Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 70,623

**Physics**

A 10.0N frictionless pulley is suspended from an overhead supported by a chain. two weights suspend off the pulley. One weight is 30.0N and the other is 20.0N. (a) What is the tension on the rope? (B) what is the acceleration of the weights? (c) what is the tension on the chain?

**math**

Copy of Consider the charged particle S2- Match the first column with the correct number in the second column. Note: •The same number may be used more than once, if necessary.. •Not every number will be used.

**Math**

Thank you so much, sir.

**Math**

If the height of an equilateral triangle is 9, what is its area? F. 27 G. 54 H. 81 J. 27 sqrt(3) K. 54 sqrt (3)

**algebra**

if t equal tip and meal meal write a function using a 13% tip

**English**

Are sitcom titles italicized or underlined?

**math HELP!!!!!!**

Suppose 10% of the flights arriving at an airport arrive early, 60% arrive on time, and 30% arrive late. Valerie used the random-number table to find the experimental probability that of 5 flights, at least 2 will arrive late. The digit 0 represents flights arriving early. The...

**Algebra **

The width of a rectangle is 2 less than twice its length. If the area of the rectangle is 82 cm^2, what is the length of the diagonal? Note: Your answer must be a number. It may not contain any arithmetic operations. w(w+20) = 8000 w^2+20w = 8000 w^2+20w-8000 = 0 (w-80)(w+100)...

**Algebra **

I have about 3 homework problem that I am stuck on! please help me. #1: The area of a rectangle is 16, and its diagonal is \sqrt{68}. Find its dimensions and perimeter. (x^2)+(y^2)=\sqrt{68} (x^2)+(y^2)=8.246 xy=16 y=16/x (x^2)+(16/x)^2=8.246 (x^4)+(96/x)=8.246 Then I got stuc...

**trig**

To guard against a fall, a ladder should make an angle of 75o or less with the ground. What is the maximum height that a 20-foot ladder can reach safely to the nearest tenth of a foot? in my diagram I set it up using the sin function since I want to find the height so I did (s...

**algebra**

you are given the 2012 value of a product and the rate at which the value is expected to change during the next 5 years. use this information to write a linear aquation that gives the dollar value V of the product in terms of the year. (let t=12 represent 2012). 2012 value $15...

**algebra**

if jack's truck is worth $4000 now but losing 8% of its value every year, what will it be worth in 5 years

**physics**

a. 242.5N b. 140N c. 0.5

**physics**

A 280 N block rests on a 30° incline. (a) What is the normal force exerted by the incline on the block? (b) What (static) friction force is needed to prevent the block from sliding down the incline? (c) What is the minimum coefficient of static friction needed?

**math**

A road has a 10% grade (slope).how much does it rise if it is 2 km long?

**algebra 2**

Let's be rational

**algebra**

Which of the following represents the sum of points p and t plotted below?

**math**

The t-shirts for the fundraiser will cost $4.00 to make and there is a $25.00 delivery fee. There are two sized wristbands; a large one that will cost $5.00 to make, and a small one that will cost $3.00 to make. If everyone who orders wristbands orders one small and one large ...

**College Algebra **

The width of a rectangle is 2 less than twice its length. If the area of the rectangle is 82 cm^2, what is the length of the diagonal? Note: Your answer must be a number. It may not contain any arithmetic operations. w(w+20) = 8000 w^2+20w = 8000 w^2+20w-8000 = 0 (w-80)(w+100)...

**math**

a man is in a boat 2 miles from the nearest point on the coast. He is to go to point q, 3 miles down the coast and 1 mile inland. If he can row at 2 mi/h and walk 4 mi/h toward what point on the coast should he row in order to reach point q in the least time?

**College Algebra ..Please help**

I've figure out number #1 so I no longer need assistance on that one. But please help me with the following 4 questions. PLEASE

**College Algebra ..Please help**

I have about 5 homework problem that I am stuck on! please help me. The first of 5 is: A rectangular garden is 20 ft longer than it is wide. Its area is 8000 ft{}^2. What are its dimensions? Im not even sure where to start with this one. Next #2: The area of a rectangle is 16,...

