
calculus
The base of a solid consists of the region bounded by the parabola y=rootx, the line x=1 and the xaxis. Each cross section perpendicular to the base and the xaxis is a square. Find the volume of the solid.
asked by Caitlin on June 6, 2012 
AP physics
A particle moving uniformly along the x axis is located at 17.9 m at 1.45 s and at 3.9 m at 2.7 s. Find its displacement during this time in terval. Answer in units of m What is the average velocity speed during this time interval. Answer in units of m/s
asked by Laura on September 30, 2012 
Calculus 1
Use Newton's method with initial approximation x1 = −2 to find x2, the second approximation to the root of the equation x^3 + x + 1 = 0. *I got 1.307692 for my answer but it said that was wrong, so then I tried rounding it to two decimal places and got
asked by TayB on November 12, 2015 
statistics
A company decides to investigate the amount of sick leave taken by its employees. A sample of seven employees yields the following numbers of days of sick leave taken in the past. 0, 1, 4, 1,6, 2. Find and interpret the range
asked by T. on February 27, 2011 
math
A boy is cycling such that the wheels of the cycle are revoloving 140 times per minute.if the diameter of the wheel is 60 cm,calculate the speed per hour with which the boy is cycling. Find answer in km per hour
asked by anuj on January 12, 2018 
Physics
F1 and F2 are two horizontal forces of 70 N each, acting on a wagon. They are at 45° to the xaxis and at right angles to each other. A third force, F3, also 70 N, acts along the positive xaxis. What if, instead, F2 acted in the opposite direction from
asked by arcos15 on September 23, 2012 
Algebra
15. A boat travels 30 miles upstream in 4 hours. The trip downstream takes 2.5 hours. Find the rate of the boat in still water. 33. Solve the following: (q + 2)^2 = 25 34. Solve the following: y^2 + 6y + 9 =49 39. How many real roots are there for the
asked by mysterychicken on June 13, 2010 
Calculus
Find the equation (in terms of x and y) of the tangent line to the curve r=3sin3(theta) at theta=pi/4. I don't know if I'm taking the right approach for this question but her goes what I did: I found the slope I got
asked by Jessica on October 13, 2011 
Chemistry
A concentration cell consists of the same re dox couples at the anode and the cathode, with different concentrations of the ions in the respective compartments. Find the un known concentration for the following cell. Pb(s)  Pb2+(aq, ?)  Pb2+(aq, 0.1
asked by David on April 21, 2013 
Algebra 2
how do i do these problems???? Graph each pair of equations in the same coordinate plane. Find the coordinates of the point where the graphs intersect. Then show by substitution that the coordinate satisfy both equations. 1. 2x + 5=0 2x + y=8 Graph each
asked by Jessica on August 17, 2010 
+1 SCIENCE
AN INSECT TRAVELS IN A CIRCULAR MOTION AND IT TRAVELS 6 ROTATIONS AT A TIME 31.4 SECOND FIND THE ANGULAR VELOCITY OF THE INSECT AND OBTAIN THE EXPRESSION FOR CENTRIPETAL ACCELARATION IN TERMS OF ANGULAR SPEED?
asked by FATHIMA on August 28, 2011 
Geometry
Two sides of a rhombus form a 120º angle. The length of each side is 6 in. Explain how to find the area of the rhombus, and then calculate the area. Leave your answer in simplest radical form.
asked by Rachel on February 14, 2012 
math
Suppose that people's heights (in centimeters) are normally distributed, with a mean of 175 and a standard deviation of 6. We find the heights of 40 people. (a) How many would you expect to be between 169 and 181 cm tall? (b) How many would you expect to
asked by apryl on August 25, 2011 
physics
A grasshopper jumps a horizontal distance of 1m from rest, with an initial velocity at a 45 degree angle with respect to the horizontal. Find the initial speed of the grasshopper and the maximum height reached.
