Questions Asked on
April 17, 2014

Math
13. A true or false test has 8 questions. What is the probability of guessing the correct answers to all the questions? A. 1/10 B. 1/16 C. 1/64 D. 1/256
asked by Chris 
Math
Simplify 15C3 A. 182 B. 455 C. 2,730 D. 910
asked by Chris 
Statistics Emergency please
People end up tossing 12% of what they buy at the grocery store (Reader's Digest, March 2009). Assume this is the true population proportion and that you plan to take a sample survey of 540 grocery shoppers to further investigate their behavior. a)What is
asked by Vanessa 
social studies check answers
6.A 7.B 8.C 9.B 10.A 6.You want to emphasize the characteristics that unite the nations of Caribbean South America today. On which topic are you most likely to focus? A. cultural influences B. government leadership C. political insurgents D.free trade
asked by matt 
Math
Food Express is running a special promotion in which customers can win a free gallon of milk which their food purchase if there is a star on their receipt. So far, 147 of the first 156 customers have not received a star on their receipts. What is
asked by Chris 
science
if you wanted to consult the geologic time scale for when the first vertebrates evolved, where would you look?
asked by marissa 
physics
The moon's diameter is 3.48 106 m, and its mean distance from the earth is 3.85 108 m. The moon is being photographed by a camera whose lens has a focal length of 48.5 mm. (a) Find the diameter of the moon's image on the slide film. (b) When the slide is
asked by Anonymous 
Math
Each of two urns contains green balls and red balls. Urn one contains 10 green balls and 8 red balls. Urn two contains 3 green balls and 10 red balls. If a ball is drawn from each urn, what is P(red and red)? A. 23/18 B. 10/27 C. 40/117 D. 18/31
asked by Chris 
precal
"Dr. Tydings has found that, over the years, 95% of babies he has delivered have weighed y pounds, where y8.0
asked by Ilse 
Steve please help!
3. A number cube is rolled 160 times. The number 2 comes up 39 times. What is the experimental probability of rolling a 2? What is the theoretical probability of rolling a 2? A. 39/160; 1/80 B. 1/6; 39/160 C. 39/160; 1/6 D. 121/160; 1/6
asked by Chris 
Chemistry
Which of the following statements is true regarding a covalent bond in CO? Valence electrons are transferred to the oxygen atom. The bond length is less than the sum of the two atomic radii. Bonding electrons are stationary in the CO molecule. all of the
asked by Lue 
History
Can someone please help me? At least give me an idea. I really need some help I'm far behind and this one is really giving me trouble. Please help. Thanks. Select one reform movement from the Progressive Era. Describe the movement and its impact on South
asked by Melissa 
Physics
an open tank contains a layer of oil floating on top of a layer of water (of density 1000 kg/m3) that is 3.0 m thick, as shown. What must be the thickness of the oil layer if the gauge pressure at the bottom of the tank is to be 9.1×104 Pa? The density of
asked by Brady 
Algebra
What is the undefined value of... (3b^2 + 13b + 4) / (b + 4)
asked by Sandra 
physics
A laser emits 1.42 1018 photons per second in a beam of light that has a diameter of 1.82 mm and a wavelength of 524.0 nm. Determine each of the following for the electromagnetic wave that constitutes the beam. (a) the average electric field strength (b)
asked by Anonymous 
math
Jonny wants to place a poster that is 25 1/2 inches wide in the center of a wall that is 60 inches wide. How far from each corner should he place the poster for it to be centered? a. 16 3/4 in b. 17 1/4 in c. 18 1/3 in d. 34 1/2 in my answer is b, anybody
asked by thomas 
Math
Andy needs to pay off a loan of $18,000 in 5 years. Find the amortization payment he would need to make each semimonthly pay period (twice a month)at 6% compounded bimonthly, in order to pay off the loan.
