Questions Asked on
July 9, 2013

Stitistics
An oil change company advertises that they can change the oil in your car in 15 minutes. Based on the data collected below, what is the probability that oil change will take more than 15 minutes? Using this example as a template, post a similar example
asked by Sandi 
science
Define water equivalent of a calorimeter. State its SI unit.
asked by ram 
statistics
A manufacturer of fishing line claims that by using machines, rather than people, at the assembly plant that this will reduce the amount of defects in the line. Currently the defective rate is 15 per 1000 ft. Which is the correct null hypothesis?
asked by Anonymous 
statistics
The respiratory rate per minute in newborns varies according to a distribution that is approximately Normal with mean 50 and standard deviation 5. The proportion of observations from a standard Normal distribution that take values less than 1.15 is about
asked by Jen 
maths
Suppose p(x)=ax^2+bx+c is a quadratic polynomial with real coefficients and p(x)≤1 for 0≤x≤1. Find the largest possible value of a+b+c.
asked by maths 
physics
The efficiency of a machine is in general defined as the ratio between useful (released) energy and the input energy. Therefore, the exact formulas for efficiency depend on the purpose of the machine. What's the difference in the maximal efficiency of a
asked by maths 
Chemistry
Fe3O4 reacts with CO according to the equation Fe3O4 + 4CO => 4CO2 + 3Fe If 478.9 g Fe3O4 is reacted with excess CO, what mass of CO2 will be produced?
asked by Anonymous 
economics
the performance of S.A economy from jan2009 to dec2011
asked by stephen 
Montessori
What is the greatest odd number that would be produced when 660 is rounded off to the nearest hundreds?
asked by Blue 
Monessori
What is the greatest number that would be produced when 750 is rounded off to the nearest hundreds?
asked by Blue 
maths
A subset S of {1,2,…,n} is said to be packed if whenever i,j∈S the number ⌊(i+j)/2⌋ is also in S. Determine how many subsets of {1,2,…,25} are packed. Details and assumptions i and j need not be distinct. If i=j is in the set, then clearly so is
asked by maths 
Physics (help steve)
A helium ion is at rest in a laboratory when it is put in an electric field of E=2 N/C. An infrared light, of wavelength 2000 nm, is directed towards the ion. The ion is moving towards the source of radiation. After what time in the laboratory frame in
asked by Kay 
Physics (help steve)
A boy is spinning on a chair and holding a paper bag so that it is horizontal, and perpendicular to the axis of the rotation. What should be the angular velocity of the boy in radians/second so that the bottom of the bag breaks? Details and assumptions
asked by Kay 
Physics (help steve)
Exact solutions for manybody problems are rarely encountered in physics. The following problem deals with a nontrivial motion of four charges. Due to the symmetry of the problem it is possible to determine the trajectories of the charges analytically.
asked by Kay 
Number System
Converts binary 110111011 to hexasecimal.
asked by Jnr John 
Number System
Add the following numbers: 1110 1011 101 + 101 1111 + 1111 =
asked by Jnr John 
Number System
Subtract the following numbers using the standard method. 111 1110 0010  100 0111  111 =
asked by Jnr John 
Conversions
The parallel sides of a trapezium are 10m and 14m. If the area of the trapezium is 130 square meter, what is the distance between the parallel sides? Convert the answer into square yards.
asked by Jnr John 
Prisms
The solid prism has constant cross section which is a trianle sides 8cm, 7cm and 7cm long respectively. If the lenght of the prism is 9cm, calculate the volume of the prism.
asked by Jnr John 
Prisms
A swimmin bath has verticle sides and the floor slopes uniformly so that, when the bath is full, the water is 1m deep at the shallow end and 4m deep at the other end. If the bath is 25m long and 12m wide, calculate the volume of the water in the bath when
asked by Jnr John 
ENGLISH STORY
What i the story of the last butterfly ?