asked by zara on September 28, 2014 
math
The angle of elevation of the top of a tower is 45degree from a point 10m above the water level of a lake.From the same point, the angle of depression of its image in the lake is 60degree.Find the height of the t
asked by Anonymous on February 9, 2018 
math
. Given the following function, f(x)=x^2 8x find: (a) vertex, (b) axis of symmetry, (c) intercepts, (d) domain, (e) range, (f) intervals where the function is increasing, (g) intervals where the function is decreasing, and (h) the graph of the function.
asked by mz tee on November 10, 2011 
math
Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 158 and 172 cm tall? 1 (b) How many would you expect to
asked by Anonymous on August 29, 2012 
algebra
Suppose that people's heights (in centimeters) are normally distributed, with a mean of 175 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 167 and 183 cm tall? (b) How many would you expect to
asked by apryl on August 28, 2011 
maths
(a) Find the points which divide the line joining A(1,3) and B(4,1) internally in the ratios: (ii) 1:1 (iii) 3:1 (b) On the same xy axes plot the point A(1,3) and B(4,1) and draw the line joining them. Add the three points which you calculated in part
asked by Steve on November 3, 2016 
math
In Scrabble, 2 of the 100 tiles are blank. Find the probability of drawing a blank tile from an entire set of Scrabble tiles. Write your answer as a fraction, as a decimal, and as a percent.
asked by Anonymous on March 9, 2016 
10th grade History
What congressmen had sons who fought in the Vietnam War? What were the names of the Congressmen & sons? There were 28 total, 19 who saw combat. I found that info on one web site. I looked through many other sites, and can not find their names.
asked by John on September 10, 2009 
algebra
Explain why the pointslope formula cannot be used to find the equation of a line that is parallel to the yaxis. When graphing the equations y =2x 2,y=2x.and y = 2x + 3, what observation can you make about the graphs. Can you make the same observation
asked by Sissy needs help on February 15, 2012 
maths very hard
(a) Find the points which divide the line joining A(1,3) and B(4,1) internally in the ratios: (i) 1:2 (ii) 1:1 (iii) 3:1 (b) On the same xy axes plot the point A(1,3) and B(4,1) and draw the line joining them. Add the three points which you calculated
asked by Liam on November 3, 2016 
Answer
A company decides to investigate the amount of sick leave taken by its employees. A sample of seven employees yields the following number of sick leave taken in the past year 1 1 3 0 1 7 1 a. Find and interpret the range
asked by Anonymous on February 28, 2011 
CHEM
A 1.000g mixture of As4S6(s) and As4S4(s) was burned in excess O2. The products were As4O6(s) and SO2(g). The solid product had a mass of 0.905g. Find the mass % of As4S4(s) in the original mixture.
asked by ANN on September 30, 2014 
math
Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 60 people. (a) How many would you expect to be between 158 and 172 cm tall? 1 (b) How many would you expect to
asked by Anonymous on August 28, 2012 
early trig
A monument stands on level ground. The angle of elevation of the top of the monument, taken at a point 425 feet from the foot of the monument, is 32º. Find the height of the monument to the nearest foot.
asked by meep on January 19, 2013 
Geometry
The diagram shows to triangles connected at one vertex. The tops of the triangles are both right angles. The angles closest to the vertex are 30 degrees and the other is a variable (c). I'm confused on how to find the value of c, without the value of the
asked by Nia on November 5, 2013 
Algebra
A.Write and solve an equation to find three consecutive integers with a sum of 126. Let n= the first integer. B. In part A, could you solve the problem by letting n= the middle integer,n1= the smallest integer, and n+1= the largest integer?
asked by Brianna on October 13, 2011 
MATH
A protected area was stocked with 1500 deer of a certain species in 1995. The deer population in 2010 was found to be 3350 deer. Let t be the number of years after 1195. Find the deer population at t=3
asked by Susan on June 29, 2013 
Geometry
Two sides of a rhombus form a 120º angle. The length of each side is 6 in. Explain how to find the area of the rhombus, and then calculate the area. Leave your answer in simplest radical form.
asked by Rachel on February 13, 2012 
Math
Trevor went to an amusement park where ride tickets cost $2.50 each. He plans to spend $15.00 on refreshments while at the park. He has a total of $65.00. Write an equation to find the number of ride tickets he can buy.
