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October 1, 2014

Posts by SARA


Total # Posts: 3,677

math
how many real roots does the polynomial 2x^5+8x-7 have
September 5, 2012

statistics
Thanks for the guidance. Does it make sense that I would get 1? 1. z = (x - μ) / σ z = (84-100)/8 z = -16/8 z = -2 and z = (116-100)/8 z = 16/8 z = 2 area = .0228+.9772 Area = 1
September 4, 2012

statistics
The mean of a normal probability distribution is 100 and the standard deviation is 8. About what percent of the observations lie between 84 and 116?
September 4, 2012

Discrete Mathematics
Mathematical sequences can be used to model real life applications. Suppose you want to construct a movie theater in your town. The number of seats in each row can be modeled by the formula C_n = 16 + 4n, when n refers to the nth row, and you need 50 rows of seats. (a) Write ...
September 4, 2012

math
for #1, where did you get the negative for - ( x+ 4 )
September 4, 2012

math
I tried solving these problems and get stuck . Can you please tell me what am I suppose to do next or did I do them all wrong 1. (x+5)^2 = (x+4)^2 √(x+5)^2 = √(x+4)^2 x+5 = x+4 ? 2. (4x+7)^2 = 144 √(4x+7)^2 = √144 4x+7 = 12 ? 3. (x-5)^2 = 30 √(x-5...
September 4, 2012

Physics
You drop a rock off a bridge. 4. (2 pts) How fast is it going after 2.0 s?
September 2, 2012

chem
i think it stands for alpha. so would i just do the U + alpha -> neutron +Pu?
August 31, 2012

chem
Write balanced equations for the following reactions. (Use the lowest possible coefficients. Omit states-of-matter in your answer. 238 U 92 (á, n) 241 Pu 94 sorry teh formating is off
August 31, 2012

math
lithium citrate comes in 300 mg/5ml. the doctor calls and asks you to compound lithium citrate ''light'' (75mg/5ml). How would you dilute the citrate to proper dose?
August 29, 2012

stumping question
what is the difference between hydrofluoric acid and hydrogen fluoride. arnt they both HF?
August 29, 2012

U.S. History
I don't really understand the Spanish Colonial Empire during 33,000 b.c. to a.d. 1769 Who where involved? What was this? When did this take place? Where did this take place? Why is it so important?
August 29, 2012

Reading
May you please help me understand these questions? Thanks! 1. What does Spaz's story reveal about Spaz's origins? 2. With what is Spaz afflicted? In why way is it a blessing?
August 27, 2012

Physics
A helicopter is traveling with a velocity of 12 m/s directly upward. Directly below the helicopter is a very large and very soft pillow. As it turns out, this is a good thing, because the helicopter is lifting a large man. When the man is 20 m above the pillow, he lets go of ...
August 26, 2012

Physics
You are standing at the foot of the Bank of America building in San Francisco, which is 52 floors (237 m) high. You launch a ball straight up in the air from the edge of the foot of the building. The initial vertical speed is 70 m/s. a. How high up does the ball go? b. How ...
August 26, 2012

Reading
In this book I'm reading one of the questions ask: What is the significance of Bean finding the color blue? What does the question mean?
August 26, 2012

chem
what is the symbol for the element that has 78 protons 76 electrons 117 neutrons and a +2 net charge? i thought it was ^195Os^+2 but that is wrong. Thanks for the help!
August 25, 2012

Physic
If a clock in an airplane is found to slow down by 5 parts in 1013, (i.e., ∆t/∆to = 1.0 + 5.0 × 10. −13), at what speed is the airplane traveling? (Hint: You might need to use an expansion for y) I am not sure which equation to use can someone please ...
August 23, 2012

Physic
A sodium-vapour lamp illuminates, with monochromatic yellow light, two narrow slits that are 1.00 mm apart. if the viewing screen is 1.00m from the slits and the distance from the central bright line to the next bright line is 0.589 mm, what is the wavelength of the light? can...
August 23, 2012

Physics
On your wedding day your lover gives you a gold ring of mass 3.78 g. 50 years later its mass is 3.16 g. On the average how many atoms were abrated from the ring during each second of your marriage? The atomic mass of gold is 197 u
August 23, 2012

Social Studies
sorry. c?
August 22, 2012

Social Studies
is it d then?
August 22, 2012

Social Studies
Following on the successful activism of Cesar Chavez, Mexican American youths began to refer to themselves as A. Mexicans. B. Los Barrios. C. Chicanos. D. Los Hombres. is it a?
August 22, 2012