**Physics**

A 10.0N frictionless pulley is suspended from an overhead supported by a chain. two weights suspend off the pulley. One weight is 30.0N and the other is 20.0N. (a) What is the tension on the rope? (B) what is the acceleration of the weights? (c) what is the tension on the chain?

**College Algebra**

Thank You. I guess I was over thinking the problem a bit!lol It's my first semester and everything's so new. Thanks so much again

**College Algebra**

Thank You. I guess I was over thinking the problem a bit!lol It's my first semester and everything's so new. Thanks so much again

**College Algebra **

A rectangular garden is 20 ft longer than it is wide. Its area is 8000 ft{}^2. What are its dimensions? w(w+20) = 8000 w^2+20w = 8000 w^2+20w-8000 = 0 (w-80)(w+100) = 0 w-80 = 0 w=80 or w+100 = 0 w = -100 I think that x=80 makes more sense. However what would the length be if ...

**science**

can someone help me with this question from your perspective? I just need an example of how to write a similar question. Earth’s energy sources include both renewable and nonrenewable resources. Name at least three sources of energy that could be used in your house. Then ...

**rounding**

8.530 rounded to the nearest tenth degree = 8.5

**math**

For number 3 I need for help on how to do that one

**math**

350 is the amount of students that can order wristbands

**math**

For number 2 I figured out the answer so I do not need help with that one.

**math**

The t-shirts for the fundraiser will cost $4.00 to make and there is a $25.00 delivery fee. There are two sized wristbands; a large one that will cost $5.00 to make, and a small one that will cost $3.00. 1. Write an expression to represent the student council's total cost ...

**math problem**

After12 years I shall be 3 times as old as I was 4 years ago find my present age

**math problem**

Find an equation of the line that passes through two points. (0,4) and (7,10)

**math 1 question!!!!!!**

I am a boy you are a girl dont know that smell you work to much

**math 1 question!!!!!!**

Which is the best display for the set of the number of daily 911 calls made during a month, if you want to be able to identify the mode? A. Histogram with intervals of 5<----- B. Histogram with intervals of 3 C. Line plot D. Line graph

**math HELP!!!!!!**

THAX!!!!

**math HELP!!!!!!**

2. Researchers at Jackson Hospital asked 40 randomly selected patients about their sleep habits. Sixteen reported sleeping 8 hours or more each night. If their are 700 patients in the hospital, estimate the number of patients who sleep 8 hours or more each night. A.140 B.160 C...

**physics**

two objects of equal mass are placed in a room. Object A is placed on the floor and object B is placed on a table top that is 3 meters of the ground. Which one has more potential energy and why?

**math HELP!!!!!!**

Okay i got it C

**math HELP!!!!!!**

Oh okay my second choice would be D

**math HELP!!!!!!**

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporter's data is valid or not? A. The data is valid for t...

**MATH!!!**

Writing a linear equation You are given the 2012 value of a product and rate at which the value is expected to change during the next 5 years. Use this information to write a linear equation that gives the dollar V of product in terms of the year. (Let t=12 represent 2012). 20...

**trig**

Draw the graph of f(x) = tan x and g(x) = 2cos x for 180 _< thetha _< 180 {since its a graph I'm sure how to draw it here}

**science**

All living things must carry out certain functions and possess certain structures to survive, grow, and reproduce. The following chart illustrates how humans possess certain structures to carry out these critical functions. Fill in the plant structures that correspond to the h...

**science**

I have a question on homework. please help Sea otters are part of a giant kelp ecosystem. They feed on sea urchins that feed on kelp. How does hunting sea otters affect the population of sea urchins and kelp in the ecosystem?

