# Posts by lily

Total # Posts: 1,561

**physics**

A box is pushed along a surface with constant horizontal force. The surface is frictionless. The box starts from rest and travels 6.0m in 2.0s. if the experiment is repeated but with the box's mass doubled, how far will it travel?

**physics/calculus**

can someone explain to me why the derivative and second derivative of this position vector r=ax+bty is r'=ax' +by'+ bty' ( why is there a by'...?) and r''=ax'' + cy' +cy' +cty'' ( why is there 2 cy' 's?

**math**

a. 128 b.8 square root 2 c.16 square root 2 d.16

**math**

In ?DEF, DF=16 and m?F=45. Find the length of a leg. Leave your answer in simplest form.?

**physics**

where did the 45 come from ?

**physics**

Suppose an airplane is flying in air with a speed of u=100m/s . The wind is from the south west with a velocity of v= 70m/s what direction should the airplane head in order to fly directly north ( with respect to the ground)? Give the angle in degrees of west of north what is ...

**Math 4th grade**

I need help on how to work this problem out. I need step by step please. This is the word problem: On Monday, I rode 9 miles. On Sunday, I rode 4 fewer days than on Monday. On Tuesday I rode 2 times farther than Sunday. How far did I ride on those 3 days?

**Honors Algebra**

A biologist is researching a newly discovered species of bacteria. At time t=0 hours, she puts on hundred bacteria into a Petri dish. Six hours later, she measures 450 bacteria. Assuming exponential growth, what is the growth rate "k" for the bacteria? (Round your ...

**science**

2. Compare and contrast deductive reasoning and inductive reasoning. Based on the information given here, answer the following questions about the experiment: • What are the qualities of deductive reasoning? • What are the qualities of inductive reasoning? • ...

**history**

thank you

**history**

oh,she also had the right to become independent and rule her own land of Aquitiane

**history**

Queen Eleanor was justified in helping her sons rebel against their father because,she had enough of his affairs, disagree with most of decisions and she helped her sons fight for what they deserve. Is this ok?

**history**

How was Queen Eleanor justified in helping her sons rebel against their father?

**History**

King Louis was more connected to the church as he couldn't bear being excommunicated and killing so many people therefore he fell into a spiritual crisis. However Eleanor was not as connected to the church as when she found out that her husband was excommunicated she found...

**History**

Both Eleanor and Louis were to closely related for the church to tolerate

**Science**

car 1 is moving at 10 m/s and hits car 2 if they have a perfectly elastic collision and the masses are 1700 kg and 3000kg respectively what is the final velocity of the second car ?

**Math**

You roll two fair dice. Let E be the event that an even total shows on the dice. Let F be the event that a six shows on at least one of the dice. Find P(F) and P(F|E). Choices: P(F)=1/3; P(F|E)=1/13 P(F)=1/3; P(F|E)=5/18 P(F)=11/36; P(F|E)=7/18 P(F)=11/36; P(F|E)=5/18? Would ...

**math**

The sum of two numbers is equal to 495. The last digit of one of them is zero. If you cross the zero off the first number you will get the second. What are the numbers?

**english**

each rhyme is made up of one possessive noun and one plural noun. Write the answer to each riddle

**Math NEED HELP URGENT**

At noon, Professor Simon has a petri dish with 10,000 cells of Bacteria A. In another petri dish, he has 33,000 cells of Bacteria B. Every hour, Bacteria A grows by 8%. Every hour Bacteria B cells die off, decreasing the number of cells by 6%. After how many hours will there ...

**Math- PLEASE HELP!!**

Please? Anyone? I'm really stuck :(

**Math- PLEASE HELP!!**

At noon, Professor Simon has a petri dish with 10,000 cells of Bacteria A. In another petri dish, he has 33,000 cells of Bacteria B. Every hour, Bacteria A grows by 8%. Every hour Bacteria B cells die off, decreasing the number of cells by 6%. After how many hours will there ...

