Sunday

February 26, 2017
Total # Posts: 575

**physics-sound**

A police car moving at 41 m/s is initially behind a truck moving in the same direction at 17 m/s. The natural frequency of the car's siren is 800 Hz. The change in frequency observed by the truck driver as the car overtakes him is __(Hz) Take the speed of sound to be 340m/s.

*February 26, 2017*

**physics**

A person jumps out of a helicopter in mid-air to retrieve a small metal ball. He screams at 475Hz, but people on the ground hear him scream at 578Hz. The person is falling at __(m/s) Once he grabs the metal ball, he is pulled back up to the helicopter at the same speed as he ...

*February 26, 2017*

**Chemistry**

A compressed gas in a cylinder contains 1000.0 g of argon gas. The pressure inside the cylinder is 2050 psi at 18 degrees Celcius. How much gas remains if the pressure is decreased to 650. psi at a temperature of 26 degrees Celcius?

*February 24, 2017*

**Math**

The circumference is 3 inches and the length of tube is 16 inches. The string is wrapped around symmetrically around the tube. What is the length of the string?

*February 13, 2017*

**easy algebra question, check answer**

thank you for actually explaining instead of just giving me the answer, like most people do on here.

*February 10, 2017*

**easy algebra question, check answer**

When multiplying two numbers written in scientific notation, what do you do with the exponents of the 10? a. multiply b. add*** c. subtract d. divide

*February 10, 2017*

**Algebra 1**

is that the answer?

*February 10, 2017*

**Algebra 1**

500637.911743

*February 10, 2017*

**Algebra 1**

Suppose your? friend's parents invest $20,000 in an account paying 5% compounded annually. What will the balance be after 66 ?years?

*February 10, 2017*

**Health**

i would go with 4 as well

*February 10, 2017*

**Algebra 1**

thank you!

*February 8, 2017*

**Algebra 1**

Paul has decided to raise rabbits. He has been warned that the number of rabbits will double every month. He started with 3 rabbits, and the function y=3(2^x) models the number of rabbits he will have after x months. How many rabbits will paul have after 8 months?

*February 8, 2017*

**digital literacy**

a

*February 8, 2017*

**English**

What is the function of the gerund in this sentence Representing the junior class was her job as a memeber of the Student Senate

*February 2, 2017*

**chemistry**

How many grams of MgO are produced during an enthalpy change of -199 kJ? 2 Mg(s) + O2(g) ? 2 MgO(s) ?H = -1204 kJ

*January 30, 2017*

**History**

What did John Brown plan to do with the guns he seized at Harper's Ferry? a. he planned to sell them to make money to support antislavery candidates for Congress. b. he planned to give them to slaves to start slave rebellions. c. He planned to bring them to kansas to fight...

*January 30, 2017*

**Math**

Six groups of students sell 162balloons at the school carnival there are three students in each group if student sells the same number of balloons how many balloons does each to student sell

*January 29, 2017*

**Math**

Comparison of bottles 1/3 and 2/6

*January 29, 2017*

**Physical Education**

5. Select the answer below that best describes how you can increase the intensity of your workout. (1 point) A. exercise more often B. increase the speed of a run, amount of weight lifted, or distance a muscle is stretched C. Increase the length of time of each training ...

*January 27, 2017*

**Algebra 1**

thank you bob, you were correct

*January 25, 2017*

**Algebra 1**

what do you mean?

*January 25, 2017*

**Algebra 1**

Suppose the growth of a population (in thousands) is represented by the expression 32*2.1^x, where x represents the number of years since 2010. Evaluate the expression for the year 2015. Round to the nearest whole number. a. 41 b. 1,307 c. 67 d. 622

*January 25, 2017*

**Algebra**

okay thanks

*January 20, 2017*

**Algebra**

There is also a graph that goes down in a straight line. It starts at 40 on the y axis and 20 on the x axis. i would link the picture but jiskha wont let me.

*January 20, 2017*

**Algebra**

On a given day, a vendor made less than $40 from hot dog and pretzel sales. The inequality graphed below represents the number of hot dogs (x) and pretzels (y) he could have sold and made less than $40. Which combination of hot dogs and pretzels could the vendor have sold that...

*January 20, 2017*

**Geometry**

right triangle ABC B is vertex with right angle <A=30 <C=60 AB= square root of 3 (cm) what is BC and AC

*January 19, 2017*

**Algebra**

would it be d?

*January 19, 2017*

**Algebra**

The jaguars basketball team was down 21 points at halftime. In the second half, they started to catch up at a rate of 2 points per minute. The inequality below can be solved to determine the number of minutes it took the jaguars to take the lead. -21+2m>0 what is the ...

*January 19, 2017*

**Algebra**

thank you!

