# Carlos

Most popular questions and responses by Carlos-
## Math - Help!

Which number is an irrational number? a. 0.12 b. 0.1257486… *** c. 0.12121212… d. 0.111111…

*asked on April 14, 2016* -
## Math - Please check!

1. Find the circumference of a circle with a diameter of 11 cm to the nearest hundredth. Measurement formula C = pi x diameter a. 34.54 cm *** b. 17.27 cm c. 5.5 cm d. 33 cm 2. Which of the following is an irrational number? a. square root 144 b. 0.25 c.

*asked on April 14, 2016* -
## Physics

A horizontal force with a magnitude of 3.0 newtons applied to a 7.0 kilogram mass moves the mass horizontally a distance of 2.0 meters. Determine the work done against gravity in moving the mass. What is the formula that you use?

*asked on January 16, 2012* -
## math

John let out 50 foot of kite string when he observes that his kite is directly above a point on the ground 30 feet away from him, how high is the kite ?

*asked on March 15, 2017* -
## algebra

suppose you want to build a rectangular sandbox where the width is 4 ft less than the length and the diagonal is 4 ft longer than the length. what are the dimensions

*asked on December 1, 2012* -
## math

Dylan uses the expressions (x2 – 2x + 8) and (2x2 + 5x – 7) to represent the length and width of his bedroom. Which expression represents the area (lw) of Dylan’s room?

*asked on April 12, 2015* -
## math

from a height of 40 m above sea level, two ships are traveling due west. the angles of depression are 45 degrees and 60 degrees. how far apart are the ships?

*asked on January 29, 2014* -
## math

for the school play, child tickets cost $3 and adult tickets cost $5. The number of adult tickets sold was 20 more than the number of child tickets sold. If the total sales were $2540, how many adult tickets were sold?

*asked on January 22, 2013* -
## science

A ball rolling down an incline travels 6.0 cm in the first 0.25 econds, and 24 cm in the first 0.50 seconds. Find: a)The average speed for the first quarter second time interval B) The average speed for the second time interval C) Find its acceleration

*asked on September 5, 2018* -
## physics

A 2.0kg book is lying on a 0.74m high table. You pick it up and place it on a bookshelf 2.0m above the floor

*asked on October 31, 2014* -
## math

Jane gets 1/2 of a gold star each time she helps her teacher clean up the classroom after art class.How many times would Jane need to help her teacher to earn 3 while gold stars?

*asked on February 12, 2015* -
## Englsih II

Review the poems we have studied in this unit and select the one that appealed to you most. Analyze the poem by answering the following questions. Cite specific lines or phrases from the poem to support your ideas. Be certain to identify your poem by both

*asked on March 18, 2013* -
## Chemisrty

Assuming equal concentrations, rank these solutions by pH: hclo4 caoh2 NH3 koh hbro

*asked on March 5, 2016* -
## physics

Carlos does a chin-up in gym class and raises himself 0.8 m. If Carlos has a mass of 62 kg, how much work does he accomplish?

*asked on June 29, 2011* -
## pre-cal

The angle of elevation from a car to the top of an apartment building is 48 degrees. If the angle from another car that is 22 feet directly in front of the first car is 64 degrees. How tall is the building?

*asked on August 21, 2016* -
## chemistry

How do you calculate the mass percent composition of nitrogen in NO2?

*asked on September 27, 2014* -
## chemistry

how many moles of aluminum are needed to react completly with 1.2 mol of FeO 2Al(s)+3FeO(s)=3Fe(s)+ Al2O3(s)

*asked on April 1, 2013* -
## Chenistry

A 0.8870g sample of a mixture of nacl and kcl is dissolved in water and the solution is then treated with an excess of agn03 to yield 1.913g of agcl. Calculate the percentage by mass of nacl in the mixture 1.913g/ 143 = 0.0133 M agcl x/58 + Y/74 (0.887g-x)

*asked on January 19, 2014* -
## Physics

A girl sitting on a merry-go-round moves counterclockwise through an arc length of 3.75 m. If the girl’s angular displacement is 2.12 rad, how far is she from the center of the merry-go-round? Answer in units of m

*asked on February 4, 2014* -
## Chemistry

How are intermolecular forces different from the forces that bond atoms together into molecules? How are they similar?