asked by May 
science
give the value of acceleration due to gravity
asked by michelle 
mathematics
Hi, I'm not sure if I'm giving the correct answer for this problem. The question states; The values of computers in the years after its purchase date are listed in the following table. Year 0=1500, Year1=1200, Year2=1100,Year3 +1000, Year 4 = 800, Year 5
asked by Joan 
maths
A factory produces two products A and B using raw materials p and q. It uses 3 units of p and 1 unit of q to produce one unit of A. It uses 1 unit of p and 2 units of q to produce one unit of B. The maximum daily supplies are 330 units of p and 220 units
asked by maths 
heeeelp math
Find the number of polynomials f(x) that satisfy all of the following conditions: f(x) is a monic polynomial, f(x) has degree 1000, f(x) has integer coefficients, f(x) divides f(2x^3+x)
asked by lin 
chemistry
A piece of aluminium weighing 2.7 gm is heated with 75 ml of H2SO4(specific gravity 1.18 containing 24.7 percent H2SO4 by weight.)After the metal is carefully dissolved,the solution is dissolved to 400ml.Calculate tne molarity of the free H2SO4 in the
asked by Anonymous 
heeeeeeeeelp math
For every positive integer n consider all polynomials f(x) with integer coefficients, such that for some real number a *x(f(x+a)−f(x))=n*f(x) Find the largest possible number of such polynomials f(x) for a fixed n
asked by lin 
TRIGONOMETRY
Suppose tan theta=15pi/18 is less than theta 3pi/2 , what are the other trigonometric functions?
asked by NOEL 
Calculus
Find the area of the shaded region bounded by y=7x and y=x(sqrt(22^2x^2))
asked by Annie 
cananyone solvethis math
A subset S of {1,2,…,n} is said to be packed if whenever i,j∈S the number ⌊(i+j)/2⌋ is also in S. Determine how many subsets of {1,2,…,25} are packed. Details and assumptions i and j need not be distinct. If i=j is in the set, then clearly so is
asked by lin 
Physics
What is the electric field at a point midway between a 7.34 micro coulombs and a +4.49 micro coulombs charge apart 31.5m apart?
asked by Amalia 
Physics
Calculate the coulomb force on q. They are all in a straight line q1, q2,q3. Q1:1.05 micro coulombs Q2:5.51 micro coulombs Q3:2.15 micro coulombs The distance, r1, between q1 and q2 is 20.1cm. The distance, r2, between q2 and q3 is 15.3 cm. Also,
asked by Amalia 
Calculus
Find the volume of the solid obtained by rotating the region under the graph of the function f(x) = (2)/(x+1) about the xaxis over the interval [0,3]
asked by Annie 
maths
the tens digit of a two digit number is 5 more than the units digit. when reversed and added to the original number the answer is 99. find the original number.
asked by ria 
Statistics
The following risk ratios give the increased risk for various diseases comparing two groups (exposed vs. unexposed). a. 2.5 (2.0, 3.0) b. 1.03 (1.02, 1.04) c. 6.0 (.85, 9.8) d. 0.98 (0.88, 1.08) e. 0.20 (.05, 1.05) Which risk ratios are statistically
asked by Mike 
Computers C++
1). The name of an array stores the __________ of the first array element. 1) memory address 2) value 3) element number 4) subscript 5) None of these
asked by Thomas 
Math
Let V be the volume of a pyramid of height 15 whose base is a square of side 5. Part a). Use similar triangles to find the area of the horizontal cross section at a height y. Part b). Calculate V by integrating the crossssectional area.
asked by Molly 
Math: Calc 2
Find the volume of the solid obtained by rotating the region under the graph of the function f(x) = x^(13/12) about the xaxis over the interval [1,3]. Thanks!
asked by James 
math
What is the standard form of the number 2x1 + 4x1/10 + 9x 1/1,000.
asked by sam 
physics
A 600 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is its average power output in watts and horsepower if this takes 7.30 s?