*January 19, 2017*

**Algebra**

If the roots of a quadratic equation are -2 and 3, the equation can be written as a.(x+2)(x+3)=0 b.(x-2)(x+3)=0 c.(x+2)(x-3)=0 d.(x-2)(x-3)=0

*January 19, 2017*

**English**

Is the sentence "They perform many tasks" transitive

*January 17, 2017*

**Algebra**

it doesnt tell me the points at which the graph is. I'm glad I'm not the only one who thinks that its dumb but its for a midterm and I have to do good. Can you just guess a random letter? lol

*January 11, 2017*

**Algebra**

Shirts with the a school's mascot were printed, and the table shows the number of people who bought them the first, second, third, and fourth weeks after their release. Which graph could represent the data shown in the table? Weeks | Number of sales 1 |22 2 |50 3 |62 4 |75...

*January 11, 2017*

**math**

Gwen needs to add 2/3 of a cup of flour to a recipe. She only has a 1/3-cup measure. How many scoops of flour does Gwen need to add?

*December 29, 2016*

**Riddle**

You have 24 hours to answer this riddle.There was a man who walked down the road. He noticed a child crying, he walked up to the child and whispered into her hear. The child smiled, said thank you ... and left. My question is What is in the fourth drawer next to my bed? Any ...

*December 20, 2016*

**SS HELP MEEEE PLEASEEE**

13. how did the embargo act of 1807 affect south carolina? a. it hurt the sale of the planters' rice and cotton b. it hurt the planters who needed british manufactured goods c. it hurt the aristocrats who could not longer send their sons to school in england d. it hurt the...

*December 12, 2016*

**social studies help pls**

my textbook is in the mail on the way but i don't have it right now.

*December 12, 2016*

**social studies help pls**

13. how did the embargo act of 1807 affect south carolina? a. it hurt the sale of the planters' rice and cotton b. it hurt the planters who needed british manufactured goods c. it hurt the aristocrats who could not longer send their sons to school in england d. it hurt the...

*December 12, 2016*

**SC state history**

note: not all letters will be used. a. sectionalism b. missouri compromise c. andrew jackson d. john c. calhoun e. articles of confederation f. cabinet g. tariff h. treason i. daniel webster j. louisiana purchase k. nationalism l. thomas jefferson 1. the first constitution of ...

*December 12, 2016*

**ELA**

Si it C or D??

*December 7, 2016*

**Math**

Two picture frames are similar. The ratio of the perimeters of the two pieces is 3:5. If the area of the smaller frame is 108 square inches. what is the area of the larger frame?

*December 1, 2016*

**Mathmatics Asap Please!!!!!**

Thank you so much.

*November 29, 2016*

**Mathmatics Asap Please!!!!!**

Susanna is going to make some concrete, using cement, sand and gravel, in the ratio 1:3:3. Nicola wants to make 245kg of concrete. There is 40kg of cement, 110kg sand and 105kg gravel. Is there enough material to make concrete. Thank you.

*November 29, 2016*

**Math algebra**

As of 2012, the movies with the highest worldwide box-office sales are Avatar, Titanic, and The Avengers. The total box-office sales for all three movies were $6.5 billion. The box-office sales for Avatar were $0.2 billion less than twice the box-office sales for The Avengers...

*November 17, 2016*

**ENGLISH HELP PLS**

Identify the choice that best describes the sentence. 5. More than 1,000 years passed before Copernicus proposed that the earth orbited the sun. (1 point) a. simple*** b. compound c. complex d. compound-complex *** = my answer

*November 14, 2016*

**algera help plzzzz**

idk how to add an attachment but basically there are 3 different diagrams of pentagons. diagram one has just one pentagon with 3 on each side. diagram two is two pentagons attached together by a side ( they don't have the 3's ). diagram three has three pentagons ...

*November 1, 2016*

**algera help plzzzz**

In the diagramâ€‹ below, what is the relationship between the number of pentagons and the perimeter of the figure theyâ€‹ form? Represent this relationship using aâ€‹ table, words, anâ€‹ equation, and a graph. Let...

*November 1, 2016*

**Algebra**

One number is three times the another number. If both numbers are positive and their product is 27, find the numbers

*October 26, 2016*

**Maths**

Were do the brackets go to make this equation true. 23+4=10🤓

*October 18, 2016*

**Math**

If kelly has a blue shirt, a red shirt, an yellow shirt an only one pair of jeans. If kelly wears one shirt at a time, how many outfits does she have

*October 4, 2016*

**Math**

If a red light flashes every 3 seconds, a blue light flashes every 4 seconds and a blue light flashes every 5 seconds and they all flashed together at midnight when would be the next time they all flash together?