Social Studies
The 1978 Supreme Court decision in Bakke v. Regents of the University of California A. ruled in favor of affirmative action within specified limits. B. established the "red state-blue state" divide. C. established the rights of students to appeal college admissions ...
August 22, 2012

Social Studies
THE FIRST ONE IS WRONG
August 22, 2012

Social Studies
Which of the following statements about Truman's Fair Deal is true? A. It was reluctantly passed by Congress. B. It repealed the New Deal. C. It was Truman's response to the Soviet's Sputnik. D. It called for national medical insurance. is it d?
August 22, 2012

Social Studies
The majority of states that did not ratify the Equal Rights Amendment were located in the A. Midwest. B. Southeast. C. West. D. Northeast. is it B?
August 22, 2012

Social Studies
During World War II, the tide turned in favor of the United States at the Battle of A. Leyte Gulf. B. Okinawa. C. Midway. D. the Coral Sea. is it C??
August 22, 2012

Home economics
I need help on a hw question. Can a company bill you if you just give them your billing address or do they need a credit card number(or some type of payment)
August 21, 2012

Science
#9 is d?
August 21, 2012

Science
#3 is D?
August 21, 2012

Science
Okay. Is #1 B? Because it does support life. I know that. Coal isn't manufactured, & isn't in a liquid form, and it is organic. Is #9 b, as well?
August 21, 2012

Science
9. Which one of the following statements is characteristic of liquid water? A. It has a definite shape but not a definite volume. B. It has neither a definite shape nor a definite volume. C. It has a definite volume and a definite shape. D. It has a definite volume but not a ...
August 21, 2012

Physics
what is 5.76??
August 19, 2012

Physics
3 charges sit on vertical equilateral triangle the side of each is 30.0 cm. if the triangle are A= +4.0 uC B=+5.0 uC and C=+6.0 uC (clockwise from top) what is the force on each charge? Can someone please explain me in detail i am really confuse :(((
August 19, 2012

math
Sorry, I meant A.
August 18, 2012

math
The quotient of 5/31 divided by 15/23, reduced to the lowest fraction, is A. 23/93. B. 93/23 or 4 1/23. C. 75/373. D. 115/465. Is it b?
August 18, 2012

Math
D?
August 18, 2012

Math
The amount $180.00 is what percent greater than $135.00? A. 35% B. 75% C. 133.33% D. 33.33% Is it b?
August 18, 2012

MATH
You wish to mentally estimate the total cost of items that have the following prices: $1.85, $.98, $3.49, $9.78, and $6.18. Rounding off the items to the nearest half-dollar, your estimate of the total cost of these items is A. $22.50. B. $22.30. C. $22.59. D. $23.00. Is it A??
August 18, 2012

Physic
The field of an unknown charges is first mapped with a 1.0 X 10^-8 C test charges, then repeated with 2.0 X 10^-8 C test charge. a) would the same forces be measured with the two test charges (Explain)? b) would the same fields be determine using the two test charges (Explain)?
August 17, 2012

physical
But if i do this for force of friction, the result of frictional force is going to be negative. :(
August 17, 2012

physical
A 0.8 kg block of wood has an initial velocity of 0.25 m/s as it begins to slide across a table. The block comes to rest over a distance of 0.72m. a) what is the average frictional force on the block? b)How much work is done on the block by friction? c)How much work is done on...
August 17, 2012

physic
3 charges sit on vertical equilateral triangle the side of each is 30.0 cm. if the triangle are A= +4.0 uC B=+5.0 uC and C=+6.0 uC (clockwise from top) what is the force on each charge?
August 17, 2012

English
What is a cliche and what is a sentence that's an example?
August 17, 2012

English
Identify the sentence that contains a noun clause in italics. A. What Betty wants is to harvest the corn. B. When should Betty harvest the corn? C. Betty wants to harvest the corn. D. Betty would like to harvest the corn. Is it D?
August 17, 2012

English
Which one of the following is a correct example of the plural possessive case? A. woman's plans B. it's place C. men's plans D. stone's throw is it a?
August 17, 2012

