30 degrees north of east across a large river. If the current is flowing at a rate of 4 miles per hour straight south, what is the speed and direction of the boat in the water? Round ...

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

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

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

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...

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?

math
sorry that is supposed to be math not amth!

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

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

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

maths
that isn't one of my answers?

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

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?

math
10/7

8th grade math
please help! input-1 output-45 Whats the relation?

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...

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?

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

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?

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...

JUSTIFYING UNETHICAL BEHAVIOUR
REED: THANKS

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

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 ...

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

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?

math
Thx

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

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

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.

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)

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 ...

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 ...

EARTH SCIENCE
That was a funny argument

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

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

Math
What expression is equivalent to 16+ 56

Maths
And the height too

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?

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

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?

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?‎

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

Spanish III Portfolio
I am trying to say "Merge" onto that freeway.

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 ...

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

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______?

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 ...

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....

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....

Math
What?

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 ...

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?

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

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

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!

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

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

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 ...

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?

math
620

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

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.

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?

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?

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?

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?

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?

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?

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 ...

Human Physiology
How do low plasma protein levels produce edema?

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

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

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.

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.

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.

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?

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.

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.

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?

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.

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?

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?

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

Math
.2611

Algebra
what is the equivalent expression of g+x

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

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

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

science
Is milk a homogenous mixture? Thanks-Elise

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

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

electric field intensity
6.91*10^4 N/C

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

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-...

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...

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 ...

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 ...

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 ...

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

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