*asked on January 12, 2018* -
## physical educatioin

Your target heart rate _____.

*asked on February 1, 2017* -
## statistics

(3,5,7,9,11)U(3,6,9,12,15) would correctly be expressed as

*asked on July 28, 2012* -
## Nouns

In the United States, cell phones are a very popular item. The nouns in this phrase would be "United States" and "cell phones" but would "item" be considered a noun also??

*asked on May 13, 2010* -
## 5 th grade math

Gracie read 150 pages of a book. The is 227 pages long. Which equation shows the amount she still needs to read to finish the story? A.150-n=227, B. 227+150=n, C.n-150=227, D.n+150=227

*asked on January 10, 2013* -
## math

jonah's sister is 10 years old. Jonah is 8 years younger than twice his sister age

*asked on October 11, 2018* -
## Physics

A girl sitting on a merry-go-round moves counterclockwise through an arc length of 3.75 m. If the girl’s angular displacement is 2.12 rad, how far is she from the center of the merry-go-round? Answer in units of m

*asked on February 4, 2014* -
## Nouns

Hawaii is one of the most beautiful places on earth. Would "places" be considered a noun??

*asked on May 13, 2010* -
## phicis

a rock is dropped from a cliff and reaches the ground in 2.70s . At the same time another rock is thrown horizontally from the same height with initial x velocity of 0.95 m/s. what distance will in x will the second recover?

*asked on February 3, 2019* -
## word problem, Im lost on how to set this up

Joe has scored 84, 89, and 90 on his first three exams in his math class. If the standard 70,80,90 scale is used for grades and the exams are equally weighted, what must he score on the final exam, f, in order to a) Get a C average on exams? f b) Get a B

*asked on February 26, 2017* -
## Algebra

A rectangular swimming pool is twice as long as it is wide. A small concrete walkway surrounds the pool. The walkway is a constant 2 feet wide and has an area of 196 square feet. Find the dimensions of the pool.

*asked on February 8, 2015* -
## English

Read the definition. Need Help the result produced from an event Which term is defined? A.cause B.exposition C.effect D.elaboration

*asked on May 13, 2014* -
## Nouns

Reggei bought a computer today at the store for $700. Are the following words nouns: reggei, bought, computer, store,and $700. Do I need to add more or eliminate??

*asked on May 13, 2010* -
## Math Fractions

Warren read 1/6 of the pages of a book last Monday. Tuesday he read 2/5 of the remainder of the pages. Wednesday he read 1/3 of the remaining pages. He has 60 more pages left to read. How many pages does the book have?

*asked on February 21, 2016* -
## English

Which of the following describes literary analysis? Need help Please. A.writing that is vague and uncertain B.a central message about life C.determining the meaning behind events and characters’ actions D.written directions about how the actors sound and

*asked on April 27, 2014* -
## statistics

Expected relative frequency probability represents a calculated probability based on large numbers of trials. In an example of a deck of 52 cards, where you randomly pull cards from the deck and record what they are, you find that over 1000 random draws,

*asked on July 28, 2012* -
## chemistry

List the following strong electrolytes solutions in order of increasing boiling point. a. 0.1 M CaCl2 b. 0.1 M AlCl3 c. 0.1 M CaS

*asked on October 1, 2016* -
## english

Choose an essay or a short story to read. Then answer the following questions in the space provided. 10.What is the title of the story essay? 11.Who wrote it? 12.Whom is the story about? (Identify the main characters [or, if an essay, the subject

*asked on March 25, 2013* -
## geometry

if EBD= 4x-8, and EBC=5x+20, find x

*asked on September 12, 2011* -
## ap physics

You measure the radius of a wheel to be 4.16 cm. If you multiply by 2 to get the diameter, should you write the result as 8 cm or as 8.32 cm? Justify your answer.