asked by Deborah 
math
1. A hotel has 120 rooms. If the number of double room is 8 more than three times the number of single rooms, how many single rooms does the hotel have? 2. A mechanic earns $5 more per hour than his helper. On a sixhour job the two men earn a total of
asked by gary 
Child Development
Which of the following groups requires more irregular scheduling than the other three groups? A. 12to 18 monthsold B. 3t0 5 years old C. school age children D. 18  to 36 months old My answer is C can someone check my answer please
asked by Brenna 
math
Nakim simplified 3 times the square root of 2x plus x times the square root of 8x minus 5 times the square root of 18x and got 10x times the square root of 2x for an answer. Part 1: Using complete sentences, explain what Nakim did wrong. Part 2: Show all
asked by kidd 
GEOMETRY LATERAL AND SURFACE URGENT (PLEASEHELP)
1.A RECTANGULAR BOX IS TO BE PAINTED ON ALL ITS SIDES. IF THE BOX IS 15 DM LONG, 12 DM WIDE AND 6 DM HIGH. HOW MUCH SURFACE IS TO BE PAINTED ? 2. IF EACH SIDE OF AN OPEN CUBICLE BOX IS 2X+3 CM. FIND ITS TOTAL SURFACE AREA. 3. MICHEAL IS TO MAKE A BOX IN
asked by Mia 
math
find the minimum and the maximum possible areas of a rectangle measuring 2 km by 5 km
asked by erianna 
Phoenix University
2.You are the head of the health information management department at General Hospital. An FBI agent has arrived at your office with a search warrant in hand. He asks to speak with you about the hospital’s health record. How should you respond?
asked by Stephy 
Math 17 Synthetic Division
Using synthetic division, divide (x^6)(y^6) by xy. please show the process. THANK YOU! :)
asked by Rob 
algebra
Simplify 2(x+3) 5(x4)
asked by Anonymous 
math
There are 360 people at a museum opening. Half of the people are museum supporters, 3/8 are artists, and the rest are museum employees. How many people are artists ?
asked by sam 
Chemisty Please help!
What mass of a 0.66 molality ammonium nitrate (80.04g/mol) solution will contain 0.15 mol of solute?
asked by Kelly 
Chemistry
Gasoline is primarily a mixture of hydrocarbons and is sold with an octane rating that is based on a comparison with the combustion properties of isooctane. Gasoline usually contains an isomer of isooctane called tetramethylbutane (C8H18), which has an
asked by Kelly 
america government
precedent, while not absolute constraint on the courts,is needed
asked by Anonymous 
physics
The electric potential in a certain region is V = a x2 + b x + c, where a = 14 V/m2, b = −19 V/m, and c = 61 V. Determine the position where the electric field is zero. Answer in units of m Please help!
asked by Kennedy 
GEOMETRY
2. IF EACH SIDE OF AN OPEN CUBICLE BOX IS 2X+3 CM. FIND ITS TOTAL SURFACE AREA.
asked by Mia 
HCA/220
I have a final due within this week. I have to create a 1520 slide power point presentation storyboard. I do not know which one to pick; either a medical documentary or a training presentation for new hires. I have to include 45 medical words. Can someone
asked by Purple 
Math
a rectangular prism has a length of 1/2 fofoot and a height of 1/4 foot. what is the width of the right rectangular prism if its volume is 1/4 foot?
asked by andra 
math
In a class of 80 seniors, there are 3 boys for every 5 girls. In the junior class, there are 3 boys for every 2 girls. If the two classes combined have an equal number of boys and girls, how many students are in the junior class?
asked by allie 
Economics
GDP=375 Government spending increases by 50 Taxes increase by 50 MPC=.9 What is the new equilibrium GDP?
asked by Shan 
Economics
GDP=500 Government spending decreases by 20 Taxes increase by 20 Investment decreases by 20 MPC=.8 What is the new equilibrium GDP?
asked by Shan 
Child Development
When preparing an environment for school aged children the caregiver should ensure that the A. outdoor area allows them to continually challenge their physical ability B. Children are continually intermixed with the younger children C. Environment
asked by Brenna 
socials 11
explain how the clothing women wore during the 1920s was indicative of their changing role.
