05/05/20

Quantitative Analysis
   Probability of choosing three males from a group of 20 people of which 7 are female.
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04/30/20

Help with Spearman's rank correlation

A university course was taught by 2 different professors.Students could choose whether to attend the lectures given by professor Q or the lecture by professor R. At the end of the course, all... more
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04/29/20

Find the derivative of the function.
Find the derivative of the function.f(x) = ln( square root of (x) +7)
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04/29/20

Farmers and Watermelon Crops
What price do farmers get for their watermelon crops? In the third week of July, a random sample of 42 farming regions gave a sample mean of x = $6.88 per 100 pounds of watermelon. Assume that σ is... more
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04/29/20

differential equations
Set up a differential equation to model the salt mass for the following information. ‘A 100 liter tank starts with 20 L of pure water. A saline mix of 10 grams of salt per liter of water is pumped... more
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04/24/20

What’s the answer to In(2x-4)=In(x+6)
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04/21/20

Transform of a convolution problem
Find L^-1 {1/((s^3)*(s-1))} as a convolution and then evaluate the convolution
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04/21/20

Could someone verify I am understanding this Calculus problem correctly, please?
Hi, I am working on a problem and I think I have it solved, but would just like to make sure that I have done it correctly, if possible. I appreciate anyone taking the time to help me.Problem:"The... more
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04/21/20

Diffrention of functions
Differentiate.f(x) = 2xex csc x
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04/20/20

I have an important Physics Question
2 players push off each other: One has a mass of 60 kg. The other has a mass of 80 kg and moves back with a velocity of -3 m/s. What is the 60kg players momentum?
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04/20/20

five more than twice a number is 7

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04/16/20

the product of 4 and the sum of -5 and a number is -35
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04/15/20

What is the total charge, total current, voltage, power, and electrical energy?
2.67 x 10^20 electrons travel through a 25.0 W resistor in 0.878 s. Find:  (a) the total charge of the electrons  (b) the total current through the resistor,  (c) the voltage for the... more
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04/14/20

I am having trouble to solve this kind of question

suppose that f(x)=3x-1. find f(a+h)-f(a)/h
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04/14/20

Optics and magnification problems
1.A converging lens has a focal length of 0.48 m. If an object is placed at 0.07 m from the lens, where will its image be located?2.Is the image virtual or real in the previous question?3.A concave... more
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04/14/20

newton law of cooling
A mug of coffee, with a temperature 𝑇℃ is made and left to cool in a room with a temperature of 25℃. The rate at which the coffee cools is proportional to the difference in temperature between the... more
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04/10/20

Differentiate F(x)
Differentiate f(x)=4x√+3x
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04/08/20

Physics help polarization
Unpolarized light with an intensity of 22.4 lux passes through a polarizer whose transmission axis is vertically oriented. (a) What is the direction of polarized beam and intensity of the... more
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04/07/20

Help me out ! Calculus question
Find the  area inside the outer loop and outside the inner loop of the limacon r = 4 sin θ - 2
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03/31/20

What is coefficient for static friction

A 6-g bullet is shot into a 2.1-kg block of wood, where it becomes embedded. The block is initially at rest and the bullet has an initial velocity of 400 m/s. The block then travels 1.2 m... more
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03/27/20

A round loop of wire carries a current of 100 A, has a radius of 10 cm, and its normal (vector) makes an angle of 30∘ with a magnetic field of 0.324 T.
1)What is the torque on the loop? 2)What is the torque on the loop if the angle decreases to 10∘? 3)What is the torque on the loop if the angle increases to 50∘?
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03/27/20

A square loop 10 cm on a side consists of 100 turns of wire that experiences a minimum torque of zero and a maximum torque of 0.060 N⋅m.
If the current in the loop is 2.82 A, calculate the magnetic field strength that the loop rests in. 
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03/24/20

y varies directly as x. If y = 6 when x = 3, find y when x = -33
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03/19/20

A child pulls a 13.4 kg wagon across a level floor, causing it to accelerate at 6.2 m/s^2. If the force of friction between the wheels and the wagon is 5.7 N, what is the force applied by the child?

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03/19/20

A net force of 1.7 Newtons gives an object an acceleration of 3.2 m/s^2. What force would be required to give the same object an acceleration of 2.6 m/s^2?
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