09/19/18

Ann and Nancy use a metal alloy that is 21% copper to make jewelry how many ounces of an alloy that is 18% copper must be mixed with an alloy that is 23% copper
What's the answer?
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09/05/18

A person drops a penny from the top of a tall building and it takes 15 seconds to hit the ground. Using the acceleration -9.8 m/s^2, how tall is the building?
HELP!!!!!!!
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08/29/18

Differentiate w.r.t. x sin^(-1)⁡〖(3x-4x)〗
i need help on how to Differentiate sin^(-1)⁡〖(3x-4x)〗 
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06/25/18

Use Lagrange multipliers to find the maximum and minimum values of f(x,y)=5x+y on the ellipse x^2+36y^2=1.
 Use Lagrange multipliers to find the maximum and minimum values
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04/10/18

Thermodynamics Question
A 95-slug automobile changes speed from 55 mi/h to 30 mi/h while climbing a 3° hill. If the change in speed occurs over a 1335-ft straight section of road, find the total work. Answer: -270 ft... more
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03/26/18

integration of sinx +cosx/16 + 9sin2x w.r.t. x
integration of sinx +cosx/16 + 9sin2x w.r.t. x
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03/15/18

mary drove 150 miles in three hours. What washer average rate of speed
Using the formula D=r? t where D equals distance traveled, r equals the average rate of speed, and t equals the time traveled, choose the expression or equation that correctly represents this... more
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03/12/18

Rational Expression Quations
If the voltage V in an electric circuit is held constant, the current I is inversely proportional to the resistance R . If the current is 60 amperes when the resistance is 204 ohms, find the... more
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03/11/18

Differentials to find approximate amount of paint
A coat of paint of thickness 0.06 cm is to be applied uniformly to the faces of a cube of edge 32 cm. Use differentials to find the approximate amount of paint required for the job, correct to the... more
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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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02/25/18

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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