asked by Maria 
Physics
Bioluminescence Some species of dinoflagellate (a type of unicellular plankton) can produce light as the result of biochemical reactions within the cell. This light is an example of bioluminescence. It is found that bioluminescence in dinoflagellates can
asked by Brady 
Chemistry
Help please: A 0.199g sample of unknown metal (X) reacts with hydrochloric acid to produce 88.5 mL of "wet" gas at 20 °C and 754 mm Hg. What is the unknown metal (X)? (The vapor pressure of water at 20 °C is 18 mm Hg.) X(s) + 2 HCl(aq) → XCl2(aq) +
asked by Ally 
math
make a generalization about about dividens and quotients for whole numbers. 42/6=7 8/1=8 12/12=1
asked by Elina 
Chemistry
How would I graph this: (I don't understand the whole with [1/volume] (units=1/mL) on the Xaxis ) According to Boyle's Law, pressure is inversely proportional to volume, so prepare a graph of the data, with [1/volume] (units=1/mL) on the Xaxis and
asked by Ally 
Spanish
Sra. can you please correct my answers? I am so grateful for your help! Part I Answer the questions using the "PRESENT PROGRESSIVE." 1. ¿Qué estáis estudiando ahora? Estoy estudiando español ahora 2. ¿Con quiénes están almorzando ellos? Están
asked by Anna 
Statistics Emergency please
People end up tossing 12% of what they buy at the grocery store (Reader's Digest, March 2009). Assume this is the true population proportion and that you plan to take a sample survey of 540 grocery shoppers to further investigate their behavior. a.Show the
asked by Vanessa 
Physics
A Blowhard Tests of lung capacity show that adults are able to exhale 1.5 liters of air through their mouths in as little as 1.0 second. A. If a person blows air at this rate through a drinking straw with a diameter of 0.49cm , what is the speed of air in
asked by Brady 
6th grade math
A girl's basketball team is playing in the Texas state championship game. They are going 560 miles from El Paso to San Antonio. Their bus yep travels at an average speed of 60 miles per hour. A. Suppose the bus travels at an hour almost steady speed
asked by AT 
physics
In a Young's doubleslit experiment, the angle that locates the second dark fringe on either side of the central bright fringe is 7.2°. Find the ratio d/λ of the slit separation d to the wavelength λ of the light.
asked by Anonymous 
physic II
If the temperature of a gas is increased from 20 to 40 degrees celcius, by what factor does the speed of of the molecules increase?
asked by julide 
Algebra
$6300 is invested, part of it at 11% and part of it at 8%. For a certain year, the total yield is $597.00. How much was invested at each rate?
asked by Pam 
Algebra 1
The height in feet of a baseball after it is hit can be modeled by the function f(x) =16x^2 + 100x, where x is the time in seconds after the ball is hit. Find the ball's maximum height and the time it takes the ball to reach this height. Then find how
asked by Victoria 
math
A bag has 4 red marbles, 4 blue marbles, and 2 green marbles. Jessie draws a marble from the bag at random, notes the color, and then replaces the marble.She then draws a second marble at random.What is the probability that both the marbles are green? a.
asked by thomas 
physics
A singly ionized helium atom is in the ground state. It absorbs energy and makes a transition to the n = 3 excited state. The ion returns to the ground state by emitting two photons. What are their wavelengths of a lower and higher energy photon?
asked by Anonymous 
Math
An experiment involving learning in animals requires placing white mice and rabbits into separate, controlled environments, environment I and environment II. The maximum amount of time available in environment I is 500 minutes, and the maximum amour of
asked by Anonymous 
Algebra
The bar graph which is 4% whole mil, 8% milk for cream and 30% cream shows the milk fat percentages in three dairy product s. How many pounds each of whole milk and cream should be mixed to form 200 lb of milk for cream cheese?
asked by Anonymous 
Math
Barbara invested $12,300 at the Midtown Credit Union at 6% compounded monthly for 7 years. What is the effect rate of this investment?
asked by Mai 
physics
Two blocks are connected by a light string that passes over a massless, frictionless pulley as shown. The coefficient of friction between the 4kg block and the surface is 0.4. Find the acceleration of the system and the tension in the string.
asked by michelle 
biology 4
one strand of DNA could be as long as a football field if it were stretched out lengthwise. One of the factors allowing DNA to fit inside the nucleus of a cell is its ability to: A. break apart into separate genes B. extend to form very long, thick
asked by Hannah 
Physics 1
What is the rotational kinetic energy of the Earth in its orbit around the sun?
