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Question: FORMALDEHYDE LEVELS A study on formaldehyde levels in 900 homes indicates that emissions of various chemicals can decrease over time. The formaldehyde level (parts per million) in an average home in the study is given by
f(t) = 0.055t + 0.26 (0 ≤ t ≤ 12) t + 2
where t is the age of the house in years. How fast is the formaldehyde level of the average house dropping when it is new? At the beginning of its fourth year?
Find the level of production that will maximize revenue. If the producer s costs are given by C(x) = 2 + 3x what should his level of production be to maximize profits?
What is the equation of the vertical line through P? What is the equation of the horizontal line through P?
Find the first derivative of f. Find all critical points of f. Identify those intervals where f is increasing and those intervals where f is decreasing. Use the first derivative test to identify local extrema.
A rectangular field with a perimeter of 32 feet must have an area of at least 60 square feet (or possibly more). What are the possible values for the length of one side so that both conditions are met? Express your answer in interval notation.
What P (in working days) and T should be used to approximate the cost trade-offs of the EOQ? How much more safety stock is needed than with a Q system
What is the current value of a $1,000 bond with a 5% annual coupon rate (paid semi-annually) that matures in 6 years if the appropriate stated annual discount rate is 8%.
State the coordinates of the vertex of each parabola and whether it opens upward or downward.
Find the equation of the tangent line to the graph of f(x)=5-x2 at (2,1) you could first use the limit definition to find the slop. What expression would represent the slope?
Find the general solution to the differential equation: t2dy/dt+t(t+2)y=et t>0
Find the recurrence relation satisfied by Sn, where Sn is the number of regions into which three-dimensional space is divided by n planes if every three of the planes meet in one point, but no four of the planes go through the same point.
Calculate the exact 95 percent upper and lower confidence limits for the population mean of LOS. Calculate the exact 95 percent upper and lower confidence limits for the population mean of charges
A chemist needs 150 milliliters of a 23% solution but has only 12% and 27% solutions available. Find how many milliliters of each should be mixed to get the desired solution.
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