11/08/16

IN NEED OF STATISTICS HELP!! PLS I cannot figure it out and I am getting so frustrated :(
In a particular municipality, it is believed that 25 percent of homes are not properly insulated. In order to test H0:p=.25 vs. HA:p≠.25 (where p is the population proportion of homes that are not... more
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11/08/16

A boat travels 35 km upstream and then back again in 4 hrs. 48 mins. If the speed of the ship in still water is 15 km/hrs., what is the water speed?
Think it has something to do with rt=D or something like that.
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11/02/16

I really need help on this problem. Thanks. Determine whether the series is absolutely convergent, conditionally convergent, or divergent.
infinity (−1)^n (5^(n) n!)/(11 · 18 · 25 · ? · (7n + 4)) n = 1  
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10/26/16

Surface area = 4pr2; where r is the radius of the sphere; p is a constant that is roughly equal to 3.
 i can not solve this so do it for me
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10/21/16

Calculus 2 Area of a Region
Can someone walk me through this? I'm not understanding.   Consider the region enclosed by the graphs of 2y=5√x , y=8 , 2y+1x=6 The area A of this region could be computed in two ways: 1) By... more
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10/18/16

times a number is 16 less than the square of that number. Find the negative solution.
times a number is 16 less than the square of that number. Find the negative solution.
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10/03/16

CALC 3 : Is the line through (-4, -6, 1) and (-2, 0, -3) parallel to the line through (8, 19, 8) and (3, 4, 18)?
Is the line through (−4, −6, 1) and (−2, 0, −3) parallel to the line through (8, 19, 8) and (3, 4, 18)?   Please use something along the lines of parametric and symmetric equations! This is... more
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07/12/16

The air temperature is a nice 20 degree Celsius. If a ball is dropped in a well, and the sound is heard 4.0s later, how deep is the well?
Hi. This is a physics 11 problem and I know the answer is 70.5m. 
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05/01/16

Find the area of the shaded region
 y=x-4 y=√2x   Two and X under radical
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04/21/16

A fair 6 sided die is rolled twice, how many possible outcomes are there
Statistics question:   A fair six-sided die is rolled twice: 1. How many possible outcomes are there? 2. What is the probability of getting a '2' each time? 3. Are these independent events?
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04/21/16

Riemann sum
 1. Evaluate the Riemann sum for (x) = x3 − 6x, for 0 ≤ x ≤ 3 with six sub intervals, taking the sample points, xi, to be the right endpoint of each interval. Give three decimal places in your... more
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04/18/16

I need help in finding: The voltage V across a charged capacitor is given by V(t)=7e^(-0.6t) where t is in seconds.
So I need help with finding    A. What is the voltage after two seonds? (rounded to the nearest 0.001 volts)   B. When will the voltage be 1? (rounded to the nearest 0.01 second)   C. By what... more
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04/12/16

Statistics: Suppose you are using a = 0.05 to test the claim that µ ? 14 using the p-value method.
Suppose you are using α = 0.05 to test the claim that μ ≠ 14 using the p-value method. You are told the TS: z = -1.97 . Find the p-value and determine the decision.   A. 0.0488; do not reject the... more
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03/03/16

How do you calculate velocity given mass and height and GPE
I need to calculate KE, ME, and velocity given GPE, mass and height
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03/02/16

One way Analysis of Variance(ANOVA), F-test
The data shows the result of experiment conducted to increase the sales of the company’s products,where 3 strategies were utilized. Test whether there is significant difference among the 3... more
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02/27/16

To lift a 1200 N motorcycle a vertical height of 1.3 m onto a pickup truck, a...
To lift a 1200 N motorcycle a vertical height of 1.3 m onto a pickup truck, a motocross rider pushes the bike up a ramp 2.4 m, requiring an effort force up the ramp of 820 N. What is the efficiency... more
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02/25/16

A 1500 W kettle warms 1.00 kg of water from ...
A 1500 W kettle warms 1.00 kg of water from 18oC to 88oC in a time of 3.6 min. How efficient is the kettle? Answer: 91%
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02/17/16

Physics question
1. Starting from rest, a proton falls through a potential difference of 1200 V. What speed does it acquire?   2. Calculate the net work done in moving an electron from point A, where the... more
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01/30/16

Finding the current in a complex circuit?
For the circuit shown below, find the current I1. (Take emf1 = 59.4 V, emf2 = 110.4 V, R1 = 19.2 Ω, and R2 = 5.50 Ω)   http://www.webassign.net/colfunphys1/20-p-026-alt.gif
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12/09/15

Radioactive Isotopes, exponential decay
The radioactive isotope 14C has a half-life of approximately 5715 years. Now there are 30g of 14C. (1) How much of it remains after 1400 years? ____ g  (2) How much of it remains after 14000 years?... more
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12/09/15

Radioactive Isotopes, Exponential Decay
The radioactive isotope 226Ra has a half-life of approximately 1599 years. After 1800 years, there are 2.5g of 226Ra. (1) What was the initial quantity? ____ g (2) How much of it remains after... more
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12/09/15

Radioactive Isotopes, exponential decay
The radioactive isotope 226Ra has a half-life of approximately 1599 years. There are 25g of 226Ra now. (1) How much of it remains after 1200 years? ____ g (2) How much of it remains after 12000... more
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12/08/15

Evaluate the integral below.
Evaluate the integral below.   ∫ 3??^−4?? ????
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12/07/15

Differentiate sinh-1 (tan(x))
Differentiate sinh−1 (tan(x))     ANSWER:  |sec(x)| practice test, #54
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12/07/15

When a cold drink is taken from a refrigerator, its temperature is 5ºC. After 25 minutes in a 20ºC room its temperature has increased to 10 ºC.
When a cold drink is taken from a refrigerator, its temperature is 5ºC. After 25 minutes in a 20ºC room its temperature has increased to 10 ºC. (a) What is the temperature of the drink after 50... more
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