asked by Sally 
Math
Tim deposits $10 every month into a retirement account which averages 18% interest compounded monthly. How much will be in this account after 45 years? (The number of years form age 20 to 65))
asked by Mai 
personal finances
A family with $45,000 in assets and $22,000 of liabilities would have a net worth of: A. $45,000. B. $23,000. C. $22,000. D. $67,000. im thinking d
asked by anthony 
math
Tia generated a list of random numbers to simulate an experiment based on the waiting times at a supermarker checkout line.The number 1 represents waiting in line less than 5 minutes and the number 2 represents waiting in line 5 minutes or more.
asked by thomas 
Radioactivity
1. A granite rock is thought to be about 2 billion years old. why is it not possible to determine the age of the Rock using carbon14 dating? 2. A hair sample has 80% of its original carbon14 present. what is the age of the sample? 3. A bone fragment has
asked by Anonymous 
Physics 1
If you see an object rotating, is there necessarily net torque acting on it? Explain
asked by Timothy 
Chem
Write the balanced overall reaction from these unbalanced halfreactions ln>ln^3+ Cd^2+>Cd
asked by Joe 
engineering mathematics 1
your father wants to fence a rectangular area in your backyard for a garden. one side of the garden is along rhe edgeof the yard is already fenced, so you only need to build a new fence along the other 3 sides of rectangle. if you have 80 meter of fencing
asked by athira 
Math
Suppose that è is an angle in standard position whose terminal side intersects the unit circle at ((15/13),(12/13)). Find the exact values of cscè, tanè, and sinè.
asked by Nick 
chemistry
How many gramsof sodium carbonate are neededto make1.30l of0.890m
asked by shae 
Chemistry
If the solubility constant for Ag2CO3 is equal to 8.1x10^12 how many grams of Ag2CO3 will dissolve in a .0001 M solution of Na2CO3?
asked by Jack 
Chemistry
How many nonbonding electron pairs are in an oxygen molecule? I drew it but im unsure if Im correct in saying it has 2 nonbonding electron pairs.
asked by Ally 
physics
What is the de Broglie wavelength of a 5.0eV electron?
asked by Anonymous 
Radioactivity
Beryllium7 has a halflife of 53 D. A sample was observed for one minute and there were 26,880 decays. a.) what is the activity level of the sample? b.) what will the activity level of the sample be after 265 d? c.) after how many days will be activity
asked by Samaira 
Math (Probability)
Mina tosses two number cubes labeled 1 to 6. What is the probability that the sum is equal to 5? A. 1/36 B. 1/9 C.1/6 D.5/36
asked by Anonymous 
Physics 1
Two balls have the same size and mass. One is hollow, the other one is solid. How would you determine which is which without breaking them apart?
asked by Timothy 
chemistry
in the reaction Al2O3= Al+O2 if 742.5 grams of Al2O3 are used how many mols of Al will be produced?
asked by Jake 
Math
Two kids are building a rocket for science class. once the rocket is launched its height in feet, h(t) can be found using the function h(t)=16t^2+128t where t represents time in seconds. They record the time from the moment the rocket launches until it
asked by May 
Physics
How Many Capillaries? The aorta has an inside diameter of approximately 2.1 cm, compared to that of a capillary, which is about 1.0×10−5m (10 μm). In addition, the average speed of flow is approximately 1.0 m/s in the aorta and 1.0 cm/s in a capillary
asked by Brady 
math
manuel and ruben played dominoes 24 times. Ruben has won 16 times. estimate the odds in favor of Manuel's winning the next match.
asked by ray 
Business
This technology allows the online learner to connect to the online school in order to access the courses is called what?
