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You're using an unreliable Wi-Fi connection. You send three emails - one to your bank, one to magazine, and one to your professor. Each email has a 30% chance of going through, independently of whe
An oil company is drilling for oil at three sites. According to the geological tests, the probabilities of determining oil at these three sites are 0.30, 0.15, and 0.20, respectively.
Dystopia county has three bridges. In the next year, Elder bridge has 11% chance of collapse, the Younger bridge has 4% chance of collapse, and the Ancient bridge has 20% chance of collapse. Determ
Determine the present value of ordinary annuity which has payments of $1100 per year for 19 years at 5% compounded annually.
Determine the exponential generating function of the partitions of the set [n], all of whose classes have a prime number of elements.
In a ballroom dance class, participants are divided in couples for each drill session. One partner leads and other follows for three minutes, and then the couple switches roles for next three minute
It is well known that infants born to mothers who smoke tend to be small and prone to the range of ailments. It is conjectured that also they look abnormal.
There're 20 people sitting in waiting room. The usher in charge should select 5 of these people to go to the green sanctuary and 3 of these people to go to the red sanctuary. In how many different m
Find out the singular points of the equation (x^2 + 2x)^2 Y" - 4xY' +5Y = 0 and classify them as regular or irregular.
You bring a bag of 12 snacks to animal shelter and discover that there're 18 animals there. To be fair, you don't want to provide more than one snack to any individual animal. How many manners are
Compute the probability that if 3 alphabetic letters are selected (no ordering), no letters are repeated? The probability that no letters are repeated is
The coordinates of the max for the solution curve. The value of t there the solution crosses the t-axis.
Producers will make 2000 refrigerators available when unit price is $330. At the unit price of 390, 6000 refrigerator will be marketed. Compute the equation relating the unit prive of refrigator to
Traffic signs are regulated by Manual upon Uniform Traffic Control Devices. The perimeter of some traffic signs should be 138 inches. It's length should be 9 inches longer than it's width. Determin
Helga's tennis outfits can be made up from 5 different shirts, 4 different shorts, 2 pairs of socks, and 2 pairs of shoes. But, she may choose to not wear socks. In how many manners can Helga dress
Let G = {(1), (12)(34), (1234)(56), (13)(24), (1432)(56), (56)(13), (14)(23), (24)(56)}. Determine the stabilizer of 1 and the orbit of 1.
Since matter is made of electrically charged particles, why don't we and the objects around us feel electric forces all the time?
Determine the corner points of each feasible region, algebraically and graphically.
Assume f(x) is a function from real numbers to real numbers such that the point (8;100) lies on the graph of f.
A line is perpedicular to the line 4x-3y=7. It also has the same y-intercept as the line 5x-4y=20. Determine the equation of the line in standard form?
Give an example of a positive series of rational numbers with bounded partial sums that does not have rational limits
Perform the multiplication and write the result in scientific notation.
There are 20 plants in your garden but only enough fertilizer spray to boost 8 of them. How many ways are there to fertilize the plants?
A common theme for motor vehicle license plates is to require that first three characters be letters and last three characters be numbers. How many vehicles could a state have using such a scheme? I
You bring the bag of twelve snacks to as well as animal shelter and discover that there are 18 animals there. To be fair, you don't want to give more than one snack to any individual animal. How man