English
is it C?
August 16, 2012

English
Choose the sentence that has a compound predicate. A. Sandy washed and ironed her clothes. B. Sue and I will listen. C. We went home to eat and to study. D. Swimming and golfing are Jim's favorite sports. Is it D?
August 16, 2012

english
So it's A?
August 16, 2012

english
Choose the correct singular, third person, conjugation of the verb to be in the future perfect tense. A. You have been B. I will be C. She will have been D. They will have been is it D?
August 16, 2012

English
In the following sentence, what is the subject complement? My neighbor is a newspaper reporter. A. Reporter B. My C. Neighbor D. Newspaper Is it A?
August 16, 2012

English
Which kind of adjective is used most frequently in ordinary speech or writing? A. Proper B. Common C. Article D. Demonstrative Is it B?
August 16, 2012

English
in*
August 16, 2012

English
In the following sentence, identify the part of speech of the italicized word. Thousands of years ago, fish were caught in nets and traps. A. Verb B. Preposition C. Pronoun D. Conjunction Is it B?
August 16, 2012

Algebra2
Sorry "being" shouldn't have been there. Another mistake!
August 16, 2012

Algebra2
Lol:D You were being speeding threw the problems just like me! i did that in problem 4! I got the right answer now! Thank you!
August 16, 2012

Algebra2
I think i know what i did wrong in problem 4! My multiplication is wrong!
August 16, 2012

Algebra2
I went back and I corrected problem 2 and 3. In problem 2 I found my mistake, But in problems 1 and 4 I'm stuck and can't figure out how you got those answers. I did the problems at least 4 times already and I keep getting the same answers:/
August 16, 2012

Algebra2
I Made a Mistake Problem #4 Answer Is 21-20i
August 16, 2012

Algebra2
Check Answers Please? 1. 5+(2+3i) + (-3-7i) = 4 + -4i 2. (5-10i) - (2+i) = 7 - 9i 3. -5i(2-3i) = -10i - 15 4. (2+3i)(-3-7i) = (1)(4i)
August 16, 2012

Algebra2
Thanks! I Seen My Mistakes and Fix Them. Thank You .
August 16, 2012

Algebra2
Can Someone Check My Anwsers? 1. -17=10x+3 = x=2 2.9x+5=7x+3x-2 = x= 7/1= 7 #I Do Have My Work Shown, On a Seperate Sheet Of Paper . But I Want to Know If I Got My Answers Right.
August 16, 2012

Algebra2
Oh Okay . I Tried The Other Two Problems. For #1 I Got 120 As My Answer. For #2 I Got 37 As My Answer.
August 16, 2012

Social Studies
I have. Is it A?
August 15, 2012

Social Studies
When postwar expansion slowed in the 1950s, an economic stimulus was provided by A. increased consumer goods manufacturing. B. the baby boom. C. Cold War spending. D. the construction of Levitt Towns. Is it B?
August 15, 2012

Social Studies
So, it's A?
August 15, 2012

Social Studies
At the beginning of World War II, Roosevelt dealt with France A. by supporting the Free French under Charles de Gaulle. B. by seeking an alliance with French Algeria. C. by joining with the British in an assault on North Africa. D. through negotiations with the Vichy ...
August 15, 2012

Social Studies
During the election of 1936, declaring their party a "millionaire's union," Franklin Roosevelt focused mainly on defeating the A. Union Party running William Lemke. B. Liberty League running Alfred M. Landon. C. Liberty League running Father Coughlin. D. Union ...
August 15, 2012

Social Studies
B. Band Concerts?
August 15, 2012

Social Studies
Before 1910, the most popular form of public entertainment was A. viewing motion pictures. B. band concerts. C. ballroom dancing. D. baseball. Is it C?
August 15, 2012

Social Studies
As passed by the Congress after McKinley delivered his war message to Congress, the declaration of war against Spain was modified by the Teller Amendment, which stipulated that A. the United States reserved the right to annex Cuba. B. trade with Spain would continue as usual. ...
August 15, 2012

Social Studies
Okay. Are these sites trustworthy?
August 15, 2012

Social Studies
In a famous speech, William Jennings Bryan A. declared that mankind shouldn't be "crucified on a cross of gold." B. refused to be allied with the so-called "silverists." C. declared his staunch support of the gold standard. D. refused his nomination as ...
August 15, 2012

Social Studies
Which of the following was true of Secretary of State William Henry Seward? A. He opposed American imperial expansion. B. He annexed the Midway Islands. C. He negotiated the purchase of Alaska from Canada. D. He was successful in negotiating a trade deal with the Kingdom of ...
August 15, 2012