asked by Jenny 
Algebra
Describe the pattern in the table using an equation: xy 115 225 335 445
asked by Caleb Anderson 
TO ANY SCIENCE HELPER
Like say my question was a sample has 80% of its original carbon14 present. How do I determine the age of the sample? Like I don't get how to get the answer, this concept is very difficult for me
asked by Anonymous 
biology 6
the giant anteater of south america, the giant armadillo of north america, the giant pangolin of Africa and the spiny anteater of Oceania share many characteristics. They all eat ants, have long narrow snouts, few teeth and large salivary gland, yet they
asked by Hannah 
Chemistry
Ethanol will combust according to the following equation: C2H5OH(l)+3O2(g)>2CO2(g)+3H2O(l) How many liters of air are required to combust 120.1 g of ethanol at 26.4C and 789.5 mmHg. Assume air is 21% O2 by volume. I cannot find my error  professor states
asked by Joe 
math
{Positive multiples of 4} (Enter your answers as a commaseparated list. Enter only the first three values of this set.)
asked by Anonymous 
chemistry
Find the a)partial pressure of ethylene oxide and b)the total gas pressure, after 30 hours in a reaction vessel at 415C if the initial pressure of ethylene oxide is 782mmHg. k= 2.05x 10^4 t(1/2)=56.3 Part A) I converted hours to seconds, and used the
asked by mae 
comprehending/english
The question is What sources cited or quoted, and if so, to what effect? This is the paragraph: A few months back, while I was giving a workshop on LGBTQIA identities and safety, someone brought up the George Zimmerman trial. In the midst of our
asked by Blaze 
math
A submarine at an elevation of 35 feet rises 35 feet. What is the elevation of the submarine after it rises? a. 70 feet b. 0 feet c. 35 feet d. 70 feet please answer and explain
asked by thomas 
biology
Intravenous saline injections are often given as a treatment for severe dehydration. the concentration of saline (0.9% NaCI) in these injections is that same as that present in human cells. what would happen if pure water was introduced into the the body
asked by Hannah 
biology 2
which organelle produces proteins? A. nucleus B. lysosome C. ribosome D. Golgi body
asked by Hannah 
biology 3
the curled ears of the american curl cat are caused by an autosomal dominant allele. What are the chances of a heterozygous female and a homozygous recessive male producing offspring with curled ears?
asked by Hannah 
Math
How many pounds of coffee worth $7.50 per pound must be blended with coffee worth $9.50 per pound to make a mixture of 12 pounds of coffee worth $8.00 per pound?
asked by Lisa 
statistics
According to an Internet posting, 80% of adults enjoy drinking beer. If a group of 3 adults is selected at random, find the probability that all of them enjoy drinking beer is:
asked by Bertha 
Health
________ is the most frequently reported bacterial sexually transmitted disease in the United States. A. Chlamydia B. Syphilis C. Herpes D. Gonorrhea
asked by Sarah 
Algebra 2
How do I solve these inequalities: e^3x>e^x1 6log (subscript of 4) x > 24 & how do I solve these: 8^x+1=3 e^x+2=50 8logx=16 I really don't understand how to solve these so can someone please explain them to me?
asked by Linda 
Math
The Oscar Drapery Company makes three types of draperies at two different locations. At location 1, it can make 10 pairs of deluxe draperies, 20 pairs of better draperies, and 13 pairs of standard drapes per day. At location 2, it can make 20 pairs of
asked by Anonymous 
Physic II
How much work is done by 3 moles of gas when they triple their volume at a constant temperature of 400 K ? show work please
asked by julide 
Math 221
the equation of a line parallel to the given line but passing through the given point. I can't figure out. y=3x6;(1, 5)
asked by NINA 
Algebra
Solve... (x+12) / (x+4) = (x) / (x+8)
asked by Sandra 
Answer Check; Math
7. Sea turtles lay about 2,500 and 3,000 nests each year, and lay an average of 200 eggs per nest. Only 1 in 1,000 hatchlings will reach maturity. What percent will reach maturity. a. 10% b. 1% (my guess) c. .1% d. .01% 12. It took Mr. E 25 minutes to
asked by Anonymous 
Algebra
Solve? (10 / 3x) + (4/3) = (7 + x) / (2x)
asked by Sandra 
Language Arts
Read the following sentence from the editorial: "We learn that all of our moments can be filled with joy if we only open our hearts to our pets." How is faulty reasoning shown in this sentence? A. The author exaggerates the effect of owning a pet. B. The
asked by Destany 
physics
a window easher pushes his brush up a vertical window at constant velocity by applying a force F as shown below. The brush weighs 12 N and the coefficient of the kinetic friction is 0.2. find the magnitude of force F.