asked by alyssa 
College Physics
1. In a region of twodimensional space, there are three fixed charges: +1 mC at (0, 0), −2 mC at (18 mm, 3 mm), and +3 mC at (8 mm, 12 mm). What is the net force on the −2mC charge? Find the magnitude and direction (counterclockwise from the
asked by Joshua 
Government
1. The U.S. Constitution's Article I, Section 1 created the office for the U.S. president. A) True B) False 2. The term of office for a House member is two years. A) True B) False 3. Two requirements for members of the House are that they must be 25 years
asked by Allison 
College Chemistry
Calculate the pH at the equivalence point if 25.00 mL of 0.010M barbituric acid (HC4H3N2O3) is titrated with 0.020M NaOH. (Ka barbituric acid = 1.0 x 10^5)
asked by Mary 
Physics
A 3.21 kg mass attached to a light string rotates on a horizontal, frictionless table. The radius of the circle is 0.855 m, and the string can support a mass of 15.3 kg before breaking. What maximum speed can the mass have before the string breaks? Answer
asked by Lynn 
MUSIC
What is meant by Caribbean music in a new mode What emphasis, in this chapter, seems to justify a departure from traditional presentations of music and culture of the Caribbean?
asked by Kim 
Math Geometry
a shipping crate carrying e readers has a length of 19 1/3 feet, a width of 7/23 feet, and a height of 7 5/6 feet. Whaat is the volume of the shipping crate? Show your work. i know V=lwh , but I'm getting the wrong answer! Please help.
asked by andra 
(pls help) physics
(Q1) A 50kg boy suspends himself from a point on a rope tied horizontally between 2 vertical poles. the 2 secments of the rope are then inclined at angles 30degrees and 60degrees respectively to the horizontal. The tension in the sefments of the rope is
asked by ikye 
algebra
Determine the quadratic function f whose vertex is (3,2) and passes through(1,6) f(x) = ax^2 + bx + c
asked by Chris 
Math Geometry
a shipping crate carrying e readers has a length of 19 1/3 feet, a width of 7/23 feet, and a height of 7 5/6 feet. Whaat is the volume of the shipping crate? Show your work. i know V=lwh , but I'm getting the wrong answer! Please help. I got 58/3 x 23/3 x
asked by andra 
Physics
Both drawings show the same square, each of which has a side of length L=0.75 m. An observer O is stationed at one corner of each square. Two loudspeakers are locate at corners of the square, as in either drawing 1 or drawing 2. The speakers produce the
asked by Vivien 
math
There are 35 students in a class who stu dy either art or music, 15 study art. Twice as many students who study art study music. COMPLETE THE VENN DIAGRAM TO SHOW. Art only MUSIC ONLY art and music
asked by RAHEEM 
Child Development
A/an is a chracteristic of children at age five A. understanding of ramifications of one's action B. desire to play with children of different ages C. awardness with emerging motor skills D. slowing down of growth and development my answer is (D) can
asked by Brenna 
Number and Operations
when 20 is divided by a positive integer n, the remainder is 2. how many possible values are there for n?
asked by Anonymous 
Physics
A satellite moves in a circular orbit around the Earth at a speed of 5.9 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 1024 kg. The value of the
asked by Lynn 
chemistry
Outline a separation scheme for isolating pure isopentyl acetate from the reaction mixture. ( post lab question for the Banana oil lab)
asked by chelsea 
bisic gramma
Which of the following is not a common sentence error
asked by linda 
math
Plywood is sold in rectangle sheets 4 feet wide and 8 feet long. How many 4x8 sheets of plywood are needed to completely cover a rectangle shaped floor measuring 16 feet by 12 feet. 6 7 8 9 32 192
asked by help me!!! 
Physics (mechanics)
A ucontrol airplane of mass m is attached by control wires of length L and negligible mass to the "pilot" who controls the lift provided by the wing FL. The wires control the plane's elevator or angle of attack. The plane's engine keeps it moving at
asked by JK 
Physics
In Larry Niven’s science ﬁction novel Ringworld, a ring of material of radius 1.54 × 1011 m rotates about a star with a rotational speed of 1.5 × 106 m/s. The inhabitants of this ring world experience a normal contact force ~n. Acting alone, this
asked by Lynn 
Physics
The pendulum is transported to another planet where the acceleration due to gravity is smaller.
