Saturday

August 30, 2014

August 30, 2014

Number of results: 44,827

**statistics**

For a normal distribution with a mean of 140 and a standard deviation of 55 find each value requested. a. What is the minimum score needed to be in the bottom 10% of the distribution? b. What scores form the boundaries for the middle 75% of the distribution.
*April 29, 2012 by tammy*

**physics**

A stunt driver wants to make his car jump over eight cars parked side by side below a horizontal ramp. (a) With what minimum speed must he drive off the horizontal ramp? The vertical height of the ramp is 1.5m above the cars, and the horizontal distance he must clear is 20m. (...
*September 14, 2009 by perry*

**calculus **

Find the point on the function y= 1/ x, x>0 that is closest to the point (2,2) and then state the minimum distance.
*March 31, 2010 by Anonymous*

**Geometry**

What is the minimum distance between any point on the circle x^2 + y^2 = 25 and the line y = -\frac{3}{4}x + \frac{75}{4} ?
*March 7, 2013 by John*

**Geometry**

What is the minimum distance between any point on the circle x^2 + y^2 = 25 and the line y = -\frac{3}{4}x + \frac{75}{4} ?
*March 10, 2013 by John*

**Physics**

An engineer needs to determine the distance across a rive whose banks are approx. parallel. Standing on one side of the bank, the engineer can see the other side. The engineer only has a 30 foot measuring tape ( which is shorter than the distance from one bank to the other) ...
*September 29, 2011 by Janie*

**Math: Pre-calculus**

A rancher wants to build a rectangular pen with an area of 180 . Let W be the width of the pen and L be the length of the pen. a) Find an equation for the perimeter P in terms of W and L . b) Use the given area to write an equation that relates W and L . c) Find the pen ...
*October 6, 2013 by Sarah*

**chem**

Commerical hydrochloric acid is 37% by mass HCl and has a solution density of 1.18g/mL. What minimum volume of hydrocloric acid is needed to dissolve 16g Al. The balanced equation is 2Al + 6Hcl --> 2AlCl3 + 3H2
*November 21, 2007 by Anonymous*

**Physics**

An airplane can reach a takeoff speed of 45 m/s (from rest) in 7.0 seconds. What is the minimum runway length required for a safe takeoff?
*September 13, 2010 by Kyle*

**forces**

what is the measure of the amount of force needed to move an object a certain distance?
*February 24, 2008 by cn*

**Algebra 2**

Can somebody help with these. Simplify (be sure to rationalize all denominators) 11. 3/[SQRT(5) - 2] and this.. Note: I only need help on the b part of the question.. 15. Assume that a surveyor stands at the top of a mountain that is “h” feet tall. If the distance (in feet) ...
*March 12, 2009 by Mike*

**physics**

A stunt driver wants to make his car jump over eight cars parked side by side below a horizontal ramp a)With what minimum speed must he drive off the horizontal ramp? The vertical height of the ramp is 1.5m above the cars, and the horizontal distance he must clear is 20m . ...
*November 24, 2012 by juanita*

**Elasticity (Physics)**

A tunnel of length L=150m, height H=7.2m, and width w=5.8m (with a flat roof) is to be constructed at a distance d=60m beneath the ground. The tunnel roof is be entirely supported by square steel columns, each with a cross sectional area of 960 cm^2. The mass of 1.0 cm^3 of ...
*September 9, 2009 by David*

**physics**

please check these for me: What is the wavelength of microwaves of 3.0*10^9 Hz frequency? a. 0.050m b. 0.060m c. 0.10 m d. 0.20 m C If a light ray strikes a flat mirror at an angle of 30deg from the normal, the ray will be reflected at an angle of a. 30deg from the mirror's ...
*March 12, 2009 by physics*

**Calculus**

if the work required to stretch a spring 1 ft beyond its natural length is 12 ft-b, how much work is needed to stretch 9 inches beyond its natural length?
*April 30, 2014 by Rachel*

**Health**

Body fat is defined as the proportion of fat that is in your body compared to your bone and muscle. True or False My answer is true because to me its the component that refers to the ratio of fat to lean body mass.
*August 18, 2014 by Faye*