asked by michelle 
Physic II
A technician needs to raise the temperature of a 2 kg block of steel from 25 oC to 700 oC in an annealing process. How much energy, in Joules, must be transferred to the steel to produce this temperature rise? Specific heat=448J/kg C
asked by huruney@ 
English
1. The doctor said I can't play soccer for a month. 2. The doctor said I couldn't play soccer for a month. (Are both grammatical? What is the difference between the two sentence? Thank you.)
asked by rfvv 
accounting
A patent costing $500,000 was purchased on July 1. The company expects the patent to be useful for 5 years. How much amortization expense is reconized on December 31?
asked by Anonymous 
Chemistry
At 25 C, RT/F = (8.314 J/mol/K *298 K) /(96500 C/mol) =0.0257 volts. My textbook lists 0.0592. What am I doing wrong?
asked by Shannon 
Financial services
You want to buy a used alltrain vehicle (ATV) that costs $2800.00. You have 1100.00 in savings and can save $200.00 more a month. Your local credit union offers loans at 6.50% per annum over a term of 12 months. You have a bank credit card with an
asked by Eeyore 
biology 5
which of the following is correct? A. mitosis results in 4 identical daughter cells B. meiosis is used for the production of gametes C. cells go through two series of divisions in mitosis D. daughter cells produced by meiosis contain the same number of
asked by Hannah 
Physics
Find Acceleration and velocity of vault or car(from rest). This is info from the movie Fast 5(Vault Heist). time = 15s Vault ≈ 74,750 lb ≈ 33,903.03 kg Car ≈ 1900 kg Money in vault ≈ 4,900 kg Estimate coefficient (tires & concrete) ≈ 1 Estimate
asked by Renee ( PLEASE HELP ME) 
Math 3
The mean surface temp of the moon is 107 degrees celsius.if the mean surface is 153 degrees celsius. How much warmer is it in the day than at night time?
asked by Jenny 2 
science
If you see that a hotair balloon is rising above the top of a hill, what is the top of the hill called?
asked by isaiah 
Physics
The cars (2 cars) are pulling a vault out of the wall of a police station. What is the acceleration and velocity from rest? This question comes from the vault heist scene in the movie Fast 5. you can use what even distance and time to find it. The weight
asked by Renee ( PLEASE HELP ME) 
physics
compute the kinetic energy of an 1800 lb automobile traveling at 30 mi/hr. how many times as great is the kinetic energy if the velocity is doubled? compute the kinetic energy, in erg and in joules, of a 2 gram bullet travelling at 500 m/sec.
asked by Anonymous 
Psychology/English
Jane Eyre was orphaned as a child. What do you think is the psychological effect?
asked by Anonymous 
Health
The ________the concentration of HIV in semen or genital fluids, the more likely it is that HIV will be transmitted to a sex partner. A. Lower B. Weaker C. Higher D. All of the above
asked by Sarah 
Algebra
A boy was sent with $2.10 to buy oranges. He found the price 3 cents higher per dozen than he had expected to pay, and so he bought 6 fewer oranges than he had intended to buy and received 1 cent in change. How much did he pay for a dozen oranges?
asked by Summer 
Math
If a number of 2 digits is divided by the sum of its digits, the quotient is 2 and the remainder is 2. If it's multiplied by the sum of its digits, the result is 112. Find the number.
asked by Erica 
TO ANY SCIENCE HELPER
I honestly don't get how to use radioactive dating to determine the age of a sample. I need an example and what to do in order to get the answer. I need it to be step by step. Thank u so much :)
asked by Anonymous 
Math
The GoodMentalHealth Insurance Company has determined the number of new clients a psychologist gets per month and their respective probabilities, as shown in the table below: Number of New Clients Probability 0 0.05 1 0.10 2 0.15 3 0.35 4 0.20 5 0.10 6
asked by Sally 
Language Arts
Which of the following statements from the editorial shows bias? A. Studies have shown the healthrelated benefits of pets. B. That animal depends on you. C. Thus, all pet owners are caring people. D. Everyoneyes, everyoneshould have a pet. I'm really
asked by Destany 
Language Arts
Which is the best way to clarify the sentence "The few arguments against pet ownership scarely need to be mentioned"? A. Most people favor pet ownership, but the author believes that the arguments against it are strong. B. Few people can provide reasons
asked by Alexander 
Math
Solve by elimination x + 2y = 7 x  5y = 7
asked by Tyler 
SS
If a country wants to help another country through foreign investment, what can it do? How can it do the foreign investment?