asked by Brooke on March 25, 2015 
binomial distribution
Assume that a procedure yields a binomial distribution with a trial repeated n=5n=5 times. Use some form of technology to find the probability distribution given the probability p=0.687 of success on a single trial.
asked by jack on May 4, 2017 
PHYSICS
15.0 moles of an ideal gas, at an initial pressure of 3.50 x105 N/m2 and an initial volume of 1.200 m3, undergo a small isothermal expansion to a volume of 1.220 m3. Find the work done by the gas.
asked by Emma on November 14, 2012 
Math
Sam and two friends went to the movies for Sam's birthday. They shared a large box of popcorn costing $6, and they spent a total of $21. The expression below can be used to find c, the cost of each ticket. $21 = 3c + $6 How much did each ticket cost?
asked by Eden S. on December 14, 2013 
Stats
A group of 56 randomly selected students have a mean score of 30.8 and a standard deviation of 4.5 on a placement test. Find a 95% confidence interval for the mean score, ì, of all students taking the test. (Note: ó is unknown.)
asked by Erica on November 1, 2010 
physics
An object of an unknown mass is attached to an ideal spring with force constant 120 N/m and is found to vibrate with a frequency of 6.00 Hz. Find (a) the period, (b) the angular frequency, and (c) the mass of this object.
asked by collegekid on November 16, 2009 
math/physics
Forces with magnitudes of 2000 newtons and 900 newtons act on the machine part at angles of 30 degrees and 45 degrees respectively, with the xaxis. Find the direction and magnitude of the resultant of these forces.
asked by Cydni on April 10, 2012 
Algebra please help!
I had to find the distance between to locations on a graph which I did using the distance formula I got sqrt281 from point a (6,3) point b (10,9). The problem is each unit is approximately 1/8 of a mile. Now what? Round your answer to the nearest tenth of
asked by Taylor95 on October 1, 2013 
Chemistry
A concentration cell consists of the same re dox couples at the anode and the cathode, with different concentrations of the ions in the respective compartments. Find the un known concentration for the following cell. Pb(s)  Pb2+(aq, ?)  Pb2+(aq, 0.1
asked by Steven Gomez on April 21, 2013 
math help
1. Michelle reads 1,200 words in 7 minutes, and Tricia reads 700 words in 3 minutes. Who is the faster reader? 2.Find the unit price for the item: $6.96 for a dozen pears.
asked by lynn on October 27, 2007 
physics
A 2.38 × 103 kg car requires 5.4 kJ of work to move from rest to some final speed. During this time, the car moves 28.1 m. Neglecting friction, find a) the final speed. Answer in units of m/s.
asked by Joe on November 2, 2010 
Statistics
Suppose you want to figure out what to do with your degree in psychology. You ask some fellow students from your psychology program who recently graduated to find out what they are doing with their degree and how much it pays. What type of sampling is
asked by Tise on August 13, 2013 
Discrete Mathematics
It was proven during the previous lecture that 1+2+3+....+n=[n(n+1)]/2. Using that result, find the sum of all 3digit palindromes: a palindrome is a number that can be written as ABA, where 1=
asked by Eric on April 10, 2012 
Math
The radius needed to create a sphere with a given volume V can be approximated by the equation r = 0.6(V)^1/3. Find the radius of a sphere with a volume of 729 cubic meters. Round the answer to the nearest hundredth.
asked by Anonymous on March 27, 2010 
math
Maximize z = 16x + 8y subject to: 2x + y ≤ 30 x + 2y ≤ 24 x ≥ 0 y ≥ 0 Graph the feasibility region. Identify all applicable corner points of the feasibility region. Find the point(s) (x,y) that maximizes the objective function z = 16x + 8y.