*September 30, 2016*

**Math**

What is the 9th multiple of 100

*September 29, 2016*

**honors algebra 1**

3. Which ordered pair is a solution of the equation y=x-4? a. (2,6) b. (6,2) c. (-2,6) d. (3,1) 4. Which ordered pair is a solution of the equation y=5x? a. (-2,10) b. (-5, 25) c. (-3,15) d. (-2, -10) 5. Which ordered pair is a solution of the equation y=-5x+4? a. (2,14) b. (5...

*September 22, 2016*

**Math**

If my clothes are like this the hundred digit is greater than 7 the tens is one more than the hundreds digit and the ones digit is less than 2 then what would my answer be

*September 19, 2016*

**SC State History**

A piece of decorated pottery from the Woodland Era is considered a(n)... a. fossil b. artifact c. hieroglyph d. chert I know its either a or b but i'm not sure which. The culture of American Indians in South Carolina during the pre-projectile Point era was based on... a. ...

*September 15, 2016*

**Math**

The angle of elevation to the top of a tower is 27 degrees, taken from a point 19 meters from the base of the tower. How high is the tower?

*September 12, 2016*

**History**

He united twelve tribes under one king.

*September 11, 2016*

**Physics**

If a basketball player has a vertical leap of 1.29 m , then what is his takeoff speed and his hang time ( total time to move upwards to the peak and then return to the ground ) ?

*September 9, 2016*

**math**

what is 0.31+1/5=?

*September 1, 2016*

**One more thing!**

Day had broken cold and gray, exceedingly cold and gray, when the man turned aside from the main Yukon trail and climbed the high earth-bank, where a dim and little traveled trail led eastward through the fat spruce timberland. It was a steep bank, and he paused for breath at ...

*August 30, 2016*

**Check answer for la please!!**

In which sentence is the word periscope used correctly? A. Excited about her finding, the scientist used a periscope to view the organisms in the water sample. B. On the night of the full moon, we used the periscope to look at the sky. C. Sitting behind the tall stone walls, ...

*August 29, 2016*

**Maths**

Which fraction is the largest 3/4, 31/50 or 17/40

*July 3, 2016*

**science**

Between a 700kg elephant moving at a velocity of 18km/h East and a 74kg cheeetah moving at 31m/s East. Which is more difficult to stop? Why?

*June 21, 2016*

**Math**

A rock falls straight down from a height of 10 m. How long will it take the rock to hit the ground?

*May 24, 2016*

**Geometry**

A trapezoid has an area of 220m^2, a height of 11m, and one base is 13m. Find the other base.

*May 10, 2016*

**math**

a picture with 4 right angles 4 sides an 2 pairs opposite what quadrilateral is this

*May 9, 2016*

**Geography can someone please help me NOT ms.sue**

No

*May 6, 2016*

**Geography can someone please help me NOT ms.sue**

Your in the 7th grade?

*May 6, 2016*

**Geography can someone please help me NOT ms.sue**

How old are u dummy?

*May 6, 2016*

**Geography can someone please help me NOT ms.sue**

FOR the assignment I have to write why it was unfair to the colonist politically, economically, and social reasons

*May 6, 2016*

**Geography can someone please help me NOT ms.sue**

I done that I cant find it

*May 6, 2016*

**Geography can someone please help me NOT ms.sue**

I meant colonists

*May 6, 2016*

**Geography can someone please help me NOT ms.sue**

What are the political, economic,and social reasons why the stamp act was not fair to the colonist?

*May 6, 2016*

**Language arts, please help!**

Thank you! :) That's all I need. My mom helped me on 2.

*May 3, 2016*

**Language arts, please help!**

Is 5 c?

*May 3, 2016*

**Language arts, please help!**

1. What purpose might you set for reading the list of characters in A Surprising Point of View? A. to complete a task B. to make a decision C. to gain understanding *** D. to be inspired 2. If you were adjusting your reading rate to suit your purpose, how would you read lines ...

*May 3, 2016*

**Language arts, please help!**

A Surprising Point of View: A Television Play in Two Acts Characters: (in order of appearance) 1. JASON: a boy of about 14. He is a student in Ms. Smith’s English class. He regularly misbehaves in order to get attention, and he doesn’t apply himself to his schoolwork...

*May 3, 2016*

**Anyone? Please?**

I just need someone to check them. :(

*May 3, 2016*

**Language arts, huge favor**

1. What purpose might you set for reading the list of characters in A Surprising Point of View? A. to complete a task B. to make a decision C. to gain understanding *** D. to be inspired 2. If you were adjusting your reading rate to suit your purpose, how would you read lines ...

*May 3, 2016*

**Language arts, huge favor**

A Surprising Point of View: A Television Play in Two Acts Characters: (in order of appearance) 1. JASON: a boy of about 14. He is a student in Ms. Smith’s English class. He regularly misbehaves in order to get attention, and he doesn’t apply himself to his schoolwork...

