02/01/19

Find y when x= 9, if y=-15 when x=27
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01/23/19

Write the equation of the line tangent to circle x^2+y^2=20 at the point (4, -2) -show work
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01/23/19

Escape velocity of a Body from Earth is 11 km/s. Assuming the mass and radius of Earth to be about 81 and 4 times the mass and radius of the Moon
Calculate the escape velocity from the surface of the Moon.I am not able to understand the Question!
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01/22/19

Calculus Homework
Consider the function f(x) = 2x + 5 / √ x^2 − 1 . Find f(5), f(a), f(x + h).
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12/20/18

A baseball with a mass of 0.75 kg is traveling at a speed of 35 m/s. Its is caught in the catchers mitt and brought to a stop.

A. What is the change in the momentum of the ball?B. If it takes the catcher 1.5 seconds to stop the ball, how much force does the glove apply to the ball?
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12/13/18

I need a step by step on how to do this problem...Anyone want to help?
What is the velocity of an 8 kg lead shot-put if it has 484 J of energy?
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12/12/18

A 18 ft ladder leans against a wall. The bottom of the ladder is 3 ft from the wall at time t=0 and slides away from the wall at a rate of 2ft/sec. Find the v of the top of the ladder at time t=2.
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12/10/18

what is an equation of the line that is parallel to y=5x-7and passes through (1,11)
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12/07/18

An unknown substance with a mass of 100 grams absorbs 1000 J while undergoing a temperature increase of 15 degrees Celsius what is the specific heat of the substance

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12/06/18

Differential equation

X(dy/dx) - y=(x^p) +1, where x is a real number and is not 0. p is a positive integer, p>1. Solve the differential equation given that y=-1 when x=1. Give ans in form y=f(x)
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12/05/18

need help math question
if f(x)=3x^7-4/x^2+4 (3√x+1, find f'(x) and f''(x)
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11/29/18

(Calculus 1 class) Use Newton's method to approximate the indicated root of the following equation: the root of tanx=x in the interval (pi/2, 3pi/2)
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11/28/18

Value of the 2nd capacitor
A 7.7µF capacitor is charged by a 125 V battery and then disconnected from the battery. When the charged capacitor (C1) is then placed in a circuit with a second, initially uncharged capacitor C2,... more
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11/25/18

The line y = mx + 4 is a tangent to y = 3x^2 + 5x + 7. Find the value of m.
Working out please!Step by step..Thank you!
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11/13/18

Simple Urgent question: voltage for circuit
A 6V battery, three resistors and three voltmeters are connected. What are the possible readings for each voltmeter?My answer: 3V for top resistor, 3V for second resistor and 6V for the bottom... more
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11/08/18

How do you simplify 6-√ -8/2?
I have a lot of trouble simplifying negative square roots because I don’t understand how to do it.
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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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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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