**Algebra **

At noon, Professor Simon has a petri dish with 10,000 cells of Bacteria A. In another petri dish, he has 33,000 cells of Bacteria B. Every hour, Bacteria A grows by 8%. Every hour Bacteria B cells die off, decreasing the number of cells by 6%. After how many hours will there ...

**physics**

Considering the factors that affect gravitational pull, in which location would the gravitational pull from the earth be SMALLEST on you? A) visiting friends at the beach B) visiting Santa on the second floor of the mall C) visiting Uncle Chrissy in the Himalayan Mountains D) ...

**Science**

What abiotic and biotic factors might limit population size and mono lake?

**Advanced Functions**

wait but why did reiny write 20 mins for the period?

**Advanced Functions**

Opss i didnt read that, i just refreshed the page! okok, so reiny did it in secs. but for cosine equation would it be 8 cos (pi/10) +9 or different

**Advanced Functions**

oh okay thank you makes sense now! would it just be 8 cos (pi/10) +9 for the cosine equation? and what would the period be in seconds? and would that effect the question? cause the next question what is her height after 25 secs

**Advanced Functions**

period 1/3 = 0.333 (1 revolution per a min) k=2pi/1/3 = 6 pi isnt that the k value why would it be 1/10 pi

**Advanced Functions**

PLEASE READ THE BOTTOM I ADDED ON!! :) the ferris wheel at an amusement park measures 16m in diameter. the wheel does 3 rotations every minute. the bottom of the wheel is 1m above the ground... a) determine the simplest equation that models Megan's height above that ground...

**Advanced Functions**

h = 8 sin [?/10(t-5) ] + 9 covert to cosine??

**Advanced Functions**

the ferris wheel at an amusement park measures 16m in diameter. the wheel does 3 rotations every minute. the bottom of the wheel is 1m above the ground... a) determine the simplest equation that models Megan's height above that ground(h) over time (t). give 2 more ...

**english help asap**

i think d

**english help asap**

Senator Warren states that women are "ready to fight back" against unequal pay. Is this a valid argument supported by accurate evidence? A.No; Warren weakens her point by noting that "Today, more young women go to college than men." B.Yes; Warren supports ...

**Chemistry**

The reaction of nitrogen dioxide with fluorine generates nitryl fluoride: 2NO2(g) + F2(g) --> 2NO2F(g) To determine the rate law for this reaction, a chemist performed several initial-rate experiments using different initial concentration, with the details tabulated below. ...

**math help quick please**

thank u -7 was the right answer

**math help quick please**

thank u soo much

**math help quick please**

so the answer for x is 2,-7

**math plzzz help quick**

yes i know how to say please but plzz is another short way for please

**math plzzz help quick**

really appreaciate it

**math plzzz help quick**

thank u alot

**math plzzz help quick**

ok thank u so much

**math help quick please**

soo b

**math help quick please**

solve {y=x-7 {5x+2y=7 Use the substitution method. A.(0, ?7) B.(7, 0) C.(3, ?4) D.(?1, ?8)

**math plzzz help quick**

thank u so much damon

**math plzzz help quick**

well its a short way to say please

**math plzzz help quick**

What is the y-coordinate of the solution of the system of equations? {y=2x+14 {-4x-y=4 Enter your answer in the box. y =

**math**

The radius of a circle is 17 feet. Using the formula A = r2, what is the area of the circle? Use 3.14 for pi.

**math plzzz help quick**

so y=5

**math plzzz help quick**

What is the y-coordinate of the solution for the system of equations? {x-y=-11 {y+7=-2x Enter your answer in the box. y =

**Math**

Suppose the P(A) = 1/6 . Find the odds in favor of A . Would you explain the step by step process? thanks!

**History**

What is an example of internal sovereignty? Would the Third Reich and the SS be considered an example? thank you!

**maths**

The first term of a geometric sequence is 31(1/4),the last term is 2 and the sum of the associated series is 50(3/4).what is the common ratio and how many terms are there in the series?