**Physics**

What is the minimum work needed to push a 1050 kg car 460 m up along a 17.5° incline? (a) Ignore friction (b) Assume the effective coefficient of friction retarding the car is 0.30
*October 15, 2009 by Jen *

**physics help!!!**

What is the minimum work needed to push a 900 kg car 460 m up along a 17.5° incline? (a) Ignore friction. (b) Assume the effective coefficient of friction retarding the car is 0.30?
*November 17, 2009 by greg*

**physics**

If a hollow metal cylinder of radius r is rolling towards a circular bump of height h. calculate the minimum speed needed to progress over a circular bump.
*March 3, 2013 by darrin *

**Physics**

What is the minimum work needed to push a 1075 kg car 230 m up along a 17.5° incline? (a) Ignore friction. (b) Assume the effective coefficient of friction retarding the car is 0.30?
*March 21, 2014 by Hope*

**Physics**

A body of mass 10kg moving with velocity 30m/s collide with another body of mass 15kg.If the velocity of both the body are same after collision.Then find their common velocity.
*August 9, 2012 by Aarushi*

**health care 220**

can someone just tell me how to do this I can not get a hold of my teacher. I do not want the answer I just do not understand how to do it. A. Use the matrix below to describe each approach to organizing information about the body. Discuss how each approach can be used. ...
*December 7, 2008 by angela*

**algebra**

would someone write out the whole process of the following question, including solving for y so that i can see what i am doing wrong. Thank you Solve by the substitution method. write as an ordered pair. 8x-3y=-94 2x+22=y
*July 23, 2011 by babs*

**Math- Algebra**

A motorist was to travel from town A to town B, a distance of 80 miles. He traveled the first 24 minutes at a certain rate; traffic then increased and for the next 6 minutes he averaged 10 miles per hour less than his original speed; then traffic eased up and he traveled the ...
*October 20, 2013 by Jennifer*

**Chemistry**

The recommended dosage of iodine-131 is 4.20 \mu{\rm Ci/kg} of body weight. How many microcuries of iodine-131 are needed for a 84.0 {\rm kg} patient with hyperthyroidism?
*April 27, 2011 by Help!!*

**physical Edu**

The fight-or-flight response prepares the body for physical action regardless of whether action is needed. is it True
*June 18, 2012 by Andy*

**Math **

Justin rides his bike in a rectangular route. He knows the total distance is 6,188 yards and the length of the shorter side of the route is 741 yards. What is the length of the longer side ?
*April 5, 2013 by Josh *

**Physics**

A stunt driver wants to make his car jump over 8 cars parked side by side below a horizontal ramp. A)With what minimum speed must he drive off the horizontal ramp? The vertical height of the ramp is 1.5 m above the cars and the horizontal distance he must clear is 22..(I got ...
*December 6, 2013 by Somoan*

**health**

The nine essentialamino acids are A)NOT FOUND IN FOODS B)NOT MADE BY THE BODY C)ALL PRESENT IN INCOMPLETE PROTEIN D)MADE BY THE BODY not made by the body, so they must come from foods.
*January 5, 2007 by gabrielle*

**Chels**

What can you say about the motion of a body if its veloctiy-time graph is a straight line inclined with the time axis? a. the body moves with uniform velocity b.the body moves with uniform acceleration c. the body moves with non uniform acceleration d. the body moves with ...
*April 29, 2008 by Physics*

**science**

The recommended dosage of iodine-131 is 4.20 \mu {\rm Ci}/{\rm kg} of body mass. How many microcuries of iodine-131 are needed for a 58.0kg patient with hyperthyroidism?
*November 5, 2012 by Cassie*

**Physics**

If a rod is moving at a velocity equal to 1/2 the speed of light parallel to its length, what will a stationary observer observe about its length? The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the ...
*October 23, 2012 by Laurie*

**Health**

1. A fungi is a single celled organism that can cause a disease -True? 4. Your skin keeps pathogens from getting out of your body. -False? 16. Hormones are chemical substances made and released in one part of the body that causes a change in another part of the body. -False? ...
*November 26, 2011 by mysterychicken*

