11/07/18

You wish to test the following claim ( H a ) at a significance level of α = 0.001 .
You wish to test the following claim (Ha) at a significance level of α=0.001.      Ho:μ=72.6       Ha:μ≠72.6You believe the population is normally distributed and you know the standard deviation... more
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11/07/18

Linear programming

A health food store is creating smoothies with soy protein and vitamin supplements. A soy joy smoothie cost $2.75 and uses 2 ounces of soy and 1 ounce of vitamin supplements. A vitamin boost... more
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11/02/18

The primary of a transformer connected to 70 V has 10 turns. The secondary has 150 turns. Find the output voltage. This is a step-up transformer.
Transformer relationship: Primary voltage/Number of primary turns=secondary voltage/number of secondaryturns
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10/29/18

Internal resistance

When a 12 V batter with 1Ω internal resistance is connected to a motor, it delivers a current of 2.4 A. The battery is now replaced with a new battery with the same emf but a different internal... more
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10/28/18

How many customers did it take to make 22,500 sales.
4 types of customers bought 22,500 times in 1 year : 10% bought 1 time 12% bought 3 times 15% bought 6 times 63% bought 12 times How many customers total bought in 1 year?
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10/25/18

How do you graph y = 2|x-3|using two linear equations?

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10/20/18

A transformer has a primary voltage of 549 V and a primary current of 121.66 A. The ratio of primary to secondary loops is 440. What is the current in the secondary?
(show units: type V for Volts, A for amps, ohms for Ω , W for Watts, eV for electron volts, Hz for Hertz, N for newtons,  m for meters, s for seconds, J for Joules, cal for calories, m/s for meters... more
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10/18/18

If a seed is planted, it has a 95% chance of growing into a healthy plant. If 9 seeds are planted, what is the probability that exactly 1 doesn't grow?
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10/14/18

the normal approximation to the binomial distribution
a magazine reported that 6% of american drivers admit to reading a newspaper while driving. if 500 drivers are selected at random, find the probability that exactly 40 will admit to reading the... more
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10/08/18

Don't understand Kolmogorov-Smirnov test
I am stumped doing a journal club for class. I am looking at a scientific article in which they used the "Kolmogorov-Smirnov test" and I have no idea what that is. I'm trying to decipher if it was... more
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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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03/22/18

Find the derivative of the function. f'(x)= arccsc 8x
Find the derivative of the function. f'(x)= arccsc 8x
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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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