Social Studies
The ___________ expressed the darkest and most ominous aspect of the rural counterattack of the early 1900s. A. Ku Klux Klan B. Palmer raids C. Red Scare D. Prohibition movement Is it A. Ku Klux Klan?
August 15, 2012

math
The figure above consists of two equilateral triangles, one of which is inside the other. If the unshaded region within the larger triangle makes up 8/9 of that triangle's area, what is the ratio of the perimeter of the larger triangle to the perimeter of the smaller ...
August 8, 2012

Reading
They did mention something named "The Big Shake" and I was thinking about the same idea. Thanks!
August 6, 2012

Reading
I am reading this book called "The Last Book in the Universe" and I have to answer some questions and one of the questions asked : (chapter 2) What happened in the big times that changed the way people live? What do we call this phenomenon? Can you explain the second...
August 6, 2012

MAth
I am having trouble solving this problem. Q - One mile is 5280 feet. Justin has a stride of 32 inches. How many steps will he take to run a 26-mile marathon. I tried 5280 x 32 = 168,960 incorrect. 5280 x 26 = 137,280 divided by 32 = 4290 incorrect.5280 divided by 3(3feet)=1760...
August 6, 2012

geometry
Circle O is defined by the equation x2 + (y - 2)2 = 25. Plot the center of Circle O and type in the coordinates of one point with integral values that lies on Circle O.
August 5, 2012

math
what is the area of a regular hexagon inscribed in a circle with area of 9?
August 2, 2012

Math
a polygon P is inscribed in a circle C with area of pie. Circle C and polygon P MUST intersect in at least how many points?
August 1, 2012

Math
what is the area of a regular hexagon inscribed in a circle with area of 9?
August 1, 2012

early childhood education
typically when paired with a boy in a laboratory play session a two year old girl os likely to
July 25, 2012

chemistry
When the conductivity is at a minimum, what must be true about the amount of Ba(OH)2 compared to H2SO4? The Ba(OH)2 dissociates as Ba+2 + 2 OH-. H2SO4 dissociates as 2 H+ + SO4-2. Why does it not conduct at this low point? Why does it conduct more before and after this minimum...
July 25, 2012

Geometry
The diagonals of an isosceles trapezoid divided it into one pair of congruent triangles and one pair of similar triangles.
July 25, 2012

MATH
2x-3(x+4)= -5 The answer is -7 , but I am unable to get this answer. tried working problem several ways get different answers for ex. I get -17 or 7 Please I need some help
July 24, 2012

science
how might the environmental impacts of deforestation and sprawl affect the human community of Pinchot
July 23, 2012

Physical Science
A tire contains air at a pressure of 2.8 bar at 10C. If the tire’s volume is unchanged, what will the air pressure in it be when the tire warms up to 35C as the car is driven?
July 21, 2012

Chemistry
About 13% of the acid in a 0.10M solution of a weak acid dissociates to form ions. What is the H3O+ concentration? What is the OH- concentration? What is the pH of the solution?
July 18, 2012

Chemistry
What is the HCl concentration if 72.1ml of 0.035M NaOH is required to titrate a 20.0ml sample of the acid?
July 18, 2012

math
Write a story problem that can be solved using the equation 3/4 x 36 = n I know the answer but I don't know how to write a story problem to go with it... I saw a question similar to this but it had two fractions and confused me...
July 10, 2012

science
How much force is needed to give a 5-kg box and upward acceleration of 2 m/s2?
July 5, 2012

science
How fast must a fall be thrown upward to reach a height of 12 m?
July 5, 2012

physical science
The acceleration of gravity on the surface of Venus is 8.9 m/s2. Would a ball thrown upward on Venus return to the ground sooner or later than a ball thrown upward with the same speed on the earth?
July 5, 2012

physical science
. The brakes of a car are applied to give it an acceleration of -3 m/s2. The car comes to a stop in 5 s. What was its speed when the brakes were applied?
July 5, 2012

physical science
. Three forces, each 10 lb, act on the same object. What is the maximum total force they can exert on the object? The minimum total force?
July 5, 2012

Trig
Find sin2theta, cos2theta if csctheta=13/12 and lies in quadrant II. Thank you!
June 13, 2012

chemistry
A 375 g sample of well water is found to contain 17.0 mg of lead. How much lead (in parts per million) is in the well water? Round to the nearest tenth. Don't forget the unit.
June 12, 2012

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