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Let f(x)= 7x-4/ x+4. Find the open intervals on which f is concave up (down). Then determine the x-coordinates of all inflection points of f.1. f is concave up on the intervals 2. f is concave down on the intervals 3. The inflection points occur at x =
Notes: In the first two, your answer should either be a single interval, such as (0,1), a comma separated list of intervals, such as (-inf, 2), (3,4), or the word "none".In the last one, your answer should be a comma separated list of x values or the word "none".
You test the claim that the mean gas mileage of all cars of a certain make is less than28 miles per gallon (mpg).
(a) Find the expected number of students that will get an A, and the standard deviation of number of students that will get an A. (b) Find the probability that no student gets an A. (c) Find the probability that at most 2 students get an A.
After all you've read in this chapter about regional trade agreements, what is your assessment of their value? Should their progress continue or be rolled back?
Find the largest open intervals on which the function is concave up or concave down. If there is more than one interval, enter your intervals from left to right as they appear on the real line.
A firm makes and sells a computer for a 1000.the variable cost to produce a computer, for the range of production of the firm, $300 per unit. The total fixed costs per year to make the computer are $4.0 million. How many computers must be made..
Best Buy Company, Inc., purchased video and digital cameras from Sony for its new store in Shanghai, China, with a total of $148,287.
Blood Flow. A typical human heart pumps 70mL of blood with each stroke (stroke volume). What is the cardiac output over a period of 1 min. (use calculus, the check answers with algebra
The marginal revenue for a certain product is given by dR/dx = 25-2x. Find the change in revenue when sales increase from 7 to 10 units.
For a particular sample of 63 scores on a psychology exam, the following results were obtained. What score was earned by more students than any other score? Why? What was the highest score earned on the exam? What was the lowest score earned on t..
Let B = A[x] be a polynomial ring over a ring A and let I be an ideal of A. Prove (A/I)[x] B/IB, where the left-hand side is a polynomial ring.
The "Pile High Deli" offers a "simple sandwich" consisting of your choice of one of five different kinds of bread with your choice of butter or mayonnaise.
A poll of 60 students found that 37% were in favor of raising tution to build a new math building. The standard deviation of this poll is 5%. What would be the standard deviation if the sample size were increased from 60 to 253?
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