*asked on September 19, 2010* -
## word problem, please

Joe has scored 84, 89, and 90 on his first three exams in his math class. If the standard 70,80,90 scale is used for grades and the exams are equally weighted, what must he score on the final exam, f, in order to a) Get a C average on exams? f b) Get a B

*asked on February 26, 2017* -
## Physics

The students made it to the bottom with out a problem but added 400 kg for a total of 455 kg and slides for 12.2 s across the surface of a frozen lake. If the coefficient of kinetic friction between the kid and the ice is 0.071, what is the change in the

*asked on February 25, 2014* -
## Math Algebra 1

Suppose you and your friends form a band and you want to record a demo. Studio A rents $125 plus $50 an hour Studio B rents for $200 and $25 and hour. Let t=the number of hours and c = cost. Solve/Write and equation to represent the cost of each studio

*asked on December 20, 2017* -
## 3rd grade math

Robert is writting a poem. The poem is divided into 5 stanzas and is on 2 pages. There are 60 lines in the poem. How many lines are in each stanza? show work please

*asked on March 29, 2011* -
## Science

Mass= 48g; volume=24 cm3 . What is the density of this substance ?

*asked on October 24, 2009* -
## algebra

The admission for a school play is $2.50 for children and $9.00 for adults. On a certain day, 288 people attended the play, and the total money collected from sales was $1760. How many children and how many adults were admitted?

*asked on April 11, 2017* -
## Pysics

A caiman swims 185 meters at a speed of 6 m/s. It then enters a stream and slows to 2 m/s for 310 meters. What is the average speed of this cousin of the crocodile?

*asked on September 14, 2013* -
## help with my topic speech

hi, in my english class we are taking a presuation unit and the next week i must present and speech and give 5 reasons for why something is better than something. well i choosed counter strike becouse it will be easier Stick out tongue [:P] my work is

*asked on March 16, 2007* -
## Algebra

I need ansewer asap There are a famous irrational nummber calld euler's number,often symbolized with an e. Like pie it never seems to end. The first few digits of e are 2.7182818284. Bettween which two square roots of integers could you find this number?

*asked on August 30, 2017* -
## Math

Robert is writting a poem. The poem is divided into 5 stanzas and is on 2 pages. There are 60 lines in the poem. How many lines are in each stanza? shoe work please

*asked on March 29, 2011* -
## Math

A license plate is to consist of two letters followed by three digits. How many different license plates are possible if the first letter must be a vowel, and repetition of letters is not permitted, but repetition of digits is permitted? The first position

*asked on March 25, 2007* -
## algebra

A car rental company offers two plans for renting a car. Plan A:40 dollars per day and 20 cents per mile. Plan B: 56.32 dollars per day and 12 cents per mile. If you plan to rent the car for one day, and "m" represents the number of miles driven in that

*asked on March 26, 2017* -
## English

Write two compositions. To help you get started, you can choose to write about any two of the following four topics: -a job report. -your most unforgettable character. -an analysis of the causes for some phenomenon or event. -the consequences of a new

*asked on July 25, 2013* -
## Physics

Calculate the vertical distance an object dropped from rest covers in 12 seconds of free fall. (The unit of measure for distance is the meter, written as m.)

*asked on July 10, 2013* -
## Economics

If Starbucks raises its price by 7 percent and McDonald’s experiences a 0.3 percent increase in demand for its coffee, what is the cross-price elasticity of demand?

*asked on May 27, 2012* -
## math

Pedro types 240 words in 5 minutes. How many words can he type in 12 minutes? please help.

*asked on May 6, 2014* -
## Science

The vapor pressure of water at 25 oC is 23.8 torr. Calculate the vapor pressure of a solution prepared by dissolving 35.0 g of urea [(NH2)2CO] in 75.0 g of water at 25 oC.

*asked on February 17, 2013* -
## statistics

An extreme score that sets apart in value from the general distribution of values with which it is connected is known as…?

*asked on July 28, 2012* -
## World history

How did king leopold develop his image as a great humanitarian leader?

*asked on January 22, 2012* -
## 6th grade math

You are putting up a 60 foot long fence in your backyard. According to the manufacturer's instructions, the fence posts should be equally spaced along the length of the yard. List all the possible spacing options if the amount of space between the posts is

*asked on September 21, 2009* -
## English

20. When enclosing a quotation within a quotation, use A. single quotation marks. B. parentheses. C. dashes D. ellipses. 20 D

*asked on February 10, 2018* -
## word problem

A man has 37 coins in his pocket, all which are dimes and quarters. If the total value of his change is $6.70, how many dimes and how many quarters does he have? Let x represent the number of dimes and y represent the number of quarters. its asking me just

*asked on April 5, 2017* -
## Chemistry

A 5.0×101 kg sample of water absorbs 324 kJ of heat. If the water was initially at 22.2 ∘C, what is its final temperature?