**PRE-CALC**

A drug is eliminated from the body through urine. Suppose that for an initial dose of 10 milligrams, the amount A (t) in the body t hours later is given by A(t) = 10(0.8) t a) Estimate the amount of the drug in the body 8 hours after the initial dose. b) What percent of the ...
*December 2, 2010 by Ann*

**gen chem**

The recommended dosage of iodine-131 is uCi/kg of body weight. How many microcuries of iodine-131 are needed for a patient with the hyperthyroidism?
*June 10, 2012 by Danny*

**math**

A railing for a deck requires pieces of redwood 4 ft 9 in., 13 ft 9 in., and 4 ft 3 in. long. What is the total length of material that is needed? A)
*August 19, 2007 by sandy*

**math**

a railing for a deck requires pieces of cedar 4 ft 8 in., 11 ft 7 in., and 9 ft 3 in long. what is the total length of material that is needed?
*December 5, 2007 by Stumped*

**physics**

A spring has k = 88 N/m. Use a graph to determine the work needed to stretch it from x = 3.6 cm to x = 5.6 cm, where x is the displacement from its unstretched length.
*November 17, 2009 by frank*

**math**

A railing for a deck requires pieces of redwood 4 ft 9 in, 13 ft 9 in, and 4 ft 3 in long. What is the total length of material that is needed?
*December 11, 2010 by cookie*

**Statistics**

How large a sample of U.S. adults is needed in order to estimate U with a 95% confidence interval of length 1.2 hours?
*June 25, 2012 by Pat*

**physics**

For a simple 15 upward ramp, what length would be needed for a runaway truck traveling 140 ?
*February 14, 2013 by caa*

**physics**

A trucker sees the image of a car passing her truck in her diverging rear-view mirror, whose focal length is 60.0 cm. If the car is 1.85 high and 6.75 away, what is the location and height of the image. 1/p + 1/q = 1/f 1/675cm + 1/q = 1/(-60cm) q=-55.1 cm M=h'/h M=-q/p M=-(-55...
*March 28, 2008 by Anonymous*

**Math**

Thomas puts fence posts from one end of a field to the other, equal distance apart. There are 287 posts. Width of each post is 10 cm. Distance between two posts is 30 meters. Find Length of fence.
*February 11, 2014 by Anonymous*

**trig**

Given BC = 53 cm, BD = 62 cm, CD = 80 cm, ABC = 53°, and ACB = 66°, find the following. (Round your answers to the nearest whole number.) (a) the length of the chainstay, AC AC = cm (b) BCD BCD = °
*November 16, 2012 by janice*

**Math**

If a rectangle has a perimeter of 12 meters and each side is a whole number of meters, what are the possible dimentions for the length and width? List them and explain your answer.
*March 4, 2014 by Hero*

**Physics(Please help)**

What is the smallest number of whole logs (ñ = 725 kg/m3, radius = 0.0800 m, length = 3.60 m) that can be used to build a raft that will carry four people, each of whom has a mass of 60.0 kg? I do not know how to start this.
*June 21, 2012 by Hannah*

**PHYSICS**

A 7 m ladder weighing 250 N is being pushed by force F AT bottom What is the minimum force needed to get the ladder to move? The static coefficient of friction for all contact surfaces is 0.4.
*August 10, 2010 by sushanth*

**physics**

What is the minimum work needed to push a 900 kg car 890 m up along a 7.5 degree incline? (a) ignore friction (b) Assume the effective coefficient of friction retarding the car is 0.20.
*November 8, 2010 by amy*

**PHYSICS please**

what is the minimum gauge pressure needed in the water pipe leading to a building if the water is to come out of a faucet on the 12th floor, 41m. above the pipe.
*April 15, 2011 by DMITRIC*

**Science**

A 2400-pound car exerts its maximum force of 750 pounds. What will be its minimum time needed to slow it down from 50 m/s to 10 m/s? Determine how far will the car travel in that time.
*February 2, 2012 by Princess*

**calculus**

Find a vector that has the same direction as the given vector but has length 6. ‹-2, -2, 4› I know how to find a unit vector of this, but to find a vector in the same direction but length >1 I'm not sure how to determine the scalar multiple that will be needed. I know it ...
*August 23, 2011 by vector length*

