# Posts by Helen

Total # Posts: 522

**Physics**

A 71 kg skydiver jumps out of a plane at an altitude of 1370m. She reaches terminal velocity of 68m/s. She opens the parachute at an altitude of 328m, and lands with a speed of 2.8m/s. a)How much (negative) work is done by air resistance before she opens the chute? b)How much ...

*February 20, 2017*

**math**

Describe the points on the earth’s surface that are visible to a viewer who is 100 miles above the North Pole. Would it be half of the surface area of Earth?

*January 31, 2017*

**Algebra **

(-11x to the 5th power +4x + 8x to the 3rd power)+(-13x-2+7x to the 3rd power)

*January 18, 2017*

**Algebra 2**

Simplify, (2 sqrt3x^5 - 2sqrt y)^2

*January 17, 2017*

**Algebra 2**

Write as a sqrt, 2^3/2 x^3/2 y^5/2

*January 17, 2017*

**Language Arts**

Ty

*November 28, 2016*

**Language Arts**

1.)Knowing that the Latin root -equi- means "equal," choose the best meaning for the word equilateral as it is used in the sentence below. The box appears to be square, but I would have to measure its sides to prove that it is equilateral. A. equally distributed B. ...

*November 28, 2016*

**Math**

If Donna uses 4 1/2 meters of fabric, what is the total length of the pieces of fabric left? Thank you

*October 6, 2016*

**Algebra**

The Patterson family and the bell family each used their sprinklers last summer. The wayer output rate for the patterson family's sprinkler was 25 L per hour. The water output rate for the bell family's speinkler was 15 L per hour. The familiez used their sprinklers ...

*July 26, 2016*

**Physics**

A light, rigid rod 1.039m in length joins two particles with masses 3.65kg and 4.94kg at its ends. The combination rotates in the xy plane about a pivot through the centre of the rod. Determine the angular momentum of the system about the origin when the speed of each particle...

*July 5, 2016*

**math**

the average age of a family of eight is 30 year .the average age of the children in the family is 19years .if the mother is four years younger than the father ,calculate the age of the father

*June 26, 2016*

**math**

a man spent 1/4 of his monthly salary on rent ,2/5 on food and 1/6 on books. If he still had ghana 55000 left what was his monthly salary

*June 26, 2016*

**Math**

So are there infinite solutions?

*May 23, 2016*

**Math**

How many solution are there in the following system of equations? x=-6y+4 2x+12y=8 Please help me and explain it to me! I would really appreciate if you guys answered it!

*May 23, 2016*

**Reading**

The West Wind It’s a warm wind, the west wind, full of birds’ cries; I never hear the west wind but tears are in my eyes. For it comes from the west lands, the old brown hills, And April’s in the west wind, and daffodils. It’s a fine land, the west land, ...

*May 11, 2016*

**Math**

Determine whether the statement is true or false. Explain. "The median divides the box of a box-and-whisker plot in half." I think it is true but I can't think of an explanation.

*May 3, 2016*

**Geometry**

A square pyramid has a surface area of 175 square inches. The square base has side lengths of 5 inches. Find the slant height of the pyramid.

*April 6, 2016*

**Math**

A company will make a cereal box with whole number dimensions and a volume of 100 cubic centimeters. If cardboard costs $0.05 per 100 square centimeters, what is the least cost to make 100 boxes? (Please help me!!)

*April 5, 2016*

**Math**

A company will make a cereal box with whole number dimensions and a volume of 100 cubic centimeters. If cardboard costs $0.05 per 100 square centimeters, what is the least cost to make 100 boxes? Please help me, I have no clue how to solve.

*April 5, 2016*

**Math**

Please help me. This is the second time posting it after waiting for several hours.

*April 3, 2016*

**Math**

Explain how you could find the volume of a pyramid given a prism with the same base are and height. Justify your answe

*April 3, 2016*

**Math**

Explain how you could find the volume of a pyramid given a prism with the same base are and height. Justify your answer.

*April 3, 2016*

**Math**

Thanks!

*April 3, 2016*

**Math**

What fraction of the volume of the rectangular prism is the volume of the rectangular pyramid?

*April 3, 2016*

**Math**

Suppose Cylinder A has the same height but twice the radius of Cylinder B. What is the ratio of the volume of Cylinder B to Cylinder A?