*asked on February 20, 2017* -
## Chemistry

Calculate the volume of 0.05 M NaOH which must be added to 100 cm3 of 0.05 M methanoic acid to obtain a buffer of pH 4.23. (Ka for methanoic acid = 1.77 x 10-4)

*asked on October 11, 2016* -
## Physics

I am really confused on the steps to solve this problem. This is my first time taking physics. The much needed help, would be strongly appreciated. a) Calculate the centripetal force exerted on a vehicle of mass m = 1630 kg that is moving at a speed of

*asked on October 21, 2014* -
## physics

A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

*asked on December 15, 2010* -
## physics

A pair of blocks, one 3 times as massive as the other, are connected by a compressed spring. When the spring is released, the blocks fly apart. Compared to the heavier block, how many times faster does the lighter block accelerate?

*asked on October 16, 2010* -
## economics

describe a specific event that would make each of the following happen to a production possibilities curve a) a point moves down and to the left B the frontier shifts to the right.

*asked on September 5, 2010* -
## Grammar

A high school is a valuable asset. What are the verbs

*asked on May 7, 2010* -
## Social Studies

DRAW CONCLUSIONS: How Piankhi's belief that he was supported by gods did affect his plan for Egypt? Illustrate our wirtings with a picture of Piankhi.

*asked on January 26, 2010* -
## college

in athens, during its golden age (from 460 to 404) it had the kind of government that we call: a.)indirect democracy,B)western monarchy,C)direct democracy,D.)eastern style republic

*asked on June 3, 2009* -
## English

2. According to MLA citation style rules, when citing a book by more than one author, the authors' names should A. be listed alphabetically by last name. B. follow the title of the book. C. be listed alphabetically by first name. D. be listed in the order

*asked on February 10, 2018* -
## Chem

A 0.649 m aqueous solution of a monoprotic acid (HA) freezes at -2.34°C. Find the pKa of this monoprotic acid. Kf of water = 1.86 °C/m

*asked on June 4, 2017* -
## word problem

In 1994 the moose population in a park was measured to be 6400. By 1996, the population was measured again to be 6800. If the population continues to change linearly: Find an equation for the moose population, y,in terms of x, the years since 1994. Ive

*asked on March 28, 2017* -
## word problem, please help

The local hospital currently has 25 nurses. The hospital administrator sees that they are adding 4 nurses each year to their staff (which included the loss from nurses leaving the hospital). The administrator knows that they need to have at least 41 nurses

*asked on February 26, 2017* -
## Chemistry

The reaction: H2C2O4 + CuO + Heat = ? This reaction was produced in organic elemental analysis to identify C and H. So I think CO2 is formed to react with Ca(OH)2 to giving CaCO3. Additionally was formed H2O, so I though H2 or H2O was produced. Is correct

*asked on November 26, 2014* -
## Math

A particle is moving along the curve y = 4x^2 + 1 in such a way that the y coordinate is increasing at a rate of ½ units per second. At what rate is the x coordinate changing at the instant x = 2?

*asked on February 23, 2014* -
## Physics

While exploring the canopy of the rainforest in equatorial South America, Anastasia falls from a branch 43.0 meters high. Exactly 1.6 seconds later Joe falls from the same branch. How high above the ground is Joe when Anastasia splats into the mud below?

*asked on September 30, 2013* -
## PHYSICAL SCIECE

A seismic wave has a velocity of 5000 m/s and a frequency of 4Hz. wht is the wavelength of this wave? if this was a light wave traveling in a vacuum with the same wavelength, what would be its period?

*asked on July 14, 2011* -
## physics

A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

*asked on December 15, 2010* -
## economics

problema solving how would you illustrate the impact of each of the followimg events on a production possibilitities curve for factoey goods and farms? A)the computer is invented B)1 million farm workers remain unemployed for six months c) a drought

*asked on September 5, 2010* -
## Grammar

Adam and eve lived in the garden of Eden. What are the verbs in this phrase.