asked by ANONIMOUS on July 18, 2011 
chemistry
Find the temperature at which the reaction below is spontaneous given this data: Hf^o of NH3(g) =  46 kJ/mol, S^o of NH3(g) = 192.5 J/mol·K, S^o of N2(g) = 191.5 J/mol·K, S^o of H2(g) = 130.6 J/mol·K. N2(g) + 3H2(g) 2NH3(g)
asked by Amandeep on April 19, 2008 
statistics
Suppose that the certain lifetimes of a certain light bulb are normally distributed with μ=1500 hours and σ=200. Find the probability that a light bulb will burn out in less than 1200 hours.
asked by Yenny on May 14, 2012 
physics
A motorist drives south at 26.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 2.40 min, and finally travels northwest at 30.0 m/s for 1.00 min. For this 6.40 min trip, find the following values.
asked by jon on October 5, 2011 
physics
Use the table of 7.3 to find the point between the Earth and the Sun at which an object can be placed so that the net gravitational force exerted on it by these two objects is zero. TABLE 7.3
asked by becky on January 8, 2007 
math
for n repeated independent trials, with constant probability of success p for all trials, find the probability of exactly x succes n=20,p=1/8, x=2 I know the answer but I do not know how to get to that. Answer is 0.268 should I reduce fraction?
asked by Andrew on November 20, 2012 
physics
A block of mass 200g and density 0.8g/cm3 is submerged in a liquid of density 0.2g/cm3. find minimum force required to keep the block floating.
asked by Narayanan on February 11, 2012 
Chemisrty
Using information from the periodic table, how can you find out which chemical element another (Uuh) resembles? It resembles those elements in the same group. So Uuh should have similar chemical properties to Se, Te, Po,etc
asked by L0bster_quadrille on February 1, 2007 
College Chemistry 3
Find the empirical Formula of a compound that is 30.4% nitrogen by mass, and consists of only nitrogen and oxygen. What is its molecular formula if its molar mass is 92g/mol?
asked by Ernesto on August 15, 2012 
Math
Twenty marbles are in a bag. There are 5 green marbles, 9 blue marbles, and the rest are red. Two marbles are drawn at random without placement. Find the probability that neither is blue
asked by Elizabeth on November 1, 2013 
math URGENT
okay i need to find the domain and range of this z(x) = ãx^2  100 (everything is in the square root) so i think i found the domain i got [10,10] but i don't know about the range i solved for x and got stuck here x=ãy^2 + 100 helppp pleaseee :)
asked by lyne on October 29, 2009 
History
What was the reason Columbus sailed to the Americans? He wanted to find riches He wanted to prove that the world was round He wanted to prove his seamanship •• He wanted to see India
asked by Lily on August 30, 2016 
Physics
A garden roller is pulled with a force of 200N acting at an angle of 50* with the ground level.Find the effective force pulling the roller along the ground.
asked by Allwell on March 27, 2012 
Probability and Statistics
Random Variables X and Y follow a joint distribution: f(x,y)=(6xy)/8 if 0
asked by Katy on November 1, 2013 
Algebra
A project can be completed by n workers in t days. If 56 workers need 7 days to finish the project, find the value of k  I found k. K=392 Final step  Hence, express n in terms of t. WHAT DO I DO HERE?
asked by Alexis on January 15, 2019 
math
The measures of two angles of a triangle are 36 and 71. Find the measure of the third angle, and classify he triangle according to its angles. Would you have to add 36 and 71 and then subtract the answer from 180. Which gives you an answer of 73 acute
asked by lilfoot on February 6, 2015 
nonlinear algebra
Use prime factorization to simplify the following square root leave as exact answer. How do you find the prime factors of this problem? 112 square root
asked by Kylie on March 15, 2013 
Algebra 2
An arch in the shape of the top half of an ellipse is 10 feet wide and 3 feet high at the center. Find the height of the arch 1 foot from the center.
