Provide an appropriate response.The problem-solving strategy includes: I. identifying what you know II. knowing what you are looking for III. performing the solution plan
A. II
B. I
C. III
D. all of these
Answer: D
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Solve the problem.Chandra has 3 liters of a 21% solution of sodium hydroxide in a container. What is the amount and concentration of sodium hydroxide solution she must add to this in order to end up with 7 liters of 13% solution?
A. 4 L of 10% solution B. 4 L of 8% solution C. 4 L of 5% solution D. 4 L of 7% solution
For children between the ages of 5 and 13 years old, the Ehrenberg equation 
gives the relationship between the weight W (in kilograms) and the height h (in meters) of a child. Use differentials to estimate the change in the weight of a child who grows from 1.1 m to 1.3 m. Round the answer to the nearest tenth.
?
__________ kg
Fill in the blank(s) with the appropriate word(s).
Graph.y = -x2 + 2x - 4
A. 
B. 
C. 
D. 
Determine whether the graph of the equation is a circle or an ellipse.
+ 
= 1
A. Circle B. Ellipse