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the number of tickets sold each day for an upcoming perfomance of Hendel's Messiah is given by N(x)=-0.4x^2+8x+10, where x is the number of days since the concert was announced.when will daily ticket sales peak and how many tickets will be sold that day?
The life span of a battery is normally distributed, with a mean of 2400 hours and a standard deviation of 50 hours. What persent of batteries have a life span that is more than 2455 hours?
to determine the number of deer in a game preserve, a conservatioist catches 569 deer, tags them and lets them loose. Later, 400 deer are caught; 200 of them are tagged. How many deer are in the preserve?
Find the value of the pronominal.
Two rainstorms occurred in one week in a certain area. In the first storm 25ml of rain fell per hour, and in the second storm 20ml of rain fell per hour. Rain fell that week for a total of 75 hours for a total rainfall of 1700ml.
Racing cars driven by Chris and Kelly are side by side at the start of a race. The table shows the velocities of each car (in mph) during the first 10 seconds of the race. Use the Midpoint Rule to estimate how much farther Kelly travels than Chris..
If you are given the percentage of people that have a certain characteristic and the size of the sample . How can you find the distribution of the sample proportion?
an experiment consists of 4 tosses of a coin.denoting the outcomes HHTH,THTT,and assuming that all 16 outcomes are equally likely, find the probability distribution for the total number of heads.
Assume at the begining of the year you purchase an investment for 5,900 that pays 80 annual income. Also assume the investments value has increased to 6,500 by the end of the year.
Imagine that a line on a Cartesian graph is approximately the distance y in feet a person walks in x hours. What does the slope of this line represent? How is this graph useful? Provide another example for your colleagues to explain.
A university has 10,000 students of which 50% are male. If a class of 30 students is chosen at random from the university population, find the mean and variance of the number of male students.
Prove the the center of gravity of a lamina in the shape of a parallelogram is at the point of intersection of the diagonals and that it is the same point as the center of gravity of four particles two of mass m at one pair of opposite vertices an..
Calculate a confidence interval for the average cost
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