asked by Anonymous 
Physics
For each of the following scenarios, indicate whether the oscillation period of the block becomes shorter, longer or remains unchanged. Note: you must clearly mark your answer (for example, highlight it in red) from the multiplechoice list below and you
asked by Anonymous 
Geometry
I have two post that meet the ground perpendicular and the ground is level. One post is 40 feet high, the other is 25 feet high. If I draw a hypotenuse from the top of one post to the base of the other post and another hypotenuse from the top of the other
asked by Josh 
math
Can someone help me with this question i've spent hours on it!!:( 6. Eight square tiles are laid out on a table so that they make a solid pattern. Each tile must touch at least one other tile along an entire edge. The squares all have sides of length 1.
asked by Kaitlin 
english
what motivates us as writers and viewers to create and interact with characters through pieces of work such as " a beautiful mind" (movie. This is our essay question. what topic and 3 arguments could i talk about in my essay
asked by sarah 
Physics
7. Which of the following object(s) would be suitable for building a functional clock? Note: you must clearly mark your answer (for example, highlight it in red) from the multiplechoice list below and you must provide an explanation of your answer(s) to
asked by Anonymous 
help please
When a person has episodes of hypomania that shift back and forth with mild depression for at least two years, he or she has what form of bipolar disorder? A. Bipolar II Disorder B. BPNOS C. Bipolar I Disorder D. Cyclothymic Disorder D??
asked by Anonymous 
Algebra 2...
At 1:00 a.m, a homocide detective found the reading of a corpse's body temperature to be 88 degrees Fahrenheit . One hour later, the body temperature is 83 degrees Fahrenheit. If the body has been in a 74 degrees Fahrenheit room since its death, what is
asked by Anonymous 
Algebra 2.
1. Negative Absolute Value x+4 ABV
asked by Anonymous 
Economics
GDP=520 Government spending decreases by 15 Taxes decrease by 20 Investment increases by 30 Net Exports decrease by 30 MPC=.75 What is the new equilibrium GDP?
asked by Shan 
Economics
GDP=500 Government spending decreases by 20 Taxes increase by 20 Investment decreases by 20 MPC=.8 What is the new equilibrium GDP?
asked by Shan 
Physics
A 0.363 g wire is stretched between two points 80.3 cm apart. The tension in the wire is 573 N. Find the frequency of first harmonic. Answer in units of Hz
asked by Help Me Please 
MATH:( Base systems?!
2. Determine the base five representations for each of the given numbers. Remember that a numeral with no subscript is understood to be n base ten. a.47 b. 179 c. 354
asked by Kaitlin 
Chemistry
Calculate the mass (in mg) of KCN needed to make 500. mL of aqueous KCN solution with a pH of 10.00. The Ka of HCN = 5.0 x 1010. I got the answer 7.8 mg but it's wrong. Can someone please explain how to do it?
asked by Nat 
Probllem solving and critical thinking
what is the premise of this argument:2. If the library has The Lord of the Rings, you won’t find it on the first floor. This is because all fantasy novels are fiction and all works of fiction are housed on the second floor of the library. Of course, I am
asked by Anonymous 
Health Ethics
are laws and regulations the problem or the solution in addressing ethical problems? what is the alternative? explain your answer in 200 words or more
asked by kat 
Physics
An olympic sprinter can run 100yd in 9.0s. At the same rate, how long would it take the sprinter to run 100m?
asked by Tracy 
math
Purchase price of article = $3,000 Down payment = $0 Number of payments = 36 Monthly payment amount=$93.33 True Annual Interest (to the nearest tenth) = a0 %
asked by sarah 
physics
A dolphin experiences a force of 320 N [up] when it jumps out of the water. The acceleration of the dolphin is 2.6 m/s 2 [up]. (a) Calculate the mass of the dolphin. (b) What would be the acceleration of the dolphin if it had the same strength but half the
asked by jake 
math
The total price of an article is $7.02, including tax. If the tax rate is 8%, what is the retail price of the article?
asked by sarah 
physics
A 78kg parachutist, in the first few seconds of her jump, accelerates at a rate of 7.4 m/s2 [down]. Calculate the force she experiences due to air resistance.
asked by jake 
physics[
Consider a spacecraft whose engines cause it to accelerate at 5.0 m/s2. (a) What would be the spacecraft’s acceleration at a later time if half its fuel has been used up? (b) What assumptions have you made in order to answer (a)?
