03/06/18

How to find the general solution of xy'-4y=e^x using the associated homogeneous equation ?
so far I've done: xy'-4y=ex xyH-4yH=0 ln|yH|=4lnx+c    x4 |yH|=Ae(x^4)  y(x)=A(x)e(x^4)   y'=A'e(x^4)+4x3A(x)e(x^4)=A'e(x^4)+4x3y x(A'e(x^4)+4x3y)-4A(x)e(x^4)=e^x
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02/26/18

Samuel is holding a piano with a mass of 200.0 kg from the top of a balcony. Samuel has a mass of 85.0 kg. What is the force exerted on his feet?
Is it just mass of piano x gravity
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02/25/18

related rates
A 6-foot-tall woman walks at 6 ft/s toward a street light that is 18 ft above the ground. What is the rate of change of the length of her shadow when she is 16 ft from the street light? At what... more
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02/17/18

please help solve, confused
Assume that a procedure yields a binomial distribution with 2 trials and a probability of success of 0.50. Use a binomial probability table to find the probability that the number of successes is... more
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02/15/18

This questions involves youngs modulus
A mole of gold atoms are arranged in a cube. A 1 kg mass is placed on top of the cube. The interatomic spacing for gold is 10^−10 m andYoung’s modulus of gold is 1011 N/m2. Given there are roughly... more
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02/08/18

integrate I(t)=2t^1/3
 t is time and initial capital stock Kis 25.find the capital acummulation during the time intervals [0,1] and [1,3]
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02/01/18

synthetic division to divide
2x^3+11x^2+2x-15/x-5
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01/31/18

find the exact value of the expression with drawing:
3 sin 2pi/3 - 4 cos 5pi/2
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01/29/18

Find the length of an arc that subtends a central angle of 351° in a circle of radius 6 m. arc-length =
Help please Im stuck on this.
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01/29/18

The function is used to convert temperature from Celsius (C) to Fahrenheit (F). The function C(K) = K − 273.15 is used to convert temperature from Kelvin (K) to
"The function" is F(C)= 9/5C +32
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01/25/18

The power needed to move a desk 5 meters is 1200 Watts. The work calculated was 40 joules. What is the mass of the desk?
The power needed to move a desk 5 meters is 1200 Watts. The work calculated was 40 joules. What is the mass of the desk?
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12/04/17

In a hospital 60% of the patients are married. What’s the probability that a sample of one word with 8 patient, had 3 were married
How do you do the question step by step
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11/20/17

Exam question
The probability of the student solving Q1 is 60% . If he solves it the probability of him passing the exam is 80% , if he doesn’t then the probability of failing is 55%.After the exam the student... more
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11/15/17

Bayes Theorem Help
Tommy is a football player who suffers an injury during the game. The team doctor looks at the injury and tells Tommy that he needs to run some tests and there is only a 20% chance he will... more
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11/14/17

(a) What is the distance between the plane and the base of the arch?
A plane is flying within sight of the Gateway Arch in St. Louis, Missouri, at an elevation of 25,000 ft. The pilot would like to estimate her distance from the Gateway Arch. She finds that the... more
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10/31/17

this is a statistics problem
P(x < 170) mean= 174 and the standard deviation = 20. I have to fine the indicated probability.  
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10/23/17

A cubic box is completely filled with 3,375.0 kg of water. What is the length of one side of the box, in meters?
What would be the length of one side of the box, in meters?
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10/23/17

find the probability of getting exactly 4 heads on 8 flips of a coin
I do not know how to figure this out
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10/22/17

with a sample space of: 5, 6, 12,13,15,18,22,50 what is the z score of 13?
Finding z-scores 
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10/18/17

A car drives off the edge of a cliff that is 106m high. The impact is 56.0m from the base of the cliff. How fast was the car going when it went over the cliff?
we were given these equations. t=√(2dx/g) and t=dx/vx
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10/13/17

How to determine if there is a limit or not in a function?
For example, when a limit approaches 0: x^2-5x+7/ x^3
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10/10/17

The results of a test are normally distributed with a mean of 67.5 and a standard deviation of 15 ..
The results of a test are normally distributed with a mean of 67.5 and a standard deviation of 15. If a score is selected at random, then the probability that the score is between 75 and 90 is?
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10/06/17

Find the equation of the line.
Let f(x)=x^2 and g(x)=(x-74)^2+27. There is one line with positive slope that is tangent to both of the parabolas y=f(x) and y=g(x) simultaneously. 
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10/05/17

Volume, height and radius
sand is leaking from.the back of a dump.truck.and forming a.conical.pile on the ground. the sand is leaking at the rate of 0.7m3 per hour. if the base radius of the pile is always 0.2 times the... more
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09/17/17

A basketball player is 6 ft 17 8 in tall. What is his height in centimeters? Answer in units of cm.
 A basketball player is 6 ft 178in tall.What is his height in centimeters?Answer in units of cm.
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