**math**

find each product mentally 6*4.4

**math**

thank yo

**math**

find each product mentally.12*4 3/4

**Math**

if two fair dice are rolled what is the probability that the total showing is more than four? Will you please explain how to do this problem? Thank you

**Math**

What is my number? 1.My number is a perfect square 2.The only prime number in it's prime factorization is 2 3.My number is a factor of 32 4. The sum of it's digits is odd.

**Math**

What is a quadrilateral that has a 90* angle another 90* angle, a 125*angle, and a 55*angle

**Language arts 7**

Joe magarac, Man of steel 8. In section 1, what does the author mean when he says joe magarac is a folk hero? A. Joe was a real man who spent his whole life in the steel mills of Pittsburgh. B. Joe was a mysterious figure who vanished without a trace. C. Joe was a legend ...

**Language arts Correct my answer**

The salesperson ignored Lisa. He was helping an older customer. Which sentence best combines the two sentences using a participial phrase? A. Lisa was ignored by the salesperson as he helped an older customer B. An older customer was being helped by the salesperson so he ...

**Math correct me**

5.The sales tax rate 6.3%. a. find the tax paid for a pair of earrings with a list price of $77 b. what is the total cost of the pair of earrings? $4.85;$77.79 $4.85;$81.85 ••• $0.49;$77.49 $0.49;$81.85

**language**

1 and 4 are right but 2 and 3 are wrong. CORRECT ANSWERS ARE BELOW. Trust me. 1. B 2. D 3. C 4. B

**Social Studies**

I think I understand a little better now (thanks for your help Ms. Sue and Damon) Sectionalism: Sectionalism divided the north and south because of their beliefs on slavery Slavery: The northerners were against slavery; the southerners wanted it. States rights: The northerners...

**Social Studies**

what is the connection among sectionalism, slavery, and states rights as causes of the Civil War? How did the southern response to the 1860 election results demonstrate this connection? Could someone help me with this and explain it?

**Chemistry**

Hydrogen gas is used for many purposes, including the hydrogenation of vegetable oils to make margarine. The most common industrial process for producing hydrogen is "steam reforming", in which methane gas, CH4, from natural gas reacts with water vapor to form carbon...

**Chemistry**

An antacid contains 200mg of aluminum hydroxide and 200 mg of magnesium hydroxide per capsule. How many moles of aluminum hydroxide does each capsule contain? What is the mass in milligrams of 0.0734 mole of magnesium hydroxide?

**university physics**

A 5.20 g pellet is shot horizontally from a BB gun at a speed of 29.1 m/s into a 20.8 g wooden block. The wooden block is attached to a spring and lies on a frictionless table. If the collision is inelastic and the spring constant k = 22.0 N/m, what is the maximum compression ...

**Chemistry**

One third of vanilla ice cream provides about 145 kcal of energy. A typical adult uses about 195 kcal/hr of energy while walking. If all of the energy in one third of a cup of vanilla ice cream were to be burned off by walking, how many minutes would it take for this energy to...

**Chemistry**

This compound has a molecular mass of 1268.06g/mol, what is the molecular formula for this compound?

**physics**

if a swimmer can swim in still water at a speed of 7.3 m/s and he intends to swim across a river that has a downstream current of 2.5 m/s what is the swimmers direction?

**math**

well tbh im just guessing because i dont really get it

**math**

and i think its Ricardo is that right??

**math**

sorry instead of square root 37 i meant to put square root 54

**math**

Four students work to find an estimate for square root 37. Who is closest to finding the true estimate? (1 point) Rhonda: "Use square root 16 and square root 25 to estimate." Ricardo: it should be between square root 25 and square root 36." Riley: "i use ...

**math**

Four students work to find an estimate for square root 54. Who is closest to finding the true estimate? (1 point) Rhonda: "Use square root 16 and square root 25 to estimate." Ricardo: "I use square root 25 and square root 36." Riley: "It should be ...