asked by Nadina on April 17, 2018 
Math
A 3digit positive integer is selected at random. Find the probability that A) The last two digits of the number is 22 B) The number is greater than 900 C) The number is less than 100 D) The number contains at least one digit 8
asked by Ledyyyy on February 13, 2016 
sales tax
here is my problem. The tax rate in a certain state is 5% Find the total price payed for shoes that cost 52 dollars Total price = cost + salestax =52 + 52*.05 =52+2.60
asked by masha on August 9, 2005 
physics
A body of mass M1 collides elastically with another body of mass M2 at rest. After collision the velocity of M1becomes ¾ times of the velocity. Find the ratio of their masses
asked by pramod on March 27, 2012 
maths
a man bought a certain number of toys for rs 180 and he broke two of them. Then he sold each of the rest for Rs.10 more than he had given for it and thereby he makes a profit for Rs 60. find the number of toys he initially bought
asked by anoynomous on April 9, 2013 
math
Draw a diagram to show that there are two tangent lines to the parabola y = x2 that pass through the point (0, −25). Find the coordinates of the points where these tangent lines intersect the parabola.
asked by Kyle on January 9, 2016 
L.A
I'm trying to find the theme of the book I'm reading, but I don't really know what exactly is a theme, could anyone give me an idea of what a "theme" of a story is? Is the theme = What is the author trying to teach us? Or is it the central message of the
asked by Shadow on October 20, 2010 
Math
"The probability of getting heads on a biased coin is 1/3. Sammy tosses the coin 3 times. Find the probability of getting two heads and one tail". I thought that all you have to do is: (1/3)(1/3)(2/3) It makes sense to me, but it's not right...
asked by Stuck on May 3, 2010 
Math
What is the difference in minutes between the shortest collection times before and after the well was installed? Box Plot 1 25 to 35 Box Plot 2 45 to 64 What numbers do I need to subtract? 6445 and 3525 and then find the difference between those? I am
asked by Patrick on October 10, 2018 
Chem
The density of an unknown metal is 8.94 g/cm^3 and its atomic radius is 0.126 nm . It has a facecentered cubic lattice. Find the atomic weight of the unknown metal.
asked by HELp on April 28, 2010 
Physics
A system of pulleys is used to lift a load of 1000kg.if the efficiency of pulley system is 80%and velocity ratio is 20,find effort required to lift the load...............??
asked by Anonymous on October 3, 2017 
Leah
During a week in December on anchorage, Alaska the daily high temperatures were 20,18,10,15,15,25, and 11. Write an expression to find the average daily high temperature during that week.
asked by Math on April 3, 2011 
Math
Ben buys some oranges at the rate of 10 per $. He also buys equal number of oranges at the rate of 12 per $. He mixes them together and sells them at 15 per $. Find his loss or profit percent.
asked by A GOODSTUDENT on September 16, 2016 
science
a body is moving with a initial velocity of 2m/s with constant acceleration of2m/s^2.another body starts from rest with constant acceleration of 6m/s^2.find how far from the second particles overtake the first
asked by Anonymous on October 15, 2017 
algebra
Kim spent a total of $100 for a laptop and 4 blank cds. The cost of the laptop was $92. Write and solve an equation to find, c, the cost of each blank CD
asked by Anonymous on October 22, 2012 
Trigonometry
The lengths of the diagonals of a parallelogram are 20 inches and 30 inches. The diagonals intersect at an angle of 35 degrees. Find the lengths of the parallelograms sides to the nearest hundredth.
asked by Hailey Lepire on May 15, 2017 
geometry
The Volumes of two similar figures are given. The surface area of the smaller figure is given. Find the surface area of the larger figure. V= 27m^3 V= 64m^3 S.A.= 63m^2
asked by Mr. Moo on April 6, 2011 
MATH
HOW DO YOU FIND OUT THIS PROBLEM FRAN FOUND THE AREA OF A RECTANGLE BY MULTIPLYING 5 UNITS X 4 UNITS. DRAW FRAN RECTANGLE. LABEL THE SIDE LENGTHS.
asked by LATTANE on March 21, 2013 
mathematics
a man bought a certain number of toys for rs 180 and he broke two of them. Then he sold each of the rest for Rs.10 more than he had given for it and thereby he makes a profit for Rs 60. find the number of toys he initially bought
asked by anoynomous on April 9, 2013 
calculus
The edge of a cube office is decreasing at a constant rate of two cm per seconds .find the rate of change of its volume at that instant when the volume is 64m cube
asked by angela on November 2, 2015 
maths
Hi Please can you help Find the particular solution of the differential equation from f(x)=(x^26x+23)^(3/2)for which y=2 when x = 1, and then give this particular solution in explicit form? Am I correct that the following is the explicit form (not
asked by Claire on March 30, 2011 
Geometry
The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side than from the larger side of the rectangle. The perimeter of the rectangle is equal to 56 cm. Find the lengths of the sides of the rectangle.
