# sophia

Newest questions posted by sophia-
## math

When an airplane experiences drag, are the forces added or subtracted? Hint: Drag is the term used to describe the air in front of the plane pushing the airplane backwards. -
## Math

the population of new york city doubles during the workday. at the end of the workday, the population decreases by half. if the population in new york city is roughly 4,000,000 people before rush hour, and morning rush hour lasts 3 hours. what would be the -
## Math

A female grizzly bear weighs 500 pounds. After hibernating for 6 months, she weighs only 200 pounds. What is the mean change in weight per month? -
## Math

How do you explain the meaning of 0? -
## Algebra

If f(×)= 3x^2/×-2, then find f(4) -
## Poetry

In poetry what are regular and irregular lines? -
## Reading

What is a preposition? What is the preposition in this sentence? "Sally read her book in the living room." -
## math

use integers values from 3 to -3 to graph the equation y=-[x] I don't know how to solve this please help and explain it -
## math

Find the number of ways in which 9 people can be divided into 2 groups: the first group has 5 people and the second group has 4 people. -
## math

In how many ways can a committee of 12 people, of which 5 must be in the 21−30 age group, 4 must be in the 31−40 age group and 3 must be in the 41−50 age group, be chosen if there are 6 people of each age group? -
## math

24 How many 5-letter “words” can be formed from the letters of the word FORMULATED, if each must contain 2 vowels and 3 consonants? How many of these will have the vowels at the two ends on the “word”? -
## Math

Dello, i need help with this problem. Find the periodic withdrawals PMT for the annuity given. HINT [See Example 4.] (Assume end-of-period withdrawals and compounding at the same intervals as withdrawals. Round your answer to the nearest cent.) $100,000 at -
## Physics

Thank you Damon for answering my other question.. I appreciate... The distance between two successive crests of a water wave travelling at 3.6m/s is 0.45m. Calculate the frequency of the wave? -
## Physics

The equation y=5 sin(3x-4), where y is in mm, x is in m and t is in secs, represents a wave motion. Determine the frequency, period and speed of the wave -
## Utah state history

1. The contributions of the mountain men include... A: developing first Anglo- American settlements B: establishing good relations with the Native Americans C: developing local resources D: establishing routes through the region for others to follow -
## social studies

one way you cannot get to indianapolis -
## social studies

wich community is in the weastern region of the united states. -
## Math

The median number of magazine appearances made by 7 models is 5. The range of number of magazine appearances by those models is 5. Determine if the following statement is true, is false, or does not contain enough information. At least one of the models -
## English

What is the specific technique of creative non-fiction at work in Keneally’s text, Schniders list -
## Math (Calculus Optimization)

An oil field contains 8 wells, which produce a total of 1600 barrels of oil per day. For each additional well that is drilled, the average production per well decreases by 10 barrels per day. How many additional wells should be drilled to obtain the -
## Physics

An ice cube tray of negligible mass contains 375 g of ice at -5.00 C. What minimum amount of heat must be added to make all the ice into water? -
## science

How are suspensions and solutions similar? How are they different? (can use a Venn diagram) I do not understand how these are similar. -
## Physics

A half pipe can be thought of as half of a cylinder with radius of 7.00m. If a skater with mass 75.0 kg, starts with an initial velocity of 5.00 m/s at the top of the ramp, (a), what is his velocity at the very bottom of the ramp? The skater then -
## French

It may seem like a lot, but It's Not! 1. I reserved a one way ticket. J’ai réservé un aller simple. 2. We’re fastening our seatbelts. Nous sommes attachons notre (nos?... what’s the difference) ceinture de sécurité. 3. The train is early. Le -
## Math

Write a story problem that can be represented with 1152÷24 -
## Biochemistry 105

8. Arrange the following molecules in the order of increasing polarity. a. (PH3, HCl, H2O, CCl4) b. (NH3, HF, H2O, HBr) -
## physics

The energy source used to produce most of the electrical energy in the United States -
## physics

A small dog is trained to jump straight up a distance of 1.2 m. How much kinetic energy does the 7.2-kg dog need to jump this high? (The acceleration due to gravity is 9.8 m/s2.) Show your work for credit. -
## math

Three softball teams ordered equipment from the same catalog. The first team spent $285 on 5 shirts, 4 caps, and 8 bats. The second team spent $210 on 12 shirts and 6 caps. The third team spent $250 for 7 shirts, 10 caps, and 3 bats. What were the catalog -
## College Stats

