Find the largest open intervals where the function is concave upward.f(x) = 
A. (0, ?), (-?, 0)
B. (-?, 0)
C. (0, ?)
D. (-?, ?)
Answer: C
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Use the present value formula to determine the amount to be invested now, or the present value needed.The desired accumulated amount is $3100 after 2 years invested in an account with 5% interest compounded quarterly.
A. $3423.91 B. $2806.74 C. $293.26 D. $2811.79
Find the probability of the event. Express the answer as a fraction in simplest form.Getting a number less than 2 when rolling a six-sided die.
A. 
B. 
C. 
D. 
Solve the problem by estimating.Andy wants to buy a refrigerator for $699, a stove for $859, and a dishwasher for $249. Round each cost to the nearest hundred to estimate the total cost.
A. $1800 B. $1600 C. $1900 D. $1700
Use a graphing utility to graph the function over the indicated interval and approximate any local maxima and local minima. If necessary, round answers to two decimal places.f(x) = x3 - 12x + 2; (-5, 5)
A. local maximum at (-2, 18) local minimum at (0, 0) local minimum at (2, -14) B. local minimum at (0, 0) C. local maximum at (-2, 18) local minimum at (2, -14) D. none