*asked on May 10, 2010* -
## Chemistry

A sample of InCl3, is known to be contaminated with NaCl. The contaminated sample weighs 2.84g. When the contamintaed sample is treated with excess AgNO3(aq). 574 grams of AgCl(s) are obtained. What is the percentage by mass of InCl3 in the sample? (All I

*asked on January 21, 2007* -
## math

A rectangular prism has dimensions 5 by 6 by x. If the total surface area of the prism is 157.9 square units, what is the value of x? What is the volume of the above prism?

*asked on April 15, 2018* -
## algebra please help

In certain parts of the ocean the pressure of sea water, in pounds per square foot, at a depth of "d" feet below the surface, is given by P=13+ 4d/9 If a scientific team uses special equipment to measure the pressure under water and finds it to be 401

*asked on May 3, 2017* -
## Math

A man who is 6.2 ft tall casts a shadow that is 13.6 ft long. Find the height of a petrified stump that casts a 16.9 ft shadow.

*asked on November 21, 2015* -
## algebra

three times an odd integer is eleven less than four times the next greater even integer. What is the odd integer?

*asked on January 25, 2015* -
## physics

A golfer takes two putts to get his ball into the hole once he is on the green. The ﬁrst putt displaces the ball 3.4 m east, and the second 6.55 m south. What displacement would have been needed to get the ball into the hole on the first putt. answer in

*asked on January 1, 2015* -
## Health part 2

The brain is divided into the _______. A. Cerebrum B. Cerebellum C. Brain stem D. All of the above

*asked on November 5, 2013* -
## Health part 2

The three basic parts of a neuron include ________. A. Soma, dendrites, axon B. Dendrites, cell body, neurotransmitters C. Axon, dendrites, neurotransmitters D. None of the above

*asked on November 5, 2013* -
## Pysics

Marbles rolling down the ramp and horizontally off your desk consistently land 46.0 cm from the base of your desk. Your desk is 78.5 cm high. If you pull your desk over to the window of your second story room and "launch" marbles to the ground (6.04 meters

*asked on October 17, 2013* -
## English

Need help please. For the following exercise, choose a topic, and then determine which method of organization is best suited for its development. Next, write a topic sentence that applies to your treatment of the subject. Finally, list at least four

*asked on July 31, 2013* -
## english

Need Help.Please and Thanks. Read each of the following topic sentences, create your own topic sentence that expresses something about your particular opinion on the subject. Example: Topic sentence provided: When I have free time, I like to relax with a

*asked on July 25, 2013* -
## Math

Determine the number of subsets of A={1,2,…,10} whose sum of elements are greater than or equal to 28.

*asked on March 24, 2013* -
## literature

The Electronic Reserve Reading for this week, “Bare Bones Guide to Good Introductions,” states that an effective introduction must “make use of psychology” (p 20). · What do you think the author meant

*asked on November 24, 2012* -
## Statistics

Construct the probability distribution for the value of a 2-card hand dealt from a standard deck of 52 cards (all face cards have a value of 10 and an ace has a value of 11). a) What is the probability of being dealt a hand that adds up to 21? b) What is

*asked on August 20, 2011* -
## chemistry

Calculate the equilibrium vale of Pb +2 (aq) in 1.00 L of saturated PbCl2 solution to which 0.250 mole of NaCl has been added. 60.0 ml of 0.0300 M NaCl 60.0mL of 0.0500 M Pb(NO3)2

*asked on April 13, 2011* -
## chemistry

if you start with 100mg of radioactive material that has a half life of one hour, how many mg's of radioactive material would you have in 10.2284952 hours?

*asked on February 1, 2011* -
## physics

A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 17.7 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 . Find the difference in gravitational po- tential energy associated with the

*asked on December 15, 2010* -
## physics

*asked on December 15, 2010* -
## Nouns

Life is full of choices, so I must learn to make good ones. In this phrase "life" and "I" are nouns but is "ones" considered a noun also because is used as number or no??

*asked on May 13, 2010*