**math 214**

A group of students on a hiking trip wants to find the distance AB across a pond (see the following figure). One student suggests choosing any point C, connecting it with B, and then finding point D such that <DCB ≅ <ACB and DC≅AC. How and why does this help ...
*February 26, 2010 by alicia*

**Physics**

(1) body is taken to depth of 32km below the surface of the earth. Calculate the percentage decrease in the weight of the body at this depth (The radius of the earth is 6400km) (2)A wire of mass per unit length 5.0gm-1 is stretched between 2 points 30cm apart. The tension in ...
*July 26, 2008 by matrixxavier*

**math and geography**

does any body know what websites let you see the 5th grade building spelling skills and daily geography (by evan moor) with answer ? this is using java?
*October 20, 2009 by ms. rizzo*

**physics**

A charge of -2q is placed a distance r from the origin and a charge of +2q is placed a distance 2r from the origin. What is the amount of work needed to move a charge of q to the origin from infinity? I don't get the question. And please explain to me how can I do it.
*March 23, 2008 by Shelly*

**programming**

Application: Pendulum Clocks Pendulums used in clocks, such as grandfather clocks, keep fairly accurate time for the following reason: When the length of a pendulum is large compared with the maximum arc of its swing, the time to complete one swing is independent of both the ...
*October 4, 2012 by fatih*

**math**

The pyramid of Giza in Egypt is built of stone and was completed in 2560 BC. The length of each side of the square base is 230 meters and the vertical height is 146 meters. 1. What volume of stone is needed to form a solid pyramid with these dimensions? The surface of the ...
*June 26, 2011 by colton*

**college physic**

A stunt driver wants to make his car jump over 8 cars parked side by side below a horizontal ramp.(a)With what minimum speed must he drive off the horiontal ramp?The vertical height of the ramp is 1.5m above the cars and the horizontal distance must be clear is 20m.(b)If the ...
*June 23, 2011 by noah*

**college physic**

A stunt driver wants to make his car jump over 8 cars parked side by side below a horizontal ramp.(a)With what minimum speed must he drive off the horiontal ramp?The vertical height of the ramp is 1.5m above the cars and the horizontal distance must be clear is 20m.(b)If the ...
*June 23, 2011 by noah*

**MATH ANALYSIS & TRIG**

At noon, Al is 6km north of point O traveling south at 10km/h. Also at noon, Barb is 2km east of point ) traveling east at 5km/h. A) express the distance "d" between Al and Barb as a function of time "t" hours after noon. B) Find the time at which the distance is a minimum
*October 29, 2013 by francis*

**Economics**

What is the common element in each column? Column A: The number of minimum wage jobs has increased. By 2025 blue collar work could be totally obsolete. The number of ATM’s is increasing faster than the rate of bank tellers. “We’re sorry all our operators are busy. Your call is...
*February 22, 2011 by Ann*

**Economics**

What is the common element in each column? Column A: The number of minimum wage jobs has increased. By 2025 blue collar work could be totally obsolete. The number of ATM’s is increasing faster than the rate of bank tellers. “We’re sorry all our operators are busy. Your call is...
*February 22, 2011 by Ann*

**Economics**

What is the common element in each column? Column A: The number of minimum wage jobs has increased. By 2025 blue collar work could be totally obsolete. The number of ATM’s is increasing faster than the rate of bank tellers. “We’re sorry all our operators are busy. Your call is...
*February 22, 2011 by Ann*

**statistics**

We guess, based on historical data, that 30% of graduating high-school seniors in a large city will have completed a first-year calculus course. What's the minimum sample size needed to construct a 95% confidence interval for a proportion with a margin of error of 2.5%?
*April 22, 2014 by nicole*

**factoring**

can this equation be factored further? y= x^4+2x^3+4x^2+8x+16 Not in the real number system. If you plot the function, you will see the minimum is at x=-1.1 (approx) and y is positive. At no x does the function equal zero, so there are no real roots, which means, no factors. ...
*July 26, 2006 by kristie*

**Physics**

The Achilles tendon, which connects the calf muscles to the heel, is the thickest and strongest tendon in the body. In extreme activities, such as sprinting, it can be subjected to forces as high as 13 times a person’s weight. According to one set of experiments, the average ...
*November 11, 2013 by Kenzie*