asked by Anonymous on April 10, 2017 
math (college)
write a quadratic function needed to find the dimension of the rectangle with perimeter 100 having the maximum area. what are the dimensions of the rectangle with the maximum area?
asked by Anonymous on August 27, 2010 
Maths IX
The mass of a solid sphere of metal 5cm in diameter is 6.25 kg. Find the mass of a spherical shell of same metal, the external diameter being 10cm and thickness 1 cm.
asked by maqbool on April 10, 2017 
Math
The math question is "in a piggy bank there is a total of $15.75. If the ratio of dimes to quarters is 5:7, find the total amount in quarters. My question is, what formula would I use to solve this?
asked by michelle on February 19, 2015 
Math
Suppose f(x)=5/(x2). f'(5)=5/9. Use this to find the equation of the tangent line to the curve y=5/x2 at the point (5,(5/3)). write your answer in the form y=mx+b where m is the slope and b is the yintercept. The equation of the tangent line is.....
asked by Niki on February 29, 2016 
Geometry
Set up a system to solve. Two angles are supplementary. Three times one angle is equal to the other angle minus 16. Find the angles. The answer is x= 41 and y= 139. How did they get the answer?
asked by ashley on October 8, 2015 
precalc
A Norman window has the shape of a square with a semicircle mounted on it. Find the width of the window if the total area of the square and the semicircle is to be 240 ft squared
asked by lauren on September 13, 2016 
algebra
length of rectantular rug is 7/6 its width. rug is placed on floor with 1 foot margin all around. area of floor is 4 times that of margin. find the dimensions of the room.
asked by Sejul on October 10, 2011 
science
A sound source of frequency 170Hz is placed near a wall. A man walking from the source towards the wall. Find that there is a periodic rise and fall of sound intensity?
asked by aynul on March 21, 2018 
English
I was assigned philosophers and we were research their views on human nature. I got voltaire, and I am struggling to find his views on human nature. If there is any websites or knowledge known about him please provide it.
asked by Hails on October 21, 2018 
Statistics
The probability of a randomly selected car crashing during a year in a certain country is .0479. If a family has three cars, find the probability that at least one of them has a car crash during a year.
asked by Jana on June 13, 2013 
Precalculus
Okay I posted this before but I am still not sure. How would you solve for M? The resultant of two forces acting on a body has a magnitude of 80 pounds. The angles between the resultant and the forces are 20° and 52°. Find the magnitude of the larger
asked by Hanson on August 9, 2011 
algebra word problem
I NEED HELP PLEASE!!!!!!!!! A rectangular table is five times as long as it is wide. If the area is 50 ft.^2, find the length and the width of the table. The width of the table is______ ft. The lenght of the table is ______ ft.
asked by pj on December 9, 2008 
Statistics
On a production line making cameras, the probability of a randomly chosen camera being substandard is 0.072. Find the probability that there are fewer than 18 cameras which are substandard.
asked by Alex on April 8, 2019 
Statistics
Suppose that a sample of size 60 is drawn from a population with mean 73 and standard deviation 79. Find the value of , the standard deviation of the distribution of sample means. How do I work this on my calculator?
asked by Anonymous on June 18, 2013 
math
A cyclist travels for 60km at x km/h and 180km at y km/h and takes 10 hours altogether for the journey. If the speed are interchange, the journey takes 8.6 (8 whole number 2 over 3) hours. Find x and y.
asked by jane on November 16, 2015 
science
A body of mass 20kg moving with a velocity of 8m/s collides with a stationary body of mass 10kg and the two stick together.They then move with a common velocity V.Find the value of V.
asked by emmanuel on August 26, 2015
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