asked by Anonymous 
Math
Can someone please work out the steps in solving this elimination problem. Thank you. The problem is x + 2y = 7 x  5y = 7
asked by Tyler 
personal finances
If creditors add finance charges after subtracting payments made during the billing period, this is called the: A. APR method. B. average daily balance method. C. previous balance method. D. adjusted balance method. its not A or D someone help me
asked by tony 
finances
In a Chapter 7 bankruptcy, a debtor: A. is required to draw up a petition listing all assets and liabilities. B. does not have to pay a filing fee. C. is absolved of alimony and child support payments. D. does not have to repay educational loans.
asked by tony 
Math 4
Temp. In degrees is 19 degrees Fahrenheit. A blizzard moved in and brought lots of snow and lowered temp. By 27 degrees Fahrenheit, what was the final temp. In Fahrenheit during the blizzard?
asked by Jenny 2 
Education
How do I compare and contrast learning as a process and learning as a product.
asked by Cathy 
Physics 1
What torque is needed to accelerate a 70Kg disk with a 20 cm radius from rest to 10 rad/s?
asked by Sally 
SS
What are some things that Turkey has that Qatar doesn't?
asked by Anonymous 
SS
What is foreign investment? Please explain in simple terms.
asked by Anonymous 
geometry
the set of lessons in this geometry course is:
asked by kim 
science
What are psychoanalytical models? How have these models been used to explain human behavior? Which model do you feel is the most effective in explaining human behavior? Why?
asked by tania 
math homework
What is the perimeter of a triangle whose sides measure 21cm, 16cm, and 19cm?
asked by karla 
College Math
Alberta adds 9 songs to her mp3 player every mont. After 5 months she has 55 songs solve for y
asked by Felicia 
English Composition
What would be 5 reasons parents won't let a kid go out alone with friends?
asked by Anonymous 
la
what is the adjective of the sentence The boys on the soccer team will go across the street, through the alley, and into the park.
asked by quint 
Stats
Find the Pvalue for a left tailed hypothesis test with a test statistic of z= 1.77. Decide wether to reject the null if the level of significance is alpha= 0.05. Please help I've tried everything and I can't figure out how to get the right answer..
asked by Christina 
math
how to get a triangle shape out of a parallelogram?
asked by areeba 
social studies
What were the results of the Korean War? What impact did it have on American society?
asked by Tyler 
algebra
y= (the square root of 8) + x determine whether the following are square root functions. explain
asked by don't trip 
Calculus
Given f(3)=4 and f'(3)=5, find g'(3), where g(x)=8x.f(x)
asked by Michelle 
American History
Passed in 1935, Roosevelt's most significant reform measure was the what?
asked by erin 
SS
How can Lebanon help in the development of the UAE (without the involvement of oil)?
asked by Anonymous 
Calc
Last question! Thanks! Given f(3)=4 and f'(3)=5 find g'(3) where g(x)= 5x/f(x)
asked by Michelle 
Chemistry pH
A 0.60 M solution of a weak acid, HA, has a pH of 3.72. What is the percentage ionization of the acid? What is the value of Ka for the acid?
asked by Penny 
chemistry
How many calories will 45 grams of water release when it changes fom 85c to 30c?
asked by mark 
Astrology
Why is it helpful to use the Celestial Sphere to find the position of objects in the night sky. Please help!, Thank you.
asked by Cherie 
Math 2
Simon and his team are preparing to climb my. Sinclair. Base camp is located 21 feet below sea level. Mt. Sinclair is 490 feet above sea level. on the 1st stage of their climb, they will camp at a ranger station located 124 feet above sealevel. The next
asked by Jenny 2