**Physics**

A massless spring with spring constant 17.1 N/m hangs vertically. A body of mass 0.210 kg is attached to its free end and then released. Assume that the spring was unstretched before the body was released. How far below the initial position does the body descend?
*April 25, 2013 by Anonymous*

**macroeconomics**

Suppose in 2009 the united states congress passes a minimum wage law that increases the minimum wage (the lowest legal wage) to 7.25 per hour and has a provision that increases the minimum wage at the beginning of each year based on the CPI for the previous year. a.) If the ...
*February 27, 2010 by sally*

**Psychology**

I know I am not going to do such a thing, but the thought keeps moving through my mindDid I remember to get dressed?" Karen recognizes her thought as unrealistic, but she stops at each restroom to check in the mirror. She checks again when she passes a window in which she can ...
*July 26, 2013 by Matin*

**A&P 1**

research the effects of a stimulus or major physical change on body system structure and function, write a researched analysis of the physiological and structural effects of Regular physical fitness and exercise on body system integrity. Include a clear analysis of how the ...
*January 29, 2009 by PJ*

**Calculus**

Shadow Length A man 6 feet tall walks at a rate of 3 ft per second away from a light that is 16 ft above the ground (see figure). When he is 11 ft from the base of the light find the following. (a) The rate the tip of the shadow is moving. (b) The rate the length of his shadow...
*August 31, 2011 by Andrea*

**general physics**

Determine the minimum gauge pressure needed in the water pipe leading into a building if water is to come out of a faucet on the twelfth floor, 38 m above that pipe.
*April 18, 2010 by Anonymous*

**Physics**

Determine the minimum gauge pressure needed in the water pipe leading into a building if water is to come out of a faucet on the twelfth floor, 40m above that pipe. Pa?
*December 11, 2012 by Melissa*

**Physics**

a body (A) is moving with a speed of 250m/s in the positive x-direction, collides with body (B) initially at rest and having the same mass as (A). after collision the speed of body (A) is 100m/s making 30 degree with the horizontal. the speed and direction of body (B) after ...
*August 25, 2012 by Help, Thankyou*

**Physics**

The minimum distance between particles in a wave that have the same displacement and are moving in the same direction is called?
*April 12, 2012 by Sharon*

**physics**

If the coefficient of friction between the tires of a car and the road is 0.101, what is the minimum stopping distance of a car traveling at 78.4 km/hr?
*September 29, 2012 by Demis*

**Math**

Checking my son's homework and want to see if he figured this out correctly .. i am too old to be revisiting this math ... Here is the question ... The perimeter of a rectangle patio is six times the length of the shorter side. If the shorter side is 8 feet, what is the length...
*September 18, 2007 by Mom*

**Calculus**

Find the absolute maximum and absolute minimum values of the function f(x)=x^3+6x^2-63x+4 on each of the indicated variables. Enter DNE for does not exist. (A) Interval = [-8,0] Absolute maximum = Absolute minimum = (B) Interval = [-5,4] Absolute maximum = Absolute minimum = (...
*October 29, 2013 by Nate*

**physics**

a car traveled at uniform velocity of 20m/sec for 5 sec the brakes are applied and car retards uniformly and come to rest in further 8 sec.find a)distance traveled in first five sec b)distance traveled after breaks are applied c)total displacement during this period and its ...
*May 28, 2012 by parul*

**math**

Every member of a high school class of 150 students was polled to see whom they would vote for in the election for student body president. The poll results are shown below.
*July 13, 2014 by Roberta*

**Calculus**

A fence 5 feet tall runs parallel to a tall building at a distance of 2 feet from the building. We want to find the the length of the shortest ladder that will reach from the ground over the fence to the wall of the building. Here are some hints for finding a solution: Use the...
*July 17, 2013 by J*

**Calculus**

If the work required to stretch a spring 1 ft beyond its natural length is 6 ft-lb, how much work is needed to stretch it 6 in. beyond its natural length?
*December 4, 2011 by Ryan *

**trig is killing me...**

the angles of elevation of a tower at two places due west of it are 63 degrees and 56 degrees. given that the foot of the tower and the two points are on ground level and the distance between the two points is 20 meters, find the height of the tower. You have to draw a picture...
*December 7, 2006 by holly*

