Find the largest open intervals where the function is concave upward.f(x) = 4x - 6e-x
A. ( -?, ? )
B. ( 0 , ? )
C. (-? , 0 )
D. None
Answer: D
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Find percent notation for the number in decimal notation.0.0083 of all products produced at a certain factory contain defects.
A. 0.83% B. 83% C. 8.3% D. 0.083
Evaluate.3x2 + 9x - 3 for x = -4
A. 9 B. -51 C. -1 D. 5
Find an equivalent fraction with the given denominator.
= 
A. 
B. 
C. 
D. 
Solve the problem.Ron attends a cocktail party (with his graphing calculator in his pocket). He wants to limit his food intake to 
protein, 118 g fat, and 159 g carbohydrate. According to the health conscious hostess, the marinated mushroom caps have 3 g protein, 5 g fat, and 9 g carbohydrate; the spicy meatballs have 14 g protein, 7 g fat, and 15 g carbohydrate; and the deviled eggs have 13 g protein, 15 g fat, and 6 g carbohydrate. How many of each snack can he eat to obtain his goal?
A. 9 mushrooms, 4 meatballs, 3 eggs B. 3 mushrooms, 9 meatballs, 4 eggs C. 10 mushrooms, 5 meatballs, 4 eggs D. 4 mushrooms, 3 meatballs, 9 eggs