Suppose that two random variables X1 and X2 have a bivariate normal distribution, and Var(X1) = Var(X2). Show that the sum X1+X2 and the difference X1− X2 are independent. -
## math

maya and winston share some cookies in the ratio 2:3. maya had 3 fewer cookies than winston how many cookies they share altogether? -
## Chemistry

1. A student collected the following data for a fixed volume of gas: Temperature (⁰C) Pressure (mm of Hg) 10 726 20 750 40 800 70 880 100 960 150 ??? Fill in the missing data point. Show all calculations leading to an answer. -
## Chemistry

Which of the following is true about oxidation reactions? A. Oxidation reactions are the principal source of energy on Earth. B. All oxidation reactions are accompanied by reduction reactions. C. The burning of wood in a fireplace and the metabolization of -
## Chemistry

A plasma reaction converts A (Molecular weight = 200) to B and uses NAD as a co-substrate and produces NADH as a by product (1 mole of NADH is produced per every 1 mole of A converted to B). The amount of NADH can be determined by monitoring its’ -
## French

Are the sentences correct in passé composé? I have to use 3 separate verbs, pensé, aimé, 1. J'ai pensé que je venais d'attraper un rhume et me demandais d'où il pouvait venir aussi soudainement. 2. Nous avons aimé la nourriture Safiah. ? Is the -
## Math

In math class, a student has an average grade of 85% for five tests so far. What grade must that student earn on the next test to reach an average grade of 90% for all six tests? -
## maths

amelie is x years old her sister is four years older her brother is three times her age the sum of their age is 44 years -
## French!

Please if possible, respond to this and the other question by 11:00 a.m tmrw. 11/15/16 . Thankyou! ____________________________________ The next part is asking for active voice into passive but I'm not sure how to change it. Really Confused! I need help. -
## French

How do I translate these in passive voice? I don't understand. Help 1. On communique les résultats financiers aux employés. = Les résultats financiers …………………… aux employés. 3. On soumet les recommandations au conseil -
## math

Carlita saw 5 times as many robins as cardinals while bird watching. She saw a total of 24 birds. How many more robins did she see than cardinals -
## math

Ms.Nikkel wants to divide her class of 23 students into 4 equal teams.Is this reasonable?Why or why not -
## MATH HELP PLEASE I HAVE NEVER BEEN MORE CONFUSED

The value of a car decreases at a constant rate. After 1 year the value of the car is $20,000. After 2 more yearsit is $14,000. Write an equation in slope-intercept that represents the value y (in dollars) of the car after x years. -
## math

The value of a car decreases at a constant rate as it grows older. When the car is 2 years old, it is worth $23,000. When the car is 5 years old it is worth $15,500. Write and equation relating y (value of the car $) to x (age of car). -
## math

The value of a car decreases at a constant rate. After 1 year the value of the car is $20,000. After 2 more yearsit is $14,000. Write an equation in slope-intercept that represents the value y (in dollars) of the car after x years. -
## Physics

A superhero flies 185 m from the top of a tall building at an angle of 15◦ below the horizontal. What is the horizontal component of the superhero’s displacement? Draw the vectors to scale on a graph to determine the answer. Answer in units of m. Your -
## Physics

A truck travels beneath an airplane that is moving 150 km/h at an angle of 34◦ to the ground. How fast must the truck travel to stay beneath the airplane? Answer in units of km/h. -
## Physics

What is the direction of this resultant vector (between the limits of −180◦ and +180◦ from the positive x-axis) ? 1. −88◦ 2. −117◦ 3. −144◦ 4. −143◦ 5. −135◦ 6. −171◦ -
## Physics

Consider two vectors F~1 with magnitude 69 N inclined at 177◦ and F~2 with magnitude 58 N inclined at 286◦, measured from the positive x axis with counterclockwise positive. What is the magnitude of the resultant vector F~1 + F~2 ? Draw the vectors to -
## Phyics

Bob heads out into a lake at an angle of 41◦ with respect to the shore. If his boat is capable of a speed of 1.7 m/s, how far from land will he be in 7 min and 17 s ? Answer in units of m. -
## Physics

A person walks 21 m East and then walks 34 m at an angle 32◦ North of East. What is the magnitude of the total displacement? Answer in units of m. -
## Science-chemistry