**Physics**

I have tried to solve this problem in multiple ways, but i keep getting it wrong please help A 48.0 {\rm kg} ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 1.50 turns each second. The distance from one hand to the other ...
*March 3, 2008 by Mark*

**math**

Identify the property of whole numbers illustrated in each of the following. 4 • 5 is a whole number
*November 9, 2009 by Mary*

**Finance**

are investors really made whole with a make-whole call provision
*June 9, 2010 by Anonymous*

**Math**

show that in general, each of the following is false if A, B, and C are whole numbers? 1. A/B = B/A 2. (A/B) / C = A / (B/C) 3. A / (B+C) = (A/B) + (A/C) 4. A / B is a whole numbe
*July 8, 2012 by Jagals*

**math**

A ladder is resting against a wall. The top of the ladder touches the wall at a height of 20ft. Find the length of the ladder if its length is 4 ft more than its distance from the wall.
*September 28, 2011 by stephanie*

**math**

This is a riddle, and I'm supposed to find a 5-digit number from it..... My thousand's digit is the first that is perfect, but if you're not happy with that, it's also the product of the first two primes. My units digit is the odd of those two primes, and if you look at it and...
*September 30, 2011 by Peter*

**Maths**

Mariolys is creating a numbered list of distinct integers. Luigis sees that there are N numbers in the list, and states that he can find either a subsequence of length 13 with increasing terms or a subsequence of length 17 with decreasing terms. What is the minimum value of N ...
*May 29, 2013 by ABCD*

**physics**

A block of mass 0.78kg starts from rest at point A and slides down a frictionless hill of height h. At the bottom of the hill it slides across a horizontal piece of track where the coefficient of kinetic friction is 0.29. This section (from points B to C) is 4.08m in length. ...
*November 18, 2012 by shyne1*

**science**

what is the velocity of a body moves from rest moves the distance of 10 m. and acceleration 2 m/s/s?
*July 6, 2011 by paul*

**physics**

A large uniform "butcher block" rests on two supports(one support at the left end of the block) and has a weight hanging from its end. The block has a mass of 100 kg and a length of 2 meters. If the hanging weight is 59 newtons, what is the minimum value for L for the ...
*October 14, 2010 by sandhya*

**physics**

A large uniform "butcher block" rests on two supports(one support at the left end of the block) and has a weight hanging from its end. The block has a mass of 100 kg and a length of 2 meters. If the hanging weight is 59 newtons, what is the minimum value for L for the ...
*October 14, 2010 by sandhya*

**calculus**

If f is the focal length of a convex lens and an object is placed at a distance p from the lens, then its image will be at a distance q from the lens, where f, p, and q are related by the lens equation 1/f = 1/p + 1/q What is the rate of change of p with respect to q if q = 2 ...
*May 6, 2011 by Sam*

**Physics **

A box of mass m = 0.20 kg slides across frictionless tabletop from rest, with 2.5 m/s2 acceleration. The length of the tabletop is L = 2.00 m and its height is H = 1.50 m. The box then slides off the edge and hits the floor at some distance away, Find the distance x.
*June 9, 2012 by master*

**Math**

The velocity of a body A is given by v(t) = 2t^i + t 3^j. The body starts from rest at time t = 0 and position s(0) = 2^i 10^j. At what time, t, does the body cross the X axis? What is the average velocity of the body for the time interval, t = 0 and the time that it crosses ...
*January 22, 2013 by Devin*

**statistics**

how large a sample size is needed for 2 sided 95% confidence interval to have a length of 2 weeks when mean is 3.6
*June 28, 2012 by jo*

**maths-urgently needed**

ABCD is a trapezium, P and Q are mid points of the diagonals AC and BD. If AB=17cm and CD=9cm then the length of PQ is equal to
*February 7, 2013 by Anonymous*

**physics**

A body of mass 1 kg and velovity 10 m/s collides with another body if mass 3 kg and velocity 2 m/s comming from the exactly opposite direction. if on collision the body's much into one find the magnitude and direction of common velocity
*January 7, 2014 by Shraddha*

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