Solve the problem.How many liters of a 40% alcohol solution must be mixed with 70 liters of a 90% solution to get a 50% solution?
A. 28 liters
B. 350 liters
C. 280 liters
D. 35 liters
Answer: C
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Evaluate the expression according to the order of operations.
- 4
A. 4 B. 60 C. 68 D. 12
Solve the problem.To find the height of this tree, Sarah marked the tree at eye level, 1.8 meters above the ground. She measured 25 m from the base of the tree and then held a 5-cm ruler vertically in front of her eye until the ruler just obscured the tree above the mark. Using a string tied through a hole in one end of the ruler, Sarah found that the distance from her eye to the ruler was 4.7 centimeters. What was the height of the tree? Round to the nearest unit.
A. 30 m B. 28 m C. 24 m D. 26 m
Use the graph of the parabola to determine the coordinates of the vertex. 
A. (1, -8) B. (1, -6) C. (-1, 6) D. (1, 6)
The graph of a function 
is given.
?
?
Find the coordinates of all points of inflection of this function (if any).
?
Please enter your answer as ordered pairs in the form (x, y) separated by commas.
What will be an ideal response?