How do I calculate the amount of heat will be required to make 100.0kg of a compound, the molar enthalpy is -63kj/mol for the same compound -
## math

how do you explain a number pattern -
## Physics

The Olympic record for the marathon set in 2008 is 2 h, 6 m, 32 s. The marathon distance is 26 mi. What was the average speed of the record-setting runner in km/h? -
## Maths

An amount of money is shared by three people in the ratio 2 : 5 : 8. What fraction of this money is given to the person who receives the smallest share? -
## physics

A car accelerates from rest at 1.0 m/s^2 for 20s along a straight roa, it then moves at a constant speed for half an hour, it then deccelerates uniformly to a stop in 30s. Find the total distance covered by the car. -
## math

a jewelry company makes charms in a 2 x 2 x 3 inch box. They ship the charms in a 3 x 4 x 5 inch box. how many of the smaller boxes can fit into the larger box to ship the charms? the first is 2 x 2 x 2 = 12 the second is 3 x 4 x 5 = 60. However, the -
## math

a jewelry company makes charms in a 2 x 2 x 3 inch box. They ship the charms in a 3 x 4 x 5 inch box. how many of the smaller boxes can fit into the larger box to ship the charms? the first is 2 x 2 x 2 = 12 the second is 3 x 4 x 5 = 60. However, the -
## Statistics

For a set of scores with a mean of 111 and a standard deviation of 8, what is the percentile rank of 90? (round to two decimal places, no leading zeros) -
## Chmistry

Write a balanced chemical equation for the combustion of acetylene if the products are: a) Carbon and water vapour b) Carbon monoxide and water vapour c) Carbon, carbon dioxide. Carbon monoxide and water vapour d) The complete combustion of acetylene -
## Algebra 1 college

How much of a 12% saline solution should be mixed with a 4% saline solution to obtain 40 milliliters of a 6% saline solution?. Use a system of equations and elimination method to solve. can someone please see if I am on the right track. 12T + 4F=6x40 -4 -
## English

My homework is about identifying independent and dependent clauses The sentence in () marks is the clause they're asking for. 1. The narrator's mother worked on her inventions at night, (after her husband fell asleep) - Dependent Clause 2. She would work -
## Algebra

Suppose you want to enclose a rectangular garden plot against a house using fencing on three sides, as shown at the left. Assume you have 50 ft. of fencing material and want to create a garden with an area of 150 ft². A. Let w = the width. Write an -
## Math

The area of a rectangle is fixed at 150 square feet. For what lengths will the width be less than 10 ft? -
## Math

1. the points given are two of the 3 vertices of a right triangle. Which could be the third vertex of the triangle given 2 points are (-4,-5) & (3,2) ? 2.) A circle with center O and radius r is intersected at 2 distinct points by line l. Which is true? a. -
## English & Composition

The prompt to this formal essay I have to write is : How do Thoreau in "Civil Disobedience", Gandhi in "On The Eve of Historic Dandi March", and MLK Junior in "Letter from Birmingham Jail reflect the spirit of optimism? -
## Precalc

suppose you want to invest $60,000 for ten years. You can invest your money in a CD that earns 4% interest, compounded quarterly and has no risk, or you can invest your money in futures that ear 10% interest, compounded quarterly. However, the second -
## CHEMISTRY! HELP

1. Given the following set of quantum numbers: 3py -1/2. A chemistry student claims that this represents a peanut-shaped electron. Is she correct? Answer (Am I correct? If not, how?) : She is correct because 3py is a peanut shape with -1/2 being the spin. -
## English & Comp.

Are these right? I wasn't sure of 2 of them. It'll be in parenthesis. Literary Allusion -(Ross’s line in Shakespeare’s Macbeth): “Let not your ears despise my tongue forever.” 26. - the principle guiding the art of writing effectively, eloquently, -
## Chemistry(MOLEDAY)

I created my Mole: MOLE'YMPICS *(Olympics)*... That is my Mole-word or Phrase but Idk if my descriptive caption below would be a phrase. I don't know what my descriptive caption could be. Or at least Idk how to make it FUNNY or HUMOROUS? My original -
## Math (help)

find the zeros of the function: f(x)=2x^4 -x^3 +7x^2 -4x -4 ... -
## Pre calc- confused

Geometry/Maximum area: A rancher wants to enlarge an existing rectangular corral such that the total area of the new corral is 1.5 times that of the original corral. The current corral's dimensions are 250 feet by 160 feet. The rancher wants to increase -
## physics