**Trigonometry, can someone check this please**

thank you, and my tutor's not very good, and I am home schooled so I have to kind of learn it for myself no one is around to explain it and help me understand I do not have a book due to the budget

**Trigonometry, can someone check this please**

A sled travels from point A at the top of a hill to point B at the bottom. If the sled travels 120 m from A to B and the vertical descent AC is 50 m, what is the angle of depression to the nearest degree? arctan=50/120

**college algebra**

so w=80 and w=-100 ?

**college algebra**

How do I isolate w ?

**college algebra**

A rectangular garden is 20 ft longer than it is wide. Its area is 8000 ft{}^2. What are its dimensions? Let "w" equal the width w+20=8000 w^2+20=8000 not sure how to continue

**College Algebra **

I'm sorry I wrote the problem wrong previously. "The equation x^2-9x-1=0 has 2 solutions A and B. Where A < B. x^2-9x-1=0 (x-9)x=1 x^2=9x+1 (x-9/2)^2-85/4=0 Solutions x=1/2(9- sq root 85) and x=1/2(9 + sq root 85) I also have a second similar problem. 2x^2+17x+2=0 ...

**College Algebra **

The problems reads: "The equation x^2-9x=0 has 2 solutions A and B. Where A < B. The answers I got where x=0 and x=9, however my online homework is saying its incorrect. Please help me (x-9)x=0 x^2=9x (x-9/2)^2-81/4=0

**Math**

I still don't get it.

**Math**

Noreen recently took a job helping people register to vote. The job has a mandatory 10-day period of probation during which her success rate is strictly monitored. On her first day, she registered 30 people. Then, for each of the next 9 days, she registered 4 more people than ...

**science**

All living things must carry out certain functions and possess certain structures to survive, grow, and reproduce. The following chart illustrates how humans possess certain structures to carry out these critical functions. Fill in the plant structures that correspond to the h...

**Chemistry. HELP.**

ELASTICITY, LIKE YOUR SOCKS (10/10 points) The crystal structure of graphite is shown below. Use the figure to answer the following questions. Compare the Young's moduli for the directions indicated in the figure. Fill in the blank. The modulus along a is _________ that al...

**science**

All living things must carry out certain functions and possess certain structures to survive, grow, and reproduce. The following chart illustrates how humans possess certain structures to carry out these critical functions. Fill in the plant structures that correspond to the h...

**science**

Which female structure in a flowering plant traps pollen grains? a) pistil b) stigma c) ovary d) anther Answer A

**chemistry**

X-RAY DIFFRACTION OF AN UNKNOWN METAL, MIGHT BE DANGEROUS (10/10 points) Last week you and a friend started an experiment to obtain the X-ray diffraction peaks of an unknown metal. Through these diffraction peaks you wanted to determine: (a) whether the cell is SC, BCC, or FCC...

**helpppp**

250000(1+.045/12)^(12*3.5) = 292,559

**check set up trigonometry**

Lee is on a cliff 360 m above sea level, the angle of depression of a ship is 28 degrees. To the nearest meter, what is the distance between the ship and the base of the cliff? tan28=x/360?

**check my set up please, trig**

Sarah holds the end of her kite string 5 feet off the ground. The kite string makes a 43 degree angle of elevation with the horizontal and the kite is 105 ft. off the ground. How long is the kite string to the nearest tenth of a foot? cos43=100/x ?

**physics**

a body of weight 10 n is kept on a smooth horizontal table.what is the force exerted on the table by the body

**rounding to the nearest meter**

51.423 rounded to the nearest meter is 51? or 51.4

**check my arctan please**

arctan(1/12)= 4.763 rounded to the nearest tenth degree, which is 4.8? because arctan=inv tan

**chemistry**

340. mL of hydrochloric acid (HCl) acid is exactly neutralized with 500. mL 0.700 M NaOH solution. What is the concentration of the acid solution?

**check my set up please**

thank you

**check my set up please**

so the nearest meter would be 110.0

**check my set up please**

At a horizontal distance of 34 meters from the base of a tower, the angle of elevation to the top is 72 degrees. Find the line of sight distance to the nearest meter. I set this up tan72=x/34

**rounding**

thank you

**rounding**

6.5

**rounding**

rounding 6.535 to the nearest tenth of a foot = 6.54?