asked by jake 
Spanish
Sorry for the backwards accents I just got a new keyboard, so I don't know how to do the spanish accents yet. I hope a got more right this time 1. Camarero, ¿me trae ________? Quiero pedir un postre. A. El mantel B. el menú C. la servilleta D. la
asked by Eri Uchi 
math
Your station charges $16.50 for a lubrication job. As a promotion you sell six coupons for lubrication jobs for $90. What percentage discount are you offering for customers who purchase the 6coupon lube book? Discount (to the nearest tenth) = % The answer
asked by sarah 
Computer Programming
I'm trying to create a vba code that solves this problem: 50 apartment units rent for 600 a month, for each 40 dollar increase in rent a unit becomes unoccupied. I want to find the max profit and number of units at that number. Sub Rent() Dim Rent As
asked by Dom 
Physics
A phone cord is 2.85 m long. The cord has a mass of 0.254 kg. A transverse wave pulse is produced by plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0.758 s. What is the tension in the cord?
asked by Physics Hates Me 
statistics
Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30second segments from “The Collection from the Best of Classical Music.” After listening to a segment, the students rated it on a
asked by carrie 
history
During the election of 1936, declaring their party a "millionaire's union," Franklin Roosevelt focused mainly on defeating the A. Union Party running Gerald K. Smith. B. Liberty League running Father Coughlin. C. Union Party running William Lemke. D.
asked by tesha 
MATH
Compute the volume of the solid obtained by rotating the region in the first quadrant encolsed by the graphs of the functions y = x^2 and y = sqrt(x) about the yaxis. I keep getting (1/3)pi and can't figure out what I'm doing wrong!
asked by Cara 
MATH HELP
Find the volume of the solid obtained by rotating the region underneath the graph of f(x) = (x)/sqrt(x^3+1) about the yaxis over the interval (1, 10)
asked by Cara 
Excel
Say this is my cell: 2013 *aaron e. pacheco*9743 2nd Avenue*Boca 33431 *pacheco@fau.edu*9049 how would i use the text function to extract the first, middle, and last names from a list of cells like the one above with differing name lengths? and possibly
asked by Dom 
math
Suppose you want to represent a triangle with sides 12 feet, 16 feet, and 18 feet on a drawing where 1 inch = 2 feet. How long should the sides of the triangle be in inches? The sides of the triangle on the drawing should be inches, inches, and inches.
asked by sarah 
math
I have the problem ((square root of h^2+4h+5)(square root of 5))/h. I am supposed to be finding the limit as h approaches 0 from the right. We are supposed to solve it algebraically and I believe I should be using a the conjugate but I am not exactly sure
asked by Nat 
math
A sphere has a radius of 3.5 inches. Volume (to the nearest tenth) = cubic inches The answer that I got was 179.6. It is wrong ! i I miss a step?
asked by sarah 
PHYSICS
An airplane is flying straight and level at a speed vo = 150 mph and with a constant time rate of increase of speed v' = 20 ft/s^2, when it starts to climb along a circular path with a radius of curvature p = 2000 ft. The airplane maintains v' constant for
asked by ROCKY 
math
what is missing number for magic square for 22, 111,72, 131
asked by aj 
math
Labor rate = $12 per hour Hours worked = 36 Overhead rate = 125% Retail price of good furnished = $185 Sales tax rate = 7% Total bill for services and parts = $ The answer that I got was 762.80. Can you check my answer.
asked by sarah 
French
In order to say "This city is in France," we can say "Cette ville est en France." But, why is it that we say "Cette ville est aux EtatsUnis" for "This city is in the United States?" I don't exactly understand the difference between "en" and "aux."
asked by Anonymous 
College Algebra
A rancher has 100 meters of fencing to enclose two adjacent rectangular corrals (see figure). The rancher wants the enclosed area to be 374 square meters. What dimensions should the rancher use to obtain this area? (Round your answers to 2 decimal places.
asked by Jack 
College Algebra
Use the position equation given below, where s represents the height of the object (in feet), v0 represents the initial velocity of the object (in feet per second), s0 represents the initial height of the object (in feet), and t represents the time (in
asked by Jack