Two racing boats set out from the same dock and speed away at the same constant speed of 120 km/h for half an hour (0.500 h), the blue boat headed 23.7° south of west, and the green boat headed 34.4° south of west. During this half-hour (a) how much -
## Math

Using the break apart method what is the best way to multiply 8x7 -
## Chemistry

In the last part of this experiment, the temperature of tap water was recorded for fifteen minutes as the tap water was heated in a beaker. Identify the dependent and independent variable. (THE TEACHER Just said THE DEPENDENT AND INDEPENDENT VARIABLE but -
## collocation

1.Analyze the occurrences of collocation used in the below article Puffin Therapy The Atlantic puffin simply vanishes for months at a time. But when it returns to land, the fearless, clown-faced seabird is a sight that soothes the soul of many a -
## Algebra

A baker bakes a batch of muffins and splits the batch evenly onto six different trays. She then adds five croissants to each tray. If each tray now contains at least twenty baked goods, what is the least possible number of muffins in the baker's original -
## Chemistry

How much SO2 is needed to saturate 50g of H2O at 5 degrees Celsius -
## error analyze

Can you check grammar error in this text? What can you do to reduce global warming in Thailand? Nowadays, The problem global warming is main problem for everybody in the world. It is effect on change of weather that the world have temperature highest. In -
## Math

Alan scored a total of 14 points for answering all the 15 questions on a math quiz. For every correctly answered question, Alan got 2 points. For every wrong answer, he lost 2 points. How many questions did he answer correctly? -
## Math

An unfair coin with Pr[H] = 2/3 is flipped. If the flip results in a head, then a marble is selected from an urn containing 9 red, 1 white, and 1 blue marbles. If the flip results in a tail then a marble is selected from an urn containing 10 red and 3 -
## science

How much work is done by the upward force of your head on a 50 N rock that you carry horizontally across a 10 m room? -
## physics

how much work is done by the upward force of your head on a 50 N rock that you carry horizontally across a 10 m room? -
## Math

Leena bakes a loaf of bread. She eats 1/8 of the loaf and gives 1/6 of it to each of her 3 friends. What fraction of the loaf of bread is left? -
## Spanish

Can someone check my answers to this? I'm really confused on these practice problems. Thanks! Directions: Using informal, formal, plural and nosotros commands (use Dop's/Iop's if needed) to correctly answer the questions. The names in parathenisis are what -
## language arts

how to diagram this sentence...The basketball team with the winning record will advance forwards. -
## Math

How can you use decimal squares to represent the product 0 * 0.7? -
## language arts

how to diagram preepositional phrases -
## chemistry

What mass of the metal must be heated to 95 degrees celsius in order to be used to warm 2.548 L of water from 18.1 to 22.5 celsius -
## World Regional Studies/ Geography

In January 2000, cyanide is released to the Tisza River in Hungary. Effect 1: Effect 2: Water Pollution Countries develop industries. Effect 1: Effect 2: Poland’s water in most rivers is unsafe to drink Rain washes fertilizers from fields into bodies of -
## Math

List out the elements of the set "The letters of the word Mississippi" -
## math

a set of five positive integers has a mean median and range of 7 how many distant sets whose members are listed from least to greatest could have these properties -
## Psychology

Describe the chi-square goodness-of-fit test. -
## Psychology

Can you give a real world example of when you would use a chi-square test of independence and a chi-square goodness of fit? -
## Math 6

n ice cream stand sells chocolate, vanilla, and strawberry ice cream as well as a choice of 22 toppings. How many choices are there for a single flavor of ice cream with one topping? How do I do this? is it 46 choices? Am I right? -
## physics

If I am standing on top of a building that is 350 ft. high and I throw a baseball off the roof at angle of 60 degrees, determine how long the ball is in the air as well as how far it lands from the building. -
## ela

in the poem lineage what does they mean -
## math

Len is baking a square cake for his friend wedding. When served to the guests, the cake will be cut into square pieces 1 inch on the side. The cake should be large enough so that 121 guests get one piece. How long should each side of the cake be? -
## math

A portrait of George Washington is square and has an area of 169 square centimeters. How long is each side of the portrait? -
## physics

A car accelerates uniformly from rest to a speed of 21.5 km/h in 6.9 s. Find the distance it travels during this time. Answer in units of m -
## math

On May 23, Samantha Best borrowed $4,000 from the Tri City Credit Union at 13% for 160 days. The credit union uses the exact interest method. What was the amount of interest on the loan?

## Pages

**1**- 2