*May 3, 2016*

**Plz do help..GEOMETRIC SEQUENCES**

let the beginning of year 1 = B1 (the first year after she earned 32000) B1 = 32000 x 1.04 B2 = (32000 x 1.04) x 1.04 = 32000 x 1.04^2 B3 = (32000 x 1.04^2) x 1.04 = 32000 x 1.04^3 Bn = 32000 x 1.04^n

*April 28, 2016*

**Math**

Walking along two of its adjacent sides: 24 + 18 = 42cm Draw the diagonal (to form two triangles). Find the hypotenuse of one of the triangles to find the diagonal. Use pythagoras theorem: c = sqrt[a^2 + b^2] = sqrt[24^2 + 18^2] = 30cm Therefore, it is 12cm shorter to walk ...

*April 28, 2016*

**maths**

I think 18 works. (18/2)^2 = 81

*April 28, 2016*

**maths**

Let Kate = k, let her son = s k - 5 = 5(s - 5) (You have to take 5 years from both their ages) k = 5s - 20 (1) k + 5 = 3(s + 5) - 8 k = 3s + 2 (2) sub (2) into (1) 5s - 20 = 3s + 2 2s = 22 s = 11 sub into (1) k = 5 x 11 - 20 k = 35

*April 28, 2016*

**Math**

Ethan had $12 more than Dakota. Ethan then gave 1/3 of his money to Dakota. The ratio of money Ethan had to the amount of money Dakota had then became 5:7. How much money did Ethan give to Dakota?

*April 27, 2016*

**math**

5^2 = 25 sqrt 25 = 5 Therefore, option 3

*April 23, 2016*

**Maths**

the length of the arc of a sector is given by the radius times the angle bisected at the centre. l = 14 x 45 = 630cm Then you just add twice the radius (the two sides of the sector) The perimeter = 360 + 14 + 14 = 388 cm I don't believe you need to use pi in this question.

*April 23, 2016*

**Math**

You need to get a common base. In this question, your bases are 36, 6, 6. Use a base of 6 (and hence change 36 to 6). 36 = 6^2 36^5x = 6^2(5x) = 6^10x Your equation now is: 6^10x = 6^(x+x-2) INDEX LAWS Since we have the same base, the powers must be equal: 10x = x+x-2 8x = -2 ...

*April 23, 2016*

**Maths**

I feel like this question might be missing some vital information. Is this a 3D trigonometry question? If so, I'm not sure it can be solved without being given an additional length or some bearings/elevation angles.

*April 23, 2016*

**Math**

To find the capacity (amount of water), you must first find the volume. This prism is a cylinder (since it has a circular base). Find radius: Circumference = 2πr r = C/2π = 16/2π = 8/π feet (= 2.55) Find volume: Volume = Area x height = πr^2 x h = &#...

*April 23, 2016*

**Mathematics**

Don't worry, I've got it. I used the substitution u = 1 + lnx and got the answer

*April 23, 2016*

**Mathematics**

Find using substitution: ∫ 1/[x(1+lnx)^2] dx I'm not sure what substitution to use.

*April 23, 2016*

**Algebra**

If this is a multiple choice question, can't you just test each? e.g. for (A): -160 x -2 = 320 Therefore, the answer is "multiply the previous term by -2" To check that the rest are incorrect: for (B): -160 /2 ≠ 320 for (C): -160 - 60 ≠ 320 for (D): -...

*April 23, 2016*

**lambton**

The acceleration is centripetal (circular): a = velocity^2 /radius (formula) = 240^2 /24 = 2400 rad/s^2 Linear velocity is calculated using the formula v = u + at. That is: final velocity = initial velocity + acceleration x time linear velocity = 0 (since at rest) + 2400 x 15...

*April 22, 2016*

**Math**

f(x) = 3x + 5 f(x) = 6x^2 + 1 g(x) = 22 - 8x^3 H(x) = 14x^2 + 52x^3 - 8√x It can really be any algebraic expression. A function is defined as "a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output." For ...

*April 22, 2016*

**cal**

You haven't actually posted a question. What are you differentiating?

*April 22, 2016*

**MATH**

I'm not sure how you found the length given only the height and width. Why divide by 4? Were you also given the volume?

*April 22, 2016*

**Mathematics**

I've just found that integration formula (which I'd forgotten about). No wonder I kept getting stuck! Thank you.

*April 22, 2016*

**Mathematics**

Find, using substitution, the integral of: e^x /sqrt[e^(2x) -1] dx

*April 22, 2016*

**Math**

x-2 ≥ 3 (+2 to each side) x ≥ 5 since p = x-2, p will always be positive (lowest value of x is 5, which would make p = 5-2 = 3, i.e. positive)

*April 22, 2016*