**Math HELP!!**

Chuck needs to cut a piece of cardboard for an art project at school. He has four pieces of cardboard that he can cut from: 6 inches, 5 inches, 7 inches, and 3 inches. If the length of the cardboard he needs is ?35 inches, which piece of cardboard should he cut to create the ...

**7th American History**

1.B 2.A 3.C 4.C 5.C 6.D The answers

**Math**

Use your fraction strips to locate and label these numbers on a number line:0,fraction of 3 fourths and 7 eighths. Then use your fraction strips to measure the distance between 3 fourths and 7 eights

**Physics**

A football quarterback shows off his skill by throwing a pass 45.90 m downfield and into a bucket. The quarterback consistently launches the ball at 40.00 ∘ above horizontal, and the bucket is placed at the same level from which the ball is thrown. What initial speed is ...

**SS**

ewegjodgjlk is correct! Thank you!

**Physics**

Maya follows a maze by going: 3 m north, 2 m west, 1 m south, 1 m west, 2 m north, 6 m east, and 2 m north. What is her final displacement in a north/south direction.

**algebra**

Since an ordered pair is organized as (x,y) just plug in the value for x and see if it matches up with the y it's paired with.

**math**

I would recommend creating some equations. So... represent one of the people's ages with x and another person's with why and convert the statements of twice and the sum of their ages to different mathematical operations like multiplication or addition. So Kristen start...

**Government**

1. A: Athens was a direct democracy in which citizens voted on laws themselves 2. C: Separation of power 3. C: The relationship between the executive and legislative branches 4. B: Maintaining national armed forces 5. B: By violating the social contract with colonists, the ...

**Social studies**

which of the following were effects of pizarro and cortes defeat of native americans Settlement and colonization of Florida under Spanish rule Inspiration for other Europeans to being explanations and settlement •• Settlement and colonization in the southwest under ...

**Social studies**

what was a common theme shared by the mayan and aztec civilizations? The tardes fue with dutch And french They were both interested in astronomy They shared similar marriage customs•• They were nomadic and traveled in clans

**Check my answers in history PLZ**

9 is B and D

**social studies (check my answers )**

Answers are: A, D, and A Just took it and got 100%

**7th grade Math (Ms. Sue)**

Forgot to put my name sorry lol.

**7th grade Math (Ms. Sue)**

For questions 2 and 3, order the numbers in each list from least to greatest. 2. -5, -7, 0, -1 A. 0, -1, -5, -7 B. -1, -5, -7, 0 C. -7, -1, -5, 0 D. -7, -5, -1, 0 3. 0, [-14], 13, -12, [-16], 17 A. -16, -14, 13, -12, 0, 17 B. -12, 0, 13, 14, 16, 17 C. -12, -14, -16, 0, 13, 17 ...

**7th grade Math**

Could you help me with a few more? I'd like to WORK them out, and not just get the answers.

**7th grade Math**

Which of the following is a true statement? A. -8 > -6 B. 10 < -12 C. -5 > -7 D. -9 >6 This is integers, and I'm stumped. Please help! Thanks.

**Chemistry(please check my answer)**

You're welcome. :)

**Chemistry(please check my answer)**

Correct.

**Health**

If you are from connections academy, it is C. But in the future you should read your lesson, because they won't ask you a question that they don't cover in the lesson. Lily

**Basic Math**

How many different four-digit numbers can you form using the digits 1, 2, 3, 5, 6, 7, and 9 with repetition allowed? Would the answer be, 7*7*7*7? Thanks

**History**

In all English colonies a white man could vote only if he was a Christian Property owner•• Church goer Member of the gentry

**History**

What was the reason Columbus sailed to the Americans? He wanted to find riches He wanted to prove that the world was round He wanted to prove his seamanship •• He wanted to see India

**Reading and language**

I re read them and I think it's 1b 2 a