**trigonometry, check please**

A 12 ft. ladder makes a 33o angle with the side of a house. To the nearest tenth of a foot how high up on the house does the ladder come? I set it up 12xcos33 giving me 10.0

**math 221 intro to algebra**

When looking at the example of the slideshow, Equivalent Fractions, which is located in the media section of Chapter 1, the presenter divides out the common factor of _____. (Points : 1)

**PLEASE HELP W/ COMPUTER SCIENCE?? JUST 1 PROBLEM?**

Which specific language/environment are you using? VB?

**trigonometry, check my answer please?**

A 15 ft. ladder is leaning against the side of a house and forms an angle of 66o with the ground. To the nearest foot how far from the base house is the foot of the ladder? I set it up cos66=15/x 15/cos66 =36.878, rounding to the nearest ft makes it 37

**rounding**

Is 151.123ft rounded up or down? 150 or 152, or is it 151 flat out since it is a 1 after the decimal

**SCIENCE**

thank you.one day i want to be as smart as you are

**SCIENCE**

so its oval?

**SCIENCE**

WHICH ONE IS IT

**SCIENCE**

AND THIS the moon isn't a perfect sphere its kinda like a oval in a way The shape of the moon is an oblate spheroid, just like earth IS IT CORRRECT

**SCIENCE**

I ALSO FOUND THIS ANSWER:It is actually shaped like an egg. But the pointy part faces away from the earth.

**SCIENCE**

I TOLD MY TEACHER THAT. I USED THAT SAME WEBSITE AND SHE SAID SHE WANTS THE TRUE SHAPE AND I WAS CONFUSED

**SCIENCE**

COULD U HELP ME OUT A LITTLE PLEASE IM NOT GETTING ANYTHING ON IT

**SCIENCE**

WHAT IS THE TRUE SHAPE OF HE MOON? ANSWER:ORBIT IS THAT CORRECT

**Chemistry **

Find the number of moles of particles for NaCl

**trigonometry ans.**

oh okay, it's confusing, thank you guys!

**trigonometry ans.**

so it's 66 not 66.35 ? right

**trigonometry ans.**

At a point on the ground 50 feet from the foot of a tree, the angle of elevation to the top of the tree is 53°. Find the height of the tree to the nearest foot. I got 50xtan53 = 66.35 nearest foot ? would I use tan or sin since I'm finding the foot of the tree

**physics**

A 68.0 kg ice skater moving to the right with a velocity of 2.55 m/s throws a 0.16 kg snowball to the right with a velocity of 27.5 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and...

**help**

thank you first answer I got was 32.03

**help**

A salvage ship’s sonar locates wreckage at a 12 degree angle of depression. A diver is lowered 40 meters to the ocean floor. To the nearest meter how far does the diver need to walk along the ocean floor to the wreckage?

**MATH HELP!!!!**

A searchlight located 200 meters from a weather office is shined directly overhead. If the angle of elevation to the spot of light on the clouds is 35°, how high is the cloud ceiling? Round to the nearest hundredth.

**Math**

Let A be an event with probability P(A). If E[(IA) ^36217] = Var[2(IA + 36217)]. Find P(A)

**Social Science**

How to collect the following: sand, iron filings, salt, ethanol and water.

**math**

Carousel Toys has Romper Buckaroos, wooden rocking horses for toddlers, on a 30% markdown sale for $72.09. What was the original price before they were marked down? Round to the nearest cent. $

**world history**

what are some songs about Buddhism? They are needed for a school project.

**physics**

A clerk moves a box of cans down an aisle by pulling on a strap attached to the box. The clerk pulls with a force of 173.0 N at an angle of 31° with the horizontal. The box has a mass of 40 kg, and the coefficient of kinetic friction between the box and the floor is 0.45. ...

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