10/10/20

The central limit theorem

A population of values has a normal distribution with μ=41.8μ=41.8 and σ=59.3σ=59.3. You intend to draw a random sample of size n=231n=231.Find the probability that a single randomly selected value... more
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10/10/20

A box contains 5 red and 5 green balls. A ball is selected at random and its color is noted.
If this ball is red, it is replaced; if it is green, it is not replaced. Then, a second ball is drawn and its color is noted. Draw a tree and find the probability that: (a) the second ball is... more
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10/09/20

if y=6 when x=2/3 find x when y=12
Assume that y varies directly with x, then solve. Simplify completely. The answer is a fraction.
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10/09/20

You are asked to create a solution that is 3 parts water and 2 parts bleach. You have 4 liters of bleach. How much water should you add?
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10/09/20

what is the midpoint of line segment in the given point (1,1)and (9,9)
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10/09/20

A cookie factory uses 2⁄5 of a bag of flour in each batch of cookies. Yesterday, the factory used 4⁄5 of a bag of flour. How many batches did the factory make yesterday?
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10/09/20

Problem Set 3: Conversion and Rates
 Carlos was riding his bike home. The wind blew his cap 3 meters. About how many feet did the wind blow his cap? A. 3 feet B. 6 feet C. 9 feet D. 12 feet 
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10/09/20

English question

What's the difference between a theme and thesis statement?
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10/09/20

Algebra 1 elimination
Can you check if this is correct?Step 1. 5x + y = 9        10x - 7y = -18Step 2. -2(5x + y = 9)          10x - 7y = -18Step 3. -10x -2y = -18Step 4      -9y = -36 Step 5.y = 4
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10/08/20

I just don't understand it
The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 75.9 for a sample of size 701 and standard... more
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10/08/20

An experiment consists of rolling two fair dice and adding the dots on the two sides facing up. What is the probability that the sum of the dots is 11?
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10/08/20

Probability Density

The probability density of a random variable X is given in the figure below.From this density, the probability that X is between 0.72 and 1.1 is:
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10/08/20

Algebra 1 Word Question
The cost to manufacture x units of a certain product is given by C(x)=x2-60x+2700. Find the number of units that can be manufactured for a cost of $6700
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10/08/20

Confidence Intervals for the Mean
Assume that a sample is used to estimate a population mean μ. Find the margin of error M.E. that corresponds to a sample of size 8 with a mean of 57.8 and a standard deviation of 13.7 at a... more
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10/08/20

The rainfall total two years ago was 10.2inches. Last year’s total was 20% greater. What was last year’s rainfall total? *
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10/08/20

Is The Line through points P(0, 5) and Q(-1, 8) parallel to the line through points R(3, 3) and S(5, -1)? Explain.
If possible, please check out my other questions (geometry) THANK YOU SO MUCH!!!!
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10/08/20

Continuous Uniform Distribution

The lengths of a professor's classes has a continuous uniform distribution between 50.0 min and 52.0 min. If one such class is randomly selected, find the probability that the class length is less... more
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10/08/20

Two more than 4 times a number is -18
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10/08/20

The serial number on a bill consists of a letter followed by nine digits and then a letter. How many different serial numbers are possible, given the following conditions?
(a) Letters and digits cannot be repeated.(b) Letters and digits can be repeated.
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10/08/20

solve for x: 2sin²(x) + 3cos(x) - 3 = 0
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10/08/20

What salary marks the start of the upper 20% ?
Given that the average monthly salary of nurses in the Philippines is 23,000php with a standard deviation of 1,000 php. What salary marks the start of the upper 20% ?
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10/08/20

Confidence Intervals for Proportions
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 98% confident that your... more
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10/08/20

Find the exact values of sin 2θ, cos 2θ, and tan 2θ given the following: cos θ =-5/8 where θ is in quadrant III.
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10/08/20

If the variance is 4.9 grams, what is the standard deviation?
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10/08/20

Find the slope of X+3y=-6
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