*March 30, 2016*

**Math**

How does changing the dimensions of a cylinder affect the cylinder's volume?

*March 30, 2016*

**Reading**

Of all the gods and goddesses of Olympus, perhaps none was loved by humans as much as Demeter. Demeter was the goddess of the soil and of the crops, to which she tended with great care all through the year. Demeter enjoyed her duties because she cared for mortals and wanted to...

*March 16, 2016*

**Reading**

Please help and check my work! By the way, #1 is actually D.

*March 16, 2016*

**Reading**

Of all the gods and goddesses of Olympus, perhaps none was loved by humans as much as Demeter. Demeter was the goddess of the soil and of the crops, to which she tended with great care all through the year. Demeter enjoyed her duties because she cared for mortals and wanted to...

*March 16, 2016*

**Reading**

Of all the gods and goddesses of Olympus, perhaps none was loved by humans as much as Demeter. Demeter was the goddess of the soil and of the crops, to which she tended with great care all through the year. Demeter enjoyed her duties because she cared for mortals and wanted to...

*March 16, 2016*

**Reading**

1 is D.

*March 16, 2016*

**Reading**

Is the answer to #1 A?

*March 16, 2016*

**Reading**

Of all the gods and goddesses of Olympus, perhaps none was loved by humans as much as Demeter. Demeter was the goddess of the soil and of the crops, to which she tended with great care all through the year. Demeter enjoyed her duties because she cared for mortals and wanted to...

*March 16, 2016*

**Reading**

Please Check!

*March 16, 2016*

**Reading**

Of all the gods and goddesses of Olympus, perhaps none was loved by humans as much as Demeter. Demeter was the goddess of the soil and of the crops, to which she tended with great care all through the year. Demeter enjoyed her duties because she cared for mortals and wanted to...

*March 16, 2016*

**chemistry**

a 500ml stock solution of NAOH has a purity of 70% and a density of 1.9g/ml. calculate the concentration that would be in a 1L solution. calculate the molarity. What volume would we have to take to prepare 250ml of a solution of 0.1 mol/l

*March 12, 2016*

**Math**

Angles K and O are supplementary. If measurement angle K= 3x+10 and measurement angle O= 10x-12, find the measure of each angle. I don't understand how to solve.

*March 7, 2016*

**Math**

thanks

*March 7, 2016*

**Math**

The statement is "An obtuse angle and an acute angle are always supplementary."

*March 7, 2016*

**Math**

Determine whether the statement is true or false. If the statement is true of false explain why. Can you please help?

*March 7, 2016*

**Math**

so is it 1/6*1038?

*March 6, 2016*

**Math**

Susan tossed a die 1,038 times. Which of the following would be a good estimate of the number of times she got the number 3 on the die? A: 186 B: 128 C: 306 D: 273 Can someone please help and explain this to me?

*March 6, 2016*

**English**

Colon

*March 1, 2016*

**Math**

Explain what happens to the volume of a prism when its dimensions are tripled. Answer: Is the volume going to be 9 times larger

*February 24, 2016*

**Math**

How does changing the dimensions of a figure affect its perimeter? area?

*February 21, 2016*

**Chemisty**

Find the mass in grams of 2 x 10^23 of F2 (12.6 grams of F2)

*February 17, 2016*

**Math Scale Drawing**

The length of a classroom is 30 ft. What is the scale factor if the length of the classroom on the scale drawing is 3.6 inches?

*February 10, 2016*

**Math**

The length of a classroom is 30 ft. What is the scale factor if the length of the classroom on the scale drawing is 3.6 inches?

*February 10, 2016*

**Math**

The length of one side of the school building is 100 feet. if you use a scale factor of 1:250, what is the length of your scale drawing? Please help me and explain how you get your answer!

*February 10, 2016*

**Reading**

Ernest Hemingway's first job was as a newspaper writer in Kansas, at the age of 17. He wrote about everything that happened at the local police station, the train station, and the hospital. Hemingway worked for the newspaper for six months. The Red Cross then hired him to ...

*February 2, 2016*

**Reading**

Is #1 A or D?

*February 2, 2016*

**Reading**

His first fight was for his health and vigor. It all began at the age of nine. As a child, he was weak and thin because of his asthma. His father, the first Theodore, motivated him to fight his ill health. On the third floor of the house in New York where he was born, his ...

*February 2, 2016*

**Math**

oh Latonia has the greater percent

*January 26, 2016*

**Math**

Both are 36

*January 26, 2016*

**Math**

The chart shows the total number of students in two school orchestras and the number of students in each orchestra who play string instruments. Which orchestra has the greater percent of its members as string instrumentalist? Orchestra Number of String Players Glenshire 43 ...

*January 26, 2016*

**Math**

42<-6d = d<-7

*January 11, 2016*

**Physics**

1. A steam engine converts 150 kg of water completely to steam. The process involves transfer of 4 x 10^8 J as heat. If steam escaping through the safety valve does 2 x 10^8 J of work against outside atmosphere, the net change in the internal energy is: a. 2 J b. 2 x 108 J c. ...

*December 20, 2015*

**Grammar**

For #12, I meant to put simple

*December 16, 2015*

**Grammar**

Label each sentence below as simple, compound, complex, or compound-complex. 1. You can enter the data, or you can interview the candidates. (compound) 2. No one knew the man, and no one asked his name. (compound) 3. After the officer pulled Tim over, Tim began to cry, and the...

*December 16, 2015*

**Grammar**

Thank You!

*December 16, 2015*

**Grammar**

Find the simple subject and simple predicate of this sentence. We have to leave immediately to go to the meeting at the recreation center. the simple subject is we and the simple predicate is have because to leave is an infinitive phrase

*December 16, 2015*

**Grammar**

No, I was asking if all the "to" were preposition in the sentence

*December 16, 2015*

**Grammar**

are all of them a preposition

*December 16, 2015*

**Grammar**

ok thanks

*December 16, 2015*

**Grammar**

For each word, label the parts of speech. We have to leave immediately to go to the meeting at the recreation center. 1. pronoun 2. verb 3. verb 4. verb 5. adverb 6. verb 7. verb 8.preposition 9.adjective(article) 10.noun 11. preposition 12. adjective (article) 13. adjective, ...

*December 16, 2015*

**Biology**

breaks diwn immune system noo

*December 15, 2015*

**Grammar**

For decades, centuries even, the most common way to train a dog was to punish the dog when it did something wrong. This is known as negative training. Often, a choke chain would be used. If the dog did something wrong, such as jumping up on someone or chasing a squirrel, the ...

*December 14, 2015*

**Grammar**

ok thanks

*December 14, 2015*

**Grammar**

Today, it is common to open the newspaper and see that a famous musician is being sued for stealing music from another famous musician. Sometimes, the issue is that a very small section of a song sounds like a song that had been written before. Sometimes, the issue is that a ...

*December 14, 2015*

**Language Arts**

ok thank you

*December 6, 2015*

**Language Arts**

Are these right? My aunt discovered a skunk under her porch and called the Humane Society for help in removing it. *simple sentence Some committee members preferred either a musical comedy or a mystery. *simple sentence

*December 6, 2015*

**Math**

The table shows how many hours Catalina spent babysitting during the months of April and May. a. If Catalina charges $6.50 per hour, what is the percent of change in the amount of money earned from April to May? Is it a change of increase of decrease? b. What is the percent in...

*December 5, 2015*

**Business Math**

But shouldn't ordinary interest be x days out of 360 and exact interest be x days out of 365? My calculations led me to $4,850.10 as the remaining balance after the payment of $4,000. MV (120 days) = $8,500(1+ 9% x 120/360) = $8,755 = $8,755 - $4,000 = $4,755 MV (80 days...

*November 19, 2015*

**math**

How can $12,600 be split between two investments, one paying 6% annually and one paying 8% annually so that the interest from the two accounts equals $864

*October 21, 2015*

**Gr.11 Biology**

In guinea pigs, black cot is dominant to albino. Rough coat us dominant to smooth coat. A black smooth guinea pig was mated with an albino rough guinea pig. Their offspring were black rough and black smooth. If these were the only produced over a period of years of matings, ...

*October 6, 2015*

**Gr. 11 biology**

Your aunt moves out of the town and leaves you her mouse, Henry. In order to make some money, you decide to breed mouse and sell the offspring. In looking over Henry's family history, you discover that Henry's grandfather expressed a rare genetic disorder which leads ...

*October 3, 2015*

**Gr.11 Biology**

Thank you :)

*October 3, 2015*

**Gr.11 Biology**

In humans, muscular dystrophy is a condition in which the muscles waste away during early life, resulting in death in the early teens. It is due to recessive sec-linked gene. A certain couple have 5 children- 3 boys, ages one, three and ten; and 2 girls, ages five and seven. ...

*October 3, 2015*

**Math**

Connor ran around the 1/4-mile track 15 times! Express the distance he ran as a mixed number.

*September 23, 2015*

**Data management**

Which of the following three events is more likely to happen that a person get a) At least 1 six when 6 dice are rolled; b) At least 2 sixes when 12 dice are rolled, or c) At least 3sixes when 18 dice are rolled. Explain why.

*July 26, 2015*

**Data management**

Problems solving with Matrices [-3 1] * [ 4 7 0] 2 5 -3 -5 1 I'm stuck with this matrices. Please help me~~

*July 23, 2015*

**Math**

Determine the probability of drawing two cards from a deck( without replacement) and getting the same suit using 1) conditional probability 2) combinations

*July 14, 2015*

**Math**

Ali has 250 songs on her MP3 player. Of those, 150 are dance songs, 50 are R&B songs, and 30 songs are both dance and R&B. 1) when Ali has her player on shuffle, what are the odds in favour of her hearing a dance song that is not an R&B song? 2) what are the odds against her ...

*July 12, 2015*

**Math**

Suppose that a graphing calculator is programming to generate a random natural number between 1 and 10 inclusive . What is the probability that the number will be prime?

*July 10, 2015*

**Math**

nPr=6720 and nCr=56, then the value if r is___?

*July 8, 2015*

**Data management**

In the expansion of (1+x) to the power of n, the first three terms are 1-0.9+0.36. Find the values of x and n.

*July 8, 2015*

**Gr.12 data management**

There are 52 white keys on a piano. The lowest key is A. The Keys are designated A. B, C, D, E, F, G in succession, and then the sequence of letters repeats, ending with a C for the highest key. A) if five notes are played together simultaneously, in how many ways could the ...

*July 8, 2015*

**chemistry**

Explain the following quote with your understanding of the concept of gas mixtures (Ch. 10 concepts) and the composition of “common air” (i.e. the air in the atmosphere). Inflammable air is hydrogen. “By the experiments... it appeared that when inflammable air ...

*May 30, 2015*

**Algebra**

Assignment 1: LASA 2: The Apportionment Problem You are a census officer in a newly democratic nation and you have been charged with using the census data from the table below to determine how 100 congressional seats should be divided among the 10 states of the union. State ...

*May 23, 2015*

**English**

What is wrong with this sentence? Although they seemed inflamed, the site of the previous craniectomy seemed free of defect.

*May 19, 2015*

**Chemistry**

determine the mass of titanium and iodine that react if 1.38 x 10 to the third kJ of heat emitted by the reaction

*May 2, 2015*

**Chem**

What mass of KCl in grams is formed when 2.00lbs of KClO3 is decomposed?

*April 12, 2015*

**Calculus 2 - Series**

Ahh, for the first problem, I wasn't sure if I was supposed to plug in numbers (1-5) or if there was a particular number I was to plug in rather than randomly, but now realizing that it's between a1-a5 with the numbers accordingly. And for the second problem, I was ...

*March 29, 2015*

**Calculus 2 - Series**

I am so confused on how to do series problems...especially these. How can you tell the pattern and determining the formula for them? Can someone please help? 26) Write the first five terms of the sequence {an} whose nth term is given. an = (n + 3)/(2n − 1) a1 = ? a2 = ? ...

*March 29, 2015*

**Health**

Its B

*February 19, 2015*

**algebra**

An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount, a, spent on advertising (in dollars) by the following formula:

*February 18, 2015*

**Math**

Tension wants to build a soccer field for his team. The area of the field should be 125 square feet. The width is 1/5 of the length. What are the dimensions of the field?

*January 29, 2015*

**Sociology**

How can I get an essay in Sociology?

*December 9, 2014*

**finance**

Suppose an investment offers to triple your money in 36 months (don’t believe it). What rate of